AJAX json返回导致Uncaught SyntaxError：意外的令牌

Question

嘿所有我不知道为什么我会收到以下错误：

  

未捕获的SyntaxError：意外的令牌

从AJAX调用中获取我的JSON字符串时。

我的AJAX代码是：

$.ajax({
   type: "POST",
   crossDomain: true,
   dataType: 'json',
   cache: false,
   contentType: "application/json",
   url: serviceURL,
   data: JSON.stringify({ febData: ["LIST"] }),
   success: function (data) {
         var obj = $.parseJSON(data);
         //console.log(data);             
      },
   error: function (xhr, status, error) {
      console.log(xhr.responseText);
   }
});  

错误在线：

$.parseJSON(data)

我返回的JSON如下所示（使用console.log（数据）时）：

[{
        "RowTitle" : "1 A Test",
        "FormName" : "F_Form1",
        "ID" : "9d91523e-5e76-47bf-860d-3bbb41933b74"
    }, {
        "RowTitle" : "1 A Test",
        "FormName" : "F_Form1",
        "ID" : "9d91523e-5e76-47bf-860d-3bbb41933b74"
    }, {
        "RowTitle" : "1 Diagnostic",
        "FormName" : "F_Form1",
        "ID" : "a97847c9-acf3-4719-8109-91bf3772c2ba"
    }, {
        "RowTitle" : "1 poll - copy",
        "FormName" : "F_Form1",
        "ID" : "435cbb7b-c3dd-43f4-84aa-61a343d6abe9"
    }, {
        "RowTitle" : "1 poll - copy",
        "FormName" : "F_Form1",
        "ID" : "435cbb7b-c3dd-43f4-84aa-61a343d6abe9"
    }, {
        "RowTitle" : "1 poll idea",
        "FormName" : "F_Form1",
        "ID" : "2fd81b31-d648-4e40-8019-a7967bb190de"
    }, {
        "RowTitle" : "1 poll idea",
        "FormName" : "F_Form1",
        "ID" : "2fd81b31-d648-4e40-8019-a7967bb190de"
    }, {
        "RowTitle" : "2015 Family Holiday Gathering",
        "FormName" : "F_Form1",
        "ID" : "9ae2d44f-8e65-465a-8802-e2ad4408afd2"
    }
]

我通过我的.net网络服务返回JSON：

Dim jsonResults As String = "["

For value As Integer = 0 To result_RowTitle.Length - 1
   jsonResults += "{""RowTitle"":""" & result_RowTitle(value) & ""","
   jsonResults += """FormName"":""" & result_rowFormName(value) & ""","
   jsonResults += """ID"":""" & result_RowIDs(value) & """},"
Next

jsonResults = jsonResults.Trim().Substring(0, jsonResults.Length - 1) & "]"

Dim strResponse As String = ser.Serialize(jsonResults)

Context.Response.Clear()
Context.Response.ContentType = "application/json"
Context.Response.AddHeader("content-length", strResponse.Length.ToString())
Context.Response.Flush()
Context.Response.Write(strResponse)
HttpContext.Current.ApplicationInstance.CompleteRequest()

任何人都可以看到可能导致错误的地方？

网络截图请求

根据建议创建类：

Private Class febForms
    Public Property RowTitle As String
    Public Property FormName As String
    Public Property ID As String
End Class

Dim febFormData As New List(Of febForms)

For value As Integer = 0 To result_RowTitle.Length - 1
   Dim febforms As New febForms

   With febforms
      .RowTitle = result_RowTitle(value)
      .FormName = result_rowFormName(value)
      .ID = result_RowIDs(value)
   End With

   febFormData.Add(febforms)
Next

Dim strResponse As String = ser.Serialize(febFormData)

Context.Response.Clear()
Context.Response.ContentType = "application/json"
Context.Response.AddHeader("content-length", strResponse.Length.ToString())
Context.Response.Flush()
Context.Response.Write(strResponse)
HttpContext.Current.ApplicationInstance.CompleteRequest()

Answer 1

<。> .Net字符串是多字节的，因此字符串长度与发送到流的内容长度不同。这可能意味着您在客户端上的解析不处理完整的JSON，因为字符数小于字节数意味着它被修剪。

服务器上的这样的东西可能会有所帮助：

Encoding encoding = HttpContext.Current.Response.ContentEncoding;
byte[] buffer = encoding.GetBytes(strResponse);
Context.Response.OutputStream.Write(buffer,0,buffer.Length);

您的标题大小值应为buffer.length。

Answer 2

不要手工构建JSON。使用JSON序列化程序来序列化类，以确保您的JSON实际上有效。

您还需要将for (int row = 0; row < array.length; row++) { for (int col = 0; col < array[row].length; col++) { arrayShifted[row][col] = array[row][(col + 1) % array[row].length] } } 设置为UTF8字节的长度。使用Content-Length。