public void WriteKmlPiont()

      {

          string driverName = "KML"; //MapInfo File

          OSGeo.GDAL.Gdal.SetConfigOption("GDAL_FILENAME_IS_UTF8", "NO");

          // 为了使属性表字段支持中文，请添加下面这句SHAPE_ENCODING

          //UTF-8 to ISO-8859-1.

          OSGeo.GDAL.Gdal.SetConfigOption("SHAPE_ENCODING", "");

          //注册

          Ogr.RegisterAll();

          OSGeo.OGR.Driver ogrDriver = Ogr.GetDriverByName(driverName);

          DataSource ogrDS = ogrDriver.CreateDataSource("C:\\test.kml", null);

         // string fileName = DateTime.Now.ToString("yyyyMMddHHmmss");

          Layer ogrlayer = ogrDS.CreateLayer("kml", null, wkbGeometryType.wkbPoint, null);

          FieldDefn fdefn = new FieldDefn("Name", FieldType.OFTString);

          fdefn.SetWidth();

          ogrlayer.CreateField(fdefn,);

          fdefn = new FieldDefn("IntField", FieldType.OFTInteger);

          ogrlayer.CreateField(fdefn, );

          fdefn = new FieldDefn("DbleField", FieldType.OFTReal);

          ogrlayer.CreateField(fdefn, );

          fdefn = new FieldDefn("DateField", FieldType.OFTDate);

          ogrlayer.CreateField(fdefn, );

          Feature feature = new Feature(ogrlayer.GetLayerDefn());

          feature.SetField("Name", "新增kml");

          feature.SetField("IntField", (int));

          feature.SetField("DbleField", (double)12.345);

          feature.SetField("DateField", , , , , , , );

          Geometry geom = Geometry.CreateFromWkt("POINT(115.91466833333 28.668223333)");

          feature.SetGeometry(geom);

          ogrlayer.CreateFeature(feature);

          ogrlayer.Dispose();

          ogrDS.Dispose();

      }

   public void WriteKmlLine()

      {

          string driverName = "KML"; //MapInfo File

          OSGeo.GDAL.Gdal.SetConfigOption("GDAL_FILENAME_IS_UTF8", "NO");

          // 为了使属性表字段支持中文，请添加下面这句SHAPE_ENCODING

          //UTF-8 to ISO-8859-1.

          OSGeo.GDAL.Gdal.SetConfigOption("SHAPE_ENCODING", "");

          //注册

          Ogr.RegisterAll();

          OSGeo.OGR.Driver ogrDriver = Ogr.GetDriverByName(driverName);

          DataSource ogrDS = ogrDriver.CreateDataSource("C:\\wkbLineString.kml", null);

          // string fileName = DateTime.Now.ToString("yyyyMMddHHmmss");

          Layer ogrlayer = ogrDS.CreateLayer("kml", null, wkbGeometryType.wkbLineString, null);

          FieldDefn fdefn = new FieldDefn("Name", FieldType.OFTString);

          fdefn.SetWidth();

          ogrlayer.CreateField(fdefn, );

          fdefn = new FieldDefn("IntField", FieldType.OFTInteger);

          ogrlayer.CreateField(fdefn, );

          fdefn = new FieldDefn("DbleField", FieldType.OFTReal);

          ogrlayer.CreateField(fdefn, );

          fdefn = new FieldDefn("DateField", FieldType.OFTDate);

          ogrlayer.CreateField(fdefn, );

          Feature feature = new Feature(ogrlayer.GetLayerDefn());

          feature.SetField("Name", "新增kml");

          feature.SetField("IntField", (int));

          feature.SetField("DbleField", (double)12.345);

          feature.SetField("DateField", , , , , , , );

          Geometry geom = new Geometry(wkbGeometryType.wkbLineString); //Geometry.CreateFromWkt("LINESTRING(115.91466833333 28.668223333)");

          //需要增加两个点，两点成一线，开始测试的时候就经常报错。、

          geom.AddPoint_2D(115.91466833333, 28.668223333);

          geom.AddPoint_2D(115.92466833333, 28.668223333);

          feature.SetGeometry(geom);

          ogrlayer.CreateFeature(feature);

          ogrlayer.Dispose();

          ogrDS.Dispose();

      }