//程序入口
private void Run()
{
//实例化委托并初赋值
DelegateName dn = new DelegateName(MethodName);
//输出参数
int i;
//实例化回调方法
//把AsyncCallback看成Delegate你就懂了，实际上AsyncCallback是一种特殊的Delegate，就像Event似的
AsyncCallback acb = new AsyncCallback(CallBackMethod);
//异步开始
//如果参数acb换成null则表示没有回调方法
//最后一个参数dn的地方，可以换成任意对象，该对象可以被回调方法从参数中获取出来，写成null也可以。
//参数dn相当于该线程的ID，如果有多个异步线程，可以都是null，但是绝对不能一样，不能是同一个object，否则异常
IAsyncResult iar = dn.BeginInvoke(1, out i, acb, dn);
//去做别的事
//…………
using (StreamWriter sw = File.AppendText(@"C:\dsData.txt"))
{
sw.WriteLine(DateTime.Now.Ticks + "干别的事去喽！");
sw.Flush();
sw.Close();
}
}
private static void AsyncWays_NormalSvc()
{
//实例化委托并初赋值
DelegateName dn = new DelegateName(NormalCompute);
//实例化回调方法
AsyncCallback acb = new AsyncCallback(CallBackMethod);
//异步开始
//如果参数acb 换成 null 则表示没有回调方法
//最后一个参数 dn 的地方，可以换成任意对象，该对象可以被回调方法从参数中获取出来，写成 null 也可以。参数 dn 相当于该线程的 ID，如果有多个异步线程，可以都是 null，但是绝对不能一样，不能是同一个 object，否则异常
IAsyncResult iar = dn.BeginInvoke(acb, dn);
}
public void InvokeHandle(string text)
{
try
{
DelegateName dlName = new DelegateName(GetCurrentName);
BeginInvoke(dlName, text);
}
catch (Exception ex)
{
throw ex;
}
}
private static void RegisterAndCallDelegates()
{
string message = "Leandro Andrioli";
// Create an instance of the delegate
DelegateName del = new DelegateName(DisplayOne);
//Calling the delegate
del(message);
// Another way if declaration
DelegateName delTwo = DisplayTwo;
delTwo.Invoke(message);
}
static void Main(string[] args)
{
MyDelegate dlg = new MyDelegate();
dlg.GetName("Shahane");
//int age=MyDelegate.GetAge(24);
//WriteLine(age);
DelegateName dg = new DelegateName(dlg.GetName);
dg("Garik");
DelegateAge gd = new DelegateAge(MyDelegate.GetAge);
int age = gd(24);
WriteLine(age);
}
//程序终点
//异步完成时，执行的方法（回调方法），此方法只能有IAsyncResult一个参数，但是该参数几乎万能，可以传递object
private void CallBackMethod(IAsyncResult ar)
{
//从异步状态ar.AsyncState中，获取委托对象
DelegateName dn = (DelegateName)ar.AsyncState;
//输出参数
int i;
//一定要EndInvoke，否则你的下场很惨
string r = dn.EndInvoke(out i, ar);
using (StreamWriter sw = File.AppendText(@"C:\dsData.txt"))
{
sw.WriteLine(DateTime.Now.Ticks + Convert.ToString("异步完成喽！i的值是" + i.ToString() + ",r的值是" + r));
sw.Flush();
sw.Close();
}
}
static void Main(string[] args)
{
//wywołuyjemy funkcję:
SomeFunction2(SomeFunction1);
//przypisanie zmiennej do funkcji:
var someVar = new DelegateName(SomeFunction1);
// wywołanie zmiennej:
someVar();
//funkcje anonimowe, bez towrzenia funkcji "na sztywno", tylko wpisując ją w deklaracji delegata:
Delegate2 someVar2 = delegate(int a) { return(2); };
// używając lambda (jest traktowana jako OBIEKT):
Delegate2 someVar3 = (int a) => { return(2); };
// po lewej stronie wyrażenia lambda parametry (jak nie ma używamy "()"), po prawej wyrażenie lub blok poleceń
// najprosztsza postać:
Delegate2 someVar4 = (a) => 2;
// zamiast używać delegate public delegate int Delegate2(int a); możemy użyć Action, jeżeli funkcja nic nie zwraca,
// albo Func, jeżeli zwraca:
Action <int> someVar5 = (a) => { };
Func <int, int> someVar6 = (a) => 5;
Func <int, int> someVar7 = (a) => { return(5); };
// praktyczny przykład:
var listOfStrings = new List <string>
{
"a", "b", "c", "d", "e", "f"
};
// funkcja -> pierwszy string, który zaczyna się od litery "b", wykorzystamy lambdę"
var machingExpression = GetFirstOrDefault(listOfStrings, (someString) => { return(someString.StartsWith("b")); });
Console.WriteLine(machingExpression);
}
private void RegisterAndCallMulticastDelegates()
{
string msg = "Leandro";
//Create delegate
DelegateName del = DisplayOne;
//Multicast delegate
del += DisplayTwo;
