简单的四舍五入

一.sql

CAST('123.456' as decimal) 将会得到 123（小数点后面的将会被省略掉）。 
如果希望得到小数点后面的两位。 
则需要把上面的改为 
CAST('123.456' as decimal(38, 2)) ===>123.46 
自动四舍五入了！ 
ALTER TRIGGER Trigger10
ON dbo.dd
FOR /* INSERT, UPDATE, DELETE */insert
AS
declare @a float
if(select bz from inserted)=0
begin
select @a=convert(float,interest) from loan where loanname='短期贷款'
end
else
begin
select @a=convert(float,interest) from loan where loanname='高利贷'
end

if(select ddxm from inserted)='借款金额'
begin
insert into dd 
 select inserted.projectid,inserted.marketid,inserted.marketyear+1,
 inserted.marketquart,'还本付息', CAST(convert(float,inserted.ddje)*( 1+@a ) as decimal),inserted.bz,0  from inserted
end 

二.C#

 保留两位小数：          string jzcsyl =(jlr / cs* 100).ToString ("0.00")+ "%";

三.JavaScript
/* * ForDight(Dight,How):数值格式化函数，Dight要 * 格式化的 数字，How要保留的小数位数。 */  

1.function  ForDight(Dight,How)
{ 

var Dight = Math.round (Dight*Math.pow(10,How))/Math.pow(10,How); 

return Dight; 

}

2.<script>
var c=(parseFloat(document .getElementById("ddlxhf").value))*(parseFloat(document .getElementById("TextBox4").value));
document .getElementById ("TextBox5").value=Math .round( parseFloat(c)*100/100)

</script>

本文转自叶子文文博客51CTO博客，原文链接http://blog.51cto.com/leafwf/186161如需转载请自行联系原作者

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