forum

Home / DeveloperSection / Forums / bind knockoutjs with mvc view is not work

Ask Question

bind knockoutjs with mvc view is not work

Mark M231110-Nov-2014

Hi Guys

I am new in knockoutjs, i am trying to bind the view, but cannot. Data from server is fetching fine, ajax is working fine, but not binding issue.

Here is my js code:

var UserViewModel = function () {
var self = this;
//Declare observable which will be bind with UI
self.Id = ko.observable("0");
self.FirstName = ko.observable("");
self.LastName = ko.observable("");
 
//The Object which stored data entered in the observables
var UserData = {
    Id: self.Id || 0,
    FirstName: self.FirstName || '',
    LastName: self.LastName || ''
   };
 
//Declare an ObservableArray for Storing the JSON Response
self.Users = ko.observableArray([]);
 
GetUser(12); //This is server side method.
 
function GetUser(userId) {
    //Ajax Call Get All Employee Records
    $.ajax({
        type: "GET",
        url: "/api/Users/" + userId,
        contentType: "application/json; charset=utf-8",
        dataType: "json",
        success: function (response) {
            //alert("success");
            UserData = response.data.UserData;
            alert(UserData.FirstName); //This is showing me correct name.
            self.Users(response.data.UserData); //Put the response in ObservableArray
        },
        error: function (error) {
            alert(error.status);
        }
    });
    //Ends Here
}
}

 

ko.applyBindings(new UserViewModel());

Here is my view: 


<form class="form-horizontal" data-bind="with: UserData">
                           <div class="row">
                               <div class="control-group">
                                   <label class="control-label">First Name</label>
                                   <label class="control-label" data-bind="text: FirstName"></label>
                               </div>
                            </div>
                            <div class="row">
                              <div class="control-group">
                                   <label class="control-label">Last Name</label>
                                   <input type="text" placeholder="Last Name" data-bind="value: LastName">
                               </div>
                            </div>

 Thanks

asp.net mvc view  knockout.js  knockout mvc 
Updated on 10-Nov-2014
Mark M

Mark M

Follow

Can you answer this question?

Answer

1 Answers

Anonymous User

Anonymous User

10-Nov-2014

Your problem is that you are trying to two-way data-bind against a non-observable property, so when you update it it isn't notifying the UI. Make your user an observable and set it to an instance of an object or create a model to derive your properties from.

function userModel(user) {
    var self = this;
    self.Id = ko.observable(user.Id);
    self.FirstName = ko.observable(user.FirstName);
    self.LastName = ko.observable(user.LastName);
}
var viewModel = function () {
    var self = this;    
    //The Object which stored data entered in the observables
    var UserData = ko.observable();
    GetUser(12);
    function GetUser(userId) {
        //Ajax Call Get All Employee Records
        $.ajax({
            type: "GET",
            url: "/api/Users/" + userId,
            contentType: "application/json; charset=utf-8",
            dataType: "json",
            success: function (response) {
                //alert("success");
                UserData(new userModel(response.data.UserData));
                alert(UserData().FirstName()); //This is showing me correct name.
                self.Users.push(UserData()); //Put the response in ObservableArray
            },
            error: function (error) {
                alert(error.status);
            }
        });
    }
}
ko.applyBindings(new viewModel());
MindStick Training

Liked By