Simple helper to create a featureclass in a geodatabase.
[C#]
///<summary>Simple helper to create a featureclass in a geodatabase.</summary> /// ///<param name="workspace">An IWorkspace2 interface</param> ///<param name="featureDataset">An IFeatureDataset interface or Nothing</param> ///<param name="featureClassName">A System.String that contains the name of the feature class to open or create. Example: "states"</param> ///<param name="fields">An IFields interface</param> ///<param name="CLSID">A UID value or Nothing. Example "esriGeoDatabase.Feature" or Nothing</param> ///<param name="CLSEXT">A UID value or Nothing (this is the class extension if you want to reference a class extension when creating the feature class).</param> ///<param name="strConfigKeyword">An empty System.String or RDBMS table string for ArcSDE. Example: "myTable" or ""</param> /// ///<returns>An IFeatureClass interface or a Nothing</returns> /// ///<remarks> /// (1) If a 'featureClassName' already exists in the workspace a reference to that feature class /// object will be returned. /// (2) If an IFeatureDataset is passed in for the 'featureDataset' argument the feature class /// will be created in the dataset. If a Nothing is passed in for the 'featureDataset' /// argument the feature class will be created in the workspace. /// (3) When creating a feature class in a dataset the spatial reference is inherited /// from the dataset object. /// (4) If an IFields interface is supplied for the 'fields' collection it will be used to create the /// table. If a Nothing value is supplied for the 'fields' collection, a table will be created using /// default values in the method. /// (5) The 'strConfigurationKeyword' parameter allows the application to control the physical layout /// for this table in the underlying RDBMSfor example, in the case of an Oracle database, the /// configuration keyword controls the tablespace in which the table is created, the initial and /// next extents, and other properties. The 'strConfigurationKeywords' for an ArcSDE instance are /// set up by the ArcSDE data administrator, the list of available keywords supported by a workspace /// may be obtained using the IWorkspaceConfiguration interface. For more information on configuration /// keywords, refer to the ArcSDE documentation. When not using an ArcSDE table use an empty /// string (ex: ""). ///</remarks> public ESRI.ArcGIS.Geodatabase.IFeatureClass CreateFeatureClass(ESRI.ArcGIS.Geodatabase.IWorkspace2 workspace, ESRI.ArcGIS.Geodatabase.IFeatureDataset featureDataset, System.String featureClassName, ESRI.ArcGIS.Geodatabase.IFields fields, ESRI.ArcGIS.esriSystem.UID CLSID, ESRI.ArcGIS.esriSystem.UID CLSEXT, System.String strConfigKeyword) { if (featureClassName == "") return null; // name was not passed in ESRI.ArcGIS.Geodatabase.IFeatureClass featureClass; ESRI.ArcGIS.Geodatabase.IFeatureWorkspace featureWorkspace = (ESRI.ArcGIS.Geodatabase.IFeatureWorkspace)workspace; // Explicit Cast if (workspace.get_NameExists(ESRI.ArcGIS.Geodatabase.esriDatasetType.esriDTFeatureClass, featureClassName)) //feature class with that name already exists { featureClass = featureWorkspace.OpenFeatureClass(featureClassName); return featureClass; } // assign the class id value if not assigned if (CLSID == null) { CLSID = new ESRI.ArcGIS.esriSystem.UIDClass(); CLSID.Value = "esriGeoDatabase.Feature"; } ESRI.ArcGIS.Geodatabase.IObjectClassDescription objectClassDescription = new ESRI.ArcGIS.Geodatabase.FeatureClassDescriptionClass(); // if a fields collection is not passed in then supply our own if (fields == null) { // create the fields using the required fields method fields = objectClassDescription.RequiredFields; ESRI.ArcGIS.Geodatabase.IFieldsEdit fieldsEdit = (ESRI.ArcGIS.Geodatabase.IFieldsEdit)fields; // Explicit Cast ESRI.ArcGIS.Geodatabase.IField field = new ESRI.ArcGIS.Geodatabase.FieldClass(); // create a user defined text field