arcengine获取图层要素_arcengine创建要素类、图层的方法

别人写的，感觉不错

///

2        /// 创建要素类

3        ///

4        /// IWorkspace或者IFeatureDataset对象

5        /// 要素类名称

6        /// 空间参考

7        /// 要素类型

8        /// 几何类型

9        /// 字段集

10        /// CLSID值

11        /// EXTCLSID值

12        /// 配置信息关键词

13        /// 返回IFeatureClass

14        public static IFeatureClass CreateFeatureClass(object pObject, string pName, ISpatialReference pSpatialReference, esriFeatureType pFeatureType,

15                                       esriGeometryType pGeometryType, IFields pFields, UID pUidClsId, UID pUidClsExt, string pConfigWord)

16        {

17            错误检测#region 错误检测

18            if (pObject == null)

19            {

20                throw (new Exception("[pObject] 不能为空!"));

21            }

22            if (!((pObject is IFeatureWorkspace) || (pObject is IFeatureDataset)))

23            {

24                throw (new Exception("[pObject] 必须为IFeatureWorkspace 或者 IFeatureDataset"));

25            }

26            if (pName.Length == 0)

27            {

28                throw (new Exception("[pName] 不能为空!"));

29            }

30            if ((pObject is IWorkspace) && (pSpatialReference == null))

31            {

32                throw (new Exception("[pSpatialReference] 不能为空(对于单独的要素类)"));

33            }

34            #endregion

35

36            pUidClsID字段为空时#region pUidClsID字段为空时

37            if (pUidClsId == null)

38            {

39                pUidClsId = new UIDClass();

40                switch (pFeatureType)

41                {

42                    case (esriFeatureType.esriFTSimple):

43                        if (pGeometryType == esriGeometryType.esriGeometryLine)

44                            pGeometryType = esriGeometryType.esriGeometryPolyline;

45                        pUidClsId.Value = "{52353152-891A-11D0-BEC6-00805F7C4268}";

46                        break;

47                    case (esriFeatureType.esriFTSimpleJunction):

48                        pGeometryType = esriGeometryType.esriGeometryPoint;

49                        pUidClsId.Value = "{CEE8D6B8-55FE-11D1-AE55-0000F80372B4}";

50                        break;

51                    case (esriFeatureType.esriFTComplexJunction):

52                        pUidClsId.Value = "{DF9D71F4-DA32-11D1-AEBA-0000F80372B4}";

53                        break;

54                    case (esriFeatureType.esriFTSimpleEdge):

55                        pGeometryType = esriGeometryType.esriGeometryPolyline;

56                        pUidClsId.Value = "{E7031C90-55FE-11D1-AE55-0000F80372B4}";

57                        break;

58                    case (esriFeatureType.esriFTComplexEdge):

59                        pGeometryType = esriGeometryType.esriGeometryPolyline;

60                        pUidClsId.Value = "{A30E8A2A-C50B-11D1-AEA9-0000F80372B4}";

61                        break;

62                    case (esriFeatureType.esriFTAnnotation):

63                        pGeometryType = esriGeometryType.esriGeometryPolygon;

64                        pUidClsId.Value = "{E3676993-C682-11D2-8A2A-006097AFF44E}";

65                        break;

66                    case (esriFeatureType.esriFTDimension):

67                        pGeometryType = esriGeometryType.esriGeometryPolygon;

68                        pUidClsId.Value = "{496764FC-E0C9-11D3-80CE-00C04F601565}";

69                        break;

70                }

71            }

72            #endregion

73

74            pUidClsExt字段为空时#region pUidClsExt字段为空时

75            if (pUidClsExt == null)

76            {

77                switch (pFeatureType)

78                {

79                    case esriFeatureType.esriFTAnnotation:

80                        pUidClsExt = new UIDClass();

81                        pUidClsExt.Value = "{24429589-D711-11D2-9F41-00C04F6BC6A5}";

82                        break;

83                    case esriFeatureType.esriFTDimension:

84                        pUidClsExt = new UIDClass();

85                        pUidClsExt.Value = "{48F935E2-DA66-11D3-80CE-00C04F601565}";

86                        break;

87                }

88            }

89            #endregion

90

91            字段集合为空时#region 字段集合为空时

92            if (pFields == null)

93            {

94                //实倒化字段集合对象

95                pFields = new FieldsClass();

96                IFieldsEdit tFieldsEdit = (IFieldsEdit)pFields;

97

98                //创建几何对象字段定义

99                IGeometryDef tGeometryDef = new GeometryDefClass();

100                IGeometryDefEdit tGeometryDefEdit = tGeometryDef as IGeometryDefEdit;

101

102                //指定几何对象字段属性值

103                tGeometryDefEdit.GeometryType_2 = pGeometryType;

104                tGeometryDefEdit.GridCount_2 = 1;

105                tGeometryDefEdit.set_GridSize(0, 1000);

106                if (pObject is IWorkspace)

107                {

108                    tGeometryDefEdit.SpatialReference_2 = pSpatialReference;

109                }

110

111                //创建OID字段

112                IField fieldOID = new FieldClass();

113                IFieldEdit fieldEditOID = fieldOID as IFieldEdit;

114                fieldEditOID.Name_2 = "OBJECTID";

115                fieldEditOID.AliasName_2 = "OBJECTID";

116                fieldEditOID.Type_2 = esriFieldType.esriFieldTypeOID;

117                tFieldsEdit.AddField(fieldOID);

118

119                //创建几何字段

120                IField fieldShape = new FieldClass();

121                IFieldEdit fieldEditShape = fieldShape as IFieldEdit;

122                fieldEditShape.Name_2 = "SHAPE";

123                fieldEditShape.AliasName_2 = "SHAPE";

124                fieldEditShape.Type_2 = esriFieldType.esriFieldTypeGeometry;

125                fieldEditShape.GeometryDef_2 = tGeometryDef;

126                tFieldsEdit.AddField(fieldShape);

127            }

128            #endregion

129

130            //几何对象字段名称

131            string strShapeFieldName = "";

132            for (int i = 0; i < pFields.FieldCount; i++)

133            {

134                if (pFields.get_Field(i).Type == esriFieldType.esriFieldTypeGeometry)

135                {

136                    strShapeFieldName = pFields.get_Field(i).Name;

137                    break;

138                }

139            }

140

141            if (strShapeFieldName.Length == 0)

142            {

143                throw (new Exception("字段集中找不到几何对象定义"));

144            }

145

146            IFeatureClass tFeatureClass = null;

147            if (pObject is IWorkspace)

148            {

149                //创建独立的FeatureClass

150                IWorkspace tWorkspace = pObject as IWorkspace;

151                IFeatureWorkspace tFeatureWorkspace = tWorkspace as IFeatureWorkspace;

152                tFeatureClass = tFeatureWorkspace.CreateFeatureClass(pName, pFields, pUidClsId, pUidClsExt, pFeatureType, strShapeFieldName, pConfigWord);

153            }

154            else if (pObject is IFeatureDataset)

155            {

156                //在要素集中创建FeatureClass

157                IFeatureDataset tFeatureDataset = (IFeatureDataset)pObject;

158                tFeatureClass = tFeatureDataset.CreateFeatureClass(pName, pFields, pUidClsId, pUidClsExt, pFeatureType, strShapeFieldName, pConfigWord);

159            }

160

161            return tFeatureClass;

162        }