技巧

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Math.Ceiling (Decimal)	返回大于或等于指定的十进制数的最小整数。
Math.Ceiling (Double)	返回大于或等于该指定双精度浮点数的最小整数

如Math.Ceiling (1.1)=2;      Math.Ceiling (1.0)=1;

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1、嵌套控件的数据绑定：
private void dlSort_ItemDataBound(e，e)
{
if(e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem)
{
DataGrid objDg = (DataGrid)e.Item.FindControl("dgSubSort");
Isort iSort = new sortImpl();
objDg.DataSource=iSort.GetSubList(Convert.ToInt32(DataBinder.Eval(e.Item.DataItem, "sort_id")));
objDg.DataBind();
}
}