GDI+ 实现合成艺术字，并使艺术字透明

1.Default.aspx 前台HTML源码，调用了3个js，实现自动选择颜色的功能

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="WebFont.Default" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title>无标题页</title>
    <style>
        body
        {
            font-size: 14px;
        }
    </style>

</head>
<body>
    <form id="form1" runat="server">
    <div><div style="visibility:hidden;"><input name="sel1" visible="false" id="sel1" type="text" onfocus="VeryIDE.Color(this)" style="vertical-align:middle;" />
    <input name="sel2" visible="false" id="sel2" type="text" onfocus="VeryIDE.Color(this)" style="vertical-align:middle;" />
    <input name="sel3" visible="false" id="sel3" type="text" onfocus="VeryIDE.Color(this)" style="vertical-align:middle;" />

    <input name="sel4" visible="false" id="sel4" type="text" onfocus="VeryIDE.Color(this)" style="vertical-align:middle;" /></div>

        <table width="750" border="0" cellspacing="0" cellpadding="0" align="center" border="1">
            <tr>
                <td width="150" height="25">
                    字体：
                </td>
                <td>
                      <asp:DropDownList ID="dl_fontStyle" runat="server">
                        <asp:ListItem>微软雅黑</asp:ListItem>
                        <asp:ListItem>方正舒体</asp:ListItem>
                        <asp:ListItem>方正琥珀简体</asp:ListItem>
                        <asp:ListItem>方正华隶简体</asp:ListItem>
                        <asp:ListItem>方正黄草简体</asp:ListItem>
                        <asp:ListItem Selected="True">方正超粗黑简体</asp:ListItem>
                        <asp:ListItem>汉仪醒示体简</asp:ListItem>
                        <asp:ListItem>汉仪雪峰体简</asp:ListItem>
                        <asp:ListItem>汉仪篆书繁</asp:ListItem>
                        <asp:ListItem>华文彩云</asp:ListItem>
                        <asp:ListItem>华文细黑</asp:ListItem>
                        <asp:ListItem>华文新魏</asp:ListItem>
                        <asp:ListItem>华文行楷</asp:ListItem>
                        <asp:ListItem>黑体</asp:ListItem>
                        <asp:ListItem>隶书</asp:ListItem>
                        <asp:ListItem>宋体</asp:ListItem>
                        <asp:ListItem>楷体</asp:ListItem>
                        <asp:ListItem>幼圆</asp:ListItem>
                        <asp:ListItem>仿宋</asp:ListItem>
                    </asp:DropDownList>
                     字体大小：<asp:DropDownList ID="dl_fontSize" runat="server">
                        <asp:ListItem>10</asp:ListItem>
                        <asp:ListItem>20</asp:ListItem>
                        <asp:ListItem Selected="True">30</asp:ListItem>
                        <asp:ListItem>40</asp:ListItem>
                        <asp:ListItem>50</asp:ListItem>
                        <asp:ListItem>60</asp:ListItem>
                        <asp:ListItem>70</asp:ListItem>
                        <asp:ListItem>80</asp:ListItem>
                        <asp:ListItem>90</asp:ListItem>
                    </asp:DropDownList>
                     
                </td>
            </tr>
            <tr>
                <td width="150" height="25">
                    输入文字：
                </td>
                <td>
                      <asp:TextBox ID="tbWord" runat="server" Width="235px" MaxLength="100">特效文字</asp:TextBox>
                </td>
            </tr>
            <tr>
                <td width="150" height="25">
                    文字样式：
                </td>
                <td>
                     <img src="spacer.gif" alt="选择颜色" id="test" runat="server" style="border:#ccc solid 1px;20px;height:20px;vertical-align:middle;" onclick="VeryIDE.Color(this,$('sel1'))" />
                   <%-- <asp:DropDownList ID="DropDownList2" runat="server">
                        <asp:ListItem>红色</asp:ListItem>
                        <asp:ListItem>黄色</asp:ListItem>
                        <asp:ListItem>蓝色</asp:ListItem>
                        <asp:ListItem>绿色</asp:ListItem>
                        <asp:ListItem>黑色</asp:ListItem>
                        <asp:ListItem>白色</asp:ListItem>
                    </asp:DropDownList>--%>
                </td>
            </tr>
            <tr>
                <td width="150" height="25">
                    特效：
                </td>
                <td>
                     
