postback and validation in asp.net and javascript

Question

I have this much

HTML

<asp:Button ID="btnSaveContest" runat="server" Text="Save & Publish Contest" OnClientClick=" ValidateCreateContest();" ValidationGroup="ContestAdd" OnClick="btnSaveContest_Click" CausesValidation="false"/>

JavaScript

<script type="text/javascript">
    function ValidateCreateContest() {
        Page_ClientValidate();
        if (Page_IsValid) {
            alert('page is valid');
            $('#<%=btnSaveContest.ClientID%>').attr('disabled', 'disabled');
            __doPostBack('<%=btnSaveContest.ClientID%>', '')
            return true;
        }
        else {
            alert('not valid');      
            return false;
        }     

    }
</script>

It does post back to the page, but it does not go to the server side function btnSaveContest_Click. Why ?

I have had some troubles doing similar things to this. One solution I found was to do OnClientClick="ValidateCreateContest(); return isFormValid;", and then in the ValidateCreateContest(); function do isFormValid = true, isFormValid = false as required, with isFormValid being a global variable. — Oliver
– Oliver, Commented Sep 2, 2011 at 9:35
@Oliver :- It did postback, but it did not go to the btnSaveContest_Click function... ??? — Rauf
– Rauf, Commented Sep 2, 2011 at 9:37
first check if there is any javascript error in the page using error console. if you are checking it using a breakpoint then stop the project make a clean build and then again rebuild and run the project see if it helps and if this does not work try changing the default browser. — Devjosh
– Devjosh, Commented Sep 2, 2011 at 9:38

Community · Accepted Answer · 2017-05-23 11:55:45Z

4

Don't use ClientID, use UniqueID

    if (Page_IsValid) {
        alert('page is valid');
        $('#<%=btnSaveContest.ClientID%>').attr('disabled', 'disabled');
        __doPostBack('<%= btnSaveContest.UniqueID %>', '')
        return true;
    }
    else {
        alert('not valid');      
        return false;
    }

This question may be useful.

edited May 23, 2017 at 11:55

CommunityBot

11 silver badge

answered Sep 2, 2011 at 9:40

onof

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4 Comments

Devjosh Over a year ago

@_onof would you please tell the difference between ClientId And UniqueId.please explore your answer a bit it will help OP.Thanks

Rauf Over a year ago

@Devjosh - velocityreviews.com/forums/…

onof Over a year ago

stackoverflow.com/questions/1612016/…

Devjosh Over a year ago

@mraufk & onof:Thanks for your explanation and help links it will surely help me

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