// 尝试答复此界面消息（引发回调方法）。
internal bool TryReply()
{
bool result = false;
if (_NeedReply)
{
UIMessageState state = State;
if (state != UIMessageState.Discarded || (state == UIMessageState.Discarded && _ReplyWhenDiscarded))
{
_ReplyLock.EnterWriteLock();
try
{
ReplyTime = DateTime.Now;
_Sender.Invoke(_CallbackMethod, _Sender, this);
result = true;
}
finally
{
_ReplyLock.ExitWriteLock();
}
}
}
return(result);
}
private object _ReplyData; // 此界面消息的答复数据。
//
// 尝试更新此界面消息的状态。
internal bool TryUpdateState(UIMessageState state)
{
_StateLock.EnterWriteLock();
try
{
switch ((((long)_State) << 32) | (long)state)
{
case (((long)UIMessageState.Created) << 32) | (long)UIMessageState.WaitingToProcess:
{
_RequestTime = DateTime.Now;
_State = state;
}
return(true);
case (((long)UIMessageState.WaitingToProcess) << 32) | (long)UIMessageState.Processing:
{
_ProcessStartTime = DateTime.Now;
_State = state;
}
return(true);
case (((long)UIMessageState.WaitingToProcess) << 32) | (long)UIMessageState.Discarded:
{
_ProcessStartTime = DateTime.Now;
_ProcessFinishTime = DateTime.Now;
_State = state;
}
return(true);
case (((long)UIMessageState.Processing) << 32) | (long)UIMessageState.ProcessCompleted:
{
_ProcessFinishTime = DateTime.Now;
_State = state;
}
return(true);
case (((long)UIMessageState.Processing) << 32) | (long)UIMessageState.ProcessFailed:
{
_ProcessFinishTime = DateTime.Now;
_State = state;
}
return(true);
default:
return(false);
}
}
finally
{
_StateLock.ExitWriteLock();
}
}
/// <summary>
/// 使用消息码初始化 UIMessage 的新实例。
/// </summary>
/// <param name="messageCode">消息码。</param>
public UIMessage(int messageCode)
{
_UidLock.EnterWriteLock();
try
{
_Uid = unchecked (_CurrentMaxUid + 1);
if (_Uid > _MaxUid || _Uid < _MinUid)
{
_Uid = _MinUid;
}
_CurrentMaxUid = _Uid;
}
finally
{
_UidLock.ExitWriteLock();
}
//
_MessageCode = messageCode;
_AllowAsync = false;
_AllowDiscard = false;
_NeedReply = false;
_ReplyWhenDiscarded = false;
_Sender = null;
_CallbackMethod = null;
//
_CreateTime = DateTime.Now;
_RequestTime = DateTime.MaxValue;
_ProcessStartTime = DateTime.MaxValue;
_ProcessFinishTime = DateTime.MaxValue;
_ReplyTime = DateTime.MaxValue;
_State = UIMessageState.Created;
_Exception = null;
//
_RequestData = null;
_ReplyData = null;
}
