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  • arcgis 查询 group by order by

    IQueryDef2 queryDef2 = (IQueryDef2)featureWorkspace.CreateQueryDef();

    // Specify the table and fields to query.
    queryDef2.Tables = "Cities";
    queryDef2.SubFields = "Name, Pop1996";
    queryDef2.PostfixClause = "ORDER BY Pop1996 DESC";


    // Execute the query.using(ComReleaser comReleaser = new ComReleaser())
    {
        ICursor cursor = queryDef2.Evaluate2(true);
        comReleaser.ManageLifetime(cursor);
        int nameIndex = cursor.FindField("Name");
        int pop1996Index = cursor.FindField("Pop1996");
        IRow row = null;
        while ((row = cursor.NextRow()) != null)
        {
            String cityName = Convert.ToString(row.get_Value(nameIndex));
            int population = Convert.ToInt32(row.get_Value(pop1996Index));
            Console.WriteLine("{0}: {1}", cityName, population);
        }
    }

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  • 原文地址:https://www.cnblogs.com/gisoracle/p/2852642.html
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