个人学习代码保存:例6.多文件上传

前台代码：Default.aspx 注意：一定要在<form id="form1" runat="server" enctype="multipart/form-data">

<%@ 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">

function AddFile()

{

var strFile='<input name="File1" type="file" /><br />';

document.getElementById("DivFile").insertAdjacentHTML("beforeEnd",strFile);

}

</script>

</head>

<body>

<div>

</div>

<asp:Button ID="Button1" runat="server" Text="上传" OnClick="Button1_Click" /><br />

</div>

</form>

</body>

</html>

后台代码：Default.aspx.cs

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;

using System.IO;

using System.Text;

public partial class _Default : System.Web.UI.Page

{

protected void Page_Load(object sender, EventArgs e)

{

}

protected void Button1_Click(object sender, EventArgs e)

{

//这是第一种写法了

////定义上传文件的列表

//HttpFileCollection fileList = HttpContext.Current.Request.Files;

////存放上传文件的操作信息

//StringBuilder strMessage = new StringBuilder("当前上传的文件分别是:<hr color=red>");

//try

//{

// //上传文件列表中的每一个文件

// for (int i = 0; i < fileList.Count; i++)

// {

// //取得当前上传的文件

// HttpPostedFile postedFile = fileList[i];

// string fileName;

// string fileExtension;

// //获取上传文件的文件名

// if (postedFile.ContentLength > 0)

// {

// fileName = Path.GetFileName(postedFile.FileName);

// fileExtension = Path.GetExtension(fileName);

// strMessage.Append("上传文件类型：" + postedFile.ContentType.ToString() + "<br />");

// strMessage.Append("客户端文件地址：" + postedFile.FileName + "<br/>");

// strMessage.Append("上传文件的文件名：" + fileName + "<br/>");

// strMessage.Append("上传文件的扩展名：" + fileExtension + "<br/></hr>");

// string path = Server.MapPath("files\\") + fileName;

// postedFile.SaveAs(path);

// Response.Write(strMessage.ToString());

// }

// else

// {

// Response.Write("不能上传空文件");

// }

//}

//catch (Exception ex)

//{

// throw ex;

//}

StringBuilder strMessage = new StringBuilder();

HttpFileCollection fileList = HttpContext.Current.Request.Files;

for (int i = 0; i < fileList.Count; i++)

{

HttpPostedFile postedFile = fileList[i];

if (postedFile.ContentLength > 0)

{

string FileName = postedFile.FileName;

string FileExtension = FileName.Substring(FileName.LastIndexOf(".") + 1);

string[] NoFileExtension = { "exe", "asp", "php" };

bool IsUp = true;

for (int j = 0; j < NoFileExtension.Length; j++)

{

if (FileExtension.Equals(NoFileExtension[j]))

{

IsUp = false;

}

if (IsUp)

{

//循环时在文件名后面加变量i，防止同时传相同类型的文件时，后一个文件覆盖前一个文件

string sFilePath = string.Format("files/{0}.{1}", DateTime.Now.ToString("mmhhddss")+i, FileExtension);

postedFile.SaveAs(Server.MapPath(sFilePath));

strMessage.Append("文件上传成功！");

strMessage.Append(string.Format("{0}.{1}", DateTime.Now.ToString("mmhhddss")+i, FileExtension));

strMessage.Append("<br />");

strMessage.Append("文件的格式：");

strMessage.Append(FileExtension+"<br />");

strMessage.Append("<br />```````````````<br />");

Response.Write("文件上传成功！" + "<br />文件名是：" + string.Format("{0}.{1}", DateTime.Now.ToString("mmhhddss")+i, FileExtension) + "<br />文件的格式：" + FileExtension);

}

else

{

Response.Write(string.Format("不允许上传{0}格式文件", FileExtension));

}

else

{

Response.Write("不能上传空文件");

}

posted on 2008-01-13 03:26 wangbin 阅读(290) 评论(0) 收藏举报