AO解锁shp文件

AO开发中加载shp文件后，无论删除对象还是垃圾回收都不能解除shp文件的锁定，导致在其他地方无法对该图层进行操作，只有关闭应用程序才能删除加锁文件，彻底释放资源。

其实，AO中有专门的代码解除资源锁定，解锁文件：

1、存在接口IWorkspaceFactory的情况

IWorkspaceFactory pwf = new ShapefileWorkspaceFactory();
//关闭资源锁定   
IWorkspaceFactoryLockControl ipWsFactoryLock = (IWorkspaceFactoryLockControl)pwf;
if (ipWsFactoryLock.SchemaLockingEnabled)
{
    ipWsFactoryLock.DisableSchemaLocking();
}

2、仅已知接口IFeatureClass的情况

/// <summary>
/// 解锁IFeatureClass锁定的资源
/// </summary>
/// <param name="pFeatureClass">锁定资源的要素类</param>
/// <param name="releaseComObject">false-默认，不释放要素类；true-解锁并释放要素类</param>
public static void UnlockResource(IFeatureClass pFeatureClass, bool releaseComObject = false)
{
    if (pFeatureClass == null) return;
    IWorkspace pWorkspace = ((IDataset)pFeatureClass).Workspace;
    if (pWorkspace == null) return;
    //关闭资源锁定
    try
    {
        IWorkspaceFactoryLockControl ipWsFactoryLock = (IWorkspaceFactoryLockControl)pWorkspace.WorkspaceFactory;
        if (ipWsFactoryLock != null && ipWsFactoryLock.SchemaLockingEnabled)
            ipWsFactoryLock.DisableSchemaLocking();
        if (releaseComObject)
            ComReleaser.ReleaseCOMObject(pFeatureClass);
    }
    catch (Exception ex)
    {
    }
}