使用Arcengine 的DataStatistics获取独一无二的记录

通过sql语句discint可以查询不重复的记录，但这个对shapefile是不适用的，dbf数据不支持这个语法，看了下arcengine中的DataStatistics可以实现这样的需求。这个取得的数据是对shapefile也适用的。

相关代码如下：

///



        /// 使用DataStatistics获取独一无二的记录,对shapefile文件也适用

        ///



        /// 查询的游标

        /// 字段

        ///

        public static System.Collections.IEnumerator GetUniqueValue(ICursor pCursor, string field)
        {
            DataStatistics pData = new DataStatistics();
            pData.Field = field;
            pData.Cursor = pCursor;

            System.Collections.IEnumerator enumerator = pData.UniqueValues;
            enumerator.Reset();
            while (enumerator.MoveNext())
            {
                object myObject = enumerator.Current;
                Console.WriteLine("Value - {0}", myObject.ToString());
            }
            
            return pData.UniqueValues;
        }

 
相关调用如下：

    private void button1_Click(object sender, EventArgs e)
    {
        IFeatureClass pFeatClass; //通用的
        IWorkspaceFactory pWorkspaceFactory;
        IFeatureWorkspace pFeatWS;

        //打开工作空间并添加shp文件
        string filename = "d://temp//008-019l_Line.shp";
        pWorkspaceFactory = new ShapefileWorkspaceFactoryClass();
        pFeatWS = pWorkspaceFactory.OpenFromFile(@"D:\temp\", 0) as IFeatureWorkspace;

        pFeatClass = pFeatWS.OpenFeatureClass("008-019l_Line");

        ICursor pCursor =pFeatClass.Search(null, false) as ICursor;
        System.Collections.IEnumerator debug = CommonFuction.GetUniqueValue(pCursor, "编码");
        //object test = debug.Next();

    }