Cascading Textbox in mvc4?

Question

Hi I have two fields in my view CustomerName and ContactPerson. Before i kept these two field as dropdown field. Now I change the customer name field as autoComplete textbox and contact person field as dropdown field.

Before i kept these two field as Cascading dropdown fields.That is if i select theCusomerName the CustomerName related ContactPerson will automatically in ContactPerson dropdown.

Now I change that customer name field to textbox and contact person field as dropdown. Now what i want is if i type and select the CustomerName in customername textox, the CustomerName related ContactPerson have to load automatically in contactperson dropdown.

My Model

Visitors View Model

public Nullable<System.Guid> CustomerID { get; set; }

public string CustomerName { get; set; }

public Nullable<System.Guid> CustomerContactID { get; set; }

public string ContactPerson { get; set; }

 

 

My View

@Html.LabelFor(model => Model.CustomerName, new { @class = "control-label" })

@Html.TextBoxFor(model => Model.CustomerName, new { @class = "form-control" })

@Html.HiddenFor(model => Model.CustomerID)

@Html.Label("Contact Person", new { @class = "control-label" })

@Html.DropDownListFor(model => model.CustomerContactID, new SelectList(string.Empty, "Value", "Text"), "Please select a ContactPerson", new { @class = "form-control", type = "text", id = "CustomerContactID" })

 

 

 

My Jquery Code

<link href="~/Areas/Sales/Content/themes/base/jquery-ui.css" rel="stylesheet" />

<script src="~/Areas/Sales/Scripts/jquery-2.2.3.min.js"></script>

<script src="~/Areas/Sales/Scripts/jquery-ui.1.10.4min.js"></script>

<script type="text/javascript">

$(document).ready(function () {

debugger;

$("#CustomerName").autocomplete({

source: function (request, response) {

$.ajax({

url: '@Url.Action("GetVisitCustomer", "VisitorsForm")',

datatype: "json",

data: {

Areas: 'Sales',

term: request.term

},

success: function (data) {

response($.map(data, function (val, item) {

debugger;

return {

label: val.Name,

value: val.Name,

customerId: val.ID

}

}))

}

})

},

select: function (event, ui) {

$("#CustomerID").val(ui.item.customerId);

debugger;

}

});

});

var Customerid = $("CustomerID").val();

$('#CustomerName').blur(function () {

debugger;

$('#CustomerContactID').empty();

$.ajax(

'@Url.Action("GetContactPersobByCustomerId", "VisitorsForm", new { Area = "Sales" })', {

type: "POST",

datatype: "Json",

data: { CustomerID: $('#CustomerID').val() },

success: function (data) {

$('#CustomerContactID').append($('<option></option>').val('').text('Please select'));

$.each(data, function (index, value) {

$('#CustomerContactID').append('<option value="' + value.CustomerContactID + '">' + value.ContactReference + '</option>');

});

}

});

});

 

 My Controller Code

public JsonResult GetVisitCustomer(string Areas, string term = "")

{

var objCustomerlist = db.Customers.Where(c => c.IsDeleted == false)

.Where(c => c.DisplayName.ToUpper()

.Contains(term.ToUpper()))

.Select(c => new { Name = c.DisplayName, ID = c.CustomerID })

.Distinct().ToList();

return Json(objCustomerlist, JsonRequestBehavior.AllowGet);

}

public JsonResult GetContactPersobByCustomerId(string customerId)

{

Guid Id = Guid.Parse(customerId);

var customercontacts = (from a in db.CustomerContacts where a.CustomerID == Id select a);

return Json(customercontacts, JsonRequestBehavior.AllowGet);

}

 

 

 My above code is working if i type and select the customer name the customername relatedcontact person is loading in contact person dropdown but what my doubt is i gave blur function in contact person dropdown

 

$('#CustomerName').blur(function () {

 I donno my code is correct or not however it is working. now what i want is any one tell me the alternate or correct code for this blur function. I tried to explain my issue as per my level best any one help me to resolve this issue..