AE+C# 向axPageLayoutControl1添加图例

//Get the GraphicsContainer
IGraphicsContainer graphicsContainer = axPageLayoutControl1.GraphicsContainer;//Get the MapFrame
IMapFrame mapFrame = (IMapFrame)graphicsContainer.FindFrame(axPageLayoutControl1.ActiveView.FocusMap);
if (mapFrame == null) return;//Create a legend
UID uID = new UIDClass();
uID.Value = "esriCarto.Legend";//Create a MapSurroundFrame from the MapFrame
IMapSurroundFrame mapSurroundFrame = mapFrame.CreateSurroundFrame(uID, null);
if (mapSurroundFrame == null) return;
if (mapSurroundFrame.MapSurround == null) return;
//Set the name
mapSurroundFrame.MapSurround.Name = "Legend";//Envelope for the legend
IEnvelope envelope = new EnvelopeClass();
envelope.PutCoords(, , 3.4, 2.4);//Set the geometry of the MapSurroundFrame
IElement element = (IElement)mapSurroundFrame;
element.Geometry = envelope;//Add the legend to the PageLayout
axPageLayoutControl1.AddElement(element, Type.Missing, Type.Missing, "Legend", );//Refresh the PageLayoutControl
axPageLayoutControl1.ActiveView.PartialRefresh(esriViewDrawPhase.esriViewGraphics, null, null);