2010-07-13 205 views
5

我有錯誤消息:我無法弄清楚什麼是錯的。有人能幫助我嗎。謝謝。堆棧跟蹤錯誤

堆棧跟蹤:

[NotSupportedException異常:Collection是 只讀]
System.SZArrayHelper.Clear()56
System.Web.Mvc.CollectionHelpers.ReplaceCollectionImpl (ICollection`1 collection,IEnumerable newContents) +125

ExecuteStep(IExecutionStep step, 布爾& completedSynchronously)184

我的代碼是: 型號:

namespace TestArrays.Models 
{ 
    public class Person 
    { 
     public CategoriesRow[] Categories { get; set; } 
     public Person() 
     { 

      Categories = new CategoriesRow[1]; 
      Categories[0] = new CategoriesRow(); 
      Categories[0].Name = "Bug"; 
      Categories[0].ID = "0"; 
     } 
    } 

    public class CategoriesRow 
    { 
     public String Name { get; set; } 
     public String ID { get; set; } 
    } 

} 

控制器

public ActionResult Create() 
    { 
     return View(new Person()); 
    } 

    // 
    // POST: /Person/Create 

    [HttpPost] 
    public ActionResult Create(Person person) 
    { 
     try 
     { 
      // TODO: Add insert logic here 

      return RedirectToAction("Index"); 
     } 
     catch 
     { 
      return View(); 
     } 
    } 

查看

<form id="Form" action="<%=Url.Action("Create",new{Action="Create"}) %>" method="post" enctype="multipart/form-data"> 
    <div id="categoriessection" > 
      <h3>Categories</h3> 
      <ul class= "list" id="categoryList"> 
      <%if (Model.Categories!=null) {%> 
      <%int count = 0; %> 
       <%foreach (var category in Model.Categories) 
       {%> 
       <%if (!String.IsNullOrEmpty(category.Name))     
        {%> 
        <li><input type="hidden" name="Categories.Index" value="<%=count%>" /> 
         <input type="text" value="<%=category.Name%>" name="Categories[<%=count%>].Name" style="width:280px"/> 
         <input type="hidden" value="<%=category.ID%>" name="Categories[<%=count++%>].ID" style="width:280px"/> 
         <input type="button" value = "Delete"/> 
        </li> 
        <%} 
        %> 
       <%} %> 
      <%} %>    
       <li> <input type="hidden" name="Categories.Index" value="value0" /> 
       <input type="text" value="" name="Categories[value0].Name" style="width:280px"/> 
        <input type="hidden" value="" name="Categories[value0].ID" style="width:280px"/> 
        <input type="button" value= "Add" /> 
       </li> 
      </ul> 
     </div> 

     <div> 
     <input type ="submit" value="Save" id="save" /> 
     </div> 
     </form> 
+0

我懷疑這個問題涉及到什麼是從'<%的foreach(在Model.Categories VAR類)'返回。更確切地說,'Model.Categories'部分,您的代碼片段不會顯示定義。也許澄清? – 2010-07-13 06:46:47

回答

5

我通常使用列表,而不是向量模型:

public List<CategoriesRow> Categories { get; set; }