.net加水印2008-08-09 16:25前臺
<%@ 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>
<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="上傳並加文字水印"></asp:Button>
<asp:Button id="Button2" style="Z-INDEX: 103; LEFT: 352px; POSITION: absolute; TOP: 136px"
runat="server"
Text="上傳並加圖片水印"></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"></DIV>
<asp:Label id="Label1" style="Z-INDEX: 107; LEFT: 176px; POSITION: absolute; TOP: 40px"
runat="server">武漢凱凱</asp:Label>
</form>
</body>
</HTML>
後臺
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)
{
// 在此處放置用戶代碼以初始化頁面
if (!Page.IsPostBack)
{
Image1.ImageUrl = "aa.gif";
}
}
#region Web 窗體設計器生成的代碼
override protected void OnInit(EventArgs e)
{
//
// CODEGEN: 該調用是 ASP.NET Web 窗體設計器所必需的。
//
InitializeComponent();
base.OnInit(e);
}
/// <summary>
/// 設計器支持所需的方法 - 不要使用代碼編輯器修改
/// 此方法的內容。
/// </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() != "")
{
//上傳文件
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，這裏的代碼和以下加圖片水印的代碼不能共存
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 = "武漢凱凱";
g.DrawString(addText, f, b, 10, 10);
g.Dispose();
//保存加水印過後的圖片,刪除原始圖片
string newPath = Server.MapPath(".") + "/upload/" + fileName + "_new" + extension;
image.Save(newPath);
image.Dispose();
if (File.Exists(path))
{
File.Delete(path);
}
// Response.Redirect(newPath);
}
}
private void Button2_Click(object sender, System.EventArgs e)
{
//上傳文件
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);
//加圖片水印
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();
//保存加水印過後的圖片,刪除原始圖片
string newPath = Server.MapPath(".") + "/upload/" + fileName + "_new" + extension;
image.Save(newPath);
image.Dispose();
if (File.Exists(path))
{
File.Delete(path);
}
}
}
// Set the page's content type to JPEG files
// and clear all response headers.
Response.ContentType = "image/jpeg";
// set image name
//Response.AddHeader("Content-Disposition", "attachment; filename=a.jpg");
Response.Clear();
// Buffer response so that page is sent
// after processing is complete.
Response.BufferOutput = true;
// Create a bitmap and use it to create a
// Graphics object.
//Bitmap bmp = new Bitmap(
// width, height, PixelFormat.Format24bppRgb);
Bitmap bmp = new Bitmap(Server.MapPath("//bb//100_1216.JPG"));
System.Drawing.Bitmap bmp1 = new Bitmap(Server.MapPath("//bb//ni_png_0033.png"));
Graphics g = Graphics.FromImage(bmp);
//右下角
//g.DrawImage(bmp1, new Rectangle(bmp.Width - bmp1.Width, bmp.Height - bmp1.Height,
// bmp1.Width, bmp1.Height), 0, 0, bmp1.Width, bmp1.Height, GraphicsUnit.Pixel);
//中下
g.DrawImage(bmp1, new Rectangle(bmp.Width/2 + bmp1.Width/2, bmp.Height/4*3 + bmp1.Height/2,
bmp1.Width, bmp1.Height), 0, 0, bmp1.Width, bmp1.Height, GraphicsUnit.Pixel);
// Save the bitmap to the response stream and
// convert it to JPEG format.
bmp.Save(Response.OutputStream, ImageFormat.Jpeg);
// Release memory used by the Graphics object
// and the bitmap.
g.Dispose();
bmp.Dispose();
bmp1.Dispose();
// Send the output to the client.
Response.Flush();