从空间数据库中删除所有拓扑对象

1. /// 
2.         /// //从空间数据库中删除所有拓扑对象
3.         /// 
4.         /// 
5.         public bool DeleteALLTopolgyFromGISDB()
6.         {
7.             bool rbc = true;
8.             try
9.             {
10.                 IWorkspace ws = this.DefaultWorkSpace;
11.                 if (ws != null)
12.                 {
13.                     //读取所有拓扑
14.                     IEnumDataset topEnumDataset = this.getEnumDataset(ws);
15.                     if (topEnumDataset != null)
16.                     {
17.                         topEnumDataset.Reset();
18.                         IDataset ds = topEnumDataset.Next();
19.                         while (ds != null)
20.                         {
21.                             switch (ds.Type)
22.                             {
23.                                 case esriDatasetType.esriDTFeatureDataset:
24.                                     if (ds is ITopologyContainer)
25.                                     {
26.                                         ITopologyContainer topContainer = ds as ITopologyContainer;
27.                                         ISchemaLock schemaLock = (ISchemaLock)ds;
28.                                         try
29.                                         {
30.                                             schemaLock.ChangeSchemaLock(esriSchemaLock.esriExclusiveSchemaLock);
31.                                             int tc = topContainer.TopologyCount;
32.                                             for (int i = tc - 1; i >= 0; i--)
33.                                             {
34.                                                 ITopology top = topContainer.get_Topology(i);
35.                                                 if (top != null && top is IDataset)
36.                                                 {
37.                                                     //delete top's ITopologyRuleContainer 
38.                                                     ITopologyRuleContainer topruleList = top as ITopologyRuleContainer;
39.                                                     IEnumRule ER = topruleList.Rules;
40.                                                     ER.Reset();
41.                                                     IRule r = ER.Next();
42.                                                     while (r != null && r is ITopologyRule)
43.                                                     {
44.                                                         topruleList.DeleteRule(r as ITopologyRule);
45.                                                         r = ER.Next();
46.                                                     }
47.                                                     //delete top's featureclass
48.                                                     IFeatureClassContainer topFcList = top as IFeatureClassContainer;
49.                                                     for (int d = topFcList.ClassCount - 1; d >= 0; d--)
50.                                                     {
51.                                                         top.RemoveClass(topFcList.get_Class(d) as IClass);
52.                                                     }
54.                                                     //delete top object
55.                                                     (top as IDataset).Delete();
56.                                                     rbc = true;
57.                                                 }
58.                                             }
59.                                         }
60.                                         catch (Exception ex)
61.                                         {
62.                                             AppLogErrWrite.WriteErrLog(ex.ToString());
63.                                         }
64.                                         finally 
65.                                         {
66.                                             schemaLock.ChangeSchemaLock(esriSchemaLock.esriSharedSchemaLock);
67.                                         }
68.                                     }
69.                                     break;
70.                                 case esriDatasetType.esriDTFeatureClass:
71.                                     break;
72.                             }
73.                             System.Runtime.InteropServices.Marshal.ReleaseComObject(ds);
74.                             ds = topEnumDataset.Next();
75.                         }
76.                         System.Runtime.InteropServices.Marshal.ReleaseComObject(topEnumDataset);
77.                     }//
78.                 } //end ws!=null
79.             }
80.             catch (Exception ee)
81.             {
82.                 rbc = false;
83.                 AppLogErrWrite.WriteErrLog(ee.ToString());
85.             }
86.             return rbc;
87.         }