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c# - 从另一个程序接收 JSON 编码信息到我的 GUI

问题描述

我需要从另一个程序接收 JSON 信息并将其显示在我的 GUI 中。我刚刚使用的当前代码使程序崩溃。我已经研究了大约一周的问题，但似乎找不到解决方案。

这段代码应该从程序接收信息并反序列化数据。

public void TelemetryUpdateReceived()
{
        TelemetryUpdate tUpdate;
        NetworkStream stream = client.GetStream();
        byte[] buffer = new byte[256];
        JavaScriptSerializer javaScriptSerializer = new JavaScriptSerializer();

        while (client != null)
        {
            int num_bytes = 0;
            num_bytes = stream.Read(buffer, 0, 256);
            string message = Encoding.ASCII.GetString(buffer, 0, num_bytes);
            DisplayMessages(message);

            tUpdate = javaScriptSerializer.Deserialize<TelemetryUpdate>(message);
            data.Altitude = tUpdate.Altitude;
            data.Elevator = tUpdate.ElevatorPitch;
            data.Pitch = tUpdate.Pitch;
            data.Speed = tUpdate.Speed;
            data.Throttle = tUpdate.Throttle;
            data.VerticalSpeed = tUpdate.VerticalSpeed;
            data.WarningCode = tUpdate.WarningCode;
        } 
}

我还有一个类来获取和设置数据。

class getData
{
        public double Altitude { get; set; }
        public double Speed { get; set; }
        public double Pitch { get; set; }
        public double VerticalSpeed { get; set; }
        public double Throttle { get; set; }
        public double Elevator { get; set; }
        public int WarningCode { get; set; }
}

struct TelemetryUpdate
{
        public double VerticalSpeed;
        public double Throttle;
        public double Altitude;
        public double Speed;
        public double Pitch;
        public double ElevatorPitch;
        public int WarningCode;
}

编辑：我忘记添加错误消息屏幕截图我得到的错误消息

编辑 2：这是我用来显示数据的代码

private void DisplayMessages(string messageJ)
    {
        ListViewItem listViewItem = new ListViewItem(new string[] { messageJ });
        this.lstBoxLatestData.Items.Insert(0, listViewItem);
        if (this.lstBoxLatestData.Items.Count > 40)
        {
            lstBoxLatestData.Items.RemoveAt(lstBoxLatestData.Items.Count - 1);
        }

    }

设置断点后，这是一个使用“无效 JSON 原语”消息引发异常的 JSON 示例：

{"Altitude":-1.2874016160000004,"Speed":0,"Pitch":0,"VerticalSpeed":0,"Throttle":0,"ElevatorPitch":0,"WarningCode":0}
{"Altitude":-1.2874016160000004,"Speed":0,"Pitch":0,"VerticalSpeed":0,"Throttle":0,"ElevatorPitch":0,"WarningCode":0}

标签： c#multithreadinguser-interfacenetworkstream

解决方案

那不是有效的 JSON。它应该是：

  • 单个元素
{
    "Altitude":-1.2874016160000004,
    "Speed":0,
    "Pitch":0,
    "VerticalSpeed":0,
    "Throttle":0,
    "ElevatorPitch":0,
    "WarningCode":0
}
  • 对象数组。

注意：在这种情况下，您还应该更改C#结构以存储数组，最近的 Visual Studio 版本确实具有您可以使用的“将 JSON 粘贴为类”功能

[
    {
        "Altitude":-1.2874016160000004,
        "Speed":0,
        "Pitch":0,
        "VerticalSpeed":0,
        "Throttle":0,
        "ElevatorPitch":0,
        "WarningCode":0
    },
    {
        "Altitude":-1.2874016160000004,
        "Speed":0,
        "Pitch":0,
        "VerticalSpeed":0,
        "Throttle":0,
        "ElevatorPitch":0,
        "WarningCode":0
    }
]

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