if($textFiles=Get-ChildItem*.txt) {$textFiles.Count } 在此示例中,如果没有文件匹配,Get-ChildItem命令不会返回任何内容,并且不会向$textFiles进行任何赋值,这在布尔上下文中被视为$false。 如果将一个或多个FileInfo对象赋值给$textFiles,则条件计算结果为$true。 可以使用$text
token: keyword variable command command-parameter command-argument-token integer-literal real-literal string-literal type-literal operator-or-punctuator B.1.5 关键字 Syntax keyword: one of begin break catch class continue data define do dynamicparam else elseif end exit filter finally for foreach fro...
Check if string contains invalid characters Check if string starts with letter/character. check installed memory with physical memory Check network drive connection Check object property existance check PKI certificate expiration Check string for two special characters back to back Check to see if user ...
In fact, this week we’re going to do something very similar. One seeming-advantage of a graphical-oriented application is that it’s easy to constrain a user to a finite set of choices: if you display a message box that contains onlyYesandNobuttons, well, at that point it’s difficult...
It’s important to note that the Contains method always does a case-sensitive search; if we looked for the stringRIPT, Contains would tell us that this text couldnotbe found. What if we don’t care about letter case, and only care about the actual characters themselves? Well, one way ...
The following table contains the PowerShell cmdlets for the Reporting Services SharePoint shared service. CmdletDescription Install-SPRSServiceInstalls and registers, or uninstalls, the Reporting Services shared service. This action can be done only on the machine that has an installation of SQL Serve...
As of PowerShell 7.2, if the error is from the command line or a script module the output is a single line error message. Otherwise, you receive a multiline error message that contains the error and a pointer to the error showing where it occurs in that line. If the terminal sup...
There might be a delay the first time you execute this because the rules have to load the catalogs into a cache. Each catalog of a PowerShell platform contains details of all the modules and .NET assemblies available to PowerShell on that platform, which can be as many as 1700 commands ...
Check if IIS running on a remote server check if object is $null Check if OS is 32bit or 64bit check If Process Is Running in another computer Check if SMB1 is enabled on the AD servers Check if string contains invalid characters Check if string starts with letter/character. check instal...
If you work with database types, you may get back a[dbnull]::Valuewhich is equivalent to$nullwithin the database, but in PowerShell, this was not equal to$nullso you can’t compare it directly. This change fromJoel Sallowallows you to compare both[dbnull]::Valueand[nullstring]::Valu...