Javascript 无法从WEB API项目中使用的Knockout.js视图模型发送JSON调用

Javascript 无法从WEB API项目中使用的Knockout.js视图模型发送JSON调用,javascript,knockout.js,asp.net-web-api,knockout-mvc,Javascript,Knockout.js,Asp.net Web Api,Knockout Mvc,从我的Knockout.js模型函数发送AJAX调用时,我遇到了一些问题 我觉得这很奇怪。我的淘汰脚本看起来像 <script type="text/javascript"> var userinfoViewModel = function () { var self = this; self.ID = ko.observable("0"); self.First_Name = ko.observable("");

从我的Knockout.js模型函数发送AJAX调用时,我遇到了一些问题

我觉得这很奇怪。我的淘汰脚本看起来像

<script type="text/javascript">
    var userinfoViewModel = function () {
        var self = this;
        self.ID = ko.observable("0");
        self.First_Name = ko.observable("");
        self.Last_Name = ko.observable("");
        self.Login_Id = Ko.observable("");
        self.Password = ko.observable("");
        self.Role = ko.observable("");

        var user = {
            ID: self.ID,
            First_Name: self.First_Name,
            Last_Name: self.Last_Name,
            Login_Id: self.Login_Id,
            Password: self.Password,
            Role: self.Role
        };

        //Declare an ObservableArray for Storing the JSON Response
        self.Users = ko.observableArray([]);

        //Function to Read All Users
        function GetUsers() {
            //Ajax Call Get All Employee Records
            $.ajax({
                type: "GET",
                url: "/api/user",
                contentType: "application/json",
                dataType: "json",
                success: function (data) {
                    self.Users(data); //Put the response in ObservableArray
                },
                error: function (error) {
                    alert(error.status + "<--and--> " + error.statusText);
                }
            });
            //Ends Here
        }


        //call GetUsers Ajax call.
        GetUsers();

        //CRUD Operations

        //Function to perform POST (insert User) operation
        self.Create = function () {
            //Ajax call to Insert the User
            $.ajax({
                type: "POST",
                url: "/api/user",
                data: ko.toJSON(User), //Convert the Observable Data into JSON
                contentType: "application/json",
                success: function (data) {
                    alert("Record Added Successfully");
                    self.EmpNo(data.EmpNo);
                    alert("The New Employee Id :" + self.EmpNo());
                    GetEmployees();
                },
                error: function () {
                    alert("Failed");
                }
            });
            //Ends Here
        };

        self.update = function () {
            var url = "/api/user/" + self.EmpNo();
            alert(url);
            $.ajax({
                type: "PUT",
                url: url,
                data: ko.toJSON(EmpData),
                contentType: "application/json",
                success: function (data) {
                    alert("Record Updated Successfully");
                    GetEmployees();
                },
                error: function (error) {
                    alert(error.status + "<!----!>" + error.statusText);
                }
            });
        };

        //Function to perform DELETE Operation
        self.deleterec = function (user) {
            $.ajax({
                type: "DELETE",
                url: "/api/EmployeeInfoAPI/" + employee.EmpNo,
                success: function (data) {
                    alert("Record Deleted Successfully");
                    GetUser();//Refresh the Table
                },
                error: function (error) {
                    alert(error.status + "<--and--> " + error.statusText);
                }
            });
            // alert("Clicked" + employee.EmpNo)
        };


        //Function to Display record to be updated
        self.getselecteduser = function (user) {
            self.ID(user.ID),
            self.First_Name(user.First_Name),
            self.Last_Name(user.Last_Name),
            self.Login_Id(user.Login_Id),
            self.Password(user.Password),
            self.Role(user.Role)
        };
    };

ko.applyBindings(new userinfoViewModel());
    </script>
}

var userinfoViewModel=函数(){
var self=这个;
self.ID=ko.可观察(“0”);
self.First_Name=ko.observable(“”);
self.Last_Name=ko.可观察(“”);
self.Login_Id=Ko.observable(“”);
self.Password=ko.observable(“”);
self.Role=ko.observable(“”);
变量用户={
ID:self.ID,
名字:self.First\u Name,
姓氏:self.Last_Name,
Login\u Id:self.Login\u Id,
密码:self.Password,
角色:自我。角色
};
//声明用于存储JSON响应的ObservableArray
self.Users=ko.observearray([]);
//函数读取所有用户
函数GetUsers(){
//Ajax调用获取所有员工记录
$.ajax({
键入:“获取”,
url:“/api/user”,
contentType:“应用程序/json”,
数据类型:“json”,
成功:功能(数据){
self.Users(data);//将响应放在ObservableArray中
},
错误:函数(错误){
警报(error.status+“”+error.statusText);
}
});
//到此为止
}
//调用GetUsers Ajax调用。
GetUsers();
//积垢作业
//执行POST(插入用户)操作的函数
self.Create=函数(){
//Ajax调用以插入用户
$.ajax({
类型:“POST”,
url:“/api/user”,
data:ko.toJSON(用户),//将可观察数据转换为JSON
contentType:“应用程序/json”,
成功:功能(数据){
警报(“成功添加记录”);
self.EmpNo(data.EmpNo);
警报(“新员工Id:+self.EmpNo());
GetEmployees();
},
错误:函数(){
警报(“失败”);
}
});
//到此为止
};
self.update=函数(){
var url=“/api/user/”+self.EmpNo();
警报(url);
$.ajax({
键入:“放置”,
url:url,
数据:ko.toJSON(EmpData),
contentType:“应用程序/json”,
成功:功能(数据){
警报(“记录更新成功”);
GetEmployees();
},
错误:函数(错误){
警报(error.status+“”+error.statusText);
}
});
//警报(“单击”+employee.EmpNo)
};
//用于显示要更新的记录的函数
self.getselecteduser=函数(用户){
self.ID(user.ID),
自身名(用户名),
self.Last_Name(user.Last_Name),
self.Login\u Id(user.Login\u Id),
self.Password(用户密码),
self.Role(user.Role)
};
};
applyBindings(新的userinfoViewModel());
}
我在页面中使用的底层HTML如下所示-