                    <asp:DropDownList ID="dl_tx" runat="server" AutoPostBack="True"
                        onselectedindexchanged="dl_tx_SelectedIndexChanged">
                        <asp:ListItem Value="0">无特效</asp:ListItem>
                        <asp:ListItem Value="1">投影</asp:ListItem>
                        <asp:ListItem Value="2">立体</asp:ListItem>
                        <asp:ListItem Value="3">浮雕</asp:ListItem>
                        <asp:ListItem Value="4">描边</asp:ListItem>
                    </asp:DropDownList>
                </td>
            </tr>
            <tr id="mb" runat="server" visible="false"><td>描边颜色：</td><td><img src="spacer.gif" alt="选择颜色" id="Img3" runat="server" style="border:#ccc solid 1px;20px;height:20px;vertical-align:middle;" onclick="VeryIDE.Color(this,$('sel4'))" /></td></tr>
            <tr id="mytx" runat="server" visible="false">
                <td width="150" height="25">
                    特效颜色：(阴影颜色)
                </td>
                <td>
                     <img src="spacer.gif" alt="选择颜色" id="Img2" runat="server" style="border:#ccc solid 1px;20px;height:20px;vertical-align:middle;" onclick="VeryIDE.Color(this,$('sel2'))" />
                   <%-- <asp:DropDownList ID="dl_txcolor" runat="server">
                        <asp:ListItem>红色</asp:ListItem>
                        <asp:ListItem>黄色</asp:ListItem>
                        <asp:ListItem>蓝色</asp:ListItem>
                        <asp:ListItem>绿色</asp:ListItem>
                        <asp:ListItem>黑色</asp:ListItem>
                        <asp:ListItem>白色</asp:ListItem>
                    </asp:DropDownList>--%>
                    厚度：<asp:DropDownList ID="dl_txhd" runat="server">
                        <asp:ListItem>1</asp:ListItem>
                        <asp:ListItem>2</asp:ListItem>
                        <asp:ListItem>3</asp:ListItem>
                        <asp:ListItem>4</asp:ListItem>
                        <asp:ListItem>5</asp:ListItem>
                        <asp:ListItem>6</asp:ListItem>
                        <asp:ListItem>7</asp:ListItem>
                        <asp:ListItem>8</asp:ListItem>
                        <asp:ListItem>9</asp:ListItem>
                        <asp:ListItem>10</asp:ListItem>
                        <asp:ListItem>11</asp:ListItem>
                        <asp:ListItem>12</asp:ListItem>
                        <asp:ListItem>13</asp:ListItem>
                        <asp:ListItem>14</asp:ListItem>
                        <asp:ListItem>15</asp:ListItem>
                        <asp:ListItem>16</asp:ListItem>
                        <asp:ListItem>17</asp:ListItem>
                        <asp:ListItem>18</asp:ListItem>
                        <asp:ListItem>19</asp:ListItem>
                        <asp:ListItem>20</asp:ListItem>
                    </asp:DropDownList>
                     角度：<asp:DropDownList ID="dl_txjd" runat="server">
                        <asp:ListItem Value="0">右下角</asp:ListItem>
                        <asp:ListItem Value="1">左上角</asp:ListItem>
                        <asp:ListItem Value="2">右上角</asp:ListItem>
                        <asp:ListItem Value="3">左下角</asp:ListItem>
                    </asp:DropDownList>
                </td>
            </tr>
            <tr>
                <td width="150" height="25">
                    背景样式：
                </td>
                <td>
                     
                    <asp:DropDownList ID="dl_bgStyle" runat="server" AutoPostBack="True"
                        onselectedindexchanged="dl_bgStyle_SelectedIndexChanged">
                        <asp:ListItem Value="1">透明</asp:ListItem>
                        <asp:ListItem Value="2">纯色</asp:ListItem>
                    </asp:DropDownList>
                </td>
            </tr>
            <tr id="bgColor" runat="server" visible="false">
                <td width="150" height="25">
                    背景颜色：
                </td>
                <td>
                     <img src="spacer.gif" alt="选择颜色" id="Img1" runat="server" style="border:#ccc solid 1px;20px;height:20px;vertical-align:middle;" onclick="VeryIDE.Color(this,$('sel3'))" />
                    <%--<asp:DropDownList ID="dl_bgColor" runat="server">
                        <asp:ListItem>红色</asp:ListItem>
                        <asp:ListItem>黄色</asp:ListItem>
                        <asp:ListItem>蓝色</asp:ListItem>
                        <asp:ListItem>绿色</asp:ListItem>
                        <asp:ListItem>黑色</asp:ListItem>
                        <asp:ListItem>白色</asp:ListItem>
                    </asp:DropDownList>--%>
                </td>
            </tr>
            <tr>
                <td width="150" height="25">
                    预览：
                </td>
                <td style="background-color:Gray;">
                    <asp:Image ID="Image1" runat="server" Visible="false" />
                </td>
            </tr>
            <tr>
                <td width="150" height="25">
                </td>
                <td>
                    <asp:Button ID="btn" runat="server" Text="提交" OnClick="btn_Click" Width="84px" />
                </td>
            </tr>
        </table>
    </div>
    </form>
</body>
</html>
2.Default.aspx 后台源码

using System.Drawing;
using System.Drawing.Drawing2D;
using System.Drawing.Imaging;
using System.IO;

