[转]最简单的图片上传显示代码

<%@ 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">

</head>

<body>

<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>

////////////////////////////////////////////////////////////////////////////////////////////////////////////

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";

}