如果你想让你的脚本更进一步，你可以设置一个哈希表，用于将CSV列与Set-ADUser参数相关联，在左边（哈希表Keys）你可以放置CSV列名称，在右边（哈希表Values）你可以放置参数名称。例如：

$map = @{
    FirstName           = 'GivenName'
    LastName            = 'Surname'
    Department          = 'Department'
    JobTitle            = 'Title'
    Company             = 'Company'
    EmployeeNumber      = 'EmployeeID'
    WorkAddress         = 'StreetAddress'
    City                = 'City'
    State               = 'State'
    Zip                 = 'PostalCode'
    Country             = 'Country'
    Location            = 'Office'
    WorkstationLocation = 'LogonWorkstations'
    EmailAddress        = 'EmailAddress'
}

这个哈希表将位于代码的顶部，在循环之外，然后您可以使用它的键来迭代对象的属性并检查它们的值是否为null或空：

foreach($ADObjectToUpdate in Import-Csv path\to\csv) {
    $setSplat = @{}
    # for each key in our correlation table
    foreach($key in $map.Keys) {
        # here we get the value of each property
        # of the csv
        $value = $ADObjectToUpdate.$key
        # then we can check if its not null or empty
        if([string]::IsNullOrWhiteSpace($value)) {
            # and if its not, we can assign it to the splatting hash
            $setSplat[$map[$key]] = $value
        }
    }

    # unclear how these 2 are obtained but here,
    # you would need an additional condition for them
    if($DescriptionString) {
        $setSplat['Description'] = $DescriptionString
    }

    if($ADManager) {
        $setSplat['Manager'] = $ADManager
    }

    # now you need to be certain that there is something to update
    # for this user, for this, check if the `$setSplat` has something in it
    if($setSplat.Keys.Count) {
        # unclear how `$CurrentADUser` is obtained here
        Set-ADUser -Identity $CurrentADUser @setSplat
    }
}