public bool QueryInter(string srcLayerName, string tgtLayerName, IMap iMap, esriSpatialRelationEnum spatialRel)
{
DataOperator dataOperator = new DataOperator(iMap);
IFeatureLayer iSrcLayer = (IFeatureLayer)dataOperator.GetLayerByName(srcLayerName);
IFeatureLayer iTgtLayer = (IFeatureLayer)dataOperator.GetLayerByName(tgtLayerName);
IGeometry geom;
IFeature feature;
IFeatureCursor featureCursor;
IFeatureClass srcFeatClass;
IQueryFilter queryFilter = new QueryFilter();
queryFilter.WhereClause = "CONTINENT='Asia'";
featureCursor = iTgtLayer.FeatureClass.Search(queryFilter, false);
feature = featureCursor.NextFeature();
geom = feature.Shape;
srcFeatClass = iSrcLayer.FeatureClass;
ISpatialFilter spatialFilter = new SpatialFilter();
spatialFilter.Geometry = geom;
spatialFilter.WhereClause = "POPULATION=1060000";
spatialFilter.SpatialRel = (esriSpatialRelEnum)spatialRel;
IFeatureSelection featureSelect = (IFeatureSelection)iSrcLayer;
featureSelect.SelectFeatures(spatialFilter, esriSelectionResultEnum.esriSelectionResultNew, false);
return(true);
}
private void miAccessData_Click(object sender, EventArgs e)
{
DataOperator dataOperator = new DataOperator(axMapControl1.Map);
DataBoard dataBoard = new DataBoard("", dataOperator.GetContinentsNames());
dataBoard.Show();
}
public string Statistic(string layerName, string fieldName, IMap iMap)
{
DataOperator dataOperator = new DataOperator(iMap);
IFeatureLayer featLayer = (IFeatureLayer)dataOperator.GetLayerByName(layerName);
IFeatureClass featClass = featLayer.FeatureClass;
IDataStatistics dataStatistics = new DataStatistics();
IFeatureCursor featCursor;
featCursor = featClass.Search(null, false);
ICursor cursor = (ICursor)featCursor;
dataStatistics.Cursor = cursor;
dataStatistics.Field = fieldName;
IStatisticsResults statResult;
statResult = dataStatistics.Statistics;
// double dMax;
// double dMin;
// double dMean;
string sResult = "最大面积为：" + statResult.Maximum.ToString()
+ "\n最小面积为：" + statResult.Minimum.ToString()
+ "\n平均面积为：" + statResult.Mean.ToString();
return(sResult);
}
public bool Buffer(string layerName, string sWhere, int iSize, IMap iMap)
{
IFeatureClass featClass;
IFeature feature;
IGeometry iGeom;
DataOperator dataOperator = new DataOperator(iMap);
IFeatureLayer featLayer = (IFeatureLayer)dataOperator.GetLayerByName(layerName);
IGraphicsContainer graphicsContainer = (IGraphicsContainer)iMap;
graphicsContainer.DeleteAllElements();
featClass = featLayer.FeatureClass;
IQueryFilter queryFilter = new QueryFilter();
queryFilter.WhereClause = sWhere;
IFeatureCursor featCursor;
featCursor = (IFeatureCursor)featClass.Search(queryFilter, false);
int count = featClass.FeatureCount(queryFilter);
feature = featCursor.NextFeature();
iGeom = feature.Shape;
IElement element = new PolygonElementClass();
ITopologicalOperator ipTO = (ITopologicalOperator)iGeom;
element.Geometry = ipTO.Buffer(iSize);
graphicsContainer.AddElement(element, 0);
return(true);
}
private void miGetRenderInfo_Click(object sender, EventArgs e)
{
miRenderSimply.Enabled = true;
DataOperator dataOperator = new DataOperator(axMapControl1.Map);
ILayer layer = dataOperator.GetLayerByName("cities");
MessageBox.Show(MapComposer.GetRendererTypeByLayer(layer));
}
private void axMapControl1_OnMouseDown(object sender, IMapControlEvents2_OnMouseDownEvent e)
{
if (miAddFeature.Checked == true)
{
IPoint point = new PointClass();
point.PutCoords(e.mapX, e.mapY);
DataOperator dataOperator = new DataOperator(axMapControl1.Map);
dataOperator.AddFeatureToLayer("Observation Stations", "观测站", point);
}
return;
}
private void miCreatShapefile_Click(object sender, EventArgs e)
{
DataOperator dataOperator = new DataOperator(axMapControl1.Map);
IFeatureClass featureClass = dataOperator.CreateShapefile("F:\\ProjectFiles\\GIS\\MapControlApplication111", "ShapefileWorkSpace", "ShapefileSample");
if (featureClass == null)
{
MessageBox.Show("创建Shape文件失败");
return;
}
bool bRes = dataOperator.AddFeatureClassToMap(featureClass, "Observation Stations");
if (bRes)
{
miCreateShapefile.Enabled = false;
miAddFeature.Enabled = true;
return;
}
else
{
MessageBox.Show("将新建的Shape文件加入地图失败");
}
}
private void miRenderSimply_Click(object sender, EventArgs e)
{
DataOperator dataOperator = new DataOperator(axMapControl1.Map);
ILayer layer = dataOperator.GetLayerByName("cities");
IRgbColor rgbColor = new RgbColorClass();
rgbColor.Red = 240;
rgbColor.Green = 0;
rgbColor.Blue = 86;
IColor color = rgbColor as IColor;
bool bRes = MapComposer.RenderSimply(layer, color);
if (bRes)
{
axTOCControl1.ActiveView.ContentsChanged();
axMapControl1.ActiveView.Refresh();
miRenderSimply.Enabled = false;
}
else
{
MessageBox.Show("简单图层渲染");
}
}
