無法將視圖與Knockout.js中的複雜對象綁定

Question

我試圖使用KnockOut.js綁定視圖上的複雜對象。沒有使用overservable（）和observableArray（），我能夠獲得與視圖綁定的對象。但是，當我實現observable（）時，返回的結果在我的javascript viewmodel中添加了observable對象，並且我的視圖無法綁定視圖模型。

下面是在服務器端代碼執行：

 

    Model: 

    public class SurveyQuestion 
    { 
     public string QuestionNumber { get; set; } 
     public string Question { get; set; } 
     public QuestionType QuestionTypeStructure { get; set; } 
     public IList OptionsList { get; set; } 
    } 

    public enum QuestionType 
    { 
     CheckBox, 
     RadioButton, 
     TextBox, 
     AdvancedCheckBox, 
     AdvancedRadioButton 
    } 

    public class Options 
    { 
     public string OptionValue { get; set; } 
    } 

    ViewModel: 

    public class SurveyCollection 
    { 
     public IList SurveyList { get; set; } 
    } 

在JSON上述通用得出的結果如下

 

    {"SurveyList":[ 

    {"QuestionNumber":"1","Question":"Write down the second consonant after the second vowel?","QuestionTypeStructure":2,"OptionsList":[{"OptionValue":"F"},{"OptionValue":"G"},{"OptionValue":"C"},{"OptionValue":"B"}]}, 

    {"QuestionNumber":"2","Question":"Complete the following letter series: ZYX/ VW/ UTS/ QR/ PON/ LM/ KJI?","QuestionTypeStructure":1,"OptionsList":[{"OptionValue":"GB"},{"OptionValue":"IJ"},{"OptionValue":"GH"},{"OptionValue":"LM"}]}, 

    {"QuestionNumber":"3","Question":"What would be the numrical digits to represent the word VOWEL when the letters of the alphabets were numbered as A 26, B 25, C 24 and o on till Z 1.","QuestionTypeStructure":0,"OptionsList":[{"OptionValue":"5 ,12 ,4, 22, 15"},{"OptionValue":"6 ,12 ,5, 22, 15"},{"OptionValue":"5 ,14 ,4, 22, 16"},{"OptionValue":"4 ,13,4, 22, 12"}]} 

    ]} 

 

    @model Test.UI.ViewModel.SurveyCollection 
    @using System.Web.Script.Serialization 

    [h2]Survey[/h2] 

    [div data-bind="template: { name: 'surveyTemplate', foreach: SurveyList }"][/div] 

    [script type="text/html" id="surveyTemplate"] 
     [div style = "margin-bottom:20px"] 
      [div style = "margin-bottom:10px"] 
       [strong data-bind="text: Question"][/strong] 
      [/div] 
      [div] 
[ul data-bind="template: { name: function() { return QuestionTypeStructure.toString(); }, foreach: OptionsList }"] 
       [ul] 
      [/div] 
     [/div] 
    [/script] 

    [script type="text/html" id="0"] 
     [div] 
      [input type = "radio" style = "margin-right:10px; width: auto"/][span data-bind="text: $data.OptionValue" /] 
     [/div] 
    [/script] 

    [script type="text/html" id="1"] 
     [div] 
      [input type = "checkbox" style = "margin-right:10px"/][span data-bind="text: $data.OptionValue" /] 
     [/div] 
    [/script] 

    [script type="text/html" id="2"] 
     [div] 
      [input type = "text" style = "margin-right:10px"/] 
      [span data-bind="value: $data.OptionValue" /] 
     [/div] 
    [/script] 


     $(document).ready(function() { 
      var surveyViewModel = { 
       SurveyList: ko.observableArray([]) 
      }; 

      var data = $('').html("@(new JavaScriptSerializer().Serialize(Model))").text(); 
      var jsonData = $.parseJSON(data); 
      if (jsonData != undefined) { 
       //$.each(jsonData.SurveyList, function (baseIndex, T) { 
       ko.utils.arrayForEach(jsonData.SurveyList, function (T) { 
        var surveyModel = new SurveyModel(T); 
        surveyViewModel.SurveyList.push(surveyModel); 

        ko.utils.arrayForEach(T.OptionsList, function (Q) { 
         var optionModel = new OptionModel(Q); 
         surveyModel.OptionsList.push(optionModel); 
         //surveyViewModel.SurveyList[baseIndex].OptionsList.push(optionModel); 
        }); 
       }); 
       ko.applyBindings(surveyViewModel); 
      } 
    }); 

    function SurveyModel(T) 
    { 
     this.QuestionNumber = ko.observable(T.QuestionNumber); 
     this.Question = ko.observable(T.Question); 
     this.QuestionTypeStructure = ko.observable(T.QuestionTypeStructure); 
     this.OptionsList = ko.observableArray([]); 
    } 

    function OptionModel(Q) 
    { 
     this.OptionValue = ko.observable(Q.OptionValue); 
    } 

我車削HTML別的東西道歉。問題是，上述結果證明了Mozilla的錯誤字段：

 

    Error: Cannot find template with ID function observable() { 
      if (arguments.length > 0) { 
       // Write 

       // Ignore writes if the value hasn't changed 
       if ((!observable['equalityComparer']) || !observable['equalityComparer'](_latestValue, arguments[0])) { 
        observable.valueWillMutate(); 
        _latestValue = arguments[0]; 
        if (DEBUG) observable._latestValue = _latestValue; 
        observable.valueHasMutated(); 
       } 
       return this; // Permits chained assignments 
      } 
      else { 
       // Read 
       ko.dependencyDetection.registerDependency(observable); // The caller only needs to be notified of changes if they did a "read" operation 
       return _latestValue; 
      } 
     } 
    http://localhost:3391/Scripts/knockout-2.1.0.debug.js 
    Line 2653 

Answer 1

問題與[ul data-bind="template: { foreach: OptionsList }"]你不提供一個模板名稱存在。從你的判斷你想要的其他模板我想這樣的事情：

[ul data-bind="foreach: OptionsList "] 
    [li data-bind="template: $data.OptionValue] 
    [/li] 
[/ul]