from:http://www.cnblogs.com/3echo/archive/2006/08/16/478094.html
1 /// <summary>
2 /// 得到要素类某字段的唯一值
3 /// </summary>
4 /// <param name=”pFeatureClass”>要素类</param>
5 /// <param name=”strFld”>指定要得到唯一值的字段</param>
6 /// <returns>唯一值字符数据</returns>
7 List<string> GetUniqueValue(IFeatureClass pFeatureClass, string strFld)
8 {
9 List<string> lst = new List<string>();
10 //得到IFeatureCursor游标
11 IFeatureCursor pCursor = pFeatureClass.Search(null, false);
12
13 //coClass对象实例生成
14 IDataStatistics pData = new DataStatisticsClass();
15 pData.Field = strFld;
16 pData.Cursor = pCursor as ICursor;
17
18 //枚举唯一值
19 IEnumerator pEnumVar = pData.UniqueValues;
20
21 //记录总数
22 int RecordCount = pData.UniqueValueCount;
23
24 //字符数组
25 pEnumVar.Reset();
26
27 while (pEnumVar.MoveNext())
28 {
29 lst.Add(pEnumVar.Current.ToString());
30 }
31
32 return lst;
33 }
3 /// </summary>
4 /// <param name=”pFeatureClass”>要素类</param>
5 /// <param name=”strFld”>指定要得到唯一值的字段</param>
6 /// <returns>唯一值字符数据</returns>
7 List<string> GetUniqueValue(IFeatureClass pFeatureClass, string strFld)
8 {
9 List<string> lst = new List<string>();
10 //得到IFeatureCursor游标
11 IFeatureCursor pCursor = pFeatureClass.Search(null, false);
12
13 //coClass对象实例生成
14 IDataStatistics pData = new DataStatisticsClass();
15 pData.Field = strFld;
16 pData.Cursor = pCursor as ICursor;
17
18 //枚举唯一值
19 IEnumerator pEnumVar = pData.UniqueValues;
20
21 //记录总数
22 int RecordCount = pData.UniqueValueCount;
23
24 //字符数组
25 pEnumVar.Reset();
26
27 while (pEnumVar.MoveNext())
28 {
29 lst.Add(pEnumVar.Current.ToString());
30 }
31
32 return lst;
33 }
