ASP.NET多文件上传实例

时间:2023-12-11 15:27:08

在Web应用程序开发中,避免不了要用到上传文件这个功能,但以前上传文件是个很麻烦的事,现在有了.NET,文件上传变得轻而易举。下面的这个例子实现了多文件上传功能。可以动态添加输入表单,上传的文件数量没有限制。代码如下:

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="MultiFileUpload.aspx.cs"

Inherits="MultiFileUpload" %>

<!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>ASP.NET多文件上传测试</title>

<script type="text/javascript">

function addFile() {

var div = document.createElement("div");

var f = document.createElement("input");

f.setAttribute("type", "file")

f.setAttribute("name", "File")

f.setAttribute("size", "50")

div.appendChild(f)

var d = document.createElement("input");

d.setAttribute("type", "button")

d.setAttribute("onclick", "deteFile(this)");

d.setAttribute("value", "移除")

div.appendChild(d)

document.getElementById("_container").appendChild(div);

}

function deteFile(o) {

while (o.tagName != "DIV") o = o.parentNode;

o.parentNode.removeChild(o);

}

</script>

</head>

<body>

<form id="form1" runat="server" method="post" enctype="multipart/form-data">

<h3>多文件上传</h3>

用户名:<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>

<div id="_container">

<input type="file" size="50" name="File" />

</div>

<div>

<input type="button" value="添加文件(Add)" onclick="addFile()" />

</div>

<div style="padding:10px 0">

<asp:Button runat="server" Text="开始上传" ID="UploadButton"

onclick="UploadButton_Click"></asp:Button>

</div>

<div>

<asp:Label ID="strStatus" runat="server" Font-Names="宋体" Font-Bold="True" Font-Size="9pt"

Width="500px" BorderStyle="None" BorderColor="White"></asp:Label>

</div>

</form>

</body>

</html>

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Web.UI;

using System.Web.UI.WebControls;

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

{

protected void UploadButton_Click(object sender, EventArgs e)

{

///'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("您输入的用户名是:" + TextBox1.Text + "<br/>");

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();

}

catch (System.Exception Ex)

{

strStatus.Text = Ex.Message;

}

}

}