使用 System.Web.HttpUtilityUrlEncode() 编码查询字符串

$scheme = 'https'
$url_format = '{0}://example.vertigion.com/foos?{1}'
$qs_data = @{
    'foo1'='bar1';
    'foo2'= 'complex;/?:@&=+$, bar''"';
    'complex;/?:@&=+$, foo''"'='bar2';
}

[System.Collections.ArrayList] $qs_array = @()
foreach ($qs in $qs_data.GetEnumerator()) {
    $qs_key = [System.Web.HttpUtility]::UrlEncode($qs.Name)
    $qs_value = [System.Web.HttpUtility]::UrlEncode($qs.Value)
    $qs_array.Add("${qs_key}=${qs_value}") | Out-Null
}

$url = $url_format -f @([uri]::"UriScheme${scheme}", ($qs_array -join '&'))

使用 [System.Web.HttpUtility]::UrlEncode()，你会注意到空格变成了加号（+）而不是%20：

https://example.vertigion.com/foos ？foo2 =复合％3b％2f％3f％3a％40％26％3d％2b％24％2c + bar％27％22＆复合％3b％2f％3f％3a％40％26％3d％2b％24％2c + FOO％27％22 = BAR2＆foo1 = BAR1