ESRI.ArcGIS.Geodatabase.IFieldEdit fieldEdit = (ESRI.ArcGIS.Geodatabase.IFieldEdit)field; // Explicit Cast // setup field properties fieldEdit.Name_2 = "SampleField"; fieldEdit.Type_2 = ESRI.ArcGIS.Geodatabase.esriFieldType.esriFieldTypeString; fieldEdit.IsNullable_2 = true; fieldEdit.AliasName_2 = "Sample Field Column"; fieldEdit.DefaultValue_2 = "test"; fieldEdit.Editable_2 = true; fieldEdit.Length_2 = 100; // add field to field collection fieldsEdit.AddField(field); fields = (ESRI.ArcGIS.Geodatabase.IFields)fieldsEdit; // Explicit Cast } System.String strShapeField = ""; // locate the shape field for (int j = 0; j < fields.FieldCount; j++) { if (fields.get_Field(j).Type == ESRI.ArcGIS.Geodatabase.esriFieldType.esriFieldTypeGeometry) { strShapeField = fields.get_Field(j).Name; } } // Use IFieldChecker to create a validated fields collection. ESRI.ArcGIS.Geodatabase.IFieldChecker fieldChecker = new ESRI.ArcGIS.Geodatabase.FieldCheckerClass(); ESRI.ArcGIS.Geodatabase.IEnumFieldError enumFieldError = null; ESRI.ArcGIS.Geodatabase.IFields validatedFields = null; fieldChecker.ValidateWorkspace = (ESRI.ArcGIS.Geodatabase.IWorkspace)workspace; fieldChecker.Validate(fields, out enumFieldError, out validatedFields); // The enumFieldError enumerator can be inspected at this point to determine // which fields were modified during validation. // finally create and return the feature class if (featureDataset == null)// if no feature dataset passed in, create at the workspace level { featureClass = featureWorkspace.CreateFeatureClass(featureClassName, validatedFields, CLSID, CLSEXT, ESRI.ArcGIS.Geodatabase.esriFeatureType.esriFTSimple, strShapeField, strConfigKeyword); } else { featureClass = featureDataset.CreateFeatureClass(featureClassName, validatedFields, CLSID, CLSEXT, ESRI.ArcGIS.Geodatabase.esriFeatureType.esriFTSimple, strShapeField, strConfigKeyword); } return featureClass; }
[Visual Basic .NET]
'''<summary>Simple helper to create a featureclass in a geodatabase.</summary> ''' '''<param name="workspace">An IWorkspace2 interface</param> '''<param name="featureDataset">An IFeatureDataset interface or Nothing</param> '''<param name="featureClassName">A System.String that contains the name of the feature class to open or create. Example: "states"</param> '''<param name="fields">An IFields interface</param> '''<param name="CLSID">A UID value or Nothing. Example "esriGeoDatabase.Feature" or Nothing</param> '''<param name="CLSEXT">A UID value or Nothing (this is the class extension if you want to reference a class extension when creating the feature class).</param> '''<param name="strConfigKeyword">An empty System.String or RDBMS table string for ArcSDE. Example: "myTable" or ""</param> ''' '''<returns>An IFeatureClass interface or a Nothing</returns> ''' '''<remarks> ''' (1) If a 'featureClassName' already exists in the workspace a reference to that feature class ''' object will be returned. ''' (2) If an IFeatureDataset is passed in for the 'featureDataset' argument the feature class ''' will be created in the dataset. If a Nothing is passed in for the 'featureDataset' ''' argument the feature class will be created in the workspace. ''' (3) When creating a feature class in a dataset the spatial reference is inherited ''' from the dataset object. ''' (4) If an IFields interface is supplied for the 'fields' collection it will be used to create the ''' table. If a Nothing value is supplied for the 'fields' collection, a table will be created using ''' default values in the method. ''' (5) The 'strConfigurationKeyword' parameter allows the application to control the physical layout ''' for this table in the underlying RDBMSfor example, in the case of an Oracle database, the ''' configuration keyword controls the tablespace in which the table is created, the initial and ''' next extents, and other properties. The 'strConfigurationKeywords' for an ArcSDE instance are ''' set up by the