protected void btn_Click(object sender, EventArgs e)
        {
            string fontcolor = Request["sel1"];
            string fontshadecolor = Request["sel2"];//阴影颜色
            string bgcolor = Request["sel3"];//背景颜色
            string mbcolor = Request["sel4"];//描边颜色
            Color fc=Color.Black;//字体颜色
            Color shadecolor=Color.Red;//阴影颜色
            Color bgColor=Color.White;//背景颜色
            Color mbColor = Color.YellowGreen;//描边颜色
            System.Drawing.ColorConverter c = new ColorConverter();
            if (fontcolor != "")
            {
                fc = (System.Drawing.Color)c.ConvertFromString(fontcolor);//字体颜色
            }
            if (fontshadecolor != "")
            {
                shadecolor = (System.Drawing.Color)c.ConvertFromString(fontshadecolor);// 阴影颜色
            }
            if (bgcolor != "")
            {
                bgColor = (System.Drawing.Color)c.ConvertFromString(bgcolor);//背景颜色
            }
            if (mbcolor != "")
            {
                mbColor = (System.Drawing.Color)c.ConvertFromString(mbcolor);//描边颜色
            }
            string fontName = dl_fontStyle.SelectedValue.ToString();//字体名称
            int fontSize = Int32.Parse(dl_fontSize.SelectedItem.Text);//字体大小
            string fontText = tbWord.Text.Trim();//输入的文字
            int shadewidth = Int32.Parse(dl_txhd.SelectedItem.Text);//阴影厚度
            int shadejd = Int32.Parse(dl_txjd.SelectedValue.ToString());//阴影角度
            int tx = 0;//特效效果默认无特效
            tx = Int32.Parse(dl_tx.SelectedValue.ToString());//特效效果
            int bgstyle = Int32.Parse(dl_bgStyle.SelectedValue.ToString());//背景样式
            float bmpWidth = 100, bmpHeight = 100;//生成图片的大小根据字的宽度计算出来
            //**********************以下是计算字符串的宽度，高度，不是长度********************************************************//
            Bitmap bm = new Bitmap(250, 130, System.Drawing.Imaging.PixelFormat.Format32bppArgb);
            Font font = new Font(fontName, fontSize);
            Graphics g = Graphics.FromImage(bm);
            SizeF textSize;
            textSize = g.MeasureString(fontText, font);
            bmpWidth = textSize.Width+10;//字符串宽度
            bmpHeight = textSize.Height+10;//字符串高度
           // Response.Write("宽度:" + bmpWidth.ToString() + "<br/>高度是：" + bmpHeight.ToString() + "<br>长度是:" + fontText.Length.ToString());
            //***************************************************************************//
            string rev = "";
            switch (tx)
            {
                case 0://无特效
                    rev=ImageArt.无特效(bmpWidth, bmpHeight, fontName, fontSize, fc, bgstyle, bgColor, fontText);
                    break;
                case 1://投影
                    rev = ImageArt.投影(bmpWidth, bmpHeight, fontName, fontSize, fc, bgstyle, bgColor, fontText, shadecolor, shadewidth, shadejd);
                    break;
                case 2://立体
                    rev = ImageArt.立体(bmpWidth, bmpHeight, fontName, fontSize, fc, bgstyle, bgColor, fontText, shadecolor, shadewidth, shadejd);
                    break;
                case 3://浮雕
                    rev = ImageArt.浮雕(bmpWidth, bmpHeight, fontName, fontSize, fc, bgstyle, bgColor, fontText);
                    break;
                case 4:
                    rev = ImageArt.描边(bmpWidth, bmpHeight, fontName, fontSize, fc, bgstyle, bgColor, fontText,mbColor);
                    break;
            }
            string path = Server.MapPath("upload/");
            if (rev != "")
            {
                Image1.Visible = true;
                Image1.ImageUrl = path + "\\" + rev;
            }

        }

#region
        protected void dl_tx_SelectedIndexChanged(object sender, EventArgs e)
        {
            if (dl_tx.SelectedValue.ToString() == "1" || dl_tx.SelectedValue.ToString() == "2")
            {
                mytx.Visible = true;
            }
            else
            {
                mytx.Visible = false;
            }
            if (dl_tx.SelectedValue.ToString() == "4")
            {
                mb.Visible = true;
            }
            else
            {
                mb.Visible = false;
            }
        }

        protected void dl_bgStyle_SelectedIndexChanged(object sender, EventArgs e)
        {
            if (dl_bgStyle.SelectedValue == "2")
            {
                bgColor.Visible = true;
            }
            else
            {
                bgColor.Visible = false;
            }
        }
     #endregion

3.合成艺术字类ImageArt.cs

using System.Drawing;
using System.Drawing.Drawing2D;
using System.Drawing.Imaging;
using System.IO;
using System.Text;
using System.Drawing.Text;

