构建一个字符串参数以函数 - PowerShell
我想知道如何即时构造字符串作为函数的参数？ 例子 假设我有一个功能，例如
function MyFunc
{
Param
(
[Parameter(mandatory=$true)] [string] $myString,
[Parameter(mandatory=$true)] [int] $myInt
)
Write-Host ("Param 1 is {0}" -f $myString)
Write-Host ("Param 2 is {0}" -f $myInt)
}
我如何称呼它，而在fly上构造第一个字符串参数，例如
$myName = "Casper"
$myInt=7
MyFunc "Name is " + $myName $myInt
我试图将{}放在第一个“ bit”上
MyFunc {Name is " + $myName} $myInt
，然后错误地打印出
Param 1 is "Name is "+$myName
Param 2 is 7
我想打印的内容，
Param 1 is "Name is Casper"
Param 2 is 7
我知道我知道更好的方法这样做的只是首先设置字符串，
$pm1 = "Name is " + $myName
然后调用功能 myfunc $ pm1 $ myint
，但我只是想知道它可以像以前一样即时完成。如何构造字符串并将其作为函数调用上的第一个参数传递？希望那很清楚。
谢谢
Im wondering how you can construct a string on the fly as a parameter to a function?
Example
say I have a function like
function MyFunc
{
Param
(
[Parameter(mandatory=$true)] [string] $myString,
[Parameter(mandatory=$true)] [int] $myInt
)
Write-Host ("Param 1 is {0}" -f $myString)
Write-Host ("Param 2 is {0}" -f $myInt)
}
How can I call it whilst constructing the first string param on the fly e.g.
$myName = "Casper"
$myInt=7
MyFunc "Name is " + $myName $myInt
Ive tried putting {} around the first "bit" like
MyFunc {Name is " + $myName} $myInt
This then incorrectly prints out
Param 1 is "Name is "+$myName
Param 2 is 7
what I want it to print is
Param 1 is "Name is Casper"
Param 2 is 7
I know a better way of doing this would just be to set up the string first,
$pm1 = "Name is " + $myName
and call function
MyFunc $pm1 $myInt
but I am just interested to know how it can be done on the fly as it were. How can I construc the string and pass as first parameter on the function call? Hope thats clear.
Thanks
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作为一般的经验法则，您可以随时使用子表达操作员
$（...）或分组操作员（...）分组操作员 ，您始终可以在单独的管道中嵌套任何复杂的表达式。 ：但是，在您的特殊情况下，我们不需要 - 您只需要在字符串文字中放置变量表达式
$ myname，并且PowerShell将自动评估和扩展其值：如果变量表达式是紧随其后的是一些字符，否则这些字符将构成变量路径的有效部分，使用curly括号
{}作为预选赛：As a general rule of thumb, you can always nest any complex expression in a separate pipeline using the subexpression operator
$(...)or grouping operator(...):But in your particular case we don't need that - you just need to place the variable expression
$myNameinside the string literal and PowerShell will automatically evaluate and expand its value:If the variable expression is to be followed by some characters that would otherwise make up a valid part of the variable path, use curly brackets
{}as qualifiers: