读取DataTable时ASP.NET C＃意外的JSON令牌

问题描述

我正在ASP.NET中工作，尝试将JSON字符串序列化到DataTable时遇到此错误：

读取DataTable时出现意外的JSON令牌。预期的StartArray，得到了 StartObject

我已经阅读了具有相同错误的其他帖子，并且当JSON对象无效时，似乎通常会发生该错误。但是，我已经在JsonLint中验证了JSON，这很好。我不是在构造JSON，而是从Paysimple API接收它。我在软件的其他部分也使用了非常类似的方法，并且工作正常，所以我不知所措地解释了为什么错误出现在这里。

任何帮助将不胜感激。我没有使用JSON的丰富经验。

这是我的代码：

protected void LoadPaymentSchedule(int customerId)
{
    // This method returns an object from Paysimple's API
    RecurringPaymentResponse recurringPayment = StudioPaymentAccess.GetStudioPaymentSchedule(customerId);

    // Convert the Json response to DataTable
    string a = JsonConvert.SerializeObject(recurringPayment);
    DataTable tblSchedules = JsonConvert.DeserializeObject<DataTable>(a);//**error occurs here

    // Bind to gridview
    if (tblSchedules.Rows.Count > 0)
    {
        grdPaymentSchedules.DataSource = tblSchedules;
        grdPaymentSchedules.DataBind();
    }
    else
    {
        //No schedules found
    }

}

这是 StudioPaymentAccess.GetStudioPaymentSchedule（customerId）

上面的方法返回的JSON。

{
"CustomerId": 1149814,"CustomerFirstName": "Evan W","CustomerLastName": "Studio4","CustomerCompany": null,"NextScheduleDate": "2020-11-16T07:00:00Z","PauseUntilDate": null,"FirstPaymentDone": false,"DateOfLastPaymentMade": "2020-10-16T06:00:00Z","TotalAmountPaid": 10.0,"NumberOfPaymentsMade": 1,"EndDate": "2021-10-16T06:00:00Z","PaymentAmount": 10.0,"PaymentSubType": "Moto","AccountId": 1184647,"InvoiceNumber": null,"OrderId": null,"FirstPaymentAmount": 0.0,"FirstPaymentDate": null,"StartDate": "2020-10-16T06:00:00Z","ScheduleStatus": "Active","ExecutionFrequencyType": "SpecificDayofMonth","ExecutionFrequencyParameter": 16,"Description": " ","Id": 181512,"LastModified": "2020-10-16T07:30:43Z","CreatedOn": "2020-10-15T18:11:22Z"  }

解决方法

看起来是为了反序列化DataTable（期望的JSON should be an array）。

一种快速的解决方法是调整序列化以便写出一个数组：

string a = JsonConvert.SerializeObject(new[] { recurringPayment });

另一种选择是直接绑定到返回模型，假设不需要DataTable。例如，请参见Binding an ASP.NET GridView Control to a string array的答案。

,

您是否正在尝试将RecurringPaymentResponse对象反序列化为System.Data.DataTable？ 如果您尝试将RecurringPaymentResponse对象反序列化为System.Data.DataTable，则它肯定会失败。由于两个类的属性不相同。

您应该直接更新gridview行

GridViewRow row = (GridViewRow) GridView1.Rows[0]; //First row
row.Cells[0].Text = recurringPayment.CustomerId;
row.Cells[1].Text = recurringPayment.CustomerFirstName;
row.Cells[2].Text = recurringPayment.CustomerLastName;
//and so on.....

DataTable期望数组为...

{
    "data":
    [
        {"ID":1,"Name":"Simon"},{"ID":2,"Name":"Alex"}
    ]
}

,

我尝试反序列化，但是没有发生错误，反序列化运行成功。 https://pythonprogramming.altervista.org/platform-game-in-detail-part-1/?doing_wp_cron=1603309265.4902870655059814453125