图片加图片水印
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>无标题页</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:FileUpload ID="UploadFile" runat="server" />
<asp:Button ID="Button1" runat="server" onclick="Button1_Click" Text="Button" />
</div>
</form>
</body>
</html>
default.aspx.cs
using System;
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.Drawing;
using System.IO;
public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
protected void Button1_Click(object sender, EventArgs e)
{
if (UploadFile.PostedFile.FileName.Trim() != "")
{
//上传文件
string extension = Path.GetExtension(UploadFile.PostedFile.FileName).ToUpper();
string fileName = DateTime.Now.Year.ToString() + DateTime.Now.Month.ToString() + DateTime.Now.Day.ToString() + DateTime.Now.Hour.ToString() + DateTime.Now.Minute.ToString() + DateTime.Now.Second.ToString();
string path = Server.MapPath(".") + "/UploadFile/" + fileName + extension;
UploadFile.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", 32);
//Brush b = new SolidBrush(Color.White);
//string addText = AddText.Value.Trim();
//g.DrawString(addText, f, b, 10, 10);
//g.Dispose();
//加图片水印
System.Drawing.Image image = System.Drawing.Image.FromFile(path);
System.Drawing.Image copyImage = System.Drawing.Image.FromFile(Server.MapPath(".") + "/tp.gif");
Graphics g = Graphics.FromImage(image);
g.DrawImage(copyImage, new Rectangle(image.Width - copyImage.Width, image.Height - copyImage.Height, 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(".") + "/UploadFile/" + fileName + "_new" + extension;
image.Save(newPath);
image.Dispose();
if (File.Exists(path))
{
File.Delete(path);
}
// Response.Redirect(newPath);
Response.Redirect("default.aspx");
}
}
}
