如何独立执行数据库操作

我有1 exe，它完全不是Windows form，它将在后台连续运行，并且watch my serial port和我有一个事件data receive event which fires as my serial port receive data。

一旦我收到此事件中的数据，我就会将此数据传递给另一个事件处理程序saves this data in database through web api method。

但是到我的串行端口的数据会经常到来，所以我想独立地将这些数据保存到我的数据库中，这样我的数据库插入操作就不会阻止我传入的串行端口数据。

这是我的代码：

void _serialPort_DataReceived(object sender, SerialDataReceivedEventArgs e)//Fires as my serial port receives data
{
    int dataLength = _serialPort.BytesToRead;
    byte[] data = new byte[dataLength];
    int nbrDataRead = _serialPort.Read(data, 0, dataLength);
    if (nbrDataRead == 0)
        return;
    // Send data to whom ever interested
    if (NewSerialDataRecieved != null)
    {
        NewSerialDataRecieved(this, new SerialDataEventArgs(data)); //pass serial port data to new below event handler.
    }
}

void _spManager_NewSerialDataRecieved(object sender, SerialDataEventArgs e) //I want this event handler to run independently so that database save operation doenst block incoming serial port data
{
    if (this.InvokeRequired)
    {
        // Using this.Invoke causes deadlock when closing serial port, and BeginInvoke is good practice anyway.
        this.BeginInvoke(new EventHandler<SerialDataEventArgs>(_spManager_NewSerialDataRecieved), new object[] { sender, e });
        return;
    }
    //data is converted to text
    string str = Encoding.ASCII.GetString(e.Data);
    if (!string.IsNullOrEmpty(str))
    {
            //This is where i will save data to through my web api method.
            RunAsync(str).Wait();
    }
}
static async Task RunAsync(string data)
{
    using (var client = new HttpClient())
    {
        client.BaseAddress = new Uri("http://localhost:33396/");
        client.DefaultRequestHeaders.Accept.Clear();
        client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
        var content = new StringContent(data);
        var response = await client.PostAsJsonAsync<StringContent>("api/Service/Post", content);//nothing happens after this line.
    }
}

Web api控制器：

public class MyController : ApiController
{
    [HttpPost]
    public HttpResponseMessage Post(HttpRequestMessage request)
    {
        var someText = request.Content.ReadAsStringAsync().Result;
        return new HttpResponseMessage() { Content = new StringContent(someText) };
    }
}

但这里的问题是：

var response = await client.PostAsJsonAsync<StringContent>("api/Service/Post", content);

这一行之后没有发生任何操作块。

有人能指导我吗？

// build the api client, you may want to keep this in a higher scope to avoid recreating on each message
var api = new HttpClient();
api.BaseAddress = new Uri(someConfigVariable);
// asynchronously make the call and handle the result
api.PostAsJsonAsync("api/My", str)
    .ContinueWith(t => HandleResponseAsync(t.Result))
    .Unwrap();

// in your EF code you will have something like this ...
Public async Task<User> SaveUser(User userModel)
{
   try
  {
      var newUser = await context.Users.AddAsync(userModel);
      context.SavechangesAsync();
      return newUser;
  }
  catch(Exception ex) {}
}
// and in your WebAPI controller something like this ...
HttpPost]
public async Task<HttpResponseMessage> Post(User newUser)
{
     return Ok(await SaveUser(newUser));
}