上传后立即显示图片以及urldecode

//程序名称：5-08.aspx.cs
//程序功能：5-08.aspx的后台功能代码
using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;

public partial class _5_08 : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
//Image控件不可见
Image1.Visible = false;
}
protected void Button1_Click(object sender, EventArgs e)
{
string strDir = FileUpload1.PostedFile.FileName;
int myPos = strDir.LastIndexOf("//");
string strName = strDir.Substring(myPos);
//得到后缀名
string strType = strName.Substring(strName.LastIndexOf(".") + 1);
string strPath = Server.MapPath(".") + strName;
//根据后缀名判断是否图片
if (strType == "jpg" || strType == "gif" || strType == "bmp" || strType

== "png")
{
FileUpload1.SaveAs(strPath);
//设置ImageUrl
Image1.ImageUrl = "~" + strName;///这里设置显示路径，html形成为 文件

名.jpg等，采用
///Server.urldecode来显示html内部文

件
//使Image控件可见
Image1.Visible = true;
Response.Write("图片上传成功");
}

}
}
protected void Page_Load(object sender, EventArgs e)
{
Response.Write(Server.UrlDecode("7%E8%BF%87.gif"));
}