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);
}
private void _UpdateButtons()
{
if (cbxFromLayer.SelectedValue is IFeatureLayer &&
cbxToLayer.SelectedValue is IFeatureLayer &&
cbxFromField.SelectedValue is string &&
cbxToField.SelectedValue is string)
{
btnAdd.Enabled = true;
}
else
{
btnAdd.Enabled = false;
}
bool enableRemove = false;
IFeatureLayer fromLayer = cbxFromLayer.SelectedValue as IFeatureLayer;
if (fromLayer != null)
{
ICompositeGraphicsLayer basicGraphicsLayer = (ICompositeGraphicsLayer)_document.FocusMap.BasicGraphicsLayer;
string graphicsLayerName = _GetGraphicsLayerName(fromLayer.FeatureClass);
ICompositeLayer compositeLayer = (ICompositeLayer)basicGraphicsLayer;
for (int i = 0; i < compositeLayer.Count; i++)
{
if (compositeLayer.get_Layer(i).Name == graphicsLayerName)
{
enableRemove = true;
break;
}
}
}
btnRemove.Enabled = enableRemove;
}
void revLabels_RemoveLabelsEvent()
{
IMap pMap = axMapControl1.Map;
IActiveView pActiveView = pMap as IActiveView;
ICompositeGraphicsLayer pCompositeGraphicsLayer = pMap.BasicGraphicsLayer as ICompositeGraphicsLayer;
IGraphicsLayer pGraphicsLayer = pCompositeGraphicsLayer.FindLayer("WeatherLabel");
IGraphicsContainer pGraphicsContainer = pGraphicsLayer as IGraphicsContainer;
pGraphicsContainer.DeleteAllElements();
pActiveView.PartialRefresh(esriViewDrawPhase.esriViewAll, null, pActiveView.ScreenDisplay.DisplayTransformation.VisibleBounds);
}
private void _RemoveZingers(IFeatureLayer fromLayer)
{
ICompositeGraphicsLayer basicGraphicsLayer = (ICompositeGraphicsLayer)_document.FocusMap.BasicGraphicsLayer;
string graphicsLayerName = _GetGraphicsLayerName(fromLayer.FeatureClass);
ICompositeLayer compositeLayer = (ICompositeLayer)basicGraphicsLayer;
for (int i = 0; i < compositeLayer.Count; i++)
{
if (compositeLayer.get_Layer(i).Name == graphicsLayerName)
{
basicGraphicsLayer.DeleteLayer(graphicsLayerName);
}
}
}
/// <summary>
/// 获取地图中指定名称的存储元素的Graphics图层，找不到则返回Null
/// （通过graphicslayer as IGraphicsContainer来增删改查元素，参考：https://www.cnblogs.com/bobird/articles/3169592.html）
/// </summary>
/// <param name="map">地图</param>
/// <param name="layerName">图层名</param>
/// <returns></returns>
public static IGraphicsLayer GetGraphicsLayer(this IMap map, string layerName)
{
ICompositeGraphicsLayer compositeGrapLayer = map.BasicGraphicsLayer as ICompositeGraphicsLayer;
ICompositeLayer compositeLayer = compositeGrapLayer as ICompositeLayer;
for (int i = 0; i < compositeLayer.Count; i++)
{
if (compositeLayer.get_Layer(i).Name.Equals(layerName))
{
return(compositeLayer.get_Layer(i) as IGraphicsLayer);
}
}
return(null);
}
public IGraphicsLayer FindGraphicsLayer(IBasicMap pBasicMap, string sLayerName)
{
try
{
if (pBasicMap == null)
{
return(null);
}
if (pBasicMap.LayerCount <= 0)
{
return(null);
}
if (string.IsNullOrEmpty(sLayerName))
{
return(null);
}
ICompositeGraphicsLayer basicGraphicsLayer = null;
basicGraphicsLayer = pBasicMap.BasicGraphicsLayer as ICompositeGraphicsLayer;
IGraphicsLayer layer2 = null;
try
{
layer2 = basicGraphicsLayer.FindLayer(sLayerName);
}
catch (Exception)
{
return(pBasicMap.BasicGraphicsLayer);
}
if (layer2 == null)
{
return(null);
}
return(layer2);
}
catch (Exception exception)
{
this.mErrOpt.ErrorOperate(this.mSubSysName, "FunFactory.LayerFun", "FindGraphicsLayer", exception.GetHashCode().ToString(), exception.Source, exception.Message, "", "", "");
return(null);
}
}
private IGraphicsLayer FindOrCreateGraphicsSubLayer(string SubLayerName)
{
IMap Map1 = axMapControl.Map;
IGraphicsLayer gl = Map1.BasicGraphicsLayer;
ICompositeGraphicsLayer cgl = gl as ICompositeGraphicsLayer;
IGraphicsLayer sublayer;
try
{
sublayer = cgl.FindLayer(SubLayerName);
if (sublayer == null)
{
sublayer = cgl.AddLayer(SubLayerName, null);
}
}
catch (Exception ex)
{
sublayer = cgl.AddLayer(SubLayerName, null);
}
return(sublayer);
}
private void _AddZingers(IFeatureLayer fromLayer, string fromFieldName, IFeatureLayer toLayer, string toFieldName)
{
ICompositeGraphicsLayer basicGraphicsLayer = (ICompositeGraphicsLayer)_document.FocusMap.BasicGraphicsLayer;
string graphicsLayerName = _GetGraphicsLayerName(fromLayer.FeatureClass);
// Create lookup for "to" points
Type toValueType;
Dictionary <object, List <IPoint> > toPoints = _GetToPointLookup(toLayer, toFieldName, out toValueType);
