I have received a data table from the SQL server and for now, I want to show those records that "vocId" is equal to 1. but the following code represents all records. what can I do to fix it?

 DataTable dt = new DataTable();
 DataTable dtFetch = new DataTable();
 dt = cls.sentencesFetch();
 var result = from r in dt.AsEnumerable()
              where r.Field<int>("vocId").ToString() == 1.ToString()
              select r;
 DataView view = result.AsDataView();
 dtFetch = view.Table;
 dgv.DataSource = dtFetch;