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Select Distinct From DataSet

This step-by-step article illustrates the equivalent to select distinct values from one or more column of a DataSet or DataTable

Example :

NOTE: Add the following to the top of the code window:

using System.Data;

//Add the following constructor code :

System.Data.DataSet ds = new System.Data.DataSet(); // Create source table System.Data.DataTable dt = new System.Data.DataTable("MyTableName"); dt.Columns.Add("ColumnA", Type.GetType("System.Int32")); dt.Rows.Add(1); dt.Rows.Add(2); dt.Rows.Add(3); dt.Rows.Add(1); Ds.Tables.Add(dt); System.Data.DataView Dv = Ds.Tables["MyTableName"].DefaultView; System.Data.DataTable DtD = Dv.ToTable(true, "ColumnA"); //DtD contains only Distinct values (1,2 and 3)

The command Dv.ToTable(true, .. help you to Select Distinct from Ds DataSet the column : "ColumnA"