/// <summary>
/// 跨线程刷新控件
/// </summary>
/// <param name="control">需要刷新的控件</param>
private void RefreshControl(Control control)
{
if (control.InvokeRequired)
{
AsyncRefresh asr = RefreshControl;
control.Invoke(asr, new object[] { control });
}
else
{
control.Refresh();
}
}
private async void RefreshTimer_Tick(object sender, EventArgs e)
{
AsyncRefresh asyncrefresh = new AsyncRefresh(ChatRoomService.GetMessages); // 1/2
//asyncrefresh.BeginInvoke(CallBack, null); // 1.AMP
// 2.TAP
IEnumerable <MessageInfo> messageInfos = await Task.Factory.FromAsync(asyncrefresh.BeginInvoke, asyncrefresh.EndInvoke, null);
StringBuilder strText = new StringBuilder();
foreach (var message in messageInfos)
{
strText.AppendLine(string.Format("{0} {1} 说:", message.UserName, message.MessageTime));
strText.AppendLine(" " + message.MsgContent);
strText.AppendLine();
}
this.txtMessages.Text = strText.ToString();
}
public void CallBack(IAsyncResult result)
{
//AsyncRefresh asyncRefresh = result.AsyncState as AsyncRefresh;这一句和下面两句作用一致
AsyncResult asyncResult = result as AsyncResult;
AsyncRefresh asyncRefresh = asyncResult.AsyncDelegate as AsyncRefresh;
var messageInfos = asyncRefresh.EndInvoke(result);
StringBuilder strText = new StringBuilder();
foreach (var message in messageInfos)
{
strText.AppendLine(string.Format("{0} {1} 说:", message.UserName, message.MessageTime));
strText.AppendLine(" " + message.MsgContent);
strText.AppendLine();
}
Action action = () => { this.txtMessages.Text = strText.ToString(); };
this.txtMessages.Invoke(action);
}