Validating Against a Positive Even Whole Number using the CustomValidator Control (VB.net) : Number « Validation by Function « ASP.Net






  1. ASP.Net
  2. Validation by Function
  3. Number

Validating Against a Positive Even Whole Number using the CustomValidator Control (VB.net)

<%@ Page Language=VB Debug=true %>
<script runat=server>
Sub Answer_ServerValidation(source As object, E As ServerValidateEventArgs)
    If  E.Value = CLng(E.Value) Then
        If E.Value Mod 2 = 0 Then
            If E.Value > 0 Then
                E.IsValid = True
            Else
                E.IsValid = False
            End If
        Else
            E.IsValid = False
        End If
    Else
        E.IsValid = False
    End If
End Sub
</SCRIPT>
<HTML>
<HEAD>
<TITLE>Validating Against a Positive Even Whole Number using the CustomValidator Control</TITLE>
</HEAD>
<form runat="server">
<BR><BR>
Enter a Positive, Even, Whole Number:<BR>
<asp:textbox id="txtAnswer" runat=server />
<asp:customvalidator 
    id="custom9"
    controltovalidate="txtAnswer"
    OnServerValidate="Answer_ServerValidation"
    display="Dynamic"
    font-name="Verdana"
    font-bold="True"
    font-size="10pt"
    runat="server">
    <BR>Incorrect answer please try again!
</asp:CustomValidator>
<BR><BR>
<asp:button 
    id="butOK"
    text="OK"
    type="Submit"
    runat="server"
/>
</form>
</BODY>
</HTML>








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