How to delete a file on the disk using ASP.NET 2.0 and VB .NET

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Deleting a file using ASP.NET 2.0 and VB .NET

ASP.NET File Tutorial

This tutorial will show you how to delete 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!

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

To delete a simple file on the disk, we will need to first import the System.IO namespace. The System.IO namespace contains the File.Delete() method and FileInfo type that we will use to perform our delete with.

Imports System.IO

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

When the btnSubmit_Click() event fires it first checks to see if the file exists using the FileInfo type. If it exists it runs the File.Delete() method to delete it, otherwise it throws a FileNotFoundException which is caught by one of the catch statements below the try block.

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

Try

Dim TheFile As FileInfo = New FileInfo(MapPath(".") & "\" & txtFile.Text)
If TheFile.Exists Then

File.Delete(MapPath(".") & "\" & txtFile.Text)

Else

Throw New FileNotFoundException()

End If

Catch ex As FileNotFoundException

lblStatus.Text += ex.Message

Catch ex As Exception

lblStatus.Text += ex.Message

End Try

End Sub

We have one textbox,a Submit button, a label, and a checkbox on the front end for user interaction. The front end .aspx page looks something like this:

<tr>

<td width="100" align="right" bgcolor="#eeeeee" class="header1"> File to Delete:</td>
<td align="center" bgcolor="#FFFFFF">
<asp:TextBox ID="txtFile" runat="server"></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 is 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 TheFile As FileInfo = New FileInfo(MapPath(".") & "\" & txtFile.Text)
If TheFile.Exists Then

File.Delete(MapPath(".") & "\" & txtFile.Text)

Else

Throw New FileNotFoundException()

End If

Catch ex As FileNotFoundException

lblStatus.Text += ex.Message

Catch ex As Exception

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!


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