c# - How to use the both JavaScript validation and asp.net validation for a control -


i use button click asp.net validation group , client side validation (javascript). give first preference javascript validation if returns true means directly go serverside button click event not check asp.net validations.

<asp:imagebutton id="img_btn_register" runat="server"     imageurl="~/images/register1.png"     **onclientclick="return validat_form()"** onclick="img_btn_register_click1"      **validationgroup="qa"** />

based on question understand that- need field validations should occur first , script should execute.

you can call page_clientvalidate() in client script explicitly execute validations , if successful client script should executed.

here small demo on same:

<html xmlns="http://www.w3.org/1999/xhtml"> <head runat="server">     <title></title>      <script type="text/javascript" language="javascript">         function clientscript() {              if (page_clientvalidate("qa"))**// first check validators in validationgroup "qa"**             {                 alert("save modification?");             }         }     </script>  </head> <body>     <form id="form1" runat="server">     <div>         <asp:textbox id="textbox1" runat="server"></asp:textbox>         <asp:requiredfieldvalidator id="requiredfieldvalidator1" validationgroup="qa"  runat="server" controltovalidate="textbox1"             text="*" errormessage="value in textbox1 required!">         </asp:requiredfieldvalidator>         <asp:button id="button1" runat="server" validationgroup="qa" text="test validation" onclientclick="clientscript()" />     </div>     </form> </body> </html>

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