/// <summary>
        /// 實現文字描邊
        /// </summary>
        /// <param name="words">文字</param>
        /// <param name="font">字體</param>
        /// <param name="wordColor">文字顏色</param>
        /// <param name="bordColor">邊框顏色</param>
        /// <returns>合成后圖片</returns>
        public static Bitmap DrawWords(String words, Font font, Color wordColor, Color bordColor, int bgStyle,Color bgColor)
        {
            Graphics g = Graphics.FromImage(new Bitmap(10, 10));
            SizeF size = g.MeasureString(words, font);
            Bitmap bmp = new Bitmap((int)size.Width + 2, (int)size.Height + 2);
            g = Graphics.FromImage(bmp);
            if (bgStyle == 1)//透明
            {
                g.Clear(Color.White);        //赋予图像一个背景色
            }
            else
            {
                g.Clear(bgColor);//背景色
            }
            SolidBrush brush = new SolidBrush(wordColor);
            g.DrawString(words, font, brush, new PointF(1, 1));
            brush.Dispose();
            g.Dispose();
            GC.Collect();
            for (int i = 0; i < bmp.Width; i++)
            {
                for (int j = 0; j < bmp.Height; j++)
                {
                    if (!ColorEquals(bmp.GetPixel(i, j), wordColor))
                    {
                        if (i < bmp.Width - 1 && j < bmp.Height - 1)
                        {
                            if (ColorEquals(bmp.GetPixel(i + 1, j), wordColor) || ColorEquals(bmp.GetPixel(i, j + 1), wordColor) || ColorEquals(bmp.GetPixel(i + 1, j + 1), wordColor))
                            {
                                bmp.SetPixel(i, j, bordColor);
                            }
                        }
                        if (i > 0 && j > 0)
                        {
                            if (ColorEquals(bmp.GetPixel(i - 1, j), wordColor) || ColorEquals(bmp.GetPixel(i, j - 1), wordColor) || ColorEquals(bmp.GetPixel(i - 1, j - 1), wordColor))
                            {
                                bmp.SetPixel(i, j, bordColor);
                            }
                        }
                    }
                }
            }
            return bmp;
        }
        private static bool ColorEquals(Color c1, Color c2)
        {
            if (c1.A != c2.A)
                return false;
            if (c1.R != c2.R)
                return false;
            if (c1.G != c2.G)
                return false;
            if (c1.B != c2.B)
                return false;
            return true;
        }

#region 描边

#region 描边
public static string 描边(float bmpWidth, float bmpHeight, string fontName, int fontSize, Color fontColor, int bgStyle, Color bgColor, string fontText,Color mbColor)
{

Font font = new Font(fontName, fontSize, FontStyle.Bold);

            Bitmap bm = DrawWords(fontText, font, fontColor, mbColor, bgStyle, bgColor);

            //********************************保存图片****************************//
            //设置保存路径
            string now = DateTime.Now.ToString("yyyyMMddHHmmssffff");
            string revImg = now + "1.GIF";
            string path = System.Web.HttpContext.Current.Server.MapPath("upload/");
            if (!Directory.Exists(path)) Directory.CreateDirectory(path);
            bm.Save(System.Web.HttpContext.Current.Server.MapPath("upload/" + now + ".GIF"), System.Drawing.Imaging.ImageFormat.Gif);
            bm.Dispose();
            if (bgStyle == 1)
            {
                //处理透明
                //*************开始处理背景透明**********************//
                Bitmap bm3 = (Bitmap)System.Drawing.Image.FromFile(path + "\\" + now + ".GIF");
                Bitmap bm4 = ImageToTrans.MakeTransparentGif(bm3, Color.White);

                if (!Directory.Exists(path)) Directory.CreateDirectory(path);
                bm4.Save(System.Web.HttpContext.Current.Server.MapPath("upload/" + revImg), System.Drawing.Imaging.ImageFormat.Gif);
                bm4.Dispose();
                bm3.Dispose();
                if (File.Exists(path + "\\" + now + ".GIF"))
                {
                    File.Delete(path + "\\" + now + ".GIF");
                }
            }
            else
            {
                //纯色
                revImg = now + ".GIF";
            }
            //*************************************************//
            return revImg;
        }
        #endregion

#region 浮雕效果
        /// <summary>
        /// 浮雕效果
        /// </summary>
        /// <param name="bmpWidth"></param>
        /// <param name="bmpHeiht"></param>
        /// <param name="fontName"></param>
        /// <param name="fontSize"></param>
        /// <param name="fontColor"></param>
        /// <param name="bgStyle"></param>
        /// <param name="bgColor"></param>
        /// <param name="fontText"></param>
        /// <returns></returns>
        public static string 浮雕(float bmpWidth, float bmpHeight, string fontName, int fontSize, Color fontColor, int bgStyle, Color bgColor, string fontText)
        {
            Bitmap bm = new Bitmap(Convert.ToInt32(bmpWidth), Convert.ToInt32(bmpHeight), System.Drawing.Imaging.PixelFormat.Format32bppArgb);
            //Color backcolor = bm.GetPixel(1, 1);
            //bm.MakeTransparent(backcolor);

Brush backBrush = new SolidBrush(Color.Black);
Brush foreBrush = new SolidBrush(fontColor);

            Font font = new Font(fontName, Convert.ToInt16(fontSize), FontStyle.Bold);
            Graphics g = Graphics.FromImage(bm);
            g.Clear(bgColor);

            g.TextRenderingHint = System.Drawing.Text.TextRenderingHint.SingleBitPerPixel;
            g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias;
            g.CompositingQuality = System.Drawing.Drawing2D.CompositingQuality.HighQuality;

            string text = fontText.Trim();
            SizeF size = g.MeasureString(text, font);
            Single posX = (Convert.ToInt32(bmpWidth) - Convert.ToInt32(size.Width)) / 2;
            Single posY = (Convert.ToInt32(bmpHeight) - Convert.ToInt32(size.Height)) / 2;
            g.DrawString(text, font, backBrush, posX + 3, posY + 3);
            g.DrawString(text, font, foreBrush, posX, posY);

