C#

nt_virus wrote:

Backend will be SQL Server..

if (ProgressUpdate != null)
 ProgressUpdate();

public delegate void SegmentProgressUpdate(object sender, EventArgs e);

<br />
SegmentOne.ProgressUpdate += new Segment.SegmentProgressUpdate(SegmentOne_ProgressUpdate);

<br />
if (ProgressUpdate != null)<br />
{<br />
    ProgressUpdate(this, System.EventArgs.Empty);<br />
}<br />
else<br />
   System.Windows.Forms.MessageBox.Show("error segment.cs:109");

<br />
SegmentOne = new Segment(SegmentOneStart, SegmentOneEnd, this._webRequest);<br />
SegmentOne.ProgressUpdate += new Segment.SegmentProgressUpdate(SegmentOne_ProgressUpdate);

public class TestA
{
    public event EventHandler Property1Changed;
    public event EventHandler<TestEventArgs> Property2Changed;

    public int Property1
    {
        set { OnProperty1Changed(); }
    }
    public int Property2
    {
        set { OnProperty2Changed(value); }
    }
    protected virtual void OnProperty1Changed()
    {
        if(Property1Changed!=null)
            Property1Changed(this, EventArgs.Empty);
    }
    protected virtual void OnProperty2Changed(int value)
    {
        if (Property2Changed != null)
            Property2Changed(this, new TestEventArgs(value));
    }
}
public class TestEventArgs : EventArgs
{
    public TestEventArgs(int value)
    {
        m_Value = value;
    }
    private int m_Value;
    public int Value
    {
        get { return m_Value; }
    }
}

TestA testA = new TestA();
testA.Property1Changed += new EventHandler(testA_Property1Changed);
testA.Property2Changed += new EventHandler<TestEventArgs>(testA_Property2Changed);
testA.Property1 = 1;
testA.Property2 = 2;

void testA_Property2Changed(object sender, TestEventArgs e)
{
    Console.WriteLine("Property 2 Changed to: " + e.Value);
}

void testA_Property1Changed(object sender, EventArgs e)
{
    Console.WriteLine("Property 1 Changed.");
}

//Above my constructor<br />
public event EventHandler TestEvent;<br />
<br />
//within my constructor (in a loop)<br />
if (TestEvent != null)<br />
   TestEvent(this, System.EventArgs.Empty);<br />
else<br />
   System.Windows.Forms.MessageBox.Show("Event returned null");<br />
<br />
<br />
//And in my main app when i use the class:<br />
SegmentOne = new Segment(SegmentOneStart, SegmentOneEnd, this._webRequest);<br />
SegmentOne.TestEvent += new EventHandler(SegmentOne_TestEvent);

Abydosgater wrote:

within my constructor

public class TestA
{
   public static event EventHandler ConstructorCompleted;
   public TestA()
   {
      OnConstructorCompleted(this);
   }
   protected static void OnConstructorCompleted(TestA instance)
   {
      if (ConstructorCompleted != null)
         ConstructorCompleted(instance, EventArgs.Empty);
   }
}

TestA.ConstructorCompleted += new EventHandler(TestA_ConstructorCompleted);
TestA testA = new TestA();

void TestA_ConstructorCompleted(object sender, EventArgs e)
{
   if (sender is TestA)
   {
      Console.WriteLine("OK");
      TestA.ConstructorCompleted -= TestA_ConstructorCompleted;
   }
}

SegmentOne = new Segment(SegmentOneStart, SegmentOneEnd, this._webRequest);<br />
SegmentOne.ProgressUpdate += new Segment.SegmentProgressUpdate(SegmentOne_ProgressUpdate);<br />
SegmentOne.Start();