如何将对象转换为字符串? [英] How to convert an object to a string?

问题描述

我想分配当前目录的名称来构造并行目录的路径(运行一些差异命令).

I want to assign the name of the current directory to construct the path of a parallel directory (to run some diff commands).

但是当我这样做时:

New-Item -ItemType Directory -Name my_test_dir;
Set-Location my_test_dir;
$a = $( Get-Item . | Select-Object Name ); 
write-host( "x${a}x" );

我明白

x@{Name=my_test_dir}x

x@{Name=my_test_dir}x

而不是我预期的:

xmy_test_dirx

xmy_test_dirx

那么，我如何拆箱"目录名称?

So, how do I "unbox" the name of the directory?

PS - 为了便于测试，我使用:

PS - for ease of testing I use:

mkdir my_test_dir; cd my_test_dir; $a = $( Get-Item . | Select Name ); echo "x${a}x"; cd ..; rmdir my_test_dir

推荐答案

当您使用 ... |Select-Object PropertyName 时，它会生成一个具有名为 PropertyName 的属性的对象code>，从输入项上的相应属性中复制值.

When you use ... |Select-Object PropertyName, it produces an object with a property named PropertyName, copying the value from the corresponding property on the input item.

使用 Select-Object -ExpandProperty PropertyName 或 ForEach-Object MemberName 来获取属性的值:

Use Select-Object -ExpandProperty PropertyName or ForEach-Object MemberName to get just the value of the property:

$a = Get-Item . | Select-Object -ExpandProperty Name 
# or 
$a = Get-Item . | ForEach-Object Name

... 或直接引用属性:

... or reference the property directly:

$a = (Get-Item .).Name

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