Need to use Focus in asp .net text box

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in on blur() event i have used jquery for validation . If validation occurs the text box color should change and the cursor should be on the same text box . I have used focus() for this , but it is not working. Can you help me on this ?

ASP.NET

<asp:TextBox ID="txtMemoName" runat="server" Width="200px" onblur="alertevent();" ></asp:TextBox>

JavaScript

function alertevent() {
            var value = $("#<%=txtMemoName.ClientID %>").val();
            if (value == "") {
		 $("#<%=txtMemoName.ClientID %>").focus();
		 $("#<%=txtMemoName.ClientID %>").css('border', '1px solid red');
	    }
	}

Posted 16-Nov-14 19:29pm

januskarthik

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JR009 17-Nov-14 2:19am

hey, can you get txtMemoName textbox text in value variable?

januskarthik 17-Nov-14 2:21am

yes, i got textbox text in value variable..

JR009 17-Nov-14 2:34am

Ok, then try using javascript like document.getElementById("<%=txtMemoName.ClientID %>").focus(); and also add one more line : $("#<%=txtMemoName.ClientID %>").css('display', 'inline');

januskarthik 17-Nov-14 4:46am

not working jignesh

1 solution

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Sinisa Hajnal · Answer 1 · 2014-11-16T20:16:00

Solution 1

In general you should return false from the validation and use onblur="return alertevent();" which will prevent further propagation of the event.

If this helps please take time to accept the solution. Thank you.

Posted 16-Nov-14 20:16pm

Sinisa Hajnal

Comments

januskarthik 17-Nov-14 4:15am

its does't change anything

Sinisa Hajnal 17-Nov-14 4:35am

Could you update the code in the question with what you've done?

januskarthik 17-Nov-14 4:51am

html:
<asp:TextBox ID="txtMemoName" onblur="return alertevent();" runat="server" Width="200px" >

jquery:
function alertevent() {
var value = $("#<%=txtMemoName.ClientID %>").val();
if (value == "") {
$('#<%=txtMemoName.ClientID %>').focus();
$("#<%=txtMemoName.ClientID %>").css('border', '2px solid red');
}
return false;
}

Mathew Soji 17-Nov-14 4:50am

My +5

Sinisa Hajnal 17-Nov-14 6:07am

Thank you.

Mathew Soji 17-Nov-14 4:51am

Hi,

Check the below code , it works .I tested it in IE.When no data is entered in
Collapse | Copy Code

txtMemoName

it holds the focus and border turns red.

Note : This is same as solution 1 and I am just posting code which I tried.

Collapse | Copy Code

<head runat="server">
<title></title>
<script src="Scripts/jquery-1.10.2.js"></script>
<script type="text/javascript">
function alertevent() {
var value = $("#<%=txtMemoName.ClientID %>").val();
if (value == "") {

$("#<%=txtMemoName.ClientID %>").css('border', '1px solid red');
$("#<%=txtMemoName.ClientID %>").focus();
return false;
}
else {
$("#<%=txtMemoName.ClientID %>").css('border', '1px solid green');
return true;
}
}

</script>
</head>

<body>
<form id="form1" runat="server">
<div>
<asp:TextBox ID="txtMemoName" runat="server" Width="200px" onblur="return alertevent();">
<%--test code for focus tracking--%>
<asp:TextBox ID="TextBox1" runat="server" Width="200px">
</div>
</form>
</body>
</html>

januskarthik 17-Nov-14 5:15am

yes, it is working in IE. but in mozilla firefox not working. i want it work in all browser.

Mathew Soji 17-Nov-14 5:34am

I added a delay and it works in firefox and IE.

function alertevent() {
var value = $("#<%=txtMemoName.ClientID %>").val();
if (value == "") {

$("#<%=txtMemoName.ClientID %>").css('border', '1px solid red');

setTimeout(function () { $("#<%=txtMemoName.ClientID %>").focus(); }, 10);
return false;
}
else {
$("#<%=txtMemoName.ClientID %>").css('border', '1px solid green');
return true;
}
}

januskarthik 17-Nov-14 5:49am

Thank you Mathew.. it is working fine.

Sinisa Hajnal 17-Nov-14 6:07am

Try $(document).ready(function () {
$("#<%=txtMemoName.ClientID %>").on("blur", function () {return alertevent(; });
});

This should bind onblur after the page is ready and all controls prepared for handling.