• 使用ASP.net(C#)批量上传图片并自动生成缩略图,文字水印图,图片水印图 from


           因本网站上传图片的需要,参考很多成熟的经验,在ASP.net平台上使用C#语言,做了这一自动批量上传图片的.ASPX文件,并经调试成功,在本网站上使用,现发出来供大家参考,也希望高手多加指点。

            本程序主要功能有:

            (1)可以根据自己的需要更改上传到服务器上的目录,上传的源图、缩略图、文字水印图和图片水印图分别存入所定目录下的不同目录;

            (2)自动检查目录,如无所选择的目录,则自动创建它们;

            (3)自行设定生成缩略图的大小;

            (4)可以选择是否需要生成文字水印、图片水印,默认为不生成水印图;

            (5)可以添加、删除所需上传的图片。

            在本程序中均加了相关注释,所以直接发代码,不再多作解释。

       后台程序:

            using System;
    using System.Collections;
    using System.Configuration;
    using System.Data;
    using System.Linq;
    using System.Web;
    using System.Web.Security;
    using System.Web.UI;
    using System.Web.UI.HtmlControls;
    using System.Web.UI.WebControls;
    using System.Web.UI.WebControls.WebParts;
    using System.Xml.Linq;
    using System.IO;
    using System.Net;
    using System.Text.RegularExpressions;

    /// 〈summary>
    /// FileUpload1.HasFile  如果是true,则表示该控件有文件要上传
    /// FileUpload1.FileName  返回要上传文件的名称,不包含路径信息
    /// FileUpload1.FileContent  返回一个指向上传文件的流对象
    /// FileUpload1.PostedFile   返回已经上传文件的引用
    /// FileUpload1.PostedFile.ContentLength  返回上传文件的按字节表示的文件大小
    /// FileUpload1.PostedFile.ContentType    返回上传文件的MIME内容类型,也就是文件类型,如返回"image/jpg"
    /// FileUpload1.PostedFile.FileName       返回文件在客户端的完全路径(包括文件名全称)
    /// FileUpload1.PostedFile.InputStream    返回一个指向上传文件的流对象
    /// FileInfo对象表示磁盘或网络位置上的文件。提供文件的路径,就可以创建一个FileInfo对象:
    /// 〈/summary>

    public partial class BackManagement_ImagesUpload : System.Web.UI.Page
    {
        public string treePath = "";
        public int imageW = 100;
        public int imageH = 100;
        protected void Page_Load(object sender, EventArgs e)
        {
            this.Button5.Attributes.Add("Onclick", "window.close();"); //在本地关闭当前页,而不需要发送到服务器去关闭当前页时
            if (!Page.IsPostBack)
            {
                Label2.Text = Server.MapPath("/");
                TextBox3.Text = "ImageUpload";
                treePath = Server.MapPath("/") + TextBox3.Text.Trim() + "/";
                TextBox4.Text = imageW.ToString();
                TextBox5.Text = imageH.ToString();
            }
        }
        protected void btnload_Click(object sender, EventArgs e)
        {
            //如果保存图片的目录不存在,由创建它
            treePath = Server.MapPath("/") + TextBox3.Text.Trim() + "/";
            imageW = Convert.ToInt32(TextBox4.Text.ToString());
            imageH = Convert.ToInt32(TextBox5.Text.ToString());
            if (!File.Exists(treePath + "images"))   //如果/ImageUpload/images不存在,则创建/ImageUpload/images,用于存放源图片
            {
                System.IO.Directory.CreateDirectory(treePath + "images");
            }
            if (!File.Exists(treePath + "thumbnails"))   //如果/ImageUpload/thumbnails不存在,则创建/ImageUpload/thumbnails,用于存放缩略图片
            {
                System.IO.Directory.CreateDirectory(treePath + "thumbnails");
            }
            if (!File.Exists(treePath + "textImages"))   //如果/ImageUpload/textImages不存在,则创建/ImageUpload/textImages,用于存文字水印图片
            {
                System.IO.Directory.CreateDirectory(treePath + "textImages");
            }
            if (!File.Exists(treePath + "waterImages"))   //如果/ImageUpload/waterImages不存在,则创建/ImageUpload/waterImages,用于存图形水印图片
            {
                System.IO.Directory.CreateDirectory(treePath + "waterImages");
            }

            if (FileUpload1.HasFile)   //如果是true,则表示该控件有文件要上传
            {
                string fileContentType = FileUpload1.PostedFile.ContentType;
                if (fileContentType == "image/bmp" || fileContentType == "image/gif" || fileContentType == "image/pjpeg")
                {
                    string name = FileUpload1.PostedFile.FileName;                         //返回文件在客户端的完全路径(包括文件名全称)