//calling delegate
del(msg);
foreach (DelegateName item in del.GetInvocationList())
{
//invoke each method, and display return value
item(msg);
}
//remove method's reference
del -= DisplayOne;
del(msg);
}
private void AutoLogin()
{
string[] lastEmployee = db_EmployeeLoginDao.getLastAutoLogin();
if (lastEmployee != null && lastEmployee[2] == "1") //如果最后一次登录的账号为自动登录
{
this.BeginInvoke(new Action(delegate() { cbMember.Checked = true; btnLogin.Enabled = false; tbCard.Text = lastEmployee[0]; }));
IAsyncResult r = new DelegateName(new Action(delegate
{
autoLoginTimer = new System.Timers.Timer();
autoLoginTimer.Interval = 1000;
autoLoginTimer.Elapsed += (sender, e) =>
{
if (waittimes > 0)
{
this.BeginInvoke(new Action(delegate() { _ShowInfo((waittimes - 1) + "秒后自动登录，取消勾选则自动登录取消．", Color.Blue); waittimes--; }));
}
else
{
allDone.Set();
}
};
autoLoginTimer.Start();
})).BeginInvoke(null, null);
allDone.WaitOne();
llgin(lastEmployee);
}
if (lastEmployee == null || lastEmployee[2] == "0" || MainStaticData.autoLoginSucc != true) //没有自动登录的账户,弹出登录框, 或者自动登录没有成功，也弹出登录框
{
this.Invoke(new Action(delegate() { btnLogin.Enabled = true; if (lastEmployee != null && lastEmployee.Length > 0)
{
tbCard.Text = lastEmployee[0];
}
}));
}
}
private static void SomeFunction2(DelegateName delegateName)
{
}
//程序入口
private void Run()
{
//实例化委托并初赋值
DelegateName dn = new DelegateName(MethodName);
//输出参数
int i;
//实例化回调方法
//把AsyncCallback看成Delegate你就懂了，实际上AsyncCallback是一种特殊的Delegate，就像Event似的
AsyncCallback acb = new AsyncCallback(CallBackMethod);
//异步开始
//如果参数acb换成null则表示没有回调方法
//最后一个参数dn的地方，可以换成任意对象，该对象可以被回调方法从参数中获取出来，写成null也可以。
//参数dn相当于该线程的ID，如果有多个异步线程，可以都是null，但是绝对不能一样，不能是同一个object，否则异常
IAsyncResult iar = dn.BeginInvoke(1, out i, acb, dn);
//去做别的事
//…………
using (StreamWriter sw = File.AppendText(@"C:\dsData.txt"))
{
sw.WriteLine(DateTime.Now.Ticks + "干别的事去喽！");
sw.Flush();
sw.Close();
}
}
private void btnUpdate_Click(object sender, EventArgs e)
{
try
{
if (isRunning == false)
{
prgUpdate.Value = 0;
int totals = 0;
int updated = 0;
int updateError = 0;
lblMovie.Text = "";
if (DataOperation.IsConnected() == true)
{
bool ignore = chkIgnore.Checked;
bool image = chkImage.Checked;
bool rate = chkRate.Checked;
bool link = chkLink.Checked;
bool year = chkYear.Checked;
bool duration = chkDuration.Checked;
bool story = chkStory.Checked;
bool genre = chkGenre.Checked;
bool director = chkDirector.Checked;
bool directorPhoto = chkDirectorPhoto.Checked;
bool actor = chkActors.Checked;
bool actorPhoto = chkActorPhoto.Checked;
bool language = chkLanguage.Checked;
DateTime?fromDate = null;
DateTime?toDate = null;
if (this.datePickFrom.Checked)
{
fromDate = this.datePickFrom.Value;
}
if (this.datePickTo.Checked)
{
toDate = this.datePickTo.Value;
}
DataTable dtMovies = new DataTable();
if (image == true || rate == true || link == true || year == true || duration == true ||
story == true || genre == true || director == true || directorPhoto == true ||
language == true || actor == true || actorPhoto == true)
{
string logName = "iMovie Update Log [" + Helper.GetShortDateTimeString().Replace(":", "-") + "].txt";
iMovieBase.log.Path = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.Desktop), logName);
dtMovies = Movie_SP.GetList(true, fromDate, toDate);
Movie[] movieList = Movie.FetchAllMovie(dtMovies);
prgUpdate.Maximum = movieList.Length;
SecondThread = new Thread(
new ThreadStart(() =>
{
try
{
enUpdateResult result = enUpdateResult.UpdateError;
int BannedIP = 0;
int ConnectionLost = 0;
int UpdateError = 0;
isRunning = true;
this.exitRequest = false;
foreach (Movie m in movieList)
