1、查找数据
1）、利用FeaturCursor进行空间查询
//空间查询
ISpatialFilter spatialFilter = new SpatialFilterClass();
spatialFilter.Geometry = envelope;//指定几何体
String shpFld = featureClass.ShapeFieldName;
spatialFilter.GeometryField = shpFld;
spatialFilter.SpatialRel = esriSpatialRelEnum.esriSpatialRelIntersects;//相交
IQueryFilter queryFilter = new QueryFilterClass();
queryFilter = (IQueryFilter)spatialFilter;
IFeatureCursor searchCursor = featureClass.Search(queryFilter, true);
IFeature feature = searchCursor.NextFeature();
int n = 0;
while (feature != null){
n++;
feature = baseCursor.NextFeature();
}
2）、利用FeatureCursor在选择集中进行查询
IFeatureSelection pFeatureSelectio = pFeatureLayer as IFeatureSelection;
ICursor ppCursor;
pFeatureSelectio.SelectionSet.Search(null, false, out ppCursor);
IFeatureCursor pFeatureCursor = ppCursor as IFeatureCursor;
IFeature pFeature = pFeatureCursor.NextFeature();
3）、利用FeatureCursor进行属性查询
IQueryFilter pQueryFilter = new QueryFilterClass();
pQueryFilter.WhereClause = "PROJECTCODE = ‘" + this.ProjectNumTextBox.Text.Trim() + "‘";
IFeatureCursor pFeatureCursor = LineFeaClass.Search(pQueryFilter, false);
IFeature pFeatureIfExit = pFeatureCursor.NextFeature();
2、
插入数据
1）、利用Insert Cursors和featureBuffer
IFeatureBuffer featureBuffer = featureClass.CreateFeatureBuffer();
IFeatureCursor featureCursor = featureClass.Insert(true);
object featureOID;
featureBuffer.set_Value(featureBuffer.Fields.FindField("InstBy"), "B Pierce");
for (int ic = 0; ic < 99; ic++)
{
featureBuffer.Shape = geometry;
featureOID = featureCursor.InsertFeature(featureBuffer);
}
featureBuffer.set_Value(featureBuffer.Fields.FindField("InstBy"), "K Johnston");
for (int ic = 0; ic < 99; ic++)
{
featureBuffer.Shape = geometry
featureOID = featureCursor.InsertFeature(featureBuffer);
}
featureCursor.Flush();
2）、直接进行数据插入（Feature.Store方法）
IFeature newLineFeature = LineFeaClass.CreateFeature();
newLineFeature.Shape = pFeature.Shape;
int ii = newLineFeature.Fields.FindField(AreaZonalName);
if (ii > 0)
{
newLineFeature.set_Value(ii, this.AnalysAreaComboBox.Text.Trim());
}
newLineFeature.Store();
注：最好将编辑操作对象中，如下：
IDataset dataset = (IDataset)featureClass;
IWorkspace workspace = dataset.Workspace;
// Cast the workspace to the IWorkspaceEdit interface.
IWorkspaceEdit workspaceEdit = (IWorkspaceEdit)workspace;
// Start an edit session and edit operation.
workspaceEdit.StartEditing(true);
workspaceEdit.StartEditOperation();
//在这里编写添加要素的代码。。。。。。。。。。。
// Stop editing.
workspaceEdit.StopEditOperation();
workspaceEdit.StopEditing(true);
3、数据删除 delete
IFeatureClass featureClass = featureWorkspace.OpenFeatureClass("Parcels");
IQueryFilter queryFilter = new QueryFilterClass();
queryFilter.WhereClause = "ZONING_S = ‘R‘";
IFeatureCursor updateCursor = featureClass.Update(queryFilter, false);
IFeature feature = updateCursor.NextFeature();
int m = 0;
while (feature != null)
{
m++;
updateCursor.DeleteFeature(feature);
feature = updateCursor.NextFeature();
}
4、
数据更新 update
IFeatureClass featureClass = featureWorkspace.OpenFeatureClass("Parcels");
// 属性查询
IQueryFilter queryFilter = new QueryFilterClass();
queryFilter.WhereClause = "ZONING_S = ‘U‘";
//利用FeatureCursor进行数据更新
IFeatureCursor updateCursor = featureClass.Update(queryFilter, false);
int fieldindex = featureClass.FindField("ZONING_S");
IFeature feature = updateCursor.NextFeature();
int m = 0;
while (feature != null)
{
m++;
feature.set_Value(fieldindex, "X");
updateCursor.UpdateFeature(feature);
feature = updateCursor.NextFeature();
}
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