Dynamic Event Subscription using C# or VB.NET

The following snippet let you dynamically subscribe to events using C# or VB.NET.

Sample C#

//usage DynamicEventSubscription("button1", "Click", "button1_Click");
public void DynamicEventSubscription(string controlName,string eventName, string targetName, bool recursiveSearch=false)
{
	if (controlName == String.Empty) { throw new ArgumentNullException("controlName"); }
	if (eventName == String.Empty) { throw new ArgumentNullException("eventName"); }
	if (targetName == String.Empty) { throw new ArgumentNullException("targetName"); }

	try
	{
		var eventMethod = GetType().GetMethod(targetName);
		var control = Controls.Find(controlName, false).FirstOrDefault();
		if (control != null)
		{
			var eventToSubscribe = control.GetType().GetEvent(eventName);
			var handler = Delegate.CreateDelegate(eventToSubscribe.EventHandlerType, this, eventMethod);
			var button = Controls.Find(controlName, recursiveSearch).FirstOrDefault();
			eventToSubscribe.AddEventHandler(button, handler);
		}
	}
	catch (Exception ex)
	{
		//handle the exception your way
	}
}

Sample VB.NET

'usage DynamicEventSubscription("button1", "Click", "button1_Click")
Public Sub DynamicEventSubscription(controlName As String, eventName As String, targetName As String, Optional recursiveSearch As Boolean = False)
	If controlName = [String].Empty Then
		Throw New ArgumentNullException("controlName")
	End If
	If eventName = [String].Empty Then
		Throw New ArgumentNullException("eventName")
	End If
	If targetName = [String].Empty Then
		Throw New ArgumentNullException("targetName")
	End If

	Try
		Dim eventMethod = [GetType]().GetMethod(targetName)
		Dim control = Controls.Find(controlName, False).FirstOrDefault()
		If control IsNot Nothing Then
			Dim eventToSubscribe = control.[GetType]().GetEvent(eventName)
			Dim handler = [Delegate].CreateDelegate(eventToSubscribe.EventHandlerType, Me, eventMethod)
			Dim button = Controls.Find(controlName, recursiveSearch).FirstOrDefault()
			eventToSubscribe.AddEventHandler(button, handler)
		End If
			'handle the exception your way
	Catch ex As Exception
	End Try
End Sub

In order to make this snippet work, you need to ensure that the target method is accessible via reflection. If you use .net 3.5 or lower, remove the optional parameter from the method signature.

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How to use Doubleclick in Devexpress Gridview in C# and VB.NET

Using doubleclick events in the Devexpress Gridview Control is a simple task.
There are 2 different ways of doing this. The variant you choose, depends on the Gridview’s gridView.OptionsBehavior.Editable property. If this property is set to false you have to use the DoubleClick event. If this property is set to true you have to use the ShownEditor and HiddenEditor event. I will also give an example on how to combine both methods, if you are using both (true and false) on the gridView.OptionsBehavior.Editable.

Samples

OptionsBehavior.Editable set to False

C# Sample

VB.NET Sample

OptionsBehavior.Editable set to True

When inplace editing is enabled, a click on a grid cell activates the inplace editor (rowedit).
All mouse events will be sent to the editor and cannot be handled by the GridView directly. The DoubleClick event handler is no longer being executed.

C# Sample

VB.NET Sample

OptionsBehavior.Editable set to True or False at Runtime

C# Sample

VB.NET Sample

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