Validating and Passing Data Back to the Server

The simple validation example uses a plain button control. If a Submit control was used, the example would never see the data to check it — everything would go immediately to the server. Avoiding the Submit control lets you check the data, but it doesn't submit the data to the server. That requires an additional line of code:

<SCRIPT LANGUAGE="VBScript"> 

<!--

Sub Button1_OnClick

 Dim TheForm

 Set TheForm = Document.ValidForm

 If IsNumeric(TheForm.Text1.Value) Then

    If TheForm.Text1.Value < 1 Or TheForm.Text1.Value > 10 Then

      MsgBox "Please enter a number between 1 and 10."

    Else

      MsgBox "Thank you."

      TheForm.Submit   ' Data correct; send to server.

    End If

 Else

    MsgBox "Please enter a numeric value."

 End If

End Sub

-->

</SCRIPT>

To send the data to the server, the code invokes the Submit method on the form object when the data is correct. From there, the server handles the data just as it otherwise would — except that the data is correct before it gets there.