            //********************************保存图片****************************//
            //设置保存路径
            string now = DateTime.Now.ToString("yyyyMMddHHmmssffff");
            string revImg = now + "1.GIF";
            string path = System.Web.HttpContext.Current.Server.MapPath("upload/");
            if (!Directory.Exists(path)) Directory.CreateDirectory(path);
            bm.Save(System.Web.HttpContext.Current.Server.MapPath("upload/" + now + ".GIF"), System.Drawing.Imaging.ImageFormat.Gif);
            bm.Dispose();
            if (bgStyle == 1)
            {
                //处理透明
                //*************开始处理背景透明**********************//
                Bitmap bm3 = (Bitmap)System.Drawing.Image.FromFile(path + "\\" + now + ".GIF");
                Bitmap bm4 = ImageToTrans.MakeTransparentGif(bm3, bgColor);

                if (!Directory.Exists(path)) Directory.CreateDirectory(path);
                bm4.Save(System.Web.HttpContext.Current.Server.MapPath("upload/" + revImg), System.Drawing.Imaging.ImageFormat.Gif);
                bm4.Dispose();
                bm3.Dispose();
                if (File.Exists(path + "\\" + now + ".GIF"))
                {
                    File.Delete(path + "\\" + now + ".GIF");
                }
            }
            else
            {
                //纯色
                revImg = now + ".GIF";
            }
            //*************************************************//
            return revImg;

}
#endregion

#region 浮雕效果
        /// <summary>
        /// 浮雕效果
        /// </summary>
        /// <param name="bmpWidth"></param>
        /// <param name="bmpHeiht"></param>
        /// <param name="fontName"></param>
        /// <param name="fontSize"></param>
        /// <param name="fontColor"></param>
        /// <param name="bgStyle"></param>
        /// <param name="bgColor"></param>
        /// <param name="fontText"></param>
        /// <returns></returns>
        public static string 浮雕(float bmpWidth, float bmpHeight, string fontName, int fontSize, Color fontColor, int bgStyle, Color bgColor, string fontText)
        {
            Bitmap bm = new Bitmap(Convert.ToInt32(bmpWidth), Convert.ToInt32(bmpHeight), System.Drawing.Imaging.PixelFormat.Format32bppArgb);
            //Color backcolor = bm.GetPixel(1, 1);
            //bm.MakeTransparent(backcolor);

Brush backBrush = new SolidBrush(Color.Black);
Brush foreBrush = new SolidBrush(fontColor);

            Font font = new Font(fontName, Convert.ToInt16(fontSize), FontStyle.Bold);
            Graphics g = Graphics.FromImage(bm);
            g.Clear(bgColor);

            g.TextRenderingHint = System.Drawing.Text.TextRenderingHint.SingleBitPerPixel;
            g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias;
            g.CompositingQuality = System.Drawing.Drawing2D.CompositingQuality.HighQuality;

            string text = fontText.Trim();
            SizeF size = g.MeasureString(text, font);
            Single posX = (Convert.ToInt32(bmpWidth) - Convert.ToInt32(size.Width)) / 2;
            Single posY = (Convert.ToInt32(bmpHeight) - Convert.ToInt32(size.Height)) / 2;
            g.DrawString(text, font, backBrush, posX + 3, posY + 3);
            g.DrawString(text, font, foreBrush, posX, posY);

            //********************************保存图片****************************//
            //设置保存路径
            string now = DateTime.Now.ToString("yyyyMMddHHmmssffff");
            string revImg = now + "1.GIF";
            string path = System.Web.HttpContext.Current.Server.MapPath("upload/");
            if (!Directory.Exists(path)) Directory.CreateDirectory(path);
            bm.Save(System.Web.HttpContext.Current.Server.MapPath("upload/" + now + ".GIF"), System.Drawing.Imaging.ImageFormat.Gif);
            bm.Dispose();
            if (bgStyle == 1)
            {
                //处理透明
                //*************开始处理背景透明**********************//
                Bitmap bm3 = (Bitmap)System.Drawing.Image.FromFile(path + "\\" + now + ".GIF");
                Bitmap bm4 = ImageToTrans.MakeTransparentGif(bm3, bgColor);

                if (!Directory.Exists(path)) Directory.CreateDirectory(path);
                bm4.Save(System.Web.HttpContext.Current.Server.MapPath("upload/" + revImg), System.Drawing.Imaging.ImageFormat.Gif);
                bm4.Dispose();
                bm3.Dispose();
                if (File.Exists(path + "\\" + now + ".GIF"))
                {
                    File.Delete(path + "\\" + now + ".GIF");
                }
            }
            else
            {
                //纯色
                revImg = now + ".GIF";
            }
            //*************************************************//
            return revImg;

