How to: Check login name availability in ASP.NET MVC using jQuery Validation plug-in
Posted by: intelbot on: April 1, 2009
I need to write comments for the below code, bcoz of lack of time i am posting only abstract things,if you want to know something, write comment, i will reply.
HTML login control
< input type="text" name="txtUserName" id="txtUserName" class="textBoxes" />
jQuery Rule: Add the below rule into script tag in header & add reference to jquery-1.2.6.js,jquery.validate.js in Head Element
$(document).ready(function() {
$("#frmSelfRegister").validate({
rules: {
txtUserName:
{
required: true,
remote: { type: "post",
url: "Register/IsLoginAvailable" }
},
messages:{
txtUserName: { required: "User Name is Required.",
remote: jQuery.format("{0} is not available.")}
}
});
});
The above validation code executed when the focus changes from txtUserName to some other, it will call IsLoginAvailable method available in the RegisterController, as specified in the url.
Controller Code :
Below code is the one which checks for availability of a username & returns the status to above jQuery Method. The following methods return type is JsonResult because remote method of jQuery accepts the JsonResult object only.
[AcceptVerbs(HttpVerbs.Post)]
public JsonResult IsLoginAvailable(FormCollection collection)
{
JsonResult result = new JsonResult();
try
{
ilogIn.Text = this.GetLoginByUsername(collection.Get("txtUserName").
ToString().Trim());
}
catch (Exception ex)
{
Helper.ErrLogger(ex.Message);
}if (ilogIn.Text == collection.Get("txtUserName").ToString())
{
result.Data = false;
}
else
{
result.Data = true;
}
return result;
}
