How to perform a File Upload using ASP.NET 2.0 and VB.NET

Categories

Advanced Technologies

User Interface and Themes

Navigator: Home - Tutorials - File - Writing a file to disk using ASP.NET 2.0 and VB .NET

Writing a file to disk using ASP.NET 2.0 and VB .NET

ASP.NET File Tutorial

This tutorial will show you how to write to a file on the disk using ASP.NET 2.0 and VB.NET

Download the Full Working Version of this Project written with Visual Studio.NET VB.NET 2005 Here!

Looking for the C#.NET 2005 Version? Click Here!

Looking for more ASP.NET Tutorials? Click Here!

The .NET Framework offers a number of types that makes accessing resources on filesystems easy to use.

To write a simple file to the disk, we will need to first import the System.IO namespace. The System.IO namespace contains the StreamWriter type that we will use to perform our disk write.

Imports System.IO

We'll put our code in the btnSubmit_Click() event.

When the btnSubmit_Click() event fires it executes the File.CreateText method with a parameter specifying the path and name of the file which we would like to write to, it also returns a StreamWriter object instance which we then execute the WriteLine and Close methods on.

Protected Sub btnSubmit_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnSubmit.Click

Try
Dim sw As StreamWriter = File.CreateText(MapPath("myFile.txt"))
sw.WriteLine(txtFile.Text)
sw.Close()
Catch ex As IOException

lblStatus.Text += ex.Message

End Try

End Sub

The front end Default.aspx page looks something like this:

<tr>

<td width="100" align="right" bgcolor="#eeeeee" class="header1"> File Content:</td>
<td align="center" bgcolor="#FFFFFF">
<asp:TextBox ID="txtFile" runat="server" TextMode="MultiLine"></asp:TextBox><br />
<asp:Button ID="btnSubmit" runat="server" Text="Submit" OnClick="btnSubmit_Click" /><br />  
<asp:label ID="lblStatus" runat="server"></asp:label></td>

</tr>

</table>

The flow for the code behind page as follows.

Imports System.IO
Partial Class _Default

Inherits System.Web.UI.Page

Protected Sub btnSubmit_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnSubmit.Click

Try
Dim sw As StreamWriter = File.CreateText(MapPath("myFile.txt"))
sw.WriteLine(txtFile.Text)
sw.Close()
Catch ex As IOException

lblStatus.Text += ex.Message

End Try

End Sub

Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load

End Sub
End Class

Download the Full Working Version of this Project written with Visual Studio.NET VB.NET 2005 Here!

Looking for the C#.NET 2005 Version? Click Here!

Looking for more ASP.NET Tutorials? Click Here!


Developer Resources