/// <summary>
/// 等待挂起的异步读取完成
/// </summary>
/// <param name="asyncResult">对所等待挂起的异步请求的引用</param>
/// <returns></returns>
public short[] EndRead(IAsyncResult asyncResult)
{
if (asyncResult == null)
{
throw new ArgumentNullException("asyncResult");
}
WaitHandle handle = asyncResult.AsyncWaitHandle;
if (handle != null)
{
try
{
handle.WaitOne();
}
finally
{
handle.Close();
}
}
AsyncLoadDataEventHandler read = asyncResult.AsyncState as AsyncLoadDataEventHandler;
short[] data = read.EndInvoke(asyncResult);
if (data == null)
{
throw new TimeoutException("获取数据超时");
}
return(data);
}
/// <summary>
/// 异步方式获取记录仪数据
/// </summary>
/// <param name="id"></param>
/// <param name="callBack">回调函数</param>
/// <param name="stateObject">异步状态信息</param>
/// <param name="timeOut">超时 默认30秒</param>
/// <returns></returns>
public IAsyncResult BeginRead(short id, AsyncCallback callBack, int timeOut = 30)
{
try
{
AsyncLoadDataEventHandler read = new AsyncLoadDataEventHandler(Read);
return(read.BeginInvoke(id, timeOut, callBack, read));
}
catch (Exception e)
{
// Hide inside method invoking stack
throw e;
}
}
