无法运行web API

Question

我有两个web-apis

 public string GetRData(string data)
    {
        var serialPort = new SerialPort("COM1", 9600, Parity.Even, 8, StopBits.One);

        try
        {
            if(serialPort.IsOpen)
            {
                var stream = new SerialStream(serialPort);
                stream.ReadTimeout = 2000;

                //byte[] bytestoread = new byte[9999];
                byte[] bytestosend = StringToByteArray(data);

                serialPort.Write(bytestosend, 0, bytestosend.Length);
                //receiveData = serialPort.ReadExisting();

                serialPort.Close();
            }
            else
            {
                //serial port settings and opening it
                serialPort.Open();
                var stream = new SerialStream(serialPort);
                stream.ReadTimeout = 2000;

                //byte[] bytestoread = new byte[9999];
                byte[] bytestosend = StringToByteArray(data);

                serialPort.Write(bytestosend, 0, bytestosend.Length);
                //receiveData = serialPort.ReadExisting();

                serialPort.Close();
            }                         

        }
        catch(Exception ex)
        {

        }


        return data;
    }

    public string GetPData(string id)
    {
        var serialPort = new SerialPort("COM2", 9600, Parity.Even, 8, StopBits.One);
        string receiveData = "";
        try
        {
            //serial port settings and opening it
            serialPort.Open();

            var stream = new SerialStream(serialPort);
            stream.ReadTimeout = 2000;

            //byte[] bytestoread = new byte[9999];
            //byte[] bytestosend = StringToByteArray(data);

            //serialPort.Write(bytestosend, 0, bytestosend.Length);
            receiveData = serialPort.ReadExisting();

            serialPort.Close();


        }
        catch (Exception ex)
        {

        }


        return receiveData;
    }

WebApiConfig.cs

 config.Routes.MapHttpRoute(
       name: "GetRData",
       routeTemplate: "api/{controller}/{action}/{data}",
       defaults: null

       );

        config.Routes.MapHttpRoute(
      name: "GetPData",
      routeTemplate: "api/{controller}/{action}/{id}",
      defaults: new { id = RouteParameter.Optional }

      );

每当我试图点击GetPData时，我就会在Postman中得到以下响应

{“消息”：“没有找到与请求URI‘https://localhost:44337/api/rtu/GetPData/1’匹配的HTTP资源。”、"MessageDetail"：“在与请求匹配的控制器'RTU‘上没有找到任何操作。”}

我一直在寻找这个问题，但却找不到解决办法。

注意： GetRData运行得很好

Answer 1

您正在URI中包含操作，而不是依赖约定进行路由匹配，因此您应该添加属性来显式指定允许的HTTP谓词：

[HttpGet]
public string GetPData(string id)

话虽如此，您的动作确实以"Get“开头，因此应该是它与之匹配的动词。您应该确保请求是"GET“。否则，路由看起来没问题。你试过用URL点击它吗：

https://localhost:44337/api/rtu/GetPData?id=1