VB.NET - QueryString ? VB.NET - Asked By Eric Smith on 02-Nov-06 12:49 PM

I am trying to pass a value from txtSearch.Text in a web form named EditAptDetails.aspx  to another web form named  frmCreateAptForExistingClient.aspx, and then display the value being passed in the textbox named txtPhone.Text

Here is the code that I am using

' Pass value of txtSearch.text to another page
Response.Redirect("frmCreateAptForExistingClient.aspx?Parameter=" + txtSearch.Text)

'Receive value from another page and display in txtPhone.Text
Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load

System.NullReferenceException: Object reference not set to an instance of an object.

Source Error:

Line 26:     Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Line 27:         'Put user code to initialize the page here
Line 28:         txtPhone.Text = Request.QueryString("Parameter").ToString()
Line 29:     End Sub
Line 30: 

Try removing the ToString() part and see if the error goes away.  Also there is no need to call ToString() because QueryString will already return a string.

txtPhone.Text = Request.QueryString("Parameter")

 txtPhone.Text = Request("Parameter") 'Here try changing the name Parameter to "param" make sure to do this when you pass the variable too

Also make sure there is value in the txtSearch

responses, that the issue is that your txtSearch.Text property you are using to populate the value portion of the ?Parameter=  querystring value is null.  It is always a good idea to check for null before attempting to use a value anyway. It prevents exceptions, which are expensive to process and cause ugly yellow and red error pages. e.g.,

if Request.QueryString("Parameter") is not Nothing then
' rest of your code here that gets the value and uses it
end if

Suppose when he saw this on the screen shot he posted that he thought .net

was just lying to him???

Thanks for bringing a little sobriety to this thread.

to see the obvious, and take exception messages at face value.

if Request.("Parameter")<> Nothing then

      txtPhone.Text =Request.("Parameter")

end if