Default.aspx
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_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>Upload ...</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<INPUT id="File1" type="file" size="47" name="File1" runat="server"><br />
<asp:Button id="Button1" runat="server" Text="上传并加文字水印" OnClick="Button1_Click1"></asp:Button>
<asp:Button id="Button2" runat="server" Text="上传并加图片水印" OnClick="Button2_Click1"></asp:Button>
<asp:RequiredFieldValidator id="RequiredFieldValidator1" runat="server" ErrorMessage="*" ControlToValidate="File1"></asp:RequiredFieldValidator>
<br />
<asp:Image id="Image1" runat="server" ImageAlign="Middle"></asp:Image>
</div>
</form>
</body>
</html>
Default.aspx.cs
using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
using System.IO;
public partial class _Default : System.Web.UI.Page
{
private void Page_Load(object sender, System.EventArgs e)
{
}
protected void Button1_Click1(object sender, EventArgs e)
{
if (File1.PostedFile.FileName.Trim() != "")
{
//上传文件
string extension = Path.GetExtension(File1.PostedFile.FileName).ToLower();
string fileName = DateTime.Now.ToString("yyyyMMddhhmmss");
string path = Server.MapPath(".") + "/upload/" + fileName + extension;
File1.PostedFile.SaveAs(path);
//加文字水印，注意，这里的代码和以下加图片水印的代码不能共存
System.Drawing.Image image = System.Drawing.Image.FromFile(path);
Graphics g = Graphics.FromImage(image);
g.DrawImage(image, 0, 0, image.Width, image.Height);
Font f = new Font("Verdana", 16);
Brush b = new SolidBrush(Color.Blue);
string addText = "中国114黄页";
g.DrawString(addText, f, b, 10, 10);
g.Dispose();
//保存加水印过后的图片,删除原始图片
string newPath = Server.MapPath(".") + "/upload/" + fileName + "_new" + extension;
image.Save(newPath);
image.Dispose();
if (File.Exists(path))
{
File.Delete(path);
}
Image1.ImageUrl = newPath;
}
}
protected void Button2_Click1(object sender, EventArgs e)
{
//上传文件
string extension = Path.GetExtension(File1.PostedFile.FileName).ToUpper();
string fileName = DateTime.Now.ToString("yyyyMMddhhmmss");
string path = Server.MapPath(".") + "/upload/" + fileName + extension;
File1.PostedFile.SaveAs(path);
//加图片水印
System.Drawing.Image image = System.Drawing.Image.FromFile(path);
System.Drawing.Image copyImage = System.Drawing.Image.FromFile(Server.MapPath(".") + "/tm.jpg");
Graphics g = Graphics.FromImage(image);
g.DrawImage(copyImage, new Rectangle((image.Width - copyImage.Width) / 2, (image.Height - copyImage.Height) / 2,
copyImage.Width, copyImage.Height), 0, 0, copyImage.Width, copyImage.Height, GraphicsUnit.Pixel);
g.Dispose();
//保存加水印过后的图片,删除原始图片
string newPath = Server.MapPath(".") + "/upload/" + fileName + "_new" + extension;
image.Save(newPath);
image.Dispose();
if (File.Exists(path))
{
File.Delete(path);
}
Image1.ImageUrl = newPath;
}
}