//鼠标点击事件
private void axMapControl1_OnMouseDown(object sender, IMapControlEvents2_OnMouseDownEvent e)
{
if (pMouseOperate == "ZoomIn")
{
axMapControl1.Extent = axMapControl1.TrackRectangle();
}
if (pMouseOperate == "ZoomOut")
{
IEnvelope penv = axMapControl1.Extent;
penv.Expand(2, 2, true);
axMapControl1.Extent = penv;
}
if (pMouseOperate == "Pan")
{
axMapControl1.Pan();
}
if (pMouseOperate == "Identify")
{
IPoint point = new ESRI.ArcGIS.Geometry.Point();
point.PutCoords(e.mapX, e.mapY);
IFeatureLayer pFeatureLayer = axMapControl1.get_Layer(0) as IFeatureLayer;
IFeatureClass pFeatureClass = pFeatureLayer.FeatureClass;
string shapefieldname = pFeatureClass.ShapeFieldName;
ESRI.ArcGIS.Geodatabase.ISpatialFilter pSpatialFilter = new ESRI.ArcGIS.Geodatabase.SpatialFilter();
pSpatialFilter.Geometry = point;
pSpatialFilter.SpatialRel = ESRI.ArcGIS.Geodatabase.esriSpatialRelEnum.esriSpatialRelIntersects;
pSpatialFilter.set_OutputSpatialReference(shapefieldname, axMapControl1.SpatialReference);
pSpatialFilter.GeometryField = shapefieldname;
ESRI.ArcGIS.Geodatabase.IFeatureCursor pFeatureCursor = pFeatureClass.Search(pSpatialFilter, false);
ESRI.ArcGIS.Geodatabase.IFeature pFeature = pFeatureCursor.NextFeature();
if (pFeature != null)
{
axMapControl1.FlashShape(pFeature.Shape);
}
IFields pField = pFeature.Fields;
listFields.Items.Clear();
for (int i = 0; i <= pField.FieldCount - 1; i++)
{
listFields.Items.Add(pField.get_Field(i).Name + "=" + pFeature.get_Value(i));
}
}
}
// get features that intersect the buffered mouse click and return them as a list of IFeature
public List <IFeature> checkForIntersectingSegments(IPoint mousePoint, double buffer, IFeatureClass featureClass)
{
var envelope = mousePoint.Envelope;
envelope.Expand(buffer, buffer, false);
var geodataset = (IGeoDataset)featureClass;
string shapeFieldName = featureClass.ShapeFieldName;
ESRI.ArcGIS.Geodatabase.ISpatialFilter spatialFilter = new ESRI.ArcGIS.Geodatabase.SpatialFilter();
spatialFilter.Geometry = envelope;
spatialFilter.SpatialRel = esriSpatialRelEnum.esriSpatialRelCrosses; // website for other options edndoc.esri.com/arcobjects/9.2/ComponentHelp/esrigeodatabase/esrispatialrelenum.htm
spatialFilter.set_OutputSpatialReference(shapeFieldName, geodataset.SpatialReference);
ESRI.ArcGIS.Geodatabase.IFeatureCursor featureCursor = featureClass.Search(spatialFilter, false);
var features = new List <IFeature>();
ESRI.ArcGIS.Geodatabase.IFeature feature;
while ((feature = featureCursor.NextFeature()) != null)
{
features.Add(feature);
}
return(features);
}