confirm box doesn't work in ascx

[atiger]

I am doing some validation in an ascx page. I have two textboxes. if user types char in the box, an alert box will be displayed, if user doesn't enter anything, a confirm box need to be displayed. Alert box works now, but confirm box doesn't work. my code:

Protected Sub btnContinue_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnContinue.Click        
 
If (textbox1.text <> "" And Not Regex.IsMatch(textbox1.text, "^\d+$")) Then
            'display alert message here
...
else 
   '  add data to table
 End if
 
in page_load 
 
Dim strScript As New StringBuilder
 
            strScript.Append("<script language=javascript>function confirmbox() ")
            strScript.Append(" { ")
            strScript.Append("if (document.getElementById(" & Me.textbox1.ClientID & ").value == '' ) ")
            strScript.Append("   return confirm('This is a confirmbox');   ")
            strScript.Append("        else ")
            strScript.Append(" return true;  ")
            strScript.Append("} ")
            strScript.Append(" </script>")
 
            Dim clientScript As ClientScriptManager = Me.Page.ClientScript
            If (Not clientScript.IsStartupScriptRegistered("qKey")) Then
                clientScript.RegisterStartupScript(Me.Page.GetType(), "qKey", strScript.ToString)
              End If
 
 btnContinue.Attributes.Add("onclick", "return confirmbox();")

Please help. Thanks a lot

[nateraaaa]

Try adding the Attribute for btnContinue in the Page_Load of your user control.

Nathan

[atiger]

Yes, I am having the button attributes in Page_load, the following code doesn't work, anything wrong?

Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
If (Not Page.IsPostBack) Then
If Me.textbox1.Text Is Nothing Or Me.textbox1.Text = "" Then
btnContinue.Attributes.Add("onclick", "return confirm(' message 1 ');")

ElseIf Me.textbox2.Text Is Nothing Or Me.textbox2.Text = "" Then
btnContinue.Attributes.Add("onclick", "return confirm(' message 2');")
ElseIf Me.textbox2.Text = "0" Then
btnContinue.Attributes.Add("onclick", "return confirm(' message 3' );")

End If
End If

[nateraaaa]

Do you have a runat="server" tag on your btnContinue button?

Nathan