/// <summary>
/// 绑定数据
/// </summary>
/// <param name="dataSource">数据源</param>
/// <param name="textfld">文本字段</param>
/// <param name="valuefld">值字段</param>
public RadComboBoxClientCascade BindData(object dataSource, string textfld, string valuefld)
{
box.BindData(dataSource, textfld, valuefld);
AddDefaultItem();
return(this);
}