winform+sql server 中怎么把查询出来的数据全部绑定在comboBox里

/// <summary>
/// 绑定下拉框
/// </summary>
/// <param name="ddl">下拉框</param>
/// <param name="dt">DataTable数据源</param>
/// <param name="sValue">值</param>
/// <param name="sName">显示内容</param>
public static void BindDDL(ComboBox ddl, DataTable dt, string sValue, string sName)
{

ddl.ValueMember = sValue;
ddl.DisplayMember = sName;
ddl.DataSource = dt;
}