ASP.NET上传并加图片水印
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="edit.aspx.cs" Inherits="edit" %>
<!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>
<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" OnClick="Button1_Click1"></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" OnClick="Button2_Click"></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">上传图片并加入水印</asp:Label>
</div>
</form>
</body>
</html>
-----------------------------------------------------------------------------------------------------------
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;
using System.Drawing.Imaging;
public partial class edit : System.Web.UI.Page
{
protected void Page_Load(object sender, 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/";
File1.PostedFile.SaveAs(path + fileName + extension);
//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 + fileName + extension);
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 = "小徐设计";
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 + fileName + extension))
{
File.Delete(path + fileName + extension);
}
Image1.ImageUrl = newPath;
// Response.Redirect(newPath);
}
}
protected void Button2_Click(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/";
File1.PostedFile.SaveAs(path + fileName + extension);
//加图片水印
System.Drawing.Image image = System.Drawing.Image.FromFile(path + fileName + extension);
System.Drawing.Image copyImage = System.Drawing.Image.FromFile(Server.MapPath(".") + "/logo.gif");
ImageAttributes imageAttributes = new ImageAttributes();
ColorMap colorMap = new ColorMap();
colorMap.OldColor = Color.FromArgb(255, 0, 255, 0);
colorMap.NewColor = Color.FromArgb(0, 0, 0, 0);
ColorMap[] remapTable = { colorMap };
imageAttributes.SetRemapTable(remapTable,ColorAdjustType.Bitmap);
float[][] colorMatrixElements = {
new float[] {1.0f, 0.0f, 0.0f, 0.0f, 0.0f},
new float[] {0.0f, 1.0f, 0.0f, 0.0f, 0.0f},
new float[] {0.0f, 0.0f, 1.0f, 0.0f, 0.0f},
new float[] {0.0f, 0.0f, 0.0f, 0.3f, 0.0f},
new float[] {0.0f, 0.0f, 0.0f, 0.0f, 1.0f}
};
ColorMatrix wmColorMatrix = new ColorMatrix(colorMatrixElements);
imageAttributes.SetColorMatrix(wmColorMatrix, ColorMatrixFlag.Default, ColorAdjustType.Bitmap);
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, imageAttributes);
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 + fileName + extension))
{
File.Delete(path + fileName + extension);
}
Image1.ImageUrl=newPath;
}
}
浙公网安备 33010602011771号