ASP.NET文件处理如何操作_实用技巧_

<%@ Page Language="C#" AutoEventWireup="true"CodeFile="FileUpload.aspx.cs"Inherits="FileUpload" %>

 public partialclass FileUpload : System.Web.UI.Page { private string uploadDirectory;//文件保存路径字符串. protected void Page_Load(objectsender, EventArgs e) { //默认将文件保存在站点根文件下的Uploads中 uploadDirectory = Path.Combine(Request.PhysicalApplicationPath,"Uploads"); } //上传文件. protected void btnFileUpload_Click(objectsender, EventArgs e) { //判断是否有文件提交. if (myFileUpload.PostedFile.FileName== "") { lblInfo.Text = "提交的文件为空!请您选择要上传的文件!"; } else { //判断文件的大小是否超过200KB. if (myFileUpload.PostedFile.ContentLength> 204800) { lblInfo.Text = "文件不能超过200KB"; } else { //判断文件的类型. string extension = Path.GetExtension(myFileUpload.PostedFile.FileName); switch (extension.ToLower()) { case ".bmp": case ".gif": case ".jpg": break; default: lblInfo .Text ="文件类型不是 *.bmp |*.gif|*.jpg"; return ; } //将文件保存在web服务器中的我们定义的uploadDirectory变量的路径下. //文件名维持不变. string serverFileName= Path.GetFileName(myFileUpload.PostedFile.FileName); string fullUploadPath= Path.Combine(uploadDirectory,serverFileName); try { myFileUpload.PostedFile.SaveAs(fullUploadPath); //文件上传. lblInfo.Text = "文件:"+ serverFileName; lblInfo.Text += "成功上传到 "; lblInfo.Text += fullUploadPath; } catch (Exception e2) { lblInfo.Text = e2.Message;//上传文件出错信息. } } } } }