Vb.net net中，将字符串末尾的任何数字替换为占位符

我有很多字符串的末尾都有数字。数字可以是任意大小，例如：

myvar123
mysecondvar3
mythirdvar219107

my2varable123
some123variable9480395

my2varable123            should become:   my2variable%placeholder%
some123variable9480395   should become:   some123variable%placeholder%

字符串甚至可以在名称中包含数字，而不仅仅是在末尾。 例如：

myvar123
mysecondvar3
mythirdvar219107

my2varable123
some123variable9480395

my2varable123            should become:   my2variable%placeholder%
some123variable9480395   should become:   some123variable%placeholder%

我需要用占位符替换末尾的任何数字。不是varname里面的那些

例如：

myvar123
mysecondvar3
mythirdvar219107

my2varable123
some123variable9480395

my2varable123            should become:   my2variable%placeholder%
some123variable9480395   should become:   some123variable%placeholder%

我想到的唯一方法是使用.right遍历字符串，如果是数字字符，则删除该字符，直到找到第一个非数字字符。然后在最后附加占位符，但对于一个相当简单的问题来说，这看起来需要做很多工作

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有更好的方法吗？

您可以使用正则表达式

Dim str As String = "some123variable9480395"
Dim pattern As String = "\d+$"
Dim replacement As String = "%placeholder%"
Dim rgx As Regex = New Regex(pattern)
Dim result As String = rgx.Replace(str, replacement)

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你可以用正则表达式来做这个

Dim str As String = "some123variable9480395"
Dim pattern As String = "\d+$"
Dim replacement As String = "%placeholder%"
Dim rgx As Regex = New Regex(pattern)
Dim result As String = rgx.Replace(str, replacement)