VB.NET How do I reduce int to 1 decimal place?

Question

I'm using the code below to convert the file size in bytes (test file is 31718 bytes) to KB (30.974609375 KB) but I want to display this to one decimal place (ie 30.9 KB). How would I do this in VB.NET?

New FileInfo(FileName).Length / 1024

Thanks

Answer 1

Math.Round(New FileInfo(FileName).Length / 1024,1)

Answer 2

如果它只是显示输出，你需要它舍入，然后使用ToString中的格式

Double.ToString("0.0")

Answer 3

如果你需要它被截断，但不是圆形（如你的例子所示），那么使用Math.FLoor（）

   Decimal val = Math.Floor(New FileInfo(FileName).Length / 102.4) / 10;