                    FileInfo file = new FileInfo(name);                                    //FileInfo对象表示磁盘或网络位置上的文件。提供文件的路径,就可以创建一个FileInfo对象:
                    string fileName = file.Name;                                           // 文件名称
                    string fileName_s = "x_" + file.Name;                                  // 缩略图文件名称
                    string fileName_sy = "text_" + file.Name;                              // 水印图文件名称(文字)
                    string fileName_syp = "water_" + file.Name;                            // 水印图文件名称(图片)

                    string webFilePath = treePath + "images/" + fileName;          // 服务器端文件路径
                    string webFilePath_s = treePath + "thumbnails/" + fileName_s;    // 服务器端缩略图路径
                    string webFilePath_sy = treePath + "textImages/" + fileName_sy;   // 服务器端带水印图路径(文字)
                    string webFilePath_syp = treePath + "waterImages/" + fileName_syp; // 服务器端带水印图路径(图片)
                    string webFilePath_sypf = Server.MapPath("../images/tzwhx.png");               // 服务器端水印图路径(图片)
                   
                    if (!File.Exists(webFilePath))
                    {
                        try
                        {
                            FileUpload1.SaveAs(webFilePath);                                // 使用 SaveAs 方法保存文件
                            if (CheckBox1.Checked)                                          //是否生成文字水印图
                            {
                                AddWater(webFilePath, webFilePath_sy);
                            }
                            if (CheckBox2.Checked)                                          //是否生成图形水印图
                            {
                                AddWaterPic(webFilePath, webFilePath_syp, webFilePath_sypf);
                            }
                            MakeThumbnail(webFilePath, webFilePath_s, imageW, imageH, "Cut");     // 生成缩略图方法
                            Label1.Text = "提示:文件“" + fileName + "”成功上传,并生成“" + fileName_s + "”缩略图,文件类型为:" + FileUpload1.PostedFile.ContentType + ",文件大小为:" + FileUpload1.PostedFile.ContentLength + "B";
                            Image1.ImageUrl = "/" + TextBox3.Text.ToString() + "/images/" + fileName;
                            TextBox1.Text = webFilePath;
                            TextBox2.Text = "/" + TextBox3.Text.ToString() + "/images/" + fileName;
                        }
                        catch (Exception ex)
                        {
                            Label1.Text = "提示:文件上传失败,失败原因:" + ex.Message;
                        }
                    }
                    else
                    {
                        Label1.Text = "提示:文件已经存在,请重命名后上传";
                    }
                }
                else
                {
                    Label1.Text = "提示:文件类型不符";
                }
            }
        }
        /**/
        /// 〈summary>
        /// 生成缩略图
        /// 〈/summary>
        /// 〈param name="originalImagePath">源图路径(物理路径)〈/param>
        /// 〈param name="thumbnailPath">缩略图路径(物理路径)〈/param>
        /// 〈param name="width">缩略图宽度〈/param>
        /// 〈param name="height">缩略图高度〈/param>
        /// 〈param name="mode">生成缩略图的方式〈/param>   
        public static void MakeThumbnail(string originalImagePath, string thumbnailPath, int width, int height, string mode)
        {
            System.Drawing.Image originalImage = System.Drawing.Image.FromFile(originalImagePath);

            int towidth = width;
            int toheight = height;

            int x = 0;
            int y = 0;
            int ow = originalImage.Width;
            int oh = originalImage.Height;

            switch (mode)
            {
                case "HW"://指定高宽缩放(可能变形)               
                    break;
                case "W"://指定宽,高按比例                   
                    toheight = originalImage.Height * width / originalImage.Width;
                    break;
                case "H"://指定高,宽按比例
                    towidth = originalImage.Width * height / originalImage.Height;
                    break;
                case "Cut"://指定高宽裁减(不变形)               
                    if ((double)originalImage.Width / (double)originalImage.Height > (double)towidth / (double)toheight)
                    {
                        oh = originalImage.Height;
                        ow = originalImage.Height * towidth / toheight;
                        y = 0;
                        x = (originalImage.Width - ow) / 2;
                    }
                    else
                    {
                        ow = originalImage.Width;
                        oh = originalImage.Width * height / towidth;
                        x = 0;
                        y = (originalImage.Height - oh) / 2;
                    }
                    break;
                default:
                    break;
            }

