/// <summary>
 /// 添加列(多表头)
 /// </summary>
 /// <param name="index">行号,请按照顺序传递</param>
 /// <param name="fgColumn"></param>
 public void Columns(Int32 index, FluentGridColumn fgColumn)
 {
     if (Control.Columns.Count - 1 < index)
         Control.Columns.Add(new List<GridColumn>());
     Control.Columns[index].Add(fgColumn.Column);
 }
 /// <summary>
 /// 添加列(单表头)
 /// </summary>
 /// <param name="columns"></param>
 /// <returns></returns>
 public void Columns(FluentGridColumn fgColumn)
 {
     Control.Columns[0].Add(fgColumn.Column);
 }