//红色线
public static void ViewPolylines(IMapControl4 pMapControl, List <CPolyline> cpllt)
{
//设置线段属性
ILineSymbol pSimpleLineSymbol = new SimpleLineSymbolClass();
pSimpleLineSymbol.Width = 1;
pSimpleLineSymbol.Color = CHelpFunc.GenerateIRgbColor(255, 0, 0) as IColor;
//生成线段
IElementCollection pEleCol = new ElementCollectionClass();
for (int i = 0; i < cpllt.Count; i++)
{
ILineElement pLineElement = new LineElementClass();
pLineElement.Symbol = pSimpleLineSymbol;
IElement pElement = pLineElement as IElement;
pElement.Geometry = cpllt[i].pPolyline;
pEleCol.Add(pElement, 0);
}
//显示线段
IGraphicsContainer pGra = pMapControl.Map as IGraphicsContainer;
IActiveView pAv = pGra as IActiveView;
pGra.AddElements(pEleCol, 5);
pAv.PartialRefresh(esriViewDrawPhase.esriViewGraphics, null, null);
}
///<summary>
///添加临时元素到地图窗口上
///</summary>
///<param name="pMapCtrl">地图控件</param>
///<param name="pEle">单个元素</param>
///<param name="pEleColl">元素集合</param>
public void AddTempElement(AxMapControl pMapCtrl, IElement pEle, IElementCollection pEleColl)
{
try
{
IMap pMap = pMapCtrl.Map;
IGraphicsContainer pGCs = pMap as IGraphicsContainer;
if (pEle != null)
{
pGCs.AddElement(pEle, 0);
}
if (pEleColl != null)
{
if (pEleColl.Count > 0)
{
pGCs.AddElements(pEleColl, 0);
}
}
IActiveView pAV = (IActiveView)pMap;
//需要刷新才能即时显示
pAV.PartialRefresh(esriViewDrawPhase.esriViewGraphics, null, pAV.Extent);
}
catch (Exception Err)
{
MessageBox.Show(Err.Message, "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
}
}
public void LabelQueryInfo(string name, string strContent, IPoint pt, IMap pMap, bool isRemoveLast)
{
//获取并激活Graphic标注图层
if (pt == null)
{
return;
}
IActiveView pActiveView = pMap as IActiveView;
ICompositeGraphicsLayer pCompositeGraphicsLayer = pMap.BasicGraphicsLayer as ICompositeGraphicsLayer;
//WeatherLabel标记组，通过ArcMap的Layers Properties的Annotation group可以看到
IGraphicsLayer pGraphicsLayer = pCompositeGraphicsLayer.FindLayer("WeatherLabel");
pMap.ActiveGraphicsLayer = pGraphicsLayer as ILayer;
pGraphicsLayer.Activate(pActiveView.ScreenDisplay);
IGraphicsContainer pGraphicsContainer = pGraphicsLayer as IGraphicsContainer;//转换到图形容器接口
IElementCollection pElementCollection = new ElementCollectionClass();
AddBalloonCalloutLabel(name, strContent, pt, pElementCollection);//我们需要一个新的私有函数来实现设置标签元素背景，BalloonCallout对象
//添加标注
if (isRemoveLast == true)
{
pGraphicsContainer.DeleteAllElements();
}
pGraphicsContainer.AddElements(pElementCollection, 1000);
pActiveView.PartialRefresh(esriViewDrawPhase.esriViewGraphics, null, pActiveView.ScreenDisplay.DisplayTransformation.VisibleBounds);
}