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>"); } }
ASP.NET使用文件上传控件上传图片,布布扣,bubuko.com
原文：http://www.cnblogs.com/sky-net/p/3841599.html