Datagrid update - insert

Question

Can someone tell me what is wrong with this code? #region Using directives using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Data.OleDb; using System.Drawing; using System.Text; using System.Windows.Forms; using soForms; #endregion namespace Thai_Dictionary { partial class frmWords : MNLForm { OleDbConnection myConn; OleDbDataAdapter myAdapter; DataSet ds; OleDbParameter workParam = null; string myQuery = "select ID, Word from Thai"; public frmWords() { InitializeComponent(); ConnectToData(); // establish database connection and create DataSet grdThaiWords.DataSource = ds.Tables[0].DefaultView; //myGrid.SetDataBinding(ds, "CardTest"); DataTable t = ds.Tables[0]; t.RowChanged += new DataRowChangeEventHandler(Row_Changed); } private void Words_Load(object sender, EventArgs e) { } public void ConnectToData() { ds = new DataSet(); myConn = new OleDbConnection(System.Configuration.ConfigurationSettings.ConnectionStrings["Dictionary"].ConnectionString); myAdapter = new OleDbDataAdapter(); myAdapter.SelectCommand = new OleDbCommand(myQuery, myConn); myAdapter.Fill(ds, "Thai"); insertCommand(); updateCommand(); } public void updateCommand() { string updateQuery = "Update Thai Set Word = @Word WHERE ID = @ID"; myAdapter.UpdateCommand = new OleDbCommand(updateQuery, myConn); workParam = myAdapter.UpdateCommand.Parameters.Add("@Word", OleDbType.Char); workParam.SourceColumn = "Word"; workParam.SourceVersion = DataRowVersion.Current; } private void Row_Changed(object ob, DataRowChangeEventArgs e) { DataTable t = (DataTable)ob; Console.WriteLine("RowChanged " + e.Action.ToString() + "\t" + e.Row.ItemArray[0]); } public void insertCommand() { string insertQuery = "Insert into Thai VALUES (@Word)"; myAdapter.InsertCommand = new OleDbCommand(insertQuery, myConn); workParam = myAdapter.InsertCommand.Parameters.Add("@Word", OleDbType.Char); workParam.SourceColumn = "Word"; workParam.SourceVersion = DataRowVersion.Current; } public void UpdateValue() { try { myAdapter.Update(ds, "CardTest"); Console.Write("Updating DataSet succeeded!"); } catch (Exception e) { Console.Write(e.ToString()); } } } }