ASP.NET+C#环境中FileUpload控件的使用方法

最新推荐文章于 2019-01-22 20:06:00 发布

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最新推荐文章于 2019-01-22 20:06:00 发布

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文章标签： c# ui

原文链接：http://www.cnblogs.com/singlex/archive/2011/10/05/2199632.html

本文将指导您如何在ASP.NET应用中实现图片上传功能，包括控件选择、代码实现及文件类型验证。

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本例是用该控件上传图片，上传其它附件依此类推

前台就随便拖一个FileUpload控件和一个button控件

1     <asp:FileUpload ID="FileUpload1" runat="server" /><br />
2     <asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="Button" />

后台

View Code

 1 using System;
 2 using System.Data;
 3 using System.Configuration;
 4 using System.Collections;
 5 using System.Web;
 6 using System.Web.Security;
 7 using System.Web.UI;
 8 using System.Web.UI.WebControls;
 9 using System.Web.UI.WebControls.WebParts;
10 using System.Web.UI.HtmlControls;
11 
12 public partial class Manage_News_upload : System.Web.UI.Page
13 {
14     protected void Page_Load(object sender, EventArgs e)
15     {
16 
17     }
18     protected void Button1_Click(object sender, EventArgs e)
19     {
20         if (FileUpload1.HasFile)
21         {
22             string fileExrensio = System.IO.Path.GetExtension(FileUpload1.FileName).ToLower();//ToLower转化为小写
23             string FileType = FileUpload1.PostedFile.ContentType;
24             string UploadURL = Server.MapPath("~/upload/");//上传的目录
25             if (FileType == "image/bmp" || FileType == "image/gif" || FileType == "image/jpeg" || FileType == "image/jpg" || FileType == "image/png")//判断文件类型
26             {
27 
28                 try
29                 {
30                     if (!System.IO.Directory.Exists(UploadURL))//判断文件夹是否已经存在
31                     {
32                         System.IO.Directory.CreateDirectory(UploadURL);//创建文件夹
33                     }
34 
35                     FileUpload1.PostedFile.SaveAs(UploadURL + FileUpload1.FileName);
36                 }
37                 catch 
38                 {
39                     Response .Write ("失败");
40                 }
41             }
42             else
43             {
44                 Response.Write("格式错误");
45             }
46         }
47         else 
48              Response.Write("请选择文件");
49     }
50 }