如何驗證是否可以使用Powershell執行路徑？

Question

目的是爲了驗證它傳遞到一定Powershell的功能，以避免以下的錯誤之前的參數是否可以執行：

& : The term 'c:\helloworld' is not recognized as the name of a cmdlet, function, script file, or operable program. Check the spelling of the name, or if a path was included, verify that the path is correct and try again. 
At C:\functions\function.ps1:67 char:9 
+  & $createServiceCommand install $serviceName 
+   ~~~~~~~~~~~~~~~~~~~~~ 
    + CategoryInfo   : ObjectNotFound: (c:\helloworld:String) [], CommandNotFoundException 
    + FullyQualifiedErrorId : CommandNotFoundException 

Answer 1

if (get-command helloworld -erroraction silentlycontinue) { 
    "Command was found" 
} 
else { 
    "Command was not found" 
} 

Answer 2

您可以使用測試路徑cmdlet來檢查路徑的存在。