Diagram.ExecuteCommand Method

Executes the specified command on this diagram.

Namespace: MindFusion.Diagramming
Assembly: MindFusion.Diagramming

 Syntax

C#

public void ExecuteCommand (
    Command command
)

Visual Basic

Public Sub ExecuteCommand( _
    command As Command _
)

 Parameters

command

The Command to execute.

 Remarks

If undo/redo is enabled, the command is saved in the undo history or added to the active composite command.

AddItemCommand and RemoveItemCommand objects are created automatically by the control when adding or removing items, both programmatically or interactively. Calling this method explicitly could be necessary in order to save item's state for later undo using a ChangeItemCommand, or to run a custom operation represented by a class derived from Command.

 Example

The following example shows the pattern that should be used to save the state of an item for later undo.

C#

var node = diagram.ActiveItem as ShapeNode;
if (node != null)
{
    var change = new ChangeItemCommand(diagram, node);
    node.Text = "new text";
    node.Brush = new SolidColorBrush(Colors.Red);
    diagram.ExecuteCommand(change);
}

Visual Basic

Dim node = TryCast(diagram.ActiveItem, ShapeNode)
If node IsNot Nothing Then
    Dim change = New ChangeItemCommand(diagram, node)
    node.Text = "new text"
    node.Brush = New SolidColorBrush(Colors.Red)
    diagram.ExecuteCommand(change)
End If