}
#endregion

#region 立体效果
        /// <summary>
        /// 立体效果图
        /// </summary>
        /// <param name="bmpWidth">画布宽度</param>
        /// <param name="bmpHeight">画布高度</param>
        /// <param name="fontName">字体名称</param>
        /// <param name="fontSize">字体大小</param>
        /// <param name="fontColor">字体颜色</param>
        /// <param name="bgStyle">字体样式</param>
        /// <param name="bgColor">背景颜色</param>
        /// <param name="fontText">输入的字体</param>
        /// <param name="shadeColor">阴影颜色</param>
        /// <param name="shadeHd">阴影厚度</param>
        /// <param name="shadeJd">阴影角度</param>
        /// <returns></returns>
        public static string 立体(float bmpWidth, float bmpHeight, string fontName, int fontSize, Color fontColor, int bgStyle, Color bgColor, string fontText, Color shadeColor, int shadeHd, int shadeJd)
        {
            Bitmap bm = new Bitmap(Convert.ToInt32(bmpWidth), Convert.ToInt32(bmpHeight), System.Drawing.Imaging.PixelFormat.Format32bppArgb);
            int i = 0;
            Brush backBrush = new SolidBrush(shadeColor);//阴影画刷
            Brush foreBrush = new SolidBrush(fontColor);
            Font font = new Font(fontName, System.Convert.ToInt16(fontSize), FontStyle.Regular);
            Graphics g = Graphics.FromImage(bm);
            g.TextRenderingHint = System.Drawing.Text.TextRenderingHint.SingleBitPerPixel;
            g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias;
            g.CompositingQuality = System.Drawing.Drawing2D.CompositingQuality.HighQuality;

            if (bgStyle == 1)//透明
            {
                g.Clear(Color.White);        //赋予图像一个背景色
            }
            else
            {
                g.Clear(bgColor);//背景色
            }

            SizeF size = g.MeasureString(fontText, font);
            Single posX = (Convert.ToInt32(bmpWidth) - Convert.ToInt16(size.Width)) / 2;
            Single posY = (Convert.ToInt32(bmpHeight) - Convert.ToInt16(size.Height)) / 3;
            //左下角
            //********************************************//
            while (i < Convert.ToInt16(shadeHd))//20
            {
                //g.DrawString(text, font, backBrush, posX - i, posY + i);//左下角
                //g.DrawString(text, font, backBrush, posX - i, posY - i);//左上角
                // g.DrawString(text, font, backBrush, posX + i, posY - i);//右上角

                if (shadeJd == 0)//右下角
                {
                    g.DrawString(fontText, font, backBrush, posX + i, posY + i);//右下角
                }
                else if (shadeJd == 1)//左上角
                {
                    g.DrawString(fontText, font, backBrush, posX - i, posY - i);//左上角
                }
                else if (shadeJd == 2)//右上角
                {
                    g.DrawString(fontText, font, backBrush, posX + i, posY - i);//右上角
                }
                else if (shadeJd == 3)//左下角
                {
                    g.DrawString(fontText, font, backBrush, posX - i, posY + i);//左下角
                }
                    i = i + 1;
            }
            //******************************************//
            g.DrawString(fontText, font, foreBrush, posX, posY);
            g.Dispose();

            //********************************保存图片****************************//
            //设置保存路径
            string now = DateTime.Now.ToString("yyyyMMddHHmmssffff");
            string revImg = now + "1.GIF";
            string path = System.Web.HttpContext.Current.Server.MapPath("upload/");
            if (!Directory.Exists(path)) Directory.CreateDirectory(path);
            bm.Save(System.Web.HttpContext.Current.Server.MapPath("upload/" + now + ".GIF"), System.Drawing.Imaging.ImageFormat.Gif);
            bm.Dispose();
            if (bgStyle == 1)
            {
                //处理透明
                //*************开始处理背景透明**********************//
                Bitmap bm3 = (Bitmap)System.Drawing.Image.FromFile(path + "\\" + now + ".GIF");
                Bitmap bm4 = ImageToTrans.MakeTransparentGif(bm3, Color.White);

                if (!Directory.Exists(path)) Directory.CreateDirectory(path);
                bm4.Save(System.Web.HttpContext.Current.Server.MapPath("upload/" + revImg), System.Drawing.Imaging.ImageFormat.Gif);
                bm4.Dispose();
                bm3.Dispose();
                if (File.Exists(path + "\\" + now + ".GIF"))
                {
                    File.Delete(path + "\\" + now + ".GIF");
                }
            }
            else
            {
                //纯色
                revImg = now + ".GIF";
            }
            //*************************************************//
            return revImg;
        }
        #endregion
        #region 投影各种效果
        /// <summary>
        /// 投影效果艺术字
        /// </summary>
        /// <param name="bmpWidth">图片宽度</param>
        /// <param name="bmpHeight">图片高度</param>
        /// <param name="fontName">字体名称</param>
        /// <param name="fontSize">字体大小</param>
        /// <param name="fontColor">字体颜色</param>
        /// <param name="bgStyle">背景样式</param>
        /// <param name="bgColor">背景颜色</param>
        /// <param name="fontText">输入的文字</param>
        /// <param name="shadeColor">阴影颜色</param>
        /// <param name="shadeHd">阴影厚度</param>
        /// <param name="shadeJd">阴影角度</param>
        /// <returns></returns>
        public static string 投影(float bmpWidth,float bmpHeight,string fontName,int fontSize,Color fontColor,int bgStyle,Color bgColor,string fontText,Color shadeColor,int shadeHd,int shadeJd)
        {
            //先画一个矩形画布
            RectangleF rectF = new RectangleF(10, 10, bmpWidth, bmpHeight);
            Bitmap bm = new Bitmap(Convert.ToInt32(bmpWidth), Convert.ToInt32(bmpHeight), PixelFormat.Format32bppArgb);
            Font font = new Font(fontName, fontSize, FontStyle.Bold);
            Graphics g = Graphics.FromImage(bm);
            g.TextRenderingHint = System.Drawing.Text.TextRenderingHint.SingleBitPerPixel;
            g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias;
            g.CompositingQuality = System.Drawing.Drawing2D.CompositingQuality.HighQuality;
            if (bgStyle == 1)//透明
            {
                g.Clear(Color.White);        //赋予图像一个背景色
            }
            else
            {
                g.Clear(bgColor);//背景色
            }
            SolidBrush fgBrush = new SolidBrush(fontColor);//字体画刷
            SolidBrush bgBrush = new SolidBrush(bgColor);//背景画刷

