.NET上传图片加文字和水印图片源码

复制下面代码,只需要在同级目录下建一个UPLOAD文件夹和一张LZ.JPG图片即可正常使用.

.aspx文件

<%@ Page language="c#" Codebehind="35cnnet.aspx.cs" AutoEventWireup="false" Inherits="uploadfiles.35cnnet" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" >
<HTML>
<HEAD>
<title>MikeCat_WaterMark</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">
<INPUT id="File1" style="Z-INDEX: 101; LEFT: 144px; WIDTH: 400px; POSITION: absolute; TOP: 88px;

HEIGHT: 22px"
type="file" size="47" name="File1" runat="server">
<asp:Button id="Button1" style="Z-INDEX: 102; LEFT: 176px; POSITION: absolute; TOP: 136px"

runat="server"
Text="上传并加文字水印"></asp:Button>
<asp:Button id="Button2" style="Z-INDEX: 103; LEFT: 352px; POSITION: absolute; TOP: 136px"

runat="server"
Text="上传并加图片水印"></asp:Button>
<asp:RequiredFieldValidator id="RequiredFieldValidator1" style="Z-INDEX: 104; LEFT: 552px; POSITION:

absolute; TOP: 88px"
runat="server" ErrorMessage="*" ControlToValidate="File1"></asp:RequiredFieldValidator>
<DIV style="Z-INDEX: 105; LEFT: 16px; WIDTH: 100%; POSITION: absolute; TOP: 168px; HEIGHT: 100px"
ms_positioning="GridLayout">
<asp:Image id="Image1" style="Z-INDEX: 107; LEFT: 56px; POSITION: absolute; TOP: 16px"

runat="server"
ImageAlign="Middle"></asp:Image></DIV>
<asp:Label id="Label1" style="Z-INDEX: 107; LEFT: 176px; POSITION: absolute; TOP: 40px"

runat="server">百分百设计－－上传图片并加入水印</asp:Label>
</form>
</body>
</HTML>

.cs文件

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;

namespace uploadfiles
{

public class 35cnnet : System.Web.UI.Page
{
protected System.Web.UI.WebControls.Button Button1;
protected System.Web.UI.HtmlControls.HtmlInputFile File1;
protected System.Web.UI.WebControls.Image Image1;
protected System.Web.UI.WebControls.RequiredFieldValidator RequiredFieldValidator1;
protected System.Web.UI.WebControls.Label Label1;
protected System.Web.UI.WebControls.Button Button2;

private void Page_Load(object sender, System.EventArgs e)
{
// 在此处放置用户代码以初始化页面
if(!Page.IsPostBack)
{
Image1.ImageUrl="aa.gif";
}
}

#region Web 窗体设计器生成的代码
override protected void OnInit(EventArgs e)
{
//
// CODEGEN: 该调用是 ASP.NET Web 窗体设计器所必需的。
//
InitializeComponent();
base.OnInit(e);
}

/// <summary>
/// 设计器支持所需的方法 - 不要使用代码编辑器修改
/// 此方法的内容。
/// </summary>
private void InitializeComponent()
{
this.Button1.Click += new System.EventHandler(this.Button1_Click);
this.Button2.Click += new System.EventHandler(this.Button2_Click);
this.Load += new System.EventHandler(this.Page_Load);

}
#endregion

private void Button1_Click(object sender, System.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 = "百分百设计";
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;
// Response.Redirect(newPath);
}

}

private void Button2_Click(object sender, System.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(".") + "/lz.jpg");
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(".") + "/upload/" + fileName + "_new" + extension;
image.Save(newPath);
image.Dispose();
if(File.Exists(path))
{
File.Delete(path);
}

Image1.ImageUrl=newPath;
}
}
}

摘自：http://www.studycs.com/html/523.html

posted on 2008-10-24 14:38 Jackey_Chen 阅读(1080) 评论(0) 编辑收藏举报