ASP.Net/Validation by Function/Number

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Checking the Range of a Number through the RangeValidator Control (VB.net)

   <source lang="csharp">

<%@ Page Language=VB Debug=true %> <HTML> <HEAD> <TITLE>Checking the Range of a Number through the RangeValidator Control</TITLE> </HEAD> <form runat="server">

Enter a Number:
<asp:textbox 

   id="txtNumber" 
   runat=server

/> <asp:rangevalidator 

   id="rngQuantity" 
   controltovalidate="txtNumber" 
   type="Integer" 
   minimumvalue=5
   maximumvalue=44
   display="Dynamic"
   font-name="Verdana"
   font-bold="True"
   font-size="10pt"
   forecolor="blue"
   runat="server">
   The Quantity field must be from 5 to 44!

</asp:rangevalidator>

<asp:button 

   id="butOK"
   text="OK"
   type="Submit"
   runat="server"

/> </form> </BODY> </HTML> 

      </source>


Comparing a Field to a Numeric Data Type using the CompareValidator Control (VB.net)

   <source lang="csharp">

<%@ Page Language=VB Debug=true %> <HTML> <HEAD> <TITLE>Comparing a Field to a Numeric Data Type using the CompareValidator Control</TITLE> </HEAD> <form runat="server">

Please enter a Whole Number:
<asp:textbox 

   id="txtNumber" 
   runat=server

/> <asp:comparevalidator 

   id="cvCheckNumber" 
   controltovalidate="txtNumber" 
   operator="DataTypeCheck" 
   type="Integer" 
   runat="server"

> 

   You must enter a whole number!

</asp:CompareValidator>

<asp:button 

   id="butOK"
   text="OK"
   type="Submit"
   runat="server"

/> </form> </BODY> </HTML> 

      </source>


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

   <source lang="csharp">

<%@ 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">

Enter a Positive, Even, Whole Number:
<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">
   
Incorrect answer please try again!

</asp:CustomValidator>

<asp:button 

   id="butOK"
   text="OK"
   type="Submit"
   runat="server"

/> </form> </BODY> </HTML> 

      </source>


Validation control:a postive whole number (VB.net)

   <source lang="csharp">

<%@ Page 

   Inherits="System.Web.UI.MobileControls.MobilePage" 
   Language="VB"

%> <%@ Register 

   TagPrefix="mobile" 
   Namespace="System.Web.UI.MobileControls" 
   Assembly="System.Web.Mobile"

%> <script runat="server" language="VB"> Sub OK_OnSubmit(Sender As Object, E As EventArgs) 

   If cvCheckNumber.IsValid Then
       ActiveForm = FinishForm
       lbl2.Text = "You entered " & txtNumber.Text
   End If

End Sub </script> <mobile:form 

   id="StartForm" 
   runat="server">
   <mobile:label 
       runat="server" 
       id="lbl1"
       Text="Enter a postive whole number:" 
   />
   <mobile:textbox
       runat="server" 
       id="txtNumber"
   />
   <mobile:comparevalidator 
       id="cvCheckNumber" 
       controltovalidate="txtNumber"
       valuetocompare=0
       operator="GreaterThan" 
       errormessage="You must enter a positive whole number!"
       type="Integer" 
       runat="server"
   />
   <mobile:Command 
       runat="server" 
       id="cmdOK"
       OnClick="OK_OnSubmit" 
       Text="OK" 
   />

</mobile:form> <mobile:form 

   id="FinishForm" 
   runat="server">
   <mobile:label 
       runat="server" 
       id="lbl2"
   />

</mobile:form> 

      </source>
Источник — «http://nfex.ru/index.php?title=ASP.Net/Validation_by_Function/Number&oldid=1537»