如何从 powershell 哈希表中获取字符串数组的值

Question

我有一个包含键值对的哈希数组 table，如下所示：

$myTest = @{};
$test1 = @{
    Name = "Food1"
    Value = "Sandwich"
    }
    $test2 = @{
    Name = "Food2"
    Value = "Salad"
    }
$myTest["Food1"] = $test1;
$myTest["Food2"] = $test2

在运行命令上 $myUpdatedTest = $myTest.Values | ConvertTo-Json -Compress

给出值 $myUpdatedTest --> [{"Value":"Sandwich","Name":"Food1"},{"Value":"Salad","Name":"Food2"}]

如果我只将 $test1 添加到 $myTest，那么该值将作为 {"Value":"Sandwich","Name":"Food1"} 但在后一种情况下，我希望值在 [] 内 --> [{"Value":"Sandwich","Name":"Food1"}] 有没有办法实现这一点。

Answer 1

有点笨拙，但这很有效：

$myTest = @{};
$test1 = @{
Name = "Food1"
Value = "Sandwich"
}
$test2 = @{
Name = "Food2"
Value = "Salad"
}
$myTest["Food1"] = $test1;
$myTest["Food2"] = $test2

if($myTest){

    if($myTest.Count -eq 1){

        $myUpdatedTest = "[$($myTest.Values | ConvertTo-Json -Compress)]"
    }else{

        $myUpdatedTest = $myTest.Values | ConvertTo-Json -Compress
    }
}

$myUpdatedTest

Answer 2

问题在于您如何将对象发送到 ConvertTo-Json cmdlet。

我通过更改

设法使它工作

$myUpdatedTest = $myTest.Values | ConvertTo-Json -Compress

到

$myUpdatedTest = ConvertTo-Json -Compress -InputObject $myTest.Values

然后这会评估整个 $myTest.Values 对象，而不是逐一评估每个值。我希望这是有道理的？

如何从 powershell 哈希表中获取字符串数组的值

How to get the value as an array of strings from powershell hashtable

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hashtable

key-value

script