server side validation does not work?

Question

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XML

<asp:TextBox ID="txttodt" runat="server" BorderColor="#8F7591" BorderWidth="1px" CssClass="txtinput" BorderStyle="Solid" BackColor="#F4F4F4" onkeyup="KeyRemover(this)" onpaste="return false"></asp:TextBox>

<asp:CustomValidator id="cvtxttodt" runat="server" ControlToValidate="txttodt"  OnServerValidate ="Validatetxttodt" CssClass="Validation_Error" ErrorMessage="enter date" ForeColor="WhiteSmoke" ValidationGroup="NTST" />

<asp:Button ID="btnprtNTST" runat="server" Width="80px" Font-Bold="true" Text="Submit" ValidationGroup="NTST" CssClass="button" />

VB

Sub Validatetxttodt(ByVal sender As Object, ByVal args As ServerValidateEventArgs)
   Try
      If (txttodt.Text = "") Then
         args.IsValid = False
      Else
         args.IsValid = True
      End If

   Catch ex As Exception
      args.IsValid = False
   End Try
End Sub

not working ? control does not catch sub at debug time?

Posted 2-Jan-13 22:49pm

AdityaPratapSingh

Updated 2-Jan-13 22:55pm

phil.o

v2

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2 solutions

Solution 1

What is the value of txttodt.Text ?

You only test for equality to String.Empty. But what if txttodt.Text is Nothing ?

A better way would be :

VB

Sub Validatetxttodt(ByVal sender As Object, ByVal args As ServerValidateEventArgs)
   Try
      If (String.IsNullOrEmpty(txttodt.Text)) Then
         args.IsValid = False
      Else
         args.IsValid = True
      End If
   Catch ex As Exception
      args.IsValid = False
   End Try
End Sub

But it doesn't solve the problem of the Sub not being executed...

Posted 2-Jan-13 23:01pm

phil.o

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Aditya Magotra · Accepted Answer · 2013-01-02T23:15:00

Solution 2

hi,

Set property

C#

ValidateEmptyText="true"

for custom validator

Posted 2-Jan-13 23:15pm

Aditya Magotra