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ASP.NET使用文件上传控件上传图片

2024-07-11 22:25:03   224人阅读

ASPX代码<%@ 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>上传图片</title>  </head>  <body>      <form id="form1" runat="server">      <div>              <asp:FileUpload ID="FileUpload1" runat="server" />          <asp:Button ID="btnFileUpload" runat="server" Text="上传"               onclick="btnFileUpload_Click" />      </div>      </form>  </body>  </html>

 

CS代码using System;
using System.Configuration;  using System.Data;  using System.Linq;  using System.Web;  using System.Web.Security;  using System.Web.UI;  using System.Web.UI.HtmlControls;  using System.Web.UI.WebControls;  using System.Web.UI.WebControls.WebParts;  using System.Xml.Linq;    public partial class _Default : System.Web.UI.Page   {      protected void Page_Load(object sender, EventArgs e)      {        }      protected void btnFileUpload_Click(object sender, EventArgs e)      {          Boolean fileOK = false;          //获取上传的文件名          string fileName = this.FileUpload1.FileName;          //获取物理路径          String path = Server.MapPath("~/Images/");          //判断上传控件是否上传文件          if (FileUpload1.HasFile)          {              //判断上传文件的扩展名是否为允许的扩展名".gif", ".png", ".jpeg", ".jpg" ,".bmp"              String fileExtension = System.IO.Path.GetExtension(fileName).ToLower();              String[] Extensions = { ".gif", ".png", ".jpeg", ".jpg" ,".bmp"};              for (int i = 0; i < Extensions.Length; i++)              {                  if (fileExtension == Extensions[i])                  {                      fileOK = true;                  }              }          }          //如果上传文件扩展名为允许的扩展名，则将文件保存在服务器上指定的目录中          if (fileOK)          {              try              {                  this.FileUpload1.PostedFile.SaveAs(path + fileName);                  MessageBox( "文件上传完毕");              }              catch (Exception ex)              {                 MessageBox("文件不能上传，原因：" + ex.Message);              }          }          else          {              MessageBox( "不能上传这种类型的文件");          }      }        protected void MessageBox(string str)      {          Page.ClientScript.RegisterStartupScript(Page.GetType(), "message", "<script language=‘javascript‘ defer>alert(‘"+str+"‘);</script>");       }  }

 


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