PS> $empty = $null PS> $empty[0] Error: Cannot index into a null array. 因此,在尝试访问数组中的元素之前,请确保数组不是 $null。Count数组和其他集合具有计数属性,可告知数组中有多少项。PowerShell 复制 PS> $data.count 4 PowerShell 3.0 向大多数对象添加了计数属性。 你可以使用单个对象,它应该...
For Each name As String In processNames '/ The second parameter of this call tells PowerShell to enumerate the '/ array, and send one process at a time to the pipeline. WriteObject(Process.GetProcessesByName(name), True) Next End Sub 'ProcessRecord 代码示例 有关完整的 C# 示...
When no data type is specified, PowerShell creates each array as an object array (System.Object[]). To determine the data type of an array, use the GetType() method. For example:PowerShell Copy $A.GetType() To create a strongly typed array, that is, an array that can contain only...
如果要显示变量的值,直接输入变量的名称,包括美元符号$。 PSC:\WINDOWS\system32>$myStr="This variables defined by user"PSC:\WINDOWS\system32>$myStrThis variables defined by userPSC:\WINDOWS\system32>$myStr="user has changed the value of this variables"PSC:\WINDOWS\system32>$myStruser has chan...
-replace操作符有三种实现方式,其它文本操作符也类似地有三种实现方式,像-replace,-ireplace,-creplace,i前缀表示字符串大小写不敏感(insensitive),c前缀表示字符串大小写敏感(case sensitive)。 #下面的例子没有完成替换,因为当前大小写敏感: “Hello Carl” -creplace “carl”, “eddie” ...
介绍如何使用pwsh命令行接口。 显示命令行参数并介绍语法。 长说明 有关Windows PowerShell 5.1 的命令-line 选项的信息,请参阅about_PowerShell_exe。 语法 复制 Usage: pwsh[.exe] [-Login] [[-File] <filePath> [args]] [-Command { - | [-args <arg-array>] | <string> [<CommandParameters>...
$SqlConn = New-Object System.Data.SqlClient.SqlConnection #使用账号连接MSSQL $SqlConn.ConnectionString = "Data Source=$Server;Initial Catalog=$Database;user id=$UserName;pwd=$Password" #或者以 windows 认证连接 MSSQL #$SqlConn.ConnectionString = "Data Source=$Server;Initial Catalog=$Database;...
But if you need to determine whether a variable is $null, you must put $null on the left-hand side of the equality operator. Putting it on the right-hand side doesn't do what you expect. For example, let $a be an array containing null elements: PowerShell Copy $a = 1, 2...
The value that follows the function name is assigned to the first position in the $args array, $args[0]. The following Get-Extension function adds the .txt filename extension to a filename that you supply: PowerShell Copy function Get-Extension { $name = $args[0] + ".txt" $name ...
Windows 10 应用商店(Windows Store)下载安装即可 PowerShell Core v7.0.1 PowerShell-7.1.0-win-x64.msi 配置Windows Terminal 打开Settings,编辑settings.json,为 PowerShell Core 先生成一个GUID,比如用 Online GUID Generator 在list 中添加一项,如下: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 { ...