Make an OleDbConnection.
Create DataTable from OleDbDataReader.
Sample code:
//include this using System.Data.OleDb; //declare OleDbConnection OCON = null; OleDbDataReader ODR = null; //create connection OCON = new OleDbConnection(@"Provider=SQLOLEDB;Data Source=192.168.0.1;Initial Catalog=TESTDATABASE;User ID=TESTUSER;Password=TESTPASS;"); try{ //open connection OCON.Open(); //create command OleDbCommand OCMD = null; OCMD.CommandText = "SELECT ID, DESCRIPTION FROM TABLE"; //execute command ODR = OCMD.ExecuteReader(); //load datareader to datatable DataTable DT = new DataTable(); DT.Load(ODR); //attach datatable to combobox comboBox1.DisplayMember = "DESCRIPTION"; comboBox1.ValueMember = "ID"; comboBox1.DataSource = DT; //close connection OCON.Close(); }catch(OleDbException ex){ MessageBox.Show(ex.ToString()); }Additional Reading at :