/// <summary>
/// 初始化组件并指定等待窗体
/// </summary>
/// <param name="fmWait">等待窗体</param>
public BackgroundWorkerUI(IWaitForm fmWait)
{
if (fmWait == null)
{
throw new ArgumentNullException();
}
_waitForm = fmWait;
}
/// <summary>
/// 执行委托并显示自定义等候窗体
/// </summary>
public static object RunDelegate(IWaitForm fmWait, Delegate del, params object[] args)
{
//利用AutoResetEvent.WaitOne的原子性，防止重入
if (!_areForWhole.WaitOne(0))
{
throw new WorkIsBusyException();
}
_isRunning = true;
try
{
if (fmWait == null)
{
throw new ArgumentNullException("fmWait");
}
if (del == null || del.GetInvocationList().Length != 1)
{
throw new ApplicationException("委托不能为空，且只能绑定1个方法！");
}
if (args == null)
{
throw new ArgumentNullException("args");
}
Reset();
_waitForm = fmWait;//需在开始异步任务前赋值，因为异步中可能用到
//更新上下文为UI线程上下文，因为如果在Main中Run，先前拿到的上下文也许时null，
//会导致在异步完成时用Post关闭窗体抛异常
_waitForm.Shown += (S, E) => _syncContext = SynchronizationContext.Current;
StartAsync(del, args);
Thread.Sleep(50); //给异步任务一点时间，如果在此时间内完成，就不弹窗
if (!_isCompleted)
{
//这里有可能出现异步先把wf关了的情况，所以要吃掉这种异常
try { _waitForm.ShowDialog(); }
catch (ObjectDisposedException) { }
}
//返回
if (Cancelled)
{
throw new WorkCancelledException();
}
if (_exception != null)
{
throw _exception;
}
return(_result);
}
finally
{
Release();
_areForWhole.Set();
_isRunning = false;
}
}
/// <summary>
///
/// </summary>
public void CloseSplashScreen()
{
if (m_waitFormInstance != null && ((Form)m_waitFormInstance).IsDisposed == false)
{
m_waitFormInstance.CloseWaitForm();
}
m_waitFormInstance = null;
m_thread = null;
}
/// <summary>
/// 初始化组件并指定等待窗体
/// </summary>
/// <param name="fmWait">等待窗体</param>
public BackgroundWorkerUI(IWaitForm fmWait)
{
if (fmWait == null)
{
throw new WaitFormNullException();
}
waitForm = fmWait;
waitForm.UserCancelling += WaitForm_UserCancelling;//注册用户取消任务事件
}
private void InternalShowSplashScreen()
{
if (m_waitFormInstance == null)
{
m_waitFormInstance = (IWaitForm)Activator.CreateInstance(m_typeWaitForm);
m_waitFormInstance.SetCaption(Caption);
m_waitFormInstance.SetDescription(Description);
m_waitFormInstance.ShowWaitForm();
}
}
/// <summary>
/// 释放资源
/// </summary>
private static void Release()
{
Tag = null;
_prmsInput = null;//这里不会影响调用者传入的object[]实例，因为不是ref进来的
_prmsMethod = null;
//先置null再慢慢dispose，因为方案中多处地方依赖null判断，
//就怕判断不为空时正在销毁
var fm = _waitForm;
_waitForm = null;
fm.Dispose();
}
/// <summary>
/// 执行方法并显示自定义等候窗体
/// </summary>
public static TResult RunFunc <T1, T2, T3, T4, T5, T6, T7, T8, TResult>(IWaitForm fmWait, Func <T1, T2, T3, T4, T5, T6, T7, T8, TResult> method, T1 arg1, T2 arg2, T3 arg3, T4 arg4, T5 arg5, T6 arg6, T7 arg7, T8 arg8)
{
return((TResult)RunDelegate(fmWait, method, arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8));
}
/// <summary>
/// 执行方法并显示自定义等候窗体
/// </summary>
public static TResult RunFunc <T, TResult>(IWaitForm fmWait, Func <T, TResult> method, T arg)
{
return((TResult)RunDelegate(fmWait, method, arg));
}
/// <summary>
/// 执行方法并显示自定义等候窗体
/// </summary>
public static TResult RunFunc <T1, T2, T3, T4, TResult>(IWaitForm fmWait, Func <T1, T2, T3, T4, TResult> method, T1 arg1, T2 arg2, T3 arg3, T4 arg4)
{
return((TResult)RunDelegate(fmWait, method, arg1, arg2, arg3, arg4));
}
/// <summary>
/// 执行方法并显示自定义等候窗体
/// </summary>
public static void RunAction <T1, T2, T3, T4, T5, T6, T7, T8>(IWaitForm fmWait, Action <T1, T2, T3, T4, T5, T6, T7, T8> method, T1 arg1, T2 arg2, T3 arg3, T4 arg4, T5 arg5, T6 arg6, T7 arg7, T8 arg8)
{
RunDelegate(fmWait, method, arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8);
}
/// <summary>
/// 执行方法并显示自定义等候窗体
/// </summary>
public static void RunAction <T1, T2, T3, T4, T5>(IWaitForm fmWait, Action <T1, T2, T3, T4, T5> method, T1 arg1, T2 arg2, T3 arg3, T4 arg4, T5 arg5)
{
RunDelegate(fmWait, method, arg1, arg2, arg3, arg4, arg5);
}
/// <summary>
/// 执行方法并显示自定义等候窗体
/// </summary>
public static void RunAction <T1, T2, T3>(IWaitForm fmWait, Action <T1, T2, T3> method, T1 arg1, T2 arg2, T3 arg3)
{
RunDelegate(fmWait, method, arg1, arg2, arg3);
}
/// <summary>
/// 执行方法并显示自定义等候窗体
/// </summary>
public static void RunAction <T>(IWaitForm fmWait, Action <T> method, T arg)
{
RunDelegate(fmWait, method, arg);
}
/// <summary>
/// 执行方法并显示自定义等候窗体
/// </summary>
public static void RunAction(IWaitForm fmWait, Action method)
{
RunDelegate(fmWait, method);
}
