JSON.NET：從JSON反序列化與LINQ

Question

我具有以下JSON：

{[ 
    "{\"Id\":3,\"ParentName\":\"TicketController\",\"ChildName\":null,\"Body\":\"Ticket\",\"ParentId\":null,\"HasChildren\":true,\"imageUrl\":null}", 
    "{\"Id\":0,\"ParentName\":\"TicketController\",\"ChildName\":\"MainPage\",\"Body\":\"HomePage\",\"ParentId\":3,\"HasChildren\":false,\"imageUrl\":null}", 
    "{\"Id\":1,\"ParentName\":\"TicketController\",\"ChildName\":\"TicketList\",\"Body\":\"Requests\",\"ParentId\":3,\"HasChildren\":false,\"imageUrl\":null}", 
    "{\"Id\":2,\"ParentName\":\"TicketController\",\"ChildName\":\"Responses\",\"Body\":\"Responses\",\"ParentId\":3,\"HasChildren\":false,\"imageUrl\":null}", 
    "{\"Id\":3,\"ParentName\":\"TicketController\",\"ChildName\":\"UpdateResponse\",\"Body\":\"Edit\",\"ParentId\":3,\"HasChildren\":false,\"imageUrl\":null}", 
    "{\"Id\":4,\"ParentName\":\"TicketController\",\"ChildName\":\"UpdateResponse\",\"Body\":\"Update\",\"ParentId\":3,\"HasChildren\":false,\"imageUrl\":null}", 
    "{\"Id\":5,\"ParentName\":\"TicketController\",\"ChildName\":\"RequestDetail\",\"Body\":\"Detail\",\"ParentId\":3,\"HasChildren\":false,\"imageUrl\":null}", 
    "{\"Id\":6,\"ParentName\":\"TicketController\",\"ChildName\":\"RequestDetail\",\"Body\":\"Save\",\"ParentId\":3,\"HasChildren\":false,\"imageUrl\":null}", 
    "{\"Id\":7,\"ParentName\":\"TicketController\",\"ChildName\":\"DeleteRequest\",\"Body\":\"Delete\",\"ParentId\":3,\"HasChildren\":false,\"imageUrl\":null}" 
]} 

結果由用戶選擇在客戶端側的一些複選框（KendoUI樹視圖女巫複選框）產生：

var checkedNodes = []; 
function checkedNodeIds(nodes) { 
    for (var i = 0; i < nodes.length; i++) { 
     if (nodes[i].checked) { 
      var page = { 
       Id: nodes[i].Id, 
       ParentName: nodes[i].ParentName, 
       ChildName: nodes[i].ChildName, 
       Body: nodes[i].Body, 
       ParentId: nodes[i].ParentId, 
       HasChildren: nodes[i].HasChildren, 
       imageUrl: nodes[i].imageUrl 
      }; 
      checkedNodes.push(JSON.stringify(page)); 
      console.log(nodes[i]); 
     } 

     if (nodes[i].hasChildren) { 
      checkedNodeIds(nodes[i].children.view(), checkedNodes); 
     } 
    } 
} 
$('#btnSave').click(function() { 
    var tv = $("#my-treeview").data("kendoTreeView"); 
    checkedNodeIds(tv.dataSource.view()); 
    var data = {}; 
    data.checks = JSON.stringify(checkedNodes); 
    $.ajax({ 
     url: '@Url.Action("SaveTreeViewData", "Main", new {area = ""})', 
     type: 'POST', 
     data: data, 
     dataType: 'json', 
     success: function(result) { 
      alert("Success"); 
     }, 
     error: function(result) { 
      alert("Error"); 
     } 
    }); 
}); 

在服務器端我使用這個動作方法parsing the json結果：

[HttpPost] 
public ActionResult SaveTreeViewData(string checks) { 
    //var result = JsonConvert.DeserializeObject<Page[]>(checks.Substring(1, checks.Length-2)); 
    var jsonArray = JArray.Parse(checks); 
    IList <Page> pages = jsonArray.Select(p = > new Page { 
     Id = (int) p["Id"], 
     ParentName = (string) p["ParentName"], 
     ChildName = (string) p["ChildName"] ? ? "NoChild", 
     ParentId = (int) p["ParentId"], 
     HasChildren = (bool) p["HasChildren"], 
     Body = (string) p["Body"], 
     imageUrl = (string) p["imageUrl"] 
    }).ToList(); 

    return Json("ok"); 
} 

但WH我點擊保存按鈕我得到這個例外：

{"Cannot access child value on Newtonsoft.Json.Linq.JValue."} 

任何想法？

Answer 1

數組中的每個元素只是另一個字符串 - 所以您還需要解析每個元素。例如：

IList<Page> pages = jsonArray 
    .Select(text => JObject.Parse(text)) 
    .Select(p => new Page { ... }) 
    .ToList(); 

可替代地，改變你的Javascript代碼來避免編碼雙的，所以你最終的JSON：

{[ 
    {"Id":3,"ParentName":"TicketController",""ChildName"":null,"Body":"Ticket","ParentId":null,"HasChildren":true,"imageUrl":null}, 
    ... 

]}