IFeatureWorkspace接口是在工作空间中创建对象主要使用的接口。方法：

	AllProperties Methods	Description
	CreateFeatureClass	Creates a new standalone feature class under the workspace.//创建一个FeatureClass
	CreateFeatureDataset	Creates a new feature dataset.//创建一个FeatureDataset
	CreateQueryDef	Create a query definition object.
	CreateRelationshipClass	Creates a new relationship class.
	CreateTable	Creates a new table. //创建表
	OpenFeatureClass	Opens an existing feature class.//从工作空间中打开一个FeatureClass
	OpenFeatureDataset	Opens an existing feature dataset.
	OpenFeatureQuery	Opens a feature dataset containing a single feature class defined by the specified Query.
	OpenRelationshipClass	Opens an existing relationship class.
	OpenRelationshipQuery	The table of a relationship join query.
	OpenTable	Opens an existing table.                                            //打开存在的表

1、创建一个FeatureClass

public IFeatureClass CreateFeatureClass (
    string Name,IFields Fields,UID CLSID,UID EXTCLSID, esriFeatureType FeatureType,string ShapeFieldName,string ConfigKeyword
);

esriFeatureType见点击打开链接

2、创建FeatureDataset

public IFeatureDataset CreateFeatureDataset (string Name,ISpatialReference SpatialReference
);

3、

public IQueryDef CreateQueryDef (
);

4、

public IFeatureClass OpenFeatureClass (string Name
);

打开一个FeatureClass

(Workspace as IFeatureWorkspace).OpenFeatureClass(FeatureClassName);

创建例子：

        /// <summary>/// 创建要素类/// </summary>/// <param name="workspace"></param>/// <param name="featureDataset"></param>/// <param name="featureClassName"></param>/// <param name="fields"></param>/// <param name="CLSID"></param>/// <param name="CLSEXT"></param>/// <param name="strConfigKeyword"></param>/// <returns></returns>
        public static IFeatureClass CreateFeatureClass(IFeatureDataset featureDataset, String featureClassName, IFields fields){if (_workSpaceInstance == null) return null;IFeatureClass featureClass = null;IFeatureWorkspace featureWorkspace = (IFeatureWorkspace)_workSpaceInstance; // assign the class id value if not assigned
            ESRI.ArcGIS.esriSystem.UID CLSID = null;ESRI.ArcGIS.esriSystem.UID CLSEXT = null;string strConfigKeyword = "";if (CLSID == null){CLSID = new ESRI.ArcGIS.esriSystem.UIDClass();CLSID.Value = "esriGeoDatabase.Feature";}System.String strShapeField = "";// locate the shape field
            for (Int32 j = 0; j < fields.FieldCount; j++){esriFieldType dd = fields.get_Field(j).Type;if (dd == esriFieldType.esriFieldTypeGeometry){strShapeField = fields.get_Field(j).Name;}}// finally create and return the feature class
            if (featureDataset != null){featureClass = featureDataset.CreateFeatureClass(featureClassName, fields, CLSID, CLSEXT, esriFeatureType.esriFTSimple, strShapeField, strConfigKeyword);}return featureClass;}