IEnvelope envelope = new EnvelopeClass();

envelope.PutCoords(, , , );

ISpatialFilter spatialFilter = new SpatialFilterClass();

spatialFilter.Geometry = envelope;

String shpFld = featureClass.ShapeFieldName;

spatialFilter.GeometryField = shpFld;

spatialFilter.SpatialRel = esriSpatialRelEnum.esriSpatialRelIntersects;

IQueryFilter queryFilter = new QueryFilterClass();

queryFilter = (IQueryFilter)spatialFilter;

IFeatureCursor searchCursor = featureClass.Search(queryFilter, true);//只查询，true快一些

IFeature feature = searchCursor.NextFeature();

int n = ;

while (feature != null){

    n++;

    feature = baseCursor.NextFeature();

}

IFeatureBuffer featureBuffer = featureClass.CreateFeatureBuffer();

IFeatureCursor featureCursor = featureClass.Insert(true);

object featureOID;

featureBuffer.set_Value(featureBuffer.Fields.FindField("InstBy"), "B Pierce");

for (int ic = ; ic < ; ic++) {

   featureBuffer.Shape = geometry

   featureOID = featureCursor.InsertFeature(featureBuffer);

}

featureBuffer.set_Value(featureBuffer.Fields.FindField("InstBy"), "K Johnston");

for (int ic = ; ic < ; ic++)

{

     featureBuffer.Shape = geometry

     featureOID = featureCursor.InsertFeature(featureBuffer);

}

featureCursor.Flush();

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 = ;

while (feature != null)

{

    m++;

    updateCursor.DeleteFeature(feature);

    feature = updateCursor.NextFeature();

}

//by yl landgis@126.com yanleigis@21cn.com 2008.7.7

IFeatureClass featureClass = featureWorkspace.OpenFeatureClass("Parcels");

// restrict the number of features to be updated.

IQueryFilter queryFilter = new QueryFilterClass();

queryFilter.WhereClause = "ZONING_S = 'U'";

// use IFeatureClass::Update to populate IFeatureCursor

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();

}