hi all....


i want whenever a txtEmail lost focus ... it will call server side event eg: CheckEmailExists instead of waiting a [submit] button hitted to fire the checking.


Anyone can help ? please dont ask me to client side validation as i need to query database to get result.

use javascript

Use ontextchanged event.

beside this method ? is there any way to fire the custom validator ?

Can only give you hints, lazy to write the solutions

if for Javascript, u can use JSON.
or u can use WebServices (asmx will be enuf)

or more tricky way:
1) add updatepanel to ur page
2) add a hidden button (btnCheckEmail) which to postback to server for CheckEmailExists() function
3) bind a jscript to ur txtEmail to call __doPostBack('btnCheckEmail_ClientId','')
4) bingo~

happy coding

This post has been edited by eueu: Aug 27 2011, 11:37 AM

eueu ... thanks for reply... but something i dont understand over here ...

<asp:CustomValidator ID="CustomValidator1" runat="server"
Display="Dynamic" ControlToValidate="txtLoginId"
ErrorMessage="Login ID exists" ClientValidationFunction="CHECK"></asp:CustomValidator>


function CHECK(source, args) {
//alert($get('<%= txtLoginId.ClientID %>').value);
PageMethods.GetContactName($get('<%= txtLoginId.ClientID %>').value, onSucceeded, onFailed);
}
function onSucceeded(msg, userContext, methodName, onFailed) {
var gg = msg;
if (gg != 1) {

args.IsValid = false;
}
}
function onFailed(error, userContext, methodName) {
alert("An error occurred");
}


vb.net code
Public Shared Function GetContactName(ByVal s As String) As Integer
Return Convert.ToInt16(s)
End Function


the problem is args.isValid can only be used inside CHECK function... because it receive args parameter from the custom validator...

i want to fire the args.IsValid in onSucceeded ...

Try to use document.getElementById instead of $get("")

If still cant, read this article.
http://brian.dobberteen.com/code/jquery_aj...stom_validator/

brother, too hard for me to understand this ... i couldnt even get compiled successfully

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Added on August 29, 2011, 7:05 pmbrother i am trying to use the web service method ...





but it give me dummyWebservice undefined when onblur on textbox ...

This post has been edited by steven1379: Aug 29 2011, 07:05 PM