winforms 如何在C# Windows窗体应用程序中将Json数据流保存到文本文件?

vu8f3i0k  于 2022-12-14  发布在  C#
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我有一个作为Json文件传入的数据流,我试图将其保存到文本文件中,我已经在下面的这里工作,但是,当我检查文件时,它只保存了最后一个接收到的Json消息,我正在尝试让它保存一行后转到新的一行,并在下面打印最新的Json消息。目前它将打印let's说1000行,但它们都是一样的,它们与最新收到的Json匹配。
任何帮助都将不胜感激。

void ReceiveData() //This function is used to listen for messages from the flight simulator
{
    while (true)
    {
        NetworkStream stream = client.GetStream(); //sets the network stream to the client's stream
        byte[] buffer = new byte[256]; //Defines the max amount of bytes that can be sent
        int bytesRead = stream.Read(buffer, 0, buffer.Length);

        if (bytesRead > 0)
        {
            string jsonreceived = Encoding.ASCII.GetString(buffer, 0, bytesRead); //Converts the received data into ASCII for the json variable
            JavaScriptSerializer serializer = new JavaScriptSerializer();
            TelemetryUpdate telemetry = serializer.Deserialize<TelemetryUpdate>(jsonreceived);
            this.Invoke(new Action(() => { TelemetryReceivedLabel.Text = jsonreceived; 
            })) ;

            Updatelabels(telemetry); //runs the update labels function with the telemetry data as an argument
                
            File.Delete(@"c:\temp\BLACKBOX.txt"); // this deletes the original file
            string path = @"c:\temp\BLACKBOX.txt"; //this stores the path of the file in a string                                  

            using (StreamWriter sw = File.CreateText(path)) // Create a file to write to.
            {
                for (int i = 0; i<10000; i++)
                {
                    sw.Write(jsonreceived.ToString()); //writes the json data to the file
                }
            }
        }
    }
}
vxqlmq5t

vxqlmq5t1#

根据File.CreateText的.NET文档:
建立或开启档案以写入UTF-8编码文字。如果档案已经存在,其内容会被覆写。
因此,每次调用File.CreateText时,您都在创建一个新的StreamWriter,它将覆盖文件的内容。请尝试使用File.AppendText来继续上次的操作。

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