powershell - 在PowerShell中组装字符串文件的最佳方法

Question

我有一个哈希/数组结构，我想用它来组装几个文本文件。这是实现此目标的最佳方法吗？

$resolutions = @(
    @{"bitrate" = 1100; "width" = 1920; "height" = 1080};
    @{"bitrate" = 800; "width" = 800; "height" = 448};
    @{"bitrate" = 400; "width" = 800; "height" = 448};
    @{"bitrate" = 128; "width" = 800; "height" = 448};
    @{"bitrate" = 64; "width" = 800; "height" = 448}
)

$metadata =
@"
<xml>
    <targets>`r`n
"@

foreach ($resolution in $resolutions)
{
    $metadata += "        <target>`r`n"
    $metadata += "            <bitrate>$($resolution["bitrate"])</bitrate>`r`n"
    $metadata += "            <width>$($resolution["width"])</width>`r`n"
    $metadata += "            <height>$($resolution["height"])</height>`r`n"
    $metadata += "        </target>`r`n"
}

$metadata +=
@"
    </targets>
</xml>
"@

$metadata | out-file Metadata.xml -encoding ASCII

Metadata.xml的内容应如下所示:

<xml>
    <targets>
        <target>
            <bitrate>1100</bitrate>
            <width>1920</width>
            <height>1080</height>
        </target>
        <target>
            <bitrate>800</bitrate>
            <width>800</width>
            <height>448</height>
        </target>
        <target>
            <bitrate>400</bitrate>
            <width>800</width>
            <height>448</height>
        </target>
        <target>
            <bitrate>128</bitrate>
            <width>800</width>
            <height>448</height>
        </target>
        <target>
            <bitrate>64</bitrate>
            <width>800</width>
            <height>448</height>
        </target>
    </targets>
</xml>

Answer 1

我将使用单个here字符串:

$metadata = @"
<xml>
    <targets>
$(
    foreach ($resolution in $resolutions)
    {
        "<target>"
            "<bitrate>$($resolution.bitrate)</bitrate>"
            "<width>$($resolution.width)</width>"
            "<height>$($resolution.height)</height>"
        "</target>"
    }
)
    </targets>
</xml>
"@

$metadata | out-file Metadata.xml -encoding ASCII