ArcSDE data administrator, the list of available keywords supported by a workspace ''' may be obtained using the IWorkspaceConfiguration interface. For more information on configuration ''' keywords, refer to the ArcSDE documentation. When not using an ArcSDE table use an empty ''' string (ex: ""). '''</remarks> Public Function CreateFeatureClass(ByVal workspace As ESRI.ArcGIS.Geodatabase.IWorkspace2, ByVal featureDataset As ESRI.ArcGIS.Geodatabase.IFeatureDataset, ByVal featureClassName As System.String, ByVal fields As ESRI.ArcGIS.Geodatabase.IFields, ByVal CLSID As ESRI.ArcGIS.esriSystem.UID, ByVal CLSEXT As ESRI.ArcGIS.esriSystem.UID, ByVal strConfigKeyword As System.String) As ESRI.ArcGIS.Geodatabase.IFeatureClass If featureClassName = "" Then Return Nothing ' name was not passed in End If Dim featureClass As ESRI.ArcGIS.Geodatabase.IFeatureClass Dim featureWorkspace As ESRI.ArcGIS.Geodatabase.IFeatureWorkspace = CType(workspace, ESRI.ArcGIS.Geodatabase.IFeatureWorkspace) ' Explicit Cast If workspace.NameExists(ESRI.ArcGIS.Geodatabase.esriDatasetType.esriDTFeatureClass, featureClassName) Then featureClass = featureWorkspace.OpenFeatureClass(featureClassName) ' feature class with that name already exists Return featureClass End If ' assign the class id value if not assigned If CLSID Is Nothing Then CLSID = New ESRI.ArcGIS.esriSystem.UIDClass CLSID.Value = "esriGeoDatabase.Feature" End If Dim objectClassDescription As ESRI.ArcGIS.Geodatabase.IObjectClassDescription = New ESRI.ArcGIS.Geodatabase.FeatureClassDescriptionClass ' if a fields collection is not passed in then supply our own If fields Is Nothing Then ' create the fields using the required fields method fields = objectClassDescription.RequiredFields Dim fieldsEdit As ESRI.ArcGIS.Geodatabase.IFieldsEdit = CType(fields, ESRI.ArcGIS.Geodatabase.IFieldsEdit) ' Explict Cast Dim field As ESRI.ArcGIS.Geodatabase.IField = New ESRI.ArcGIS.Geodatabase.FieldClass ' create a user defined text field Dim fieldEdit As ESRI.ArcGIS.Geodatabase.IFieldEdit = CType(Field, ESRI.ArcGIS.Geodatabase.IFieldEdit) ' Explict Cast ' setup field properties fieldEdit.Name_2 = "SampleField" fieldEdit.Type_2 = ESRI.ArcGIS.Geodatabase.esriFieldType.esriFieldTypeString fieldEdit.IsNullable_2 = True fieldEdit.AliasName_2 = "Sample Field Column" fieldEdit.DefaultValue_2 = "test" fieldEdit.Editable_2 = True fieldEdit.Length_2 = 100 ' add field to field collection fieldsEdit.AddField(Field) fields = CType(fieldsEdit, ESRI.ArcGIS.Geodatabase.IFields) ' Explicit Cast End If Dim strShapeField As System.String = "" ' locate the shape field Dim j As System.Int32 For j = 0 To fields.FieldCount If fields.Field(j).Type = ESRI.ArcGIS.Geodatabase.esriFieldType.esriFieldTypeGeometry Then strShapeField = fields.Field(j).Name End If Next j ' Use IFieldChecker to create a validated fields collection. Dim fieldChecker As ESRI.ArcGIS.Geodatabase.IFieldChecker = New ESRI.ArcGIS.Geodatabase.FieldCheckerClass() Dim enumFieldError As ESRI.ArcGIS.Geodatabase.IEnumFieldError = Nothing Dim validatedFields As ESRI.ArcGIS.Geodatabase.IFields = Nothing fieldChecker.ValidateWorkspace = CType(workspace, ESRI.ArcGIS.Geodatabase.IWorkspace) fieldChecker.Validate(fields, enumFieldError, validatedFields) ' The enumFieldError enumerator can be inspected at this point to determine ' which fields were modified during validation. ' finally create and return the feature class If featureDataset Is Nothing Then ' if no feature dataset passed in, create at the workspace level featureClass = featureWorkspace.CreateFeatureClass(featureClassName, validatedFields, CLSID, CLSEXT, ESRI.ArcGIS.Geodatabase.esriFeatureType.esriFTSimple, strShapeField, strConfigKeyword) Else featureClass = featureDataset.CreateFeatureClass(featureClassName, validatedFields, CLSID, CLSEXT, ESRI.ArcGIS.Geodatabase.esriFeatureType.esriFTSimple, strShapeField, strConfigKeyword) End If Return featureClass End Function