asp.net文件上传

最新推荐文章于 2025-08-11 09:21:19 发布

oneroom

最新推荐文章于 2025-08-11 09:21:19 发布

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CC 4.0 BY-SA版权

文章标签： asp.net server xhtml object string path

本文链接：https://blog.youkuaiyun.com/oneroom/article/details/4963807

ContenLength:上传文件大小,单位:字节

FileName:文件名称

HasFile:是否选择了文件

<%@ 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" /><br />
<br />
<asp:Button ID="btnUpload" runat="server" OnClick="btnUpload_Click" Text="上传" /> </div>
</form>
</body>
<ml>

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 _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{

}
protected void btnUpload_Click(object sender, EventArgs e)
{
Boolean fileOk = false;
string path = Server.MapPath("~/upload/");
//判断是否已经选取文件
if (FileUpload1.HasFile)
{
//取得文件的扩展名,并转换成小写
string fileExtension = System.IO.Path.GetExtension(FileUpload1.FileName).ToLower();
//限定只能上传jpg和gif图片
string[] allowExtension = { ".jpg", ".gif" };
//对上传的文件的类型进行一个个匹对
for (int i = 0; i < allowExtension.Length; i++)
{
if (fileExtension == allowExtension[i])
{
fileOk = true;
break;
}
}
//对上传文件的大小进行检测，限定文件最大不超过1M
if (FileUpload1.PostedFile.ContentLength > 1024000)
{
fileOk = false;
}
//最后的结果
if (fileOk)
{
try
{
FileUpload1.PostedFile.SaveAs(path + FileUpload1.FileName);
Response.Write("<script type='text/javascript'>window.alert('上传成功')</script>");
}
catch
{
Response.Write("<script type='text/javascript'>window.alert('上传失败')</script>");
}
}
else
{
Response.Write("<script type='text/ja