 <form>
        <table>
            <tr>
                <td>
                    <!--Bind the TextBoxes in the Table to the observable properties defined into the ViewModel -->
                    <table id="tbldml">
                        <tr>
                            <td>ID</td>
                            <td>
                                <input type="text" id="ID" data-bind="value: $root.ID" /></td>
                        </tr>
                        <tr>
                            <td>First_Name</td>
                            <td>
                                <input type="text" id="First_Name" data-bind="value: $root.First_Name" /></td>
                        </tr>
                        <tr>
                            <td>Last_Name</td>
                            <td>
                                <input type="text" id="Last_Name" data-bind="value: $root.Last_Name" /></td>
                        </tr>
                        <tr>
                            <td>Login_Id</td>
                            <td>
                                <input type="text" id="Login_Id" data-bind="value: $root.Login_Id" /></td>
                        </tr>
                        <tr>
                            <td>Password</td>
                            <td>
                                <input type="text" id="Password" data-bind="value: $root.Password" />
                            </td>
                        </tr>
                        <tr>
                            <td>Role</td>
                            <td>
                                <input type="text" id="Role" data-bind="value: $root.Role" />
                            </td>
                        </tr>
                        <tr>
                            <!--The click binding has the JavaScirpt methods passed to it-->
                            <td>
                                <button data-bind="click :$root.save">Save</button></td>
                            <td>
                                <button data-bind="click: $root.update">Update</button></td>
                        </tr>
                    </table>
                </td>
                <td>
                    <div class="FixedContainer">
                        <!--If the lenght of the Users is greater than 0 then visible the Table-->
                        <table data-bind="visible: Users().length>0">
                            <thead>
                                <tr>
                                    <td>ID</td>
                                    <td>First_Name</td>
                                    <td>Last_Name</td>
                                    <td>Login_Id</td>
                                    <td>Role</td>
                                    <td></td>
                                </tr>
                            </thead>
                            <!--Iterate through an observableArray using foreach-->
                            <tbody data-bind="foreach:  Users">
                                <tr data-bind="click: $root.getselecteduser" id="updtr">
                                    <td><span data-bind="text: ID"></span></td>
                                    <td><span data-bind="text: First_Name"></span></td>
                                    <td><span data-bind="text: Last_Name"></span></td>
                                    <td><span data-bind="text: Login_Id"></span></td>
                                    <td><span data-bind="text: Role"></span></td>
                                    <td>
                                        <button data-bind="click: $root.deleterec">Delete</button>
                                    </td>
                                </tr>
                            </tbody>
                        </table>
                    </div>
                </td>
            </tr>
        </table>
    </form>
</section>

身份证件
名字
姓
登录标识
密码
角色
拯救
更新
身份证件
名字
姓
登录标识
角色
删除

这个问题看起来很奇怪,不过我想,绑定是非常合适的。 我的API调用URL类似于-Http://localhost:1234/api/user

Fiddler track:我试着通过
self.Login_Id = Ko.observable(""); // must be 'ko'
 function User(data){
    self = this;
    self.ID = ko.observable(data.ID);
    self.First_Name = ko.observable(data.First_Name);
    self.Last_Name = ko.observable(data.Last_Name);
    self.Login_Id = Ko.observable(data.Login_Id);
    self.Password = ko.observable(data.Password);
    self.Role = ko.observable(data.Role);
 }
var userinfoViewModel = function () {
    var self = this;
    //Declare an ObservableArray for Storing the JSON Response
    self.Users = ko.observableArray([]);

    ...
    in your CREATE function loop through the AJAX response: 
      for(user in ajaxData){
        var newUser = new User(user);
      }
      //then push it onto the Users array
      self.Users.push(newUser);

    ...
    other CRUD functions
    ...        
}