C#

assiduous wrote:

no mail is sent and an error message is received.

<br />
using System.Drawing<br />
<br />
ListBox.BackColor=Color.FromArgb(178, 169, 162);<br />

public abstract class ModelBase
{
  public ModelBase() 
  {
    Title = string.Empty;
    FileLocation = string.Empty;
  }

  public string Title{ get ; set; }
  public string FileLocation { get ; set; }
  public abstract void FileSave();
}

public class MyDocument : ModelBase
{
  public MyDocument() : base() {}
  public override void FileSave() 
  { // Do something
  }
  // There'll be some events in here for model based operations.
}

public abstract class ViewBase<T> where T : ModelBase, new()
{
  public ViewBase(T model)
  {
    Model = model;
  }
  protected T Model { get ; set ; }
  public abstract void Refresh() {}
}

public class MyView : ViewBase<MyDocument>
{
  public MyView (MyDocument doc) : base (doc) 
  {
    // The view will be hooked up to some of the model events...
  }

  // Based on an event (such as a new item being added) the view will update
  public override void Refresh()
  {
    // Do something to refresh the view...
  }
}

public class ControllerBase<T, U>
  where T : ModelBase
  where U : ViewBase
{
  private T _model;
  private List<U> _views = new List&lt;U&gt;();
  public ControllerBase(T model)
  {
    _model = model;
  }
  public void AttachView(U view)
  {
    _views.Add(view);
  }

  // The event handlers will react to the model updating to trigger the refreshes here.
  public void RefreshAll()
  {
    foreach (ViewBase view in _views)
    {
      view.Refresh();
    }
  }
}

KienNT78 wrote:

VisualStyleElement but I don't know how to used it

try
{
   try
   {
      Monitor.Lock(s_Lock);
      ...
    }
    finally
    {
      Monitor.Unlock(s_Lock);
    }
}
finally
{
   if (fs != null)
      fs.Close();
}

// Do some stuff that CANNOT be done after acquiring the lock
lock(s_Lock)
{
   using(FileStream fs = new FileStream(...)
   {
      fs.Read(...);
   }
}