转换为双精度(错误) [英] converting to double (error)

问题描述

我正在将字符串转换为双精度

i am converting a string to double

我想提前知道将字符串转换为双精度值是否会出错.例如，如果我尝试将hello"转换为双精度值，它会给我一个错误.

i would like to know in advanced whether it would case an error to convert a string to a double. for example if i try to convert "hello" to a double, it would give me an error.

有没有办法让我提前知道转换某些东西是否会导致错误?

is there a way for me to know ahead of time whether converting something will cause an error?

推荐答案

你想要 Double.TryParse:

Dim PossibleDouble as Double
If Double.TryParse("hello", PossibleDouble) Then
  ''//Success!
Else
  ''//Not a double
End If

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