             StringFormat format = new StringFormat();
             format.Alignment=StringAlignment.Near;
            g.FillRectangle(bgBrush, rectF);
            int shadejd = shadeJd;//阴影角度
            int shadehd = shadeHd;//阴影厚度
            if (shadejd == 0)//右下角
            {
                rectF.Offset(+shadehd, +shadehd);
                g.DrawString(fontText, font, new SolidBrush(shadeColor), rectF, format);
                rectF.Offset(-shadehd, -shadehd);
            }
            else if (shadejd == 1)//左上角
            {
                rectF.Offset(-shadehd, -shadehd);
                g.DrawString(fontText, font, new SolidBrush(shadeColor), rectF, format);
                rectF.Offset(+shadehd, +shadehd);
            }
            else if (shadejd == 2)//右上角
            {
                rectF.Offset(+shadehd, -shadehd);
                g.DrawString(fontText, font, new SolidBrush(shadeColor), rectF, format);
                rectF.Offset(-shadehd, +shadehd);
            }
            else if(shadejd==3)//左下角
            {

                rectF.Offset(-shadehd, +shadehd);
                g.DrawString(fontText, font, new SolidBrush(shadeColor), rectF, format);
                rectF.Offset(+shadehd, -shadehd);
            }
            g.DrawString(fontText, font, fgBrush, rectF, format);
            g.Dispose();
            //********************************保存图片****************************//
            //设置保存路径
            string now = DateTime.Now.ToString("yyyyMMddHHmmssffff");
            string revImg = now + "1.GIF";
            string path = System.Web.HttpContext.Current.Server.MapPath("upload/");
            if (!Directory.Exists(path)) Directory.CreateDirectory(path);
            bm.Save(System.Web.HttpContext.Current.Server.MapPath("upload/" + now + ".GIF"), System.Drawing.Imaging.ImageFormat.Gif);
            bm.Dispose();
            if (bgStyle == 1)
            {
                //处理透明
                //*************开始处理背景透明**********************//
                Bitmap bm3 = (Bitmap)System.Drawing.Image.FromFile(path + "\\" + now + ".GIF");
                Bitmap bm4 = ImageToTrans.MakeTransparentGif(bm3, Color.White);

                if (!Directory.Exists(path)) Directory.CreateDirectory(path);
                bm4.Save(System.Web.HttpContext.Current.Server.MapPath("upload/" + revImg), System.Drawing.Imaging.ImageFormat.Gif);
                bm4.Dispose();
                bm3.Dispose();
                if (File.Exists(path + "\\" + now + ".GIF"))
                {
                    File.Delete(path + "\\" + now + ".GIF");
                }
            }
            else
            {
                //纯色
                revImg = now + ".GIF";
            }
            //*************************************************//
            return revImg;

}
#endregion

#region 无特效艺术字
        /// <summary>
        /// 无特效生成艺术字
        /// </summary>
        /// <param name="bmpWidth">需要生成图片宽度</param>
        /// <param name="bmpHeight">需要生成图片高度</param>
        /// <param name="fontName">字体名称</param>
        /// <param name="fontSize">字体大小</param>
        /// <param name="fontColor">字体颜色</param>
        /// <param name="bgStyle">背景样式</param>
        /// <param name="bgColor">背景颜色</param>
        /// <param name="fontText">需要操作的文字</param>
        /// <returns></returns>
        public static string 无特效(float bmpWidth,float bmpHeight,string fontName,int fontSize,Color fontColor,
            int bgStyle,Color bgColor,string fontText)
        {
            Bitmap bm = new Bitmap(Convert.ToInt32(bmpWidth), Convert.ToInt32(bmpHeight), System.Drawing.Imaging.PixelFormat.Format32bppArgb);//需要绘图的bmp

Font font = new Font(fontName, fontSize, FontStyle.Bold);

            Graphics g = Graphics.FromImage(bm);
            g.TextRenderingHint = System.Drawing.Text.TextRenderingHint.SingleBitPerPixel;
            //g.TextRenderingHint = System.Drawing.Text.TextRenderingHint.ClearTypeGridFit;
            g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias;
            g.CompositingQuality = System.Drawing.Drawing2D.CompositingQuality.HighQuality;
            if (bgStyle == 1)//透明
            {
                g.Clear(Color.White);        //赋予图像一个背景色
            }
            else
            {
                g.Clear(bgColor);//背景色
            }

