/// <summary>
/// Remove all event handlers from a control.
/// </summary>
/// <param name="control">Control to remove event handlers</param>
/// <param name="argumentOnly">True if you want to remove event handlers only from the specified control and remain child contols' events.
/// Otherwise, child controls' event handlers are also removed.</param>
public static void RemoveAllEvents(Control control, bool argumentOnly)
{
List <Control> list = new List <Control>();
list.Add(control);
if (!argumentOnly)
{
list.AddRange(GetAllChildControls(control));
}
// To improve performance, once created EventRelatedFieldInfoContainer instance is stored for reuse.
List <EventRelatedFieldInfoContainer> containerList = new List <EventRelatedFieldInfoContainer>();
foreach (Control c in list)
{
EventRelatedFieldInfoContainer container = containerList.Find(x => x.ControlType.Equals(c.GetType()));
if (container == null)
{
container = new EventRelatedFieldInfoContainer(c.GetType());
containerList.Add(container);
}
foreach (EventRelatedFieldInfo info in container.GetEventRelatedFieldInfos())
{
info.RemoveDelegate(c);
}
}
}
/// <summary>
/// Collect all Windows form control's event information and dump it.
/// </summary>
/// <returns>Iteration of dumped string</returns>
public static IEnumerable <string> DumpControlEvents()
{
foreach (Type controlType in typeof(System.Windows.Forms.Control).Assembly.GetTypes())
{
if (controlType.IsAbstract)
{
continue;
}
if (!controlType.Equals(typeof(System.Windows.Forms.Control)) &&
!controlType.IsSubclassOf(typeof(System.Windows.Forms.Control)))
{
continue;
}
if (controlType.Equals(typeof(System.Windows.Forms.WebBrowser)) &&
System.Threading.Thread.CurrentThread.GetApartmentState() != System.Threading.ApartmentState.STA)
{
continue;
}
ConstructorInfo ci = controlType.GetConstructor(Type.EmptyTypes);
if ((ci == null) ||
(!ci.IsPublic))
{
continue;
}
EventRelatedFieldInfoContainer container = new EventRelatedFieldInfoContainer(controlType);
yield return($"Control Type : {container.ControlType.Name}{Environment.NewLine}");
foreach (EventRelatedFieldInfo info in container.GetEventRelatedFieldInfos())
{
yield return(info.GetInformationString());
}
yield return(Environment.NewLine);
}
}
private static void InitializeControl(Control targetControl, Control originalControl, bool duplicating)
{
#region Handle Control.Controls property.
// List child controls to move or to duplicate.
List <Control> childControlList = new List <Control>();
foreach (Control childControl in originalControl.Controls)
{
childControlList.Add(childControl);
}
foreach (Control childControl in childControlList)
{
if (duplicating)
{
Control duplicatedChildControl = DuplicateControl(childControl);
targetControl.Controls.Add(duplicatedChildControl);
}
else
{
originalControl.Controls.Remove(childControl);
targetControl.Controls.Add(childControl);
}
}
#endregion
#region Handle other properties.
// Iterate public and readable properties from originalControl.
foreach (PropertyInfo originalPi in originalControl.GetType().GetProperties(BindingFlags.Public | BindingFlags.Instance | BindingFlags.GetProperty))
{
if (!originalPi.CanRead)
{
continue;
}
// Controls property is already handled.
if (originalPi.Name == nameof(Control.Controls))
{
continue;
}
// Parent property must not be changed here.
if (originalPi.Name == nameof(Control.Parent))
{
continue;
}
// Except Name property, not browsable properties are ignored.
BrowsableAttribute originalBrowsable = originalPi.GetCustomAttribute <BrowsableAttribute>(true);
if ((originalBrowsable != null) && !originalBrowsable.Browsable)
{
if (originalPi.Name != nameof(Control.Name))
{
continue;
}
}
// Get corresponding public and writable property from targetControl.
// Notice that the type of targetControl may be derived from the type of originalControl.
// This is allowed when calling ReplaceControl method.
PropertyInfo targetPi = GetPublicSetProperty(originalPi.Name, targetControl.GetType());
if ((targetPi == null) || !targetPi.CanWrite || !targetPi.PropertyType.IsAssignableFrom(originalPi.PropertyType))
{
continue;
}
// BrowsableAttribute also may be overwritten.
BrowsableAttribute targetBrowsable = originalPi.GetCustomAttribute <BrowsableAttribute>(true);
if ((targetBrowsable != null) && !targetBrowsable.Browsable)
{
continue;
}
object value = originalPi.GetValue(originalControl, null);
targetPi.SetValue(targetControl, value, null);
}
#endregion
#region Handle events.
EventRelatedFieldInfoContainer infoContainer = new EventRelatedFieldInfoContainer(originalControl.GetType());
foreach (EventRelatedFieldInfo info in infoContainer.GetEventRelatedFieldInfos())
{
if (duplicating)
{
info.CopyDelegate(targetControl, originalControl);
}
else
{
info.MoveDelegate(targetControl, originalControl);
}
}
#endregion
// Duplicated control's Visible property tends to become false. Force to set true by default.
targetControl.Visible = true;
}
