Client Side Jquery Validation on Button Click in asp.net?

Question

I am trying to validate fields on button click using Jquery but the problem is that it seems that code behind event and jquery event are running in parallel.

(UPDATED)

 <asp:Button ID="btnsave" runat="server" ClientIDMode="Static" OnClientClick="return clientFunction()" CssClass="ButtonText"
                    Text="SAVE" OnClick="btnsave_Click" />
                    &nbsp;

CLIENT SIDE VALIDATION:

<script type="text/javascript">

    function clientFunction() {

        var isValid = true;
        $('#txtsupplieruserid,#txtsuppliername,#txtbusinessemailid,#txtorganizationname,#txtphonenumber,#txtcity,#txtstate,#txtpostalcode,#txtaddress').each(function () {
            if ($.trim($(this).val()) == '') {
                isValid = false;
                $(this).css({
                    "border": "1px solid red",
                    "background": "#FFCECE"
                });
            }
            else {
                $(this).css({
                    "border": "",
                    "background": ""
                });
            }
        });
        if (isValid == false) {

            e.preventDefault();
            return isValid;
        }
        else {
            return isValid;
        }
    }
</script>

I would like to validate through Jquery first than go to code behind if it passes clientside validation. I want to do this using Jquery and not pure Javascript.

Answer 1

You can use OnClientClick for client side validation and if validation passes return true otherwise return false. If true is returned server side function will be called otherwise it won't.

<asp:Button ID="btnsave" runat="server" ClientIDMode="Static" CssClass="ButtonText" Text="SAVE" OnClientClick="return clientFunction()"   onclick="btnsave_Click" />


function clientFunction()
{

    var isValid = true;
    $('#txtsupplieruserid,#txtsuppliername,#txtbusinessemailid,#txtorganizationname,#txtphonenumber,#txtcity,#txtstate,#txtpostalcode,#txtaddress').each(function ()  
    {
             if ($.trim($(this).val()) == '') {
                 isValid = false;
                 $(this).css({
                     "border": "1px solid red",
                     "background": "#FFCECE"
                 });
             }
             else {
                 $(this).css({
                     "border": "",
                     "background": ""
                 });
             }
     });
         if (isValid == false) {
             return false;
         }
         else {
             return true;
         }
}

If your controls are server controls than you may need to use ClientIDMode="Static". So their ID remains same.