SizeF textSize;
textSize = g.MeasureString(fontText, font);

            g.DrawString(fontText, font, new SolidBrush(fontColor), (bmpWidth - textSize.Width) / 2, (bmpHeight - textSize.Height) / 2);
            g.Dispose();
            //设置保存路径
            string now = DateTime.Now.ToString("yyyyMMddHHmmssffff");
            string revImg = now + "1.GIF";
            string path =System.Web.HttpContext.Current.Server.MapPath("upload/");
            if (!Directory.Exists(path)) Directory.CreateDirectory(path);
            bm.Save(System.Web.HttpContext.Current.Server.MapPath("upload/"+now+".GIF"), System.Drawing.Imaging.ImageFormat.Gif);
            bm.Dispose();
            if (bgStyle == 1)
            {
                //处理透明
                //*************开始处理背景透明**********************//
                Bitmap bm3 = (Bitmap)System.Drawing.Image.FromFile(path + "\\" + now + ".GIF");
                Bitmap bm4 = ImageToTrans.MakeTransparentGif(bm3, Color.White);

                if (!Directory.Exists(path)) Directory.CreateDirectory(path);
                bm4.Save(System.Web.HttpContext.Current.Server.MapPath("upload/" + revImg), System.Drawing.Imaging.ImageFormat.Gif);
                bm4.Dispose();
                bm3.Dispose();
                if (File.Exists(path + "\\" + now + ".GIF"))
                {
                    File.Delete(path + "\\" + now + ".GIF");
                }
            }
            else
            {
                //纯色
                revImg = now + ".GIF";
            }
            return revImg;
            //******************处理透明结束********************//
        }
        #endregion

#region 无特效艺术字
        /// <summary>
        /// 无特效生成艺术字
        /// </summary>
        /// <param name="bmpWidth">需要生成图片宽度</param>
        /// <param name="bmpHeight">需要生成图片高度</param>
        /// <param name="fontName">字体名称</param>
        /// <param name="fontSize">字体大小</param>
        /// <param name="fontColor">字体颜色</param>
        /// <param name="bgStyle">背景样式</param>
        /// <param name="bgColor">背景颜色</param>
        /// <param name="fontText">需要操作的文字</param>
        /// <returns></returns>
        public static string 无特效(float bmpWidth,float bmpHeight,string fontName,int fontSize,Color fontColor,
            int bgStyle,Color bgColor,string fontText)
        {
            Bitmap bm = new Bitmap(Convert.ToInt32(bmpWidth), Convert.ToInt32(bmpHeight), System.Drawing.Imaging.PixelFormat.Format32bppArgb);//需要绘图的bmp

Font font = new Font(fontName, fontSize, FontStyle.Bold);

            Graphics g = Graphics.FromImage(bm);
            g.TextRenderingHint = System.Drawing.Text.TextRenderingHint.SingleBitPerPixel;
            //g.TextRenderingHint = System.Drawing.Text.TextRenderingHint.ClearTypeGridFit;
            g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias;
            g.CompositingQuality = System.Drawing.Drawing2D.CompositingQuality.HighQuality;
            if (bgStyle == 1)//透明
            {
                g.Clear(Color.White);        //赋予图像一个背景色
            }
            else
            {
                g.Clear(bgColor);//背景色
            }

SizeF textSize;
textSize = g.MeasureString(fontText, font);

            g.DrawString(fontText, font, new SolidBrush(fontColor), (bmpWidth - textSize.Width) / 2, (bmpHeight - textSize.Height) / 2);
            g.Dispose();
            //设置保存路径
            string now = DateTime.Now.ToString("yyyyMMddHHmmssffff");
            string revImg = now + "1.GIF";
            string path =System.Web.HttpContext.Current.Server.MapPath("upload/");
            if (!Directory.Exists(path)) Directory.CreateDirectory(path);
            bm.Save(System.Web.HttpContext.Current.Server.MapPath("upload/"+now+".GIF"), System.Drawing.Imaging.ImageFormat.Gif);
            bm.Dispose();
            if (bgStyle == 1)
            {
                //处理透明
                //*************开始处理背景透明**********************//
                Bitmap bm3 = (Bitmap)System.Drawing.Image.FromFile(path + "\\" + now + ".GIF");
                Bitmap bm4 = ImageToTrans.MakeTransparentGif(bm3, Color.White);

                if (!Directory.Exists(path)) Directory.CreateDirectory(path);
                bm4.Save(System.Web.HttpContext.Current.Server.MapPath("upload/" + revImg), System.Drawing.Imaging.ImageFormat.Gif);
                bm4.Dispose();
                bm3.Dispose();
                if (File.Exists(path + "\\" + now + ".GIF"))
                {
                    File.Delete(path + "\\" + now + ".GIF");
                }
            }
            else
            {
                //纯色
                revImg = now + ".GIF";
            }
            return revImg;
            //******************处理透明结束********************//
        }
        #endregion

其中用到的一个透明类，下篇继续。。。并有完整事列下载，如下载失效请联系 ggbbeyou@126.com

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原文地址：https://www.cnblogs.com/ggbbeyou/p/1356866.html

GDI+ 实现 合成艺术字，并使艺术字透明

GDI+ 实现合成艺术字，并使艺术字透明