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asp.net(c#)实现文件上传功能

2008-09-05 16:30 996 查看
UpLoad.aspx

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="UpLoad.aspx.cs" Inherits="WEB_Test_UpLoad" %>

<!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>多文件上传 </title>
<script language="JavaScript">
function addFile()
{
var str = ' <INPUT type="file" size="50" NAME="File">'
document.getElementById('MyFile').insertAdjacentHTML("beforeEnd",str)
}
</script>
</HEAD>
<body>
<form id="form1" method="post" runat="server" enctype="multipart/form-data">
<div align="center">
<h3>多文件上传 </h3>
<P id="MyFile"> <INPUT type="file" size="50" NAME="File"> </P>
<P>
<input type="button" value="增加(Add)" onclick="addFile()">
<input onclick="this.form.reset()" type="button" value="重置(ReSet)">
<asp:Button Runat="server" Text="开始上传" ID="UploadButton"> </asp:Button>
</P>
<P>
<asp:Label id="strStatus" runat="server" Font-Names="宋体" Font-Bold="True" Font-Size="9pt"
Width="500px" BorderStyle="None" BorderColor="White"> </asp:Label>
</P>
</div>
</form>

</body>
</html>

UpLoad.aspx.cs

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 WEB_Test_UpLoad : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
/// 在此处放置用户代码以初始化页面
if (this.IsPostBack) this.SaveImages();

}
private Boolean SaveImages()
{
///'遍历File表单元素
HttpFileCollection files = HttpContext.Current.Request.Files;

/// '状态信息
System.Text.StringBuilder strMsg = new System.Text.StringBuilder();
strMsg.Append("上传的文件分别是: <hr color=red>");
try
{
for(int iFile = 0; iFile < files.Count; iFile++)
{
///'检查文件扩展名字
HttpPostedFile postedFile = files[iFile];
string fileName, fileExtension;
fileName = System.IO.Path.GetFileName(postedFile.FileName);
if (fileName != "")
{
fileExtension = System.IO.Path.GetExtension(fileName);
strMsg.Append("上传的文件类型:" + postedFile.ContentType.ToString() + " <br>");
strMsg.Append("客户端文件地址:" + postedFile.FileName + " <br>");
strMsg.Append("上传文件的文件名:" + fileName + " <br>");
strMsg.Append("上传文件的扩展名:" + fileExtension + " <br> <hr>");
///'可根据扩展名字的不同保存到不同的文件夹
///注意:可能要修改你的文件夹的匿名写入权限。
postedFile.SaveAs(System.Web.HttpContext.Current.Request.MapPath("images/") + fileName);
}
}
strStatus.Text = strMsg.ToString();
return true;
}
catch(System.Exception Ex)
{
strStatus.Text = Ex.Message;
return false;
}
}

}
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