How can bind combo box with datasource in windows application?

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SQL-Server-2005

.NET

SQL-Server

Dear,

I have use one combo box.I have to bind this combo box with data source which have only one column.I am using These coding,but i can't get answer.Kindly give me the solution.

con.Open();
           da = new SqlDataAdapter("select*from operator",con);
           DataTable dt1 = new DataTable();
           da.Fill(dt1);
           cmbOperator.DataSource = dt1;
           //cmbOperator.DisplayMember = "Operator";
           //cmbOperator.ValueMember = "ID";

con.Close();

Thanks&Regards,
Viswanathan.M