{
if (this.exitRequest == false)
{
totals++;
DelegateName dlName = new DelegateName(GetCurrentName);
BeginInvoke(dlName, "Updating: " + m.FullTitle);
result = Movie_SP.UpdateOnline(m, image, rate, link, year, duration, story, genre,
director, directorPhoto, language, actor, actorPhoto, ignore, true, false, null);
if (result == enUpdateResult.Updated)
{
updated++;
}
else if (result == enUpdateResult.NotOpen ||
result == enUpdateResult.UpdateError)
{
updateError++;
}
if (result == enUpdateResult.NotOpen)
{
if (DataOperation.IsConnected() == true)
{
BannedIP++;
ConnectionLost = 0;
}
else
{
ConnectionLost++;
BannedIP = 0;
}
}
if (result == enUpdateResult.UpdateError)
{
UpdateError++;
}
else if (result != enUpdateResult.NoNeedUpdate &&
result != enUpdateResult.UpdateError)
{
UpdateError = 0;
}
if (chkWarn.Checked == true)
{
if (UpdateError >= 20)
{
if (MessageBox.Show(Messages.CheckInternet.Replace(@"\n", Environment.NewLine).Replace("@NUM@", UpdateError.ToString()), Messages.MessageBoxTitle, MessageBoxButtons.RetryCancel, MessageBoxIcon.Question) == DialogResult.Cancel)
{
this.exitRequest = true;
}
UpdateError = 0;
}
else if (ConnectionLost >= 8)
{
MessageBox.Show(Messages.NotConnected, Messages.MessageBoxTitle, MessageBoxButtons.OK, MessageBoxIcon.Warning);
ConnectionLost = 0;
}
else if (BannedIP >= 10)
{
if (MessageBox.Show(Messages.IPBanned.Replace(@"\n", Environment.NewLine).Replace("@NUM@", BannedIP.ToString()), Messages.MessageBoxTitle, MessageBoxButtons.RetryCancel, MessageBoxIcon.Question) == DialogResult.Cancel)
{
this.exitRequest = true;
}
BannedIP = 0;
}
}
RegistryManager.WriteValue(Helper.GetShortDateTimeString(m.AddDate),
Messages.RootKey, Messages.SubKeyLastToArchiveDateTime);
}
else
{
break;
}
InvokeHandle();
}
while (prgUpdate.Value < prgUpdate.Maximum)
{
InvokeHandle();
}
DelegateName dlReset = new DelegateName(GetCurrentName);
BeginInvoke(dlReset, "");
isRunning = false;
this.exitRequest = false;
iMovieBase.log.GenerateSilent("Total movies processed: " + totals.ToString() + Environment.NewLine +
"Movies updated: " + updated.ToString() + Environment.NewLine +
"Movies failed to update: " + updateError.ToString());
MessageBox.Show(Messages.UpdateComplete + Environment.NewLine + Messages.LogCreated + Environment.NewLine + logName, Messages.MessageBoxTitle, MessageBoxButtons.OK, MessageBoxIcon.Information);
return;
}
catch (Exception ex)
{
isRunning = false;
exitRequest = false;
DelegateName dlResetName = new DelegateName(GetCurrentName);
BeginInvoke(dlResetName, "");
DelegateGeneral dlReset = new DelegateGeneral(ResetProgress);
BeginInvoke(dlReset);
iMovieBase.log.GenerateSilent("Total movies processed: " + totals.ToString() + Environment.NewLine +
"Movies updated: " + updated.ToString() + Environment.NewLine +
"Movies failed to update: " + updateError.ToString());
MessageBox.Show(Messages.UpdateError + Environment.NewLine + Messages.LogCreated + Environment.NewLine + ex.Message, Messages.MessageBoxTitle, MessageBoxButtons.OK, MessageBoxIcon.Error);
}
}));
SecondThread.Start();
}
else
{
MessageBox.Show(Messages.SelectValues, Messages.MessageBoxTitle, MessageBoxButtons.OK, MessageBoxIcon.Warning);
}
}
else
{
MessageBox.Show(Messages.NotConnected, Messages.MessageBoxTitle, MessageBoxButtons.OK, MessageBoxIcon.Warning);
}
}
else
{
MessageBox.Show(Messages.WaitForUpdate, Messages.MessageBoxTitle, MessageBoxButtons.OK, MessageBoxIcon.Warning);
}
}
catch (Exception ex)
{
prgUpdate.Value = 0;
MessageBox.Show(ex.Message, Messages.MessageBoxTitle, MessageBoxButtons.OK, MessageBoxIcon.Error);
}
}
