/// <summary>
/// 全选
/// </summary>
public void SelectAll()
{
var allComponents = this.Blocks.Cast <IModelingDesignerComponent>().Union(this.Relations);
var allDesignerControls = allComponents.Select(d => d.EngineControl as IDesignerCanvasItemInternal).ToArray();
_canvas.AddSelection(false, allDesignerControls);
}
