Event does not wire up in aspx page

Nepethya Rana

I have dynamically created Tree Node and child nodes in my asp.net web application.
I haved added SelectedNodeChanged event via properties on my child nodes. I run my application but the event did not fire. When i looked back
I could see that changed event has been added in aspx file.

aspx page with page directive Codebehind="Default.aspx.vb"

Code Behind:

Protected Sub SampleTreeView_SelectedNodeChanged(sender As Object, e As EventArgs) Handles SampleTreeView.SelectedNodeChanged

Dim filePath As String = SampleTreeView.SelectedValue

// Some code

End Sub

3 Replies

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Nepethya Rana8y ago
This is my code in changed event. I did not post there for simplicity.

Protected Sub SampleTreeView_SelectedNodeChanged(sender As Object, e As EventArgs) Handles SampleTreeView.SelectedNodeChanged

Try
Dim filePath As String = SampleTreeView.SelectedValue

If File.Exists(filePath) Then
Response.ContentType = "application/pdf"
Response.AddHeader("Content-Disposition", [String].Format("attachment;filename=""{0}""", filePath))
Response.TransmitFile(filePath)
Response.Flush()
Else
HttpContext.Current.Response.StatusCode = 404
HttpContext.Current.Response.Flush()
End If

Catch ex As Exception
HttpContext.Current.Response.StatusCode = 404
HttpContext.Current.Response.Flush()
Throw
End Try

End Sub

<%@ Page Language="VB" AutoEventWireup="false" Inherits="SamleApp._Default" Codebehind="Default.aspx.vb" %>
In aspx page directive it is declared as :
Nilesh Shah8y ago
where is your code then?

you said in your question

Code Behind:
Protected Sub SampleTreeView_SelectedNodeChanged(sender As Object, e As EventArgs) Handles SampleTreeView.SelectedNodeChanged
Dim filePath As String = SampleTreeView.SelectedValue
// Some code
End Sub

what is that?
Nilesh Shah8y ago
your this line:

needs to be changed to: