Powershell 使用循环一次搜索多个字符串

Question

下面脚本的目的是在特定文件夹中搜索给定的字符串。脚本不会出错。但是结果不正确。

如果搜索是单独完成的，搜索一个字符串就可以了。一旦脚本在循环中运行如果在至少 1 个文件中找到该字符串，我将得到包含该字符串的文件的正确输出。

问题是当代码运行在一个循环中并且字符串没有出现在任何文件中时脚本 returns 一堆字符串不存在的文件。如果我运行单独串起来，我得不到正确的结果。

我设置了 FileOut = $null 以防这个变量只需要在设置之前清除但仍然是同样的问题

$a = Get-Date
write-Host $a

$SearchStrings = Get-Content "C:\Users\Someuser\Desktop\DataDumps_PS\Delete_input_2.txt"

$out_file = "C:\Users\Someuser\Desktop\DataDumps_PS\Delete5_$(get-date -f yyyyMMdd).txt"

$RootString = "E:\SSIS_packages\"

Foreach($SearchString in $SearchStrings){

Write-host $SearchString

$FileOut = $null
                                        
$FileOut = Get-ChildItem $RootString -recurse | Select-String -pattern $SearchString | group 
path | Select-Object name,@{name="SearchString"; expression={ 
$SearchString.replace('[','').replace(']','')} } 

$FileOut | Out-file -width 300 -filepath $out_file -append
}

相同的输出在输出下方循环此字符串“DELETE FROM dbo.PRE_GPS_Upload_Status”returns。哪个是错误的

Name                                                                                  SearchString                          
----                                                                                  ------------                          
E:\SSIS_packages\ENRL_ETL\EWQ_APP\File_Extract_GPS_Fallouts.dtsx                   DELETE FROM  dbo.PRE_GPS_Upload_Status
E:\SSIS_packages\ENRL_ETL\SNP_YearlyVerification\File_Resub_Req_File_Extract.dtsx DELETE FROM  dbo.PRE_GPS_Upload_Status
E:\SSIS_packages\ETL_PNDT\File_GPS_Data_Pull.dtsx                                 DELETE FROM  dbo.PRE_GPS_Upload_Status
E:\SSIS_packages\ETL_PNDT\File_GPS_Data_Pull_06072021.dtsx                        DELETE FROM  dbo.PRE_GPS_Upload_Status
E:\SSIS_packages\ETL_PNDT\File_GPS_Data_Pull_09092019.dtsx                        DELETE FROM  dbo.PRE_GPS_Upload_Status
E:\SSIS_packages\ETL_PNDT\File_GPS_Data_Pull_09232021.dtsx                        DELETE FROM  dbo.PRE_GPS_Upload_Status
E:\SSIS_packages\ETL_PNDT\File_GPS_Data_Pull_11162020.dtsx                        DELETE FROM  dbo.PRE_GPS_Upload_Status
E:\SSIS_packages\ETL_PNDT\Backup\File_GPS_Data_Pull_06.03.2019.dtsx               DELETE FROM  dbo.PRE_GPS_Upload_Status
E:\SSIS_packages\ETL_PNDT\Backup\File_GPS_Data_Pull_4.2.2019.dtsx                 DELETE FROM  dbo.PRE_GPS_Upload_Status
E:\SSIS_packages\ETL_PNDT\Backup_10112019\File_GPS_Data_Pull_10112019.dtsx        DELETE FROM  dbo.PRE_GPS_Upload_Status

示例输出仅搜索 1 个字符串（这是正确的输出）

Name                                                                                  SearchString                          
----                                                                                  ------------

对这种行为有什么想法吗？

Answer 1

你的 Select-String -pattern $SearchString 很可能是罪魁祸首。因为 -pattern 使用 regular expressions 进行匹配，它可能会看到那些大括号 [ ]，并匹配文件中的某些内容。尝试将 -pattern 换成 -SimpleMatch。

Powershell 使用循环一次搜索多个字符串

Powershell searching many strings at once with a loop

powershell

powershell-5.1