Validating a Percentage Using the CustomValidator Control (VB.net) : By Your Function « Validation by Control « ASP.Net






  1. ASP.Net
  2. Validation by Control
  3. By Your Function

Validating a Percentage Using the CustomValidator Control (VB.net)

<%@ Page Language=VB Debug=true %>
<script runat=server>
Sub Answer_ServerValidation(source As object, E As ServerValidateEventArgs)
    Dim TheNumber as Single
    If Right(E.Value, 1) = "%" Then
        TheNumber = Left(E.Value, Len(E.Value) - 1)
        If TheNumber > 100 or TheNumber < 0 Then
            E.IsValid = False
        Else
            E.IsValid = True
        End If   
    Else
        E.IsValid = False
    End If
End Sub
</SCRIPT>
<HTML>
<HEAD>
<TITLE>Validating a Percentage Using the CustomValidator Control</TITLE>
</HEAD>
<form runat="server">
<BR><BR>
Enter a Percentage up to 100%:<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>








Related examples in the same category

1.Implement custom validation control event (VB.net)
2.Validate control in code behind in C#
3.Validate control manually in C#
4.Date validation: start, end date (C#)
5.Validate by a Server Validate function (VB.net)