API反序列化JSON在機能的研究，從VS工程/瀏覽器，而不是從jQ​​uery的

Question

調用時

我曾經在一個VB項目下面的類，它是一個ASMX服務（有點老土，我知道）：

Public Class cName 
    Public Property nameOrAlias As String 
    Public Property nameType As String 
    Public Property isVerified As String 
    Public Property nameID As String 
    Public Property icn As String 
End Class 

而且我用它在以下功能：

<WebMethod()> 
    Public Function SaveCaseNames(jsn As String) As String 

     Try 
      Dim json As String = jsn 

      Dim d As New DataTable 
      Dim c As New cShared 

      Dim s As New System.Web.Script.Serialization.JavaScriptSerializer 
      Dim sql As String = "" 
      Dim icn As String = "" 
      Dim sArgs As String = "" 

      Dim o As Object = s.Deserialize(Of Object)(json) 


      Dim js As New System.Web.Script.Serialization.JavaScriptSerializer 
      Dim lstNames = js.Deserialize(Of List(Of cName))(json) 

      'First we look for new names, those without a nameID 
      For Each cx As cName In lstNames 

       icn = cx.icn.ToString 
       If cx.nameID.ToString = "--" Then 

        sArgs &= "'" & icn & "', " 
        sArgs &= "'" & cx.nameOrAlias.ToString & "', " 
        sArgs &= "'" & cx.nameType.ToString & "', " 

        Select Case cx.isVerified.ToString 
         Case "YES" 
          sArgs &= "1" 
         Case "NO" 
          sArgs &= "0" 
        End Select 

        sql = "sp_insertCaseNames " & sArgs 
        d = c.GetDataTable(c.SetConnection(), sql) 
        d.TableName = "insertNames" 

       End If 



      Next 

      'if it has a D the entry should be deleted. 
      For Each cx As cName In lstNames 
       If cx.nameID.ToString.StartsWith("D") Then 
        Dim nameID As String = Replace(cx.nameID.ToString, "D", "") 
        sql = "UPDATE casenames Set st_id = 4 WHERE id = " & nameID 
        d = c.GetDataTable(c.SetConnection(), sql) 
        d.TableName = "deleteNames" 
       End If 
      Next 

      Return "HELLO WORLD!" 

     Catch ex As Exception 
      Debug.Print(ex.Message.ToString) 
     End Try 

    End Function 

使用表格是有點滑稽，當然既然兩種數據調用的返回任何東西，但我不寫輔助功能尚未完成，在任何率不這個問題是關於什麼的。

如果我在VS 2015中運行該項目，它運行良好。我將以下JSON傳遞給上面的函數和所有作品。

[{"nameOrAlias":"TEST 4","nameType":"MIDDLE","isVerified":"YES","nameID":"16","icn":"N2016000020"},{"nameOrAlias":"TEST1","nameType":"AKA","isVerified":"YES","nameID":"D15","icn":"N2016000020"},{"nameOrAlias":"TESTXXX101","nameType":"AKA","isVerified":"YES","nameID":"17","icn":"N2016000020"},{"nameOrAlias":"HELLO JOE","nameType":"AKA","isVerified":"YES","nameID":"--","icn":"N2016000020"}] 

刪除帶有「TEST1」的記錄並添加「HELLO JOE」。

當我打電話說從我的網頁使用jQuery完全相同的JSON數組，像這樣完全一樣的功能：

//Save the case names (aliases) 
var jsonString = sessionStorage.getItem('caseNames'); 


var str = JSON.stringify(jsonString); 
if (debug == 'true') { 
    alert(str); 
} 

$.ajax({ 
    type: "POST", 
    url: "http://myserver.net/dps/svc/DeadSimple.asmx/SaveCaseNames", 
    data: str, 
    contentType: "application/json; charset=utf-8", 
    dataType: "json", 
    success: function (response) { 
     alert('YAY!!!!!!!!!'); 
    }, 
    failure: function (response) { 
     alert('Fail! ' + response.d); 
    } 
}); 

我得到一個錯誤信息：

{「消息」 ：「無法將類型爲\ u0027System.String \ u0027的對象轉換爲 類型 \ System.Collections.Generic.IDictionary`2 [System.String，System.Object] \ u0027」，「StackTrace」：「 at System。 Web.Script.Serialization.ObjectConverter。 ConvertObjectToTypeInternal（Object o，Type type，JavaScriptSerializer serializer，Boolean throwOnError， Object \ u0026 convertedObject）\ r \ n at System.Web.Script.Serialization.ObjectConverter.ConvertObjectToTypeMain（Object o，Type type，JavaScriptSerializer serializer，Boolean throwOnError， Object \ u0026 convertedObject）\ r \ n at System.Web.Script.Serialization.JavaScriptSerializer.Deserialize [T]（String input）\ r \ n at System.Web.Script.Services.RestHandler.ExecuteWebServiceCall （HttpContext 上下文，WebServiceMethodData methodData）「，」ExceptionType「：」System.InvalidOperationException「}

我試過這個有沒有JSON.stringify，沒有成功。我還包裝了數組，如：var str = JSON.stringify('{data:' + jsonString + '}');，但這使得它更難解析，因爲現在我所追求的對象是更深層次的，並且它無法解決問題。

這是什麼造成的？如果我F5中的Web服務，並直接從瀏覽器調用它，它的工作原理。幫幫我！類庫的目標框架是3.5

Answer 1

那麼，我希望在看到這個receive JSON array as argument in web service之前......

它基本上爲改變函數聲明爲簡單：

Public Function SaveCaseNames(jsn() As cName) As String 

然後你就可以很容易地遍歷整個JSON陣列非常簡單的代碼如下所示：

For Each c As cName In jsn 
    Debug.Print (c.propertyNameOfYourChoice) 
Next 

你只需要請務必格式化正在格式化數組格式正確的JSON字符串。這有點奇怪...它也不能回答爲什麼我以前的嘗試直接從瀏覽器中，而不是從$.ajax調用...