// Add zingers
if (toPoints.Count > 0)
{
IGraphicsContainer graphics = (IGraphicsContainer)basicGraphicsLayer.AddLayer(graphicsLayerName, fromLayer);
IFeatureCursor cursor = null;
try
{
int fromField = fromLayer.FeatureClass.FindField(fromFieldName);
cursor = fromLayer.FeatureClass.Search(null, false);
IFeature fromFeature = cursor.NextFeature();
while (fromFeature != null)
{
try
{
IPoint fromPoint = _GetFeaturePoint(fromFeature);
if (fromPoint != null)
{
object fromValue = fromFeature.get_Value(fromField);
if (fromValue != DBNull.Value)
{
try
{
fromValue = Convert.ChangeType(fromValue, toValueType);
}
catch (Exception ex)
{
throw new Exception("Could not convert values in \"from\" field to type of value in \"to\" field.", ex);
}
if (toPoints.ContainsKey(fromValue))
{
foreach (IPoint toPoint in toPoints[fromValue])
{
IPolyline line = new PolylineClass();
line.FromPoint = fromPoint;
line.ToPoint = toPoint;
IElement element = new LineElementClass();
element.Geometry = line;
((ILineElement)element).Symbol = _GetZingerSymbol();
graphics.AddElement(element, 0);
}
}
}
}
}
finally
{
// UrbanDelineationExtension.ReleaseComObject(fromFeature);
}
fromFeature = cursor.NextFeature();
}
}
finally
{
// UrbanDelineationExtension.ReleaseComObject(cursor);
}
}
}
public void Do()
{
IFeatureCursorBuffer2 buffer = new FeatureCursorBufferClass
{
BufferSpatialReference = this.m_pFocusMap.SpatialReference,
DataFrameSpatialReference = this.m_pFocusMap.SpatialReference,
SourceSpatialReference = this.m_pFocusMap.SpatialReference,
TargetSpatialReference = this.m_pFocusMap.SpatialReference
};
if (this.m_SourceType == 0)
{
int num;
bool flag;
buffer.GraphicsLayer2(this.m_pFocusMap.ActiveGraphicsLayer as IGraphicsLayer, this.bUseSelect, out num,
out flag);
}
else
{
IFeatureCursor cursor = null;
if (this.bUseSelect)
{
if ((this.m_pFeatureLayer as IFeatureSelection).SelectionSet.Count == 0)
{
cursor = this.m_pFeatureLayer.Search(null, false);
}
else
{
ICursor cursor2;
(this.m_pFeatureLayer as IFeatureSelection).SelectionSet.Search(null, false, out cursor2);
cursor = cursor2 as IFeatureCursor;
}
}
else
{
cursor = this.m_pFeatureLayer.Search(null, false);
}
buffer.FeatureCursor = cursor;
}
buffer.set_Units(this.m_pFocusMap.MapUnits, this.m_Units);
if (this.m_BufferType == 0)
{
buffer.ValueDistance = this.m_dblRadius;
}
else if (this.m_BufferType == 1)
{
buffer.FieldDistance = this.m_FieldName;
}
else
{
buffer.set_RingDistance(this.m_Count, this.m_dblStep);
}
if (this.m_PolygonType == 0)
{
buffer.PolygonBufferType = esriBufferType.esriBufferAll;
}
else if (this.m_PolygonType == 1)
{
buffer.PolygonBufferType = esriBufferType.esriBufferOutside;
}
else if (this.m_PolygonType == 2)
{
buffer.PolygonBufferType = esriBufferType.esriBufferInside;
}
else
{
buffer.PolygonBufferType = esriBufferType.esriBufferOutsideIncludeInside;
}
buffer.Dissolve = this.bDissolve;
try
{
if (this.m_OutputType == 0)
{
(buffer as IBufferProcessingParameter).SaveAsGraphics = true;
ICompositeGraphicsLayer basicGraphicsLayer =
this.m_pFocusMap.BasicGraphicsLayer as ICompositeGraphicsLayer;
buffer.BufferToGraphics(basicGraphicsLayer);
}
else if (this.m_OutputType == 1)
{
(buffer as IBufferProcessingParameter).InputHasPolygons = false;
(buffer as IBufferProcessingParameter).SimplifyShapes = true;
buffer.Buffer((this.m_pOutFC as IDataset).FullName as IFeatureClassName);
}
else
{
IObjectClassDescription description = new FeatureClassDescriptionClass();
IFields requiredFields = description.RequiredFields;
int index = requiredFields.FindField((description as IFeatureClassDescription).ShapeFieldName);
IFieldEdit edit = requiredFields.get_Field(index) as IFieldEdit;
IGeometryDefEdit geometryDef = edit.GeometryDef as IGeometryDefEdit;
geometryDef.SpatialReference_2 = this.m_pFocusMap.SpatialReference;
geometryDef.GeometryType_2 = esriGeometryType.esriGeometryPolygon;
IFeatureClass o = this.m_pOutFeatureWorksapce.CreateFeatureClass(this.m_FeatClassName,
requiredFields, null, null, esriFeatureType.esriFTSimple, "Shape", "");
IFeatureClassName fullName = (o as IDataset).FullName as IFeatureClassName;
Marshal.ReleaseComObject(o);
o = null;
GC.Collect();
buffer.Buffer(fullName);
}
}
catch (Exception exception)
{
MessageBox.Show(exception.Message);
}
}