Question

我正在尝试导入CSV并遍历它，根据一些数学+条件为字段设置一个新值。这是我到目前为止的内容：

import-csv "$folder\test2.csv" | ForEach-Object {
  if ($_.SubmissionID -ne "" -and $_.SubmissionID -ne "SubmissionID"){
    echo $_
    $totaldocs = $_.TotalDocs
    $addnpages = $_.AddnPages
    if ($_.SubmitterName -match "check|Check"){
    echo "YES"
    $_.Cost = ([int]$totaldocs * .09)
    }
    if ($_.SubmitterName -notmatch "check|Check"){
    echo "NO"
    $_.Cost = (([int]$totaldocs + [int]$addnpages) * .05)
    }
    echo $_.Cost
  }
} |
export-csv "$folder\test3.csv" -NoTypeInformation

调试该块，我可以看到正在设置“ Cost”字段，但是，当它导出最终的CSV时，更改不会保留。不仅如此，每行之间还有其他空白行。

有什么我想念的吗？如果有更好的方法，我愿意提出建议。

Answer 1

如果您输入的CSV文件如下所示：

"SubmissionID","SubmitterName","TotalDocs","AddnPages","Cost"
"abcdef", "Check", "12", "3", "5"
"ghijkl", "check", "10", "7", "25"

下面的代码将满足您的要求（如果我正确理解了这个问题）

Import-Csv "$folder\test2.csv" | ForEach-Object {
  if (!([string]::IsNullOrEmpty($_.SubmissionID)) -and $_.SubmissionID -ne "SubmissionID"){
    $totaldocs = $_.TotalDocs
    $addnpages = $_.AddnPages
    if ($_.SubmitterName -match "check") {  # -match is case-insensitive
        $_.Cost = ([int]$totaldocs * .09)
    }
    else {
        $_.Cost = (([int]$totaldocs + [int]$addnpages) * .05)
    }
    ###############################################################
    # output the result. This is what you forgot in the original code
    ###############################################################
    $_
  }
} | Export-Csv "$folder\test3.csv" -NoTypeInformation

输出：

"SubmissionID","SubmitterName","TotalDocs","AddnPages","Cost"
"abcdef","Check","12","3","1.08"
"ghijkl","check","10","7","0.9"

编辑

LotPings的观察很好：

上面的代码将跳过未通过测试的行：

if (!([string]::IsNullOrEmpty($_.SubmissionID)) -and $_.SubmissionID -ne "SubmissionID")

如果您还希望这些行也包含在输出文件中，则将（输出的）$_下移一级。然后，代码变为：

Import-Csv "$folder\test2.csv" | ForEach-Object {
  if (!([string]::IsNullOrEmpty($_.SubmissionID)) -and $_.SubmissionID -ne "SubmissionID"){
    $totaldocs = $_.TotalDocs
    $addnpages = $_.AddnPages
    if ($_.SubmitterName -match "check") {  # -match is case-insensitive
        $_.Cost = ([int]$totaldocs * .09)
    }
    else {
        $_.Cost = (([int]$totaldocs + [int]$addnpages) * .05)
    }
  }
  ###############################################################
  # output the result, changed or not.
  ###############################################################
  $_
} | Export-Csv "$folder\test3.csv" -NoTypeInformation

遍历CSV，根据条件和表达式编辑字段

1 个答案: