Question

我有一组运行如下的查询字符串：

var nq = db.QueryValue("select COALESCE(COUNT(*),0)from OPPORTUNITY where START_DATE = DATEDIFF(d,0,getdate())");  
var nrt = db.QueryValue("select COALESCE(COUNT(*),0)from OPPORTUNITY where START_DATE = DATEDIFF(d,0,getdate()) and OPPORTUNITY_STAGE = '-1'");  
var nrep = nrt / nq;

所有它给我的是未处理的例外：不能除以零。

前两个查询结果中的任何一个或两个都经常会出现零。如何让它显示NaN（不是数字）而不是崩溃？

我确定我之前已经问过这个，但我似乎无法找到答案。

提前致谢。

Answer 1

如何添加IF条件？

var nq = db.QueryValue("select COALESCE(COUNT(*),0)from OPPORTUNITY where START_DATE = DATEDIFF(d,0,getdate())");

var nrep = 0;
if (nq != 0)
{
var nrt = db.QueryValue("select COALESCE(COUNT(*),0)from OPPORTUNITY where START_DATE = DATEDIFF(d,0,getdate()) and OPPORTUNITY_STAGE = '-1'");
nrep = nrt / nq;
}

Answer 2

您可以简单地替换

var nrep = nrt / nq;

与

Double nrep = Double.NaN;
if (nq != 0)
{
    nrep = nrt / nq;
}

如何在asp.net razor中修复除零

2 个答案: