I develop registration form and it have username field, and it's required to be like
twitter username check ( real time check ) .. i already develop as in every textbox key up I use jquery to pass textbox.Text to page that return if is username exist or not as following code :
function Check() {
var userName = $('#<%= TextBox1.ClientID %>').val();
if (userName.length < 3) {
$('#checkUserNameDIV').html("user name must be between 3 and 20");
return;
}
$('#checkUserNameDIV').html('<img src="loader.gif" />');
//setTimeout("CheckExistance('" + userName + "')", 5000);
CheckExistance(userName);
}
function CheckExistance(userName) {
$.get(
"JQueryPage.aspx", { name: userName },
function(result) {
var msg = "";
if (result == "1")
msg = "Not Exist " + '<img src="unOK.gif" />';
else if (result == "0")
msg = "Exist" ;
else if (result == "error")
msg = "Error , try again";
$('#checkUserNameDIV').html(msg);
}
);
}
but i don't know if is it the best way to do that ? specially i do check every keyup ..
is there any design pattern for this problem or nay good practice for doing that ?
