在做一个信息管理平台时用到了图片，就像做一个上传的
正好用的是asp.net ajax
就试着做了一个
不很好
自定义用户控件文件 PicUpload.ascx
1<%@ control language="C#" autoeventwireup="true" inherits="Admin_PicUpload, App_Web_mboefw14" %>
2 <asp:Image ID="EP_Image" runat="server" Height="160px" ImageUrl='<%# Bind("EP_Pic") %>'
3 Width="314px" />
4<br />
5<asp:FileUpload ID="FileUpload1" runat="server" />
6<asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="上传" />
自定义用户控件文件 PicUpload.ascx.cs
1using System;
2using System.Data;
3using System.Configuration;
4using System.Collections;
5using System.Web;
6using System.Web.Security;
7using System.Web.UI;
8using System.Web.UI.WebControls;
9using System.Web.UI.WebControls.WebParts;
10using System.Web.UI.HtmlControls;
11
12public partial class Admin_PicUpload : System.Web.UI.UserControl
13{
14 protected void Page_Load(object sender, EventArgs e)
15 {
16
17 }
18 protected void Button1_Click(object sender, EventArgs e)
19 {
20 bool fileOK = false;
21 //获取根文件绝对路径
22 string path = Server.MapPath("~/UpLoad/");
23 //如上传了文件，就判断文件格式
24 FileUpload FU = FileUpload1;
25 if (FU.HasFile)
26 {
27 string fileExtension = System.IO.Path.GetExtension(FU.FileName).ToLower();
28 string[] allowedExtensions ={ ".gif", ".jpg", ".png", ".bmp", };
29 for (int i = 0; i < allowedExtensions.Length; i++)
30 {
31 if (fileExtension == allowedExtensions[i])
32 {
33 fileOK = true;
34 }
35 }
36 }
37 //调用saveas方法，实现上传文件
38 if (fileOK)
39 {
40 try
41 {
42 FileUpload1.SaveAs(path + System.DateTime.Now.ToString("yyyyMMddhhmmss")+FU.FileName);
43 EP_Image.ImageUrl = "../Upload/" + System.DateTime.Now.ToString("yyyyMMddhhmmss") + FU.FileName;
44 Button1.Text = "上传成功";
45 }
46 finally
47 {
48 }
49 }
50 else
51 {
52 Button1.Text = "上传失败，格式不允许";
53 }
54 }
55}
56
逐步完成...
http://www.cnblogs.com/zhiyyang/archive/2006/12/11/589020.html