Question

我在我的单页应用程序中使用Knockout js，我需要将一个viewmodel数据的值携带到另一个viewModel数据，所以我可以减少我的重复创建相同的视图，我如何能够实现以下是我的代码。我有两个不同的js文件，其中一个由Employee ViewModel和另一个Department View Model

组成

   //Employee View
<div class="Employee-view"  data-role="view" id="employee">
  <div data-role="content" >
  <ul>
  <li foreach:EmployeeData>

      //Onlcick of this need to navigate to  Department view and bind all values on particular Employee ID 
     <div databind:"click:GetDepartmentDetails">
      <span data-bind:"text:EmployeeId"> <span>
      <span data-bind:"text:EmployeeName"> <span>
      <span data-bind:"text:EmployeeImage"> <span>
     <div> 
  <li>
 <ul>
</div>
</div>


 EmployeeViewModel = new EmployeeDetailsViewModel();;
  $(".Employee-view").each(function () {
    ko.applyBindings(EmployeeViewModel, $(this).get(0));
  });


 function EmployeeViewModel()
   {
    var self=this;
    self.EmployeeData = ko.observableArray([]);

   self.GetEmployee=function(UserName,Password){  

   var UserModel = { UserName: UserName, Password: Password}
     $.ajax({
            type: "POST",
            dataType: "json",
            url: serverUrl + 'xxx/xxx/GetEmployee',
            data: UserModel,
            success: function (data) {
            self.EmployeeData($.map(data, function (item) {
            return new EmployeeModel(item);
           })),
         });}

        //Click EVENT
         self.GetDepartmentDetails=(EmployeeData)
        {
          // I am getting all the value in this ViewModel,I need to pass   this value to DepartmentViewModel  and i need to call the function  
        self.GetEmployeeByDepartment();
        }

    }

  function EmployeeModel(data)
  {
       var self=this;
       self.EmployeeId=ko.observable(data.EmployeeId)
       self.EmployeeName=ko.observable(data.EmployeeName)
       self.EmployeeImage=ko.observable(data.EmployeeImage)
  }

 //Department View
 <div class="Department-view" data-role="view" id="Department">
  <div data-role="content">
  <ul>
  <li   data-bind:"foreach:DepartmentData ">
     <div>
      <span data-bind:"text:DeptId"> <span>
      <span data-bind:"text:DeptName"> <span>
     <div> 
  <li>
 <ul>
</div>
</div>

  //Department View Model
   function DepartmentViewModel ()
   {
    var self=this;
    self.DepartmentData = ko.observableArray([]);

  self.GetEmployeeByDepartment=function(item){  
       employeeID=item.EmployeeId
       employeename=item.Employeename
  var DeptModel = { Employeename: employeeID, Employeename: employeename}
    $.ajax({
            type: "POST",
            dataType: "json",
            url: serverUrl + 'xxx/xxx/GetDepratmenDetails',
            data: DeptModel ,
            success: function (data) {
            self.DepartmentData ($.map(data, function (item) {
            return new DepartmentModel(item);
           })),
         });}}
}

 function DepartmentModel(data)
  {
       var self=this;
       self.DeptId=ko.observable(data.DeptID)
       self.DeptName=ko.observable(data.DeptName)
  }

 DepartmentViewModel = new DepartmentDetailsViewModel();
  $(".Department-view").each(function () {
    ko.applyBindings(DepartmentViewModel, $(this).get(0));
  });

Answer 1

您可以尝试在对象中收集实例化视图模型，然后在此对象上运行applybindings。你必须重新扫描你已经绑定的东西。但是，通过访问例如vm.EmployeeViewModel.SomeFunction（）

，您应该能够在模型之间交叉引用。

var vm = {};
vm.EmployeeViewModel = new EmployeeViewModel();
vm.DepartmentViewModel = new DepartmentViewModel();
ko.applyBindings(vm);

Answer 2

这是components的用途。拥有一个拥有自己的ViewModel的Employee组件，一个拥有自己的ViewModel的Department组件，以及一个协调它们的应用程序ViewModel。一般来说，对于整个应用程序，最佳做法是applyBindings一次，让Knockout完全控制DOM。

您做事的方式表明您从拥有多个员工和部门的HTML开始，也就是说，您的数据嵌入在HTML中，并且您期望Knockout提取它从那里。这不是好习惯。您的ViewModel应该包含员工数据，View应该反映ViewModel中的内容。

如何将数据从一个viewModel传递到另一个ViewModel Knockout JS

2 个答案: