本文主要是介绍asp.net ajax 和 asp.net 2.0中的fileupload合力打造无刷新文件上传控件，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！
转自:http://www.cnblogs.com/zhiyyang/archive/2006/12/11/589020.html
自定义用户控件文件 PicUpload.ascx
1 
<% @ control language = " C# " autoeventwireup = " true " inherits = " Admin_PicUpload, App_Web_mboefw14 " %>
2 & nbsp; < 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 " />
<% @ control language = " C# " autoeventwireup = " true " inherits = " Admin_PicUpload, App_Web_mboefw14 " %> 2
& nbsp; < 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
1 using System;
2 using System.Data;
3 using System.Configuration;
4 using System.Collections;
5 using System.Web;
6 using System.Web.Security;
7 using System.Web.UI;
8 using System.Web.UI.WebControls;
9 using System.Web.UI.WebControls.WebParts;
10 using System.Web.UI.HtmlControls;
11
12 public 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
}
using System;2
using System.Data;3
using System.Configuration;4
using System.Collections;5
using System.Web;6
using System.Web.Security;7
using System.Web.UI;8
using System.Web.UI.WebControls;9
using System.Web.UI.WebControls.WebParts;10
using System.Web.UI.HtmlControls;11
12
public partial class Admin_PicUpload : System.Web.UI.UserControl13
{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
try41
{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
finally47
{48
}49
}50
else51
{52
Button1.Text = "上传失败，格式不允许";53
}54
}55
}
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