            //新建一个bmp图片
            System.Drawing.Image bitmap = new System.Drawing.Bitmap(towidth, toheight);

            //新建一个画板
            System.Drawing.Graphics g = System.Drawing.Graphics.FromImage(bitmap);

            //设置高质量插值法
            g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.High;

            //设置高质量,低速度呈现平滑程度
            g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;

            //清空画布并以透明背景色填充
            g.Clear(System.Drawing.Color.Transparent);

            //在指定位置并且按指定大小绘制原图片的指定部分
            g.DrawImage(originalImage, new System.Drawing.Rectangle(0, 0, towidth, toheight),
                new System.Drawing.Rectangle(x, y, ow, oh),
                System.Drawing.GraphicsUnit.Pixel);

            try
            {
                //以jpg格式保存缩略图
                bitmap.Save(thumbnailPath, System.Drawing.Imaging.ImageFormat.Jpeg);
            }
            catch (System.Exception e)
            {
                throw e;
            }
            finally
            {
                originalImage.Dispose();
                bitmap.Dispose();
                g.Dispose();
            }
        }

        /**/
        /// 〈summary>
        /// 在图片上增加文字水印
        /// 〈/summary>
        /// 〈param name="Path">原服务器图片路径〈/param>
        /// 〈param name="Path_sy">生成的带文字水印的图片路径〈/param>
        protected void AddWater(string Path, string Path_sy)
        {
            string addText = "http://www.tzwhx.com/";
            System.Drawing.Image image = System.Drawing.Image.FromFile(Path);
            System.Drawing.Graphics g = System.Drawing.Graphics.FromImage(image);
            g.DrawImage(image, 0, 0, image.Width, image.Height);
            System.Drawing.Font f = new System.Drawing.Font("Verdana", 10);    //字体位置为左空10
            System.Drawing.Brush b = new System.Drawing.SolidBrush(System.Drawing.Color.Green);

            g.DrawString(addText, f, b, 14, 14);    //字体大小为14X14
            g.Dispose();

            image.Save(Path_sy);
            image.Dispose();
        }

        /**/
        /// 〈summary>
        /// 在图片上生成图片水印
        /// 〈/summary>
        /// 〈param name="Path">原服务器图片路径〈/param>
        /// 〈param name="Path_syp">生成的带图片水印的图片路径〈/param>
        /// 〈param name="Path_sypf">水印图片路径〈/param>
        protected void AddWaterPic(string Path, string Path_syp, string Path_sypf)
        {
            System.Drawing.Image image = System.Drawing.Image.FromFile(Path);
            System.Drawing.Image copyImage = System.Drawing.Image.FromFile(Path_sypf);
            System.Drawing.Graphics g = System.Drawing.Graphics.FromImage(image);
            g.DrawImage(copyImage, new System.Drawing.Rectangle(image.Width - copyImage.Width, image.Height - copyImage.Height, copyImage.Width, copyImage.Height), 0, 0, copyImage.Width, copyImage.Height, System.Drawing.GraphicsUnit.Pixel);
            g.Dispose();

            image.Save(Path_syp);
            image.Dispose();
        }

        protected void Button2_Click(object sender, EventArgs e)
        {
            //自动保存远程图片
            WebClient client = new WebClient();
            //备用Reg:〈img.*?src=([\"\'])(http:\/\/.+\.(jpg|gif|bmp|bnp))\1.*?>
            Regex reg = new Regex("IMG[^>]*?src\\s*=\\s*(?:\"(?〈1>[^\"]*)\"|'(?〈1>[^\']*)')", RegexOptions.IgnoreCase);
            MatchCollection m = reg.Matches(TextBox1.Text);

            foreach (Match math in m)
            {
                string imgUrl = math.Groups[1].Value;

