将字符串转换为双VB [英] Convert String to Double - VB

问题描述

在VB中有一个有效的方法来检查一个字符串是否可以转换为双精度？

Is there an efficient method in VB to check if a string can be converted to a double?

我正在尝试将字符串转换为一个double，然后看看它是否抛出异常。但是这似乎正在减缓我的应用程序。

I'm currently doing this by trying to convert the string to a double and then seeing if it throws an exception. But this seems to be slowing down my application.

Try
    ' if number then format it.
    current = CDbl(x)
    current = Math.Round(current, d)
    Return current
Catch ex As System.InvalidCastException
    ' item is not a number, do not format... leave as a string
    Return x
End Try

推荐答案

如果您使用的是.NET 1.1 / 2.0 / 3.0 / 3.5 / 4.0 / 4.5，请尝试查看Double.TryParse（）

Try looking at Double.TryParse() if you are using .NET 1.1/2.0/3.0/3.5/4.0/4.5

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