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给上传的图片加上一个水印
UpImage.aspx
<%@ Page language="c#" Codebehind="UpImage.aspx.cs" AutoEventWireup="false" Inherits="Sand.WebForm4" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" >
<HTML>
<HEAD>
<title>WebForm4</title>
<meta name="GENERATOR" Content="Microsoft Visual Studio .NET 7.1">
<meta name="CODE_LANGUAGE" Content="C#">
<meta name="vs_defaultClientScript" content="JavaScript">
<meta name="vs_targetSchema" content="http://schemas.microsoft.com/intellisense/ie5">
</HEAD>
<body MS_POSITIONING="GridLayout">
<form id="Form1" method="post" runat="server">
<FONT face="宋体"><INPUT id="UpFile" style="Z-INDEX: 101; LEFT: 256px; POSITION: absolute; TOP: 152px" type="file"
runat="server"><INPUT id="Submit_File" style="Z-INDEX: 102; LEFT: 504px; POSITION: absolute; TOP: 152px"
type="button" value="上传" name="Button1" runat="server"></FONT>
</form>
</body>
</HTML>
UpImage.aspx.cs
private void Button1_ServerClick(object sender, System.EventArgs e)
![](/Images/OutliningIndicators/ExpandedBlockStart.gif)
{
//上传文件
string UpFileName = UpFile.PostedFile.FileName.Substring(UpFile.PostedFile.FileName.LastIndexOf("\\"),UpFile.PostedFile.FileName.Length - UpFile.PostedFile.FileName.LastIndexOf("\\"));
UpFile.PostedFile.SaveAs(Server.MapPath("Images\\" + UpFileName));
//给上传的文件添加水印
System.Drawing.Image YImage = System.Drawing.Image.FromFile(Server.MapPath("Images\\" + UpFileName));//获取要添加水印的图片
System.Drawing.Image SYImage = System.Drawing.Image.FromFile(Server.MapPath("Images\\shiyin.png"));//获取水印的图片
System.Drawing.Graphics G = System.Drawing.Graphics.FromImage(YImage);
G.DrawImage(SYImage,new System.Drawing.Rectangle(new System.Drawing.Point(0,0),new System.Drawing.Size(SYImage.Width,SYImage.Height)),5,9,SYImage.Width,SYImage.Height,System.Drawing.GraphicsUnit.Pixel);
YImage.Save(Server.MapPath("Images\\sss.jpg"));
G.Dispose();
G = null;
SYImage.Dispose();
SYImage = null;
YImage.Dispose();
YImage = null;
}
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原文地址:https://www.cnblogs.com/Sandheart/p/94834.html
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