arcgis engine 监听element的添加、更新和删除事件（使用IGraphicsContainerEvents）

IGraphicsContainerEvents Interface

如何监听 element事件？

如，当我们在Mapcontrol上添加、删除、更新了一个Element后，如何捕捉到这个事件？

   1，首先定义全局变量： IGraphicsContainerEvents_Event pGraphicsContainerEvent;

   2，在Form1_Load中给该变量赋值： pGraphicsContainerEvent = this.axMapControl1.ActiveView.FocusMap.BasicGraphicsLayer as IGraphicsContainerEvents_Event;

   3，添加事件处理

pGraphicsContainerEvent.ElementAdded += new IGraphicsContainerEvents_ElementAddedEventHandler(ElementAddedMethod);

 

           pGraphicsContainerEvent.ElementDeleted +=new IGraphicsContainerEvents_ElementDeletedEventHandler(ElementDeletedMethod);

 

            pGraphicsContainerEvent.ElementUpdated += new IGraphicsContainerEvents_ElementUpdatedEventHandler( ElementUpdatedMethod);

4，定义事件：

  private void ElementAddedMethod(IElement i)

        {

            System.Windows.Forms.MessageBox.Show("Element Added");

            axMapControl1.ActiveView.PartialRefresh(esriViewDrawPhase.esriViewGeography, null, null);

        }

        private void ElementDeletedMethod(IElement i)

        {

            System.Windows.Forms.MessageBox.Show("Element Deleted");

            axMapControl1.ActiveView.PartialRefresh(esriViewDrawPhase.esriViewGeography, null, null);

        }

        private void ElementUpdatedMethod(IElement i)

        {

            System.Windows.Forms.MessageBox.Show("Element Updated");

            axMapControl1.ActiveView.PartialRefresh(esriViewDrawPhase.esriViewGeography, null, null);

        }

http://blog.sina.com.cn/s/blog_90b91bf10100yks1.html

 

 

 

 

	AllPropertiesMethods	Description
	AllElementsDeleted	Occurs when all the elements are deleted.
	ElementAdded	Occurs when the element is added.
	ElementDeleted	Occurs when the element is deleted.
	ElementsAdded	Occurs when the elements are added.
	ElementUpdated	Occurs when the element is updated.