In this article, I am going to show how we can upload a file. Here I am uploading a .txt file and saving it in a predefined location. Let see this by a simple programme. Here I am using an input tag highlighted with yellow colour for browsing the uploaded file.
The fileupload.aspx code is:
<%@ 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>File Upload Demostration</title>
</head>
<body>
<form id="Form1" method="post" runat="server">
<table cellpadding="0" cellspacing="0" width="80%" align="center" border="4">
<tr><td height="20px"></td></tr>
<tr><td height="200px" align="center" valign="middle">
<input id="MyFile" type="file" size="81" name="File1" runat="server" />
<br /><br />
<asp:Button id="btnSubmit" runat="server" Text="Submit" Width="139px" Height="30px" OnClick="btnSubmit_Click"></asp:Button>
<asp:Label id="lbl" runat="server" Width="402px" Height="33px"></asp:Label>
</td></tr></table>
</form>
</body>
</html>
The fileupload.aspx.cs is:
using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
protected void btnSubmit_Click(object sender, EventArgs e)
{
if (MyFile.PostedFile.ContentLength == 0)
{
lbl.Text = "Cannot upload zero length file";
return;
}
lbl.Text = MyFile.PostedFile.FileName;
MyFile.PostedFile.SaveAs("c:\\UploadFile\\MyFile.PostedFile.FileName");
}
}
When user run the application then the window will look like this:
Figure 1.
When user click on Browse button:
Figure 2.
After selecting the file the window will look like this:
Figure 3.
When user click on submit button.
Figure 4. The uploaded file will save in the directory specified as the destination path in .cs file.