                //在原图片名称前加YYMMDD重名名并上传

                Regex regName = new Regex(@"\w+.(?:jpg|gif|bmp|png)", RegexOptions.IgnoreCase);

                string strNewImgName = DateTime.Now.ToShortDateString().Replace("-", "") + regName.Match(imgUrl).ToString();

                try
                {
                    //保存图片
                    //client.DownloadFile(imgUrl, Server.MapPath("../ImageUpload/Auto/" + strNewImgName));
                   
                }
                catch
                {
                }
                finally
                {

                }

                client.Dispose();
            }

            Response.Write("〈script>alert('远程图片保存成功,保存路径为ImageUpload/auto')〈/script>");
        }
    }


        前台代码:

     〈%@ Page Language="C#" AutoEventWireup="true" CodeFile="ImagesAutoUpload.aspx.cs" Inherits="BackManagement_ImagesAutoUpload" %>

    〈!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 id="Head1" runat="server">
        〈title>自动上传图片并加文字水印〈/title>
    〈/head>
    〈body>
        〈form id="form1" runat="server" method="post" enctype="multipart/form-data">
        〈label for="pagebody1" style="display: none">
        〈/label>
        〈fieldset id="container">
            〈legend>上传图片并加文字水印〈/legend>
            〈div class="window" style="list-style: none;">
                〈div style="padding: 0px; 808px; height: 200px; float: left; margin-right: 0px;">
                    〈ul>
                        〈li style=" 150px; margin: 0px; padding: 0px; float: left;">
                            〈asp:Image ID="Image1" runat="server" Height="200px" BorderWidth="2px" Width="150px"
                                ImageUrl="~/images/Jpg/135X67/0_11_16.gif" />
                        〈/li>
                        〈li style=" 250px; margin: 0px;">
                            〈asp:ListBox ID="FileList" runat="server" Width="250px" Height="200px">〈/asp:ListBox>
                        〈/li>
                        〈li style=" 400px; margin: 0px; float: right;">
                            (1)图片将保存在你网站根目录〈asp:TextBox ID="TextBox3" runat="server">〈/asp:TextBox>中,你可以修改它,但建议你使用默认目录。〈br />
                            (2)上传图片保存在所建目录的子目录 /images下;缩略图在 /thumbnails下;文字水印图在 /textImages下;图形水印图在 /waterImages目录下。〈br />
                            (3)生成的缩略图的默认宽度和高度均为100px,你也可以修改它们,宽为: 〈asp:TextBox ID="TextBox4" runat="server" Width="54px">〈/asp:TextBox>高为:〈asp:TextBox
                                ID="TextBox5" runat="server" Width="56px">〈/asp:TextBox>〈br />
                            〈asp:CheckBox ID="CheckBox1" runat="server" Text="文字水印" />
                            〈asp:CheckBox ID="CheckBox2" runat="server" Text="图形水印" />
                                你可以选择是否生成水印图,默认不生成。 〈/li>
                    〈/ul>
                〈/div>
            〈/div>
            〈div>
                〈asp:FileUpload ID="FindFile" runat="server" Width="529px" />
            〈/div>
            〈div>
                〈asp:TextBox ID="TipInfo" runat="server" Width="400px">〈/asp:TextBox>
                〈asp:TextBox ID="TextBox1" runat="server" Width="400px">〈/asp:TextBox>
            〈/div>
            〈div>
                〈asp:Button ID="Upload" runat="server" Text="上  传" Style="height: 26px" OnClick="Upload_Click" />
                〈asp:Button ID="AddFile" runat="server" Text="添  加" OnClick="AddFile_Click1" />
                〈asp:Button ID="AddAllFile" runat="server" Text="全部添加" OnClick="AddAllFile_Click"
                    Enabled="False" />
                〈asp:Button ID="DelFile" runat="server" Text="删  除" OnClick="DelFile_Click1" />
                〈asp:Button ID="btnExit" runat="server" Text="完  成" />
            〈/div>
            〈div>
               
            〈/div>
        〈/fieldset>
        〈/form>
    〈/body>
    〈/html>
     

            另外,为解决大文件上传的限制,你必须在Web.config中加入以下代码。

     < system.web>

        < httpRuntime executionTimeout="90" maxRequestLength="20000" useFullyQualifiedRedirectUrl="false" requestLengthDiskThreshold="8192"/>

    < /system.web>

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  • 原文地址:https://www.cnblogs.com/maliya/p/1869103.html
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