如何删除要素类
要想删除一个要素类，那么必须先得到这个，在得到这个要素类的时候，我们要学习一个新的接口IFeatureWorkspace。
IFeatureWorkspace 接口介绍
这个接口主要是用于管理基于矢量数据的，如表，，要素类，要素数据集等。
Members
|
All Properties Methods |
Description | |
|---|---|---|
| CreateFeatureClass | Creates a new standalone feature class under the workspace. | |
| CreateFeatureDataset | Creates a new feature dataset. | |
| CreateQueryDef | Create a query definition object. | |
| CreateRelationshipClass | Creates a new relationship class. | |
| CreateTable | Creates a new table. | |
| OpenFeatureClass | Opens an existing feature class. | |
| 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. |
Classes that implement IFeatureWorkspace
| Classes | Description |
|---|---|
| Sde3Workspace (esriDataSourcesGDB) | ESRI SDE (3.x) Feature Database. |
| Sde4Workspace (esriDataSourcesGDB) | ESRI SDE (4.x) Feature Database. |
| VersionedWorkspace | VersionedWorkspace Object. |
| Workspace | Workspace Object. |
OpenDataset，OpenTable，OpenFeatureClass都是要传入一个相应的名称，如要打开一个名称为PointTest的要素类，只需要在OpenFeatureClass中传入这个要素类的名称，代码如下：
IWorkspaceFactory pWsFt = new AccessWorkspaceFactoryClass();
IWorkspace pWs = pWsFt.OpenFromFile(WsName, 0);
IFeatureWorkspace pFWs = pWs as IFeatureWorkspace;
IFeatureClass pFClass = pFWs.OpenFeatureClass("PointTest");
如果是在ArcMap中，我们会切换到Catalog中然后进入相应的数据库，然后删除相应的要素类，这种操作会让我们想到FeatureClas这个对象会提供删除的方法，其实不然，这个删除的方法是定义在Dataset这
个对象中。
private void button1_Click(object sender, EventArgs e)
{
string WsName = WsPath();
if( WsName !="")
{
IWorkspaceFactory pWsFt = new AccessWorkspaceFactoryClass();
IWorkspace pWs = pWsFt.OpenFromFile(WsName, 0);
IFeatureWorkspace pFWs = pWs as IFeatureWorkspace;
IFeatureClass pFClass = pFWs.OpenFeatureClass("PointTest");
IDataset pDatset = pFClass as IDataset;
pDatset.Delete();
}
}
