我有一個如下的哈希表：
$ProjectType = @{
CSharp = 'FAE04EC0-301F-11D3-BF4B-00C04F79EFBC'
Web_Application = '349C5851-65DF-11DA-9384-00065B846F21'
Windows_Communication_Foundation = '3D9AD99F-2412-4246-B90B-4EAA41C64699'
Windows_Presentation_Foundation = '60DC8134-EBA5-43B8-BCC9-BB4BC16C2548'
Test = '3AC096D0-A1C2-E12C-1390-A8335801FDAB'
Silverlight = 'A1591282-1198-4647-A2B1-27E5FF5F6F3B'
}
我想針對變數 $file 中的內容運行哈希表，如果在 $file 中找到值（guid），則從哈希表中回傳專案型別名稱。
uj5u.com熱心網友回復：
翻轉鍵和值，以便參考 GUID 是鍵：
$ProjectType = @{
'FAE04EC0-301F-11D3-BF4B-00C04F79EFBC' = 'CSharp'
'349C5851-65DF-11DA-9384-00065B846F21' = 'Web_Application'
'3D9AD99F-2412-4246-B90B-4EAA41C64699' = 'Windows_Communication_Foundation'
'60DC8134-EBA5-43B8-BCC9-BB4BC16C2548' = 'Windows_Presentation_Foundation'
'3AC096D0-A1C2-E12C-1390-A8335801FDAB' = 'Test'
'A1591282-1198-4647-A2B1-27E5FF5F6F3B' = 'Silverlight'
}
現在您可以輕松查找任何值：
$file = '3AC096D0-A1C2-E12C-1390-A8335801FDAB'
if($ProjectType.ContainsKey($file)){
Write-Host "Found project type guid for '$($ProjectType[$file])'"
}
uj5u.com熱心網友回復：
您很可能希望顛倒哈希表上鍵和值的順序：
$ProjectType = @{
'FAE04EC0-301F-11D3-BF4B-00C04F79EFBC' = 'CSharp'
'349C5851-65DF-11DA-9384-00065B846F21' = 'Web_Application'
'3D9AD99F-2412-4246-B90B-4EAA41C64699' = 'Windows_Communication_Foundation'
'60DC8134-EBA5-43B8-BCC9-BB4BC16C2548' = 'Windows_Presentation_Foundation'
'3AC096D0-A1C2-E12C-1390-A8335801FDAB' = 'Test'
'A1591282-1198-4647-A2B1-27E5FF5F6F3B' = 'Silverlight'
}
# using this as example
$exampleFile = @'
349C5851-65DF-11DA-9384-00065B846F21
60DC8134-EBA5-43B8-BCC9-BB4BC16C2548
A1591282-1198-4647-A2B1-27E5FF5F6F3B
00000000-1198-4647-A2B1-27E5FF5F6F3B
'@ -split '\r?\n'
foreach($line in $exampleFile)
{
if($val = $ProjectType[$line])
{
"$line => $val"
continue
}
"$line => could not be found on reference table."
}
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