asp.net ajax 和 asp.net 2.0中的fileupload合力打造无刷新文件上传控件

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http://www.cnblogs.com/zhiyyang/archive/2006/12/11/589020.html

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

<%@ control language="C#" autoeventwireup="true" inherits="Admin_PicUpload, App_Web_mboefw14" %>
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 <asp:Image ID="EP_Image" runat="server" Height="160px" ImageUrl='<%# Bind("EP_Pic") %>'
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Width="314px" />
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<br />
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<asp:FileUpload ID="FileUpload1" runat="server" />
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<asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="上传" />

自定义用户控件文件 PicUpload.ascx.cs

using System;
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using System.Data;
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using System.Configuration;
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using System.Collections;
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using System.Web;
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using System.Web.Security;
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using System.Web.UI;
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using System.Web.UI.WebControls;
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using System.Web.UI.WebControls.WebParts;
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using System.Web.UI.HtmlControls;
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public partial class Admin_PicUpload : System.Web.UI.UserControl
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{
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protected void Page_Load(object sender, EventArgs e)
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{
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}
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protected void Button1_Click(object sender, EventArgs e)
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{
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bool fileOK = false;
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//获取根文件绝对路径
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string path = Server.MapPath("~/UpLoad/");
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//如上传了文件，就判断文件格式
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FileUpload FU = FileUpload1;
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if (FU.HasFile)
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{
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string fileExtension = System.IO.Path.GetExtension(FU.FileName).ToLower();
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string[] allowedExtensions ={ ".gif", ".jpg", ".png", ".bmp", };
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for (int i = 0; i < allowedExtensions.Length; i++)
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{
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if (fileExtension == allowedExtensions[i])
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{
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fileOK = true;
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}
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}
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}
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//调用saveas方法，实现上传文件
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if (fileOK)
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{
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try
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{
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FileUpload1.SaveAs(path + System.DateTime.Now.ToString("yyyyMMddhhmmss")+FU.FileName);
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EP_Image.ImageUrl = "../Upload/" + System.DateTime.Now.ToString("yyyyMMddhhmmss") + FU.FileName;
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Button1.Text = "上传成功";
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}
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finally
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{
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}
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}
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else
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{
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Button1.Text = "上传失败，格式不允许";
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}
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}
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}
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逐步完成...