Question

我仍然在研究this question更好的方法，我决定尝试创建一个可以导出到csv的自定义对象。我有基本的工作，可以提取我需要的信息，但现在我想将具有重复键值的成员组合成一行。我在导出之前尝试对ID字段进行分组，并使用“if”语句查看ID号是否已经存在，如果是，则更新相应的字段，但我似乎无法使其工作。我还需要为每一行添加一笔金额。

$SourceFile = "C:\ACT20131107.TXT"
$objectCollection = ForEach($match in Select-String -path $SourceFile -pattern "242200", "242201") {      

# Convert the match OBJECT to a string for matching
$string = $match.Line

# Set variables
$Amt2 = "{0:n2}" -f 0
$Amt1 =  "{0:n2}" -f 0
$ID = $($string.substring(93,10)).replace("CAR","C")

if ($string -match "242200") {
    $Amt2 = $($string.substring(40,13)).Insert(11,'.')
}
else {
    $Amt1 = $($string.substring(40,13)).Insert(11,'.')
}

$properties = @{ID = $ID;Date = $string.substring(3,8);State = $string.substring(32,2);AmtF = $Amt1;AmtS = $Amt2} 
New-Object -TypeName PSObject -Property $properties                                       
} 

$objectCollection | export-csv "C:\test2.csv" -NoTypeInformation

当前输出：

ID       AmtF           AmtS           Date     State
--       ----           ----           ----     -----
C0044822 0.00           00000000227.82 20131107 MO   
C0010079 0.00           00000000405.41 20131107 NC   
C0027859 00000000848.31 0.00           20131107 FL   
C0010079 00000001291.00 0.00           20131107 MO   
C0044822 00000001351.35 0.00           20131107 NC

期望的输出：

ID       AmtF           AmtS           Date     State
--       ----           ----           ----     -----  
C0027859 00000000848.31 00000000000.00 20131107 FL   
C0010079 00000001291.00 00000000405.41 20131107 MO   
C0044822 00000001351.35 00000000227.82 20131107 NC  
Totals   00000003490.66 00000000633.23

这是我第一次尝试自定义对象，所以任何帮助都会受到赞赏。

Answer 1

我认为你真的很亲密。我有一些我认为可行的方法，但由于我原始格式没有任何样本数据，我无法确定。

这不是最漂亮的解决方案，但我认为它会让你到达你想去的地方，而不用希望破坏你的原始代码。

$SourceFile = "C:\ACT20131107.TXT"
# This hashtable is to store all unique ids and keep a running tally of AmtS and AmtF while you loop through the lines of the original file.
$dataHash = @{}

$objectCollection = ForEach($match in Select-String -path $SourceFile -pattern "242200", "242201") {      

# Convert the match OBJECT to a string for matching
$string = $match.Line

# Set variables
$Amt2 = "{0:n2}" -f 0
$Amt1 =  "{0:n2}" -f 0
$ID = $($string.substring(93,10)).replace("CAR","C")

if ($string -match "242200") {
    $Amt2 = $($string.substring(40,13)).Insert(11,'.')
}
else {
    $Amt1 = $($string.substring(40,13)).Insert(11,'.')
}

# In Powershell, 
if(!$dataHash.ContainsKey($ID))
{
    # This prevents you from trying to reference into a null collection in the next few lines.
    $dataHash[$ID] = @{}
}
# In Powershell, you can reference into a hashtable with a non existant key, and it will be added, and null values are the equivalent of 0 values for basic math ops.
$dataHash[$ID]["State"] = $string.substring(32,2);
$dataHash[$ID]["Date"] = $string.substring(3,8)
$dataHash[$ID]["AmtF"] += $Amt1
$dataHash[$ID]["AmtS"] += $Amt2
}

# Select out custom objects to make summations and csv export easier.
$properties = @(
    @{Name="ID";Expression={$_}},
    @{Name="Date";Expression={$dataHash[$_][Date]}}
    @{Name="AmtF";Expression={$dataHash[$_]["AmtF"]}}
    @{Name="Amts";Expression={$dataHash[$_]["AmtS"]}}
    @{Name="State";Expression={$dataHash[$_]["State"]}}
)
$dataForCsv = $dataHash.Keys | Select $properties

#Time to sum up, then add a custom object to the output data for the totals.
$AmtFTotals = ($dataForCsv | Measure-Object -Properties AmtF -Sum).Sum
$AmtSTotals = ($dataForCsv | Measure-Object -Properties AmtS -Sum).Sum
$dataForCsv += New-Object PSCustomObject @{ID="Totals";AmtF=$AmtFTotals;AmtS=$AmtSTotals;Date=$null;State=$null}
$dataForCsv | export-csv "C:\test2.csv" -NoTypeInformation

在自定义Powershell对象上组合成员

1 个答案: