调用C＃函数立即文件文件上传选择 [英] calling C# function immediately file is selected in fileupload

问题描述

我有我使用上传文件，网页表单（asp.net）。在目前的情况下，如果用户选择从他的电脑的文本文件，他有点击一个按钮移到在一个盒子里上传thetext。我试图找到一种方式来跳过一个按钮pressing的步骤。

I have a web form(asp.net) which I'm using to upload file. In current situation if a user choose an text file from his computer he has to click a buttton to upload thetext in a box. I'm trying to find a way to skip the step with a button pressing.

当从用户选择的文件如何调用C＃功能？

How to call a C# function when the file is selected from user ?

推荐答案

试试这个

  <asp:FileUpload ID="FileUpload01" ClientIDMode="Static" onchange="this.form.submit()"   runat="server"/>

在后面的Page_Load事件code

in code behind Page_load event

if (IsPostBack && FileUpload01.PostedFile != null)
{
   if (FileUpload01.PostedFile.FileName.Length > 0)
   {    
       FileUpload01.SaveAs(Server.MapPath("~/Images/") + FileUpload01.PostedFile.FileName);   
       imguser.ImageUrl = "~/Images/" + FileUpload01.PostedFile.FileName;
    }
 }

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