Question

我尝试从哈希表创建自定义对象以管道导出到Csv。但是，当我创建csv文件时，属性都是乱序的。我在下面写了评论以显示订单。

function CreateStatusCustomObject
{
    param([Parameter(Mandatory=$true)][Hashtable]$Values)

    $statusCustomObject = New-Object -TypeName PSObject        

    foreach($value in $Values.GetEnumerator())
    {
        $statusCustomObject | Add-Member -MemberType NoteProperty -Name $value.Name -Value $value.Value
    }

    return $statusCustomObject
}

$Cec = 'a'
$DnsServer = 'b'
$subnetInfoCidr = 'c'
$oldServerRefreshIntervalValue = 'd'
$anotherProperty = 'e'

$statusCustomObject = CreateStatusCustomObject @{Cec = $Cec; #2
                                                DnsServer = $DnsServer; #5
                                                Cidr = $subnetInfoCidr; #1
                                                OldServerRefreshIntervalValue = $oldServerRefreshIntervalValue;#3
                                                AnotherProperty = $anotherProperty} #4

如何强制订单成为哈希表中的内容？

Answer 1

您可以使用[ordered]类型加速器。我认为这是在PowerShell v3中引入的。

在你的情况下，这应该可以解决问题：

$statusCustomObject = CreateStatusCustomObject [ordered]@{Cec = $Cec;
                                                          DnsServer = $DnsServer;
                                                          Cidr = $subnetInfoCidr;
                                                          OldServerRefreshIntervalValue = $oldServerRefreshIntervalValue;
                                                          AnotherProperty = $anotherProperty}

在幕后，创建的对象实际上是一个OrderedDictionary。

由于这仍然依赖于PowerShell 3，你也可以直接创建你的对象（并跳过函数......假设我有一个特定的原因，我错过了），这样：

$statusCustomObject = [pscustomobject]@{
    Cec = $Cec
    DnsServer = $DnsServer
    Cidr = $subnetInfoCidr
    OldServerRefreshIntervalValue = $oldServerRefreshIntervalValue
    AnotherProperty = $anotherProperty
}

结果应该是正确的顺序，但如果没有，你可以组合加速器（例如[pscustomobject][ordered]@{}）

Answer 2

我会用下面的模式解决问题。

<强> CODE

#data

$listofitems = @()

$myDataItem = [PSCustomOBject]@{
    Cec = 'a'
    DnsServer = 'b'
    subnetInfoCidr = 'c'
    oldServerRefreshIntervalValue = 'd'
    anotherProperty = 'e'
}

$listofitems += $myDataItem

$myDataItem = [PSCustomOBject]@{
    Cec = 'a1'
    DnsServer = 'b1'
    subnetInfoCidr = 'c1'
    oldServerRefreshIntervalValue = 'd1'
    anotherProperty = 'e1'
}

$listofitems += $myDataItem

cls
Write-Output "all properties"
$listofitems | ConvertTo-Csv -NoTypeInformation

Write-Output "`r`nproperties in my own order"
$listofitems | Select oldServerRefreshIntervalValue, DnsServer | ConvertTo-Csv -NoTypeInformation

<强>输出

all properties
"Cec","DnsServer","subnetInfoCidr","oldServerRefreshIntervalValue","anotherProperty"
"a","b","c","d","e"
"a1","b1","c1","d1","e1"

properties in my own order
"oldServerRefreshIntervalValue","DnsServer"
"d","b"
"d1","b1"

Answer 3

你也可以对你的功能进行分类，如下所示：

function CreateStatusCustomObject
{
    param([Parameter(Mandatory=$true)][Hashtable]$Values)

   $statusCustomObject = New-Object -TypeName PSObject

   $Values.Keys | sort -CaseSensitive | %{
   $key=$_;$value=$Values[$_];
   $statusCustomObject | Add-Member -MemberType NoteProperty -Name $key -Value $value
   }

    return $statusCustomObject
}

哈希表中的属性顺序

3 个答案: