Custom server side validation in ASP.NET + VB.NET

Question

This has not happened to me before, but for some reason server side validation events are not being triggered: I'm using Code below

<asp:CustomValidator runat="server" id="RefId" OnServerValidate="Ref_Id" ControlToValidate="txtRefId" ErrorMessage="Referral ID is Required." ></asp:CustomValidator>

When I fix the debugger on below code that time the code will not be triggered. plz check below code also.

Protected Sub Ref_Id(ByVal source As System.Object, ByVal args As System.Web.UI.WebControls.ServerValidateEventArgs)
    Dim isPresent As String
    isPresent = MembershipManager.IsReferalApproved(Me.txtRefId.Text)
    If isPresent <> "" Then
        addReferralName()
        args.IsValid = True
    Else
        lblRefNotValid.Text = "Referral IDNO does not exist."
        lblRefNotValid.Visible = True
        Me.txtRefName.Text = ""
        args.IsValid = False
    End If
End Sub

You can use e.Value instead of Me.txtRefId.Text because they are the same. CustomValidator takes attribute ValidationProperty value from ControlToValidate. For TexBox this is Text property. — abatishchev
– abatishchev, Commented Jul 2, 2010 at 12:54

MrMagoo · Accepted Answer · 2010-07-02 13:02:18Z

1

your custom validator's control should have the property ValidateEmptyText = True or the validation won't trigger on an empty textbox

answered Jul 2, 2010 at 13:02

MrMagoo

651 silver badge4 bronze badges

Sign up to request clarification or add additional context in comments.

2 Comments

Amol Over a year ago

I add ValidateEmptyText = True in <asp:/> but still serverside validation not fired,The validation fire only when I eliminate Controltovalidate from this asp tag.but my validation function call every time.

MrMagoo Over a year ago

Add back your controltovalidate. Put some default text in your textbox. See if the validation fires.

Tim Schmelter · Accepted Answer · 2010-07-02 12:46:17Z

0

Does your txtRefId Autopostback and CausesValidation?

answered Jul 2, 2010 at 12:46

Tim Schmelter

462k79 gold badges719 silver badges980 bronze badges

2 Comments

abatishchev Over a year ago

I believe TextBox doesn't do any (Auto)Postback. Only CustomValidator does - because calls code-behind methods

Tim Schmelter Over a year ago

You're on the wrong track. msdn.microsoft.com/en-us/library/… The Validator does not post back. It is validated on the Codebehind when you do a Page.Validate()

Collectives™ on Stack Overflow

Custom server side validation in ASP.NET + VB.NET

2 Answers 2

2 Comments

2 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

2 Comments

2 Comments

Your Answer

Sign up or log in

Post as a guest

Related