最简单的图片上传显示代码（C#.net 2.0保存文件不会重名）

<%@ Page Language="C#" AutoEventWireup="true"  CodeFile="up.aspx.cs" Inherits="_Default" %>
<!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 id="Head1" runat="server">
<title>up</title>
</head>
<body>
<form id="form1" runat="server">
<div>
      <asp:FileUpload ID="FileUpload1" runat="server" />
      <asp:Button ID="Button1" runat="server" Text="Upload" OnClick="Button1_Click" /><br />
      <asp:Label ID="Label1" runat="server"></asp:Label><br />
      <asp:Image ID="Image1" runat="server" /></div>
</form>
</body>
</html>

QUOTE:

using System;
using System.Data;
using System.Configuration;
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 _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{

}
protected void Button1_Click(object sender, EventArgs e)
{
      string fullname = FileUpload1.FileName.ToString();
      string fn = DateTime.Now.ToString("yyyyMMddHHmmss") + fullname;
      string typ2 = fullname.Substring(fullname.LastIndexOf(".")+1);
      string size=FileUpload1.PostedFile.ContentLength.ToString();

      if (typ2 == "gif" || typ2 == "jpg" || typ2 == "bmp" || typ2 == "png")
      {
         FileUpload1.SaveAs(Server.MapPath("up")+"\\"+fn);          //将文件保存在跟目录的UP文件夹下
         Label1.Text = (fn);
         Image1.ImageUrl = (Server.MapPath("up") + "\\" + fn);
      }
      else
      {
         Label1.Text = "文件类型不支持";
      }
}
}

要保存到数据库
稍微修改一下就可以了:(

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