powershell - 替换/重命名对象属性名称

Question

如果 dns 解析成功，我需要将“ip-netmask”替换为“fqdn”。

此脚本将用于替换配置文件中的值。

如果解析了DNS，我需要将“ip-netmask”的属性名称更改为“fqdn”，并将新的dns 值存储在其下。该脚本解析 DNS 并仅在成功时更新 ip-netmask，如果成功，还会添加具有 DNS 值的 fqdn 属性。

似乎我在那里，但我无法将 ip-netmask 重命名为 fqdn，或者只是删除 ip-netmask 属性而不使我的 fqdn 属性为空

来自原始的json输入

@'
{
    "entry":[
        {
            "@name":"31.170.162.203",
            "ip-netmask":"31.170.162.203",
            "description":"test1"
        },
        {
            "@name":"37.193.217.222",
            "ip-netmask":"37.193.217.222",
            "description":"test2"
        },
        {
            "@name":"46.17.63.169",
            "ip-netmask":"46.17.63.169",
            "description":"test3"
        }
    ]
}

$a = Get-Content 'C:\Users\e\Desktop\puttytest1.json' | ConvertFrom-Json



$a.entry | ForEach-Object {

    if ($namehost = (Resolve-DnsName $_.'ip-netmask').namehost) {

        $_.'ip-netmask' = $namehost

        $_ | Add-Member -MemberType AliasProperty -Name fqdn -Value ip-netmask

        }
    }

$newjson = $a | ConvertTo-Json

$newjson

输出

{

    "entry":  [

                  {

                      "@name":  "31.170.165.68",

                      "ip-netmask":  "31.170.165.68",

                      "description":  "Test1"

                  },

                  {

                      "@name":  "31.170.162.203",

                      "ip-netmask":  "31.170.162.203",

                      "description":  "test2"

                  },

                  {

                      "@name":  "37.193.217.222",

                      "ip-netmask":  "l37-193-217-222.novotelecom.ru",

                      "description":  "test3",

                      "fqdn":  "l37-193-217-222.novotelecom.ru"

                  }

]

}

Answer 1

您不应尝试重命名现有属性，而应将其删除并将新的 NoteProperty 添加到对象，如下所示:

$newjson = $a.entry | ForEach-Object {
    if ($namehost = (Resolve-DnsName $_.'ip-netmask').namehost) {
        # remove the 'ip-netmask' property
        $_.PSObject.Properties.Remove('ip-netmask')
        # add a new NoteProperty 'fqdn'
        $_ | Add-Member -MemberType NoteProperty -Name 'fqdn' -Value $namehost
    }
} | ConvertTo-Json

但是，我相信您使用错误的方法从 IP 地址检索 fqdn。这不应该是:

$newjson = $a.entry | ForEach-Object {
    if ($namehost = [System.Net.Dns]::GetHostByAddress($($_.'ip-netmask')).HostName) {
        # remove the 'ip-netmask' property
        $_.PSObject.Properties.Remove('ip-netmask')
        # add a new NoteProperty 'fqdn'
        $_ | Add-Member -MemberType NoteProperty -Name 'fqdn' -Value $namehost
    }
} | ConvertTo-Json

希望对你有帮助

---

根据您的评论，属性的显示顺序对您很重要。

要维护该顺序，请使用

$newjson = $a.entry | ForEach-Object {
    if ($namehost = (Resolve-DnsName $_.'ip-netmask').namehost) {
        # output a new object with properties ordered like you want them to be
        $_ | Select-Object '@name', @{Name = 'fqdn'; Expression = {$namehost}}, 'description'
    }
    else { 
        # output the object unchanged
        $_ 
    }
} | ConvertTo-Json