// 添加图例
public static void MakeLegend(AxPageLayoutControl pageLayoutControl, IEnvelope envelope)
{
IActiveView pActiveView = pageLayoutControl.ActiveView;
UID pUID = new UID()
{
Value = "esriCarto.Legend"
};
IGraphicsContainer pGraphicsContainer = pageLayoutControl.PageLayout as IGraphicsContainer;
IMapFrame pMapFrame = pGraphicsContainer.FindFrame(pActiveView.FocusMap) as IMapFrame;
// 根据唯一标识符，创建与之对应的MapSurroundFrame
IMapSurroundFrame pMapSurroundFrame = pMapFrame.CreateSurroundFrame(pUID, null);
// 获取PageLayout中的图例元素
IElement pDeleteElement = pageLayoutControl.FindElementByName("Legend");
if (pDeleteElement != null)
{
pGraphicsContainer.DeleteElement(pDeleteElement); // 如果已存在图例，删除已经存在的图例
}
// 设置MapSurroundFrame背景
ISymbolBackground pSymbolBackground = new SymbolBackgroundClass()
{
FillSymbol = new SimpleFillSymbolClass()
{
Color = AeUtilsSymbology.GetRgbColor(240, 240, 240),
Outline = new SimpleLineSymbolClass()
{
Color = AeUtilsSymbology.GetRgbColor(0, 0, 0)
}
}
};
pMapSurroundFrame.Background = pSymbolBackground;
// 添加图例
IElement pElement = pMapSurroundFrame as IElement;
pElement.Geometry = envelope as IGeometry;
IMapSurround pMapSurround = pMapSurroundFrame.MapSurround;
ILegend pLegend = pMapSurround as ILegend;
pLegend.ClearItems();
pLegend.Title = "图例";
for (int i = 0; i < pActiveView.FocusMap.LayerCount; i++)
{
ILegendItem pLegendItem = new HorizontalLegendItemClass()
{
Layer = pActiveView.FocusMap.get_Layer(i),
ShowDescriptions = false,
Columns = 1,
ShowHeading = true,
ShowLabels = true
};
pLegend.AddItem(pLegendItem);
}
pGraphicsContainer.AddElement(pElement, 0);
pActiveView.PartialRefresh(esriViewDrawPhase.esriViewGraphics, null, null);
}
// ********************************************************************************************
private void FormMain_Load(object sender, EventArgs e)
{
m_pMapC2 = axMapControl_main.Object as IMapControl2; // 初始化地图接口
m_pMapDoc = new MapDocumentClass(); // 初始化地图文档接口
setMxd();
// 默认选择非绘制状态
cmbx_draw.SelectedIndex = 0;
setTOCControl(new Cmd.ZoomToLayer(),
new Cmd.DeleteLayer());
AeUtilsSymbology.Proportional(m_pMapC2.get_Layer(2) as IFeatureLayer, "COLOR", m_pMapC2, axTOCControl_main);
}
