PowerShell：ConvertFrom-StringData逆向操作及哈希表存回文件的更优方法

Great question! Let's start by confirming: your current approach works perfectly, and it's actually the most straightforward general-purpose solution for this scenario.

First, the quick context: PowerShell doesn't have a built-in counterpart to ConvertFrom-StringData specifically for writing hashtables back to key=value formatted text. That said, we can simplify your existing code for cleaner syntax, and handle edge cases if needed.

Simplified Versions of Your Current Approach #

Your core logic is solid—enumerating the hashtable's key-value pairs and formatting each line as key=value is exactly what you need. Here are a few more concise ways to write it:

For PowerShell 5.1 and above

Use string interpolation instead of the -f format operator for more readable code:

$values.GetEnumerator() | ForEach-Object { "$($_.Name)=$($_.Value)" } | Set-Content $Path

For PowerShell 7+

Leverage the Join-String cmdlet to cut out the explicit ForEach-Object (this is mostly a syntax shortcut, but cleans up the line):

$values.GetEnumerator() | Join-String -Property { "$($_.Name)=$($_.Value)" } | Set-Content $Path

Handling Special Characters #

If your hashtable values contain characters like = or \ (which have special meaning to ConvertFrom-StringData), you'll want to escape them to ensure the file can be read back correctly. Here's how to adjust your code for that:

$values.GetEnumerator() | ForEach-Object {
    # Escape = and \ to match ConvertFrom-StringData's parsing rules
    $escapedValue = $_.Value -replace '([=\\])', '\$1'
    "$($_.Name)=$escapedValue"
} | Set-Content $Path

Why There's No "One-Cmdlet" Solution #

The reason there's no direct reverse of ConvertFrom-StringData is that key=value files are a simple, ad-hoc format—unlike structured formats like JSON or XML, which have dedicated ConvertTo-* cmdlets. Your original approach is essentially the de facto standard for this task in PowerShell.

内容的提问来源于stack exchange，提问作者Jirmed