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(1, 1, 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", 0);

            //Refresh the PageLayoutControl
            axPageLayoutControl1.ActiveView.PartialRefresh(esriViewDrawPhase.esriViewGraphics, null, null);