AE开发_05_数据操作讲述.pptxVIP

AE开发;;;打开一个现有的 Workspace;访问 FeatureDataset;访问 FeatureClasses;如何创建feature dataset;如何创建feature dataset;使用名称对象（Name objects）;创建一个新的 Workspace ;例子：创建一个新的 Workspace;例子：使用IName接口打开Shapefiles文件的 FeatureClass;创建一个新的 Table 或 FeatureClass ;Field类 和 Fields 类;如何创建fields;public IFields CreateFieldsCollectionForTable() { // Create a new fields collection. IFields fields = new FieldsClass(); // Cast to IFieldsEdit to modify the properties of the fields collection. IFieldsEdit fieldsEdit = (IFieldsEdit)fields; // Set the number of fields the collection will contain. fieldsEdit.FieldCount_2 = 2; // Create the ObjectID field. IField oidField = new FieldClass(); // Cast to IFieldEdit to modify the properties of the new field. IFieldEdit oidFieldEdit = (IFieldEdit)oidField; oidFieldEdit.Name_2 = ObjectID; oidFieldEdit.AliasName_2 = FID; oidFieldEdit.Type_2 = esriFieldType.esriFieldTypeOID;; // Add the new field to the fields collection. fieldsEdit.set_Field(0, oidField); // Create the text field. IField textField = new FieldClass(); IFieldEdit textFieldEdit = (IFieldEdit)textField; textFieldEdit.Length_2 = 30; // Only string fields require that you set the length. textFieldEdit.Name_2 = Owner; textFieldEdit.Type_2 = esriFieldType.esriFieldTypeString; // Add the new field to the fields collection. fieldsEdit.set_Field(1, textField); return fields; };public void AddFieldToFeatureClass(IFeatureClass featureClass, IField field) { ISchemaLock schemaLock = (ISchemaLock)featureClass; try { schemaLock.ChangeSchemaLock(esriSchemaLock.esriExclusiveSchemaLock); featureClass.AddField(field); } catch (Exception exc) { Console.WriteLine(exc.Message); } finally { schemaLock.ChangeSchemaLock(esriSchemaLock.esriSharedSchemaLock); } };获取feature class的GeometryDef对象;如何创建fields;public IFields CreateFieldsCollectionForFeatureClass(ISpatialRefere