<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.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 runat="server"> <title>无标题页</title></head><body> <form id="form1" runat="server"> <div> <asp:FileUpload ID="FileUpload1" runat="server" /> <asp:Button ID="Button1" runat="server" Text="上传" OnClick="Button1_Click" /></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) { if (FileUpload1.HasFile) { string FileName = FileUpload1.FileName; //取得文件类型 string strFileExtend = FileName.Substring(FileName.LastIndexOf(".")+1); string[] NoFileExtend ={ "exe","php","asp"}; bool Flag = true; for (int i = 0; i < NoFileExtend.Length; i++) { if (strFileExtend.Equals(NoFileExtend[i])) { Flag = false; } } if (Flag) { string strFilePath = string.Format("files/{0}.{1}", DateTime.Now.ToString("mmhhddss"), strFileExtend); string path = Server.MapPath(strFilePath); FileUpload1.SaveAs(path); Page.ClientScript.RegisterStartupScript(this.GetType(), "Startup", "<script>alert('文件上传成功');</script>"); Response.Write("格式化后的地址为："+strFilePath+"文件类型为："+strFileExtend); } else { Page.ClientScript.RegisterStartupScript(this.GetType(), "Startup", "<script>alert('" + string.Format("不能上传{0}格式文件", strFileExtend) + "');</script>"); } } else { Page.ClientScript.RegisterStartupScript(this.GetType(),"Startup","<script>alert('文件不能为空');</script>"); } }
}