async Task <bool> DetectUser()
{
string strError = "";
EnableControls(false);
try
{
using (MessageConnectionCollection _channels = new MessageConnectionCollection())
{
_channels.Login += _channels_Login;
MessageConnection connection = await _channels.GetConnectionAsyncLite(
this.textBox_url.Text,
"");
CancellationToken cancel_token = _cancel.Token;
string id = Guid.NewGuid().ToString();
GetMessageRequest request = new GetMessageRequest(id,
"",
"gn:<default>", // "" 表示默认群组
"",
"",
"",
"",
"",
0,
1);
GetMessageResult result = await connection.GetMessageAsyncLite(
request,
new TimeSpan(0, 1, 0),
cancel_token);
if (result.Value == -1)
{
strError = "检测用户时出错: " + result.ErrorInfo;
goto ERROR1;
}
return(true);
}
}
catch (MessageException ex)
{
if (ex.ErrorCode == "Unauthorized")
{
strError = "以用户名 '" + ex.UserName + "' 登录时, 用户名或密码不正确";
goto ERROR1;
}
if (ex.ErrorCode == "HttpRequestException")
{
strError = "dp2MServer URL 不正确，或 dp2MServer 尚未启动";
goto ERROR1;
}
strError = ex.Message;
goto ERROR1;
}
catch (AggregateException ex)
{
strError = MessageConnection.GetExceptionText(ex);
goto ERROR1;
}
catch (Exception ex)
{
strError = ex.Message;
goto ERROR1;
}
finally
{
EnableControls(true);
}
ERROR1:
this.Invoke(new Action(() =>
{
MessageBox.Show(this, strError);
}));
return(false);
}
