Sql Clr用户定义类型解析浮点数并失去精度

我有一个Clr用户定义类型,它接受由逗号分隔的字符串值。

在转换为这种类型时,我失去了一点精度,我把它缩小到这行代码:

cast(cast(nlinkjt as nvarchar(100)) + ',' +cast(avglrwf as nvarchar(100)) + ',' + cast(avglrwfjt as nvarchar(100)) as dbo.CLRJourneyTime) as clrJT

输出=29.9376,5.29633e-005,0.00158559

但原始值如下:

nlinkjt = 29.9376097988521  = cast(nlinkjt as nvarchar)  = 29.9376
avglrwf = 5.29632961843163E-05  = cast(avglrwf as nvarchar) = 5.29633e-005
avglrwfjt =  0.00158559449482709  = cast(avglrwfjt as nvarchar) = 0.00158559

如何将浮点数完全转换为字符串?

或者是否有另一种方式来声明新的dbo。CLRJourney就像你在.net上一样 像这样:

'new dbo.CLRJourneyTime(nlinkjt , avglrwf , avglrwfjt ) as clrJT'