Hi Arvind,
If you want to perform the action on client side ( ie: javascript ) you can use
onblur
event.
<asp:TextBox ID="txt" runat="server" onblur="javascript:dosomething()"></asp:TextBox>
var dosomething = function () {
alert('you have lost the focus');
}
in server side, you can use
TextChanged
event,
Dont forget to put
AutoPostBack=true
<asp:TextBox ID="txt" runat="server" AutoPostBack="true" OnTextChanged="txt_TextChangedEvent"></asp:TextBox>
protected void txt_TextChangedEvent(object sender, EventArgs e)
{
}