删除变量 如果不想继续使用自定义的变量,可以使用del variable:变量名的方法删除变量,注意此处无$符号 $a=0$a-eq$nullFalsedelvariable:a$a-eq$nullTrue PowerShell支持的变量类型和C#大体相同(没有了short、uint、ulong等),大多都继承自System.ValueType类( .NET类),其基本数据类型包括 整型 其实int、long、以...
about Quoting Rules - PowerShell | Microsoft Docs Everything you wanted to know about variable substitution in strings - PowerShell | Microsoft Docs 2Variable substitution 2Command substitution 3Command execution 2Format...
Here-strings此處字串的引號規則稍有不同。here-string 是以單引號或雙引弧括住的字串, @ () 。 此處字串內的引號會以常值方式解譯。here-string:跨越多行 開頭標記後面接著換行符 結尾為換行符,後面接著結尾標記 在單一字串中,包含開頭和結尾標記之間的每一行如同一般字串,變數會以雙引號此處字串取代其值...
{n,m}至少n,但不超过m次。 星号(*)与上一个元素零次或多次匹配。 结果是,即使没有元素的输入字符串也是匹配项。 PowerShell # This returns true for all account name strings even if the name is absent.'ACCOUNT NAME: Administrator'-match'ACCOUNT NAME:\s*\w*' ...
When the input is a collection of values, each item in the collection is converted to a string for comparison. The -match and -notmatch operators return any matching and non-matching members respectively. However, the -like and -notlike operators return the members as strings. The strin...
ErrorVariable(ev) InformationAction(infa) InformationVariable(iv) OutVariable(ov) OutBuffer(ob) PipelineVariable(pv) ProgressAction(proga) Verbose(vb) WarningAction(wa) WarningVariable(wv) Action参数是ActionPreference类型值。ActionPreference是具有以下值的枚举: ...
This example stores a command in a string and executes it using the call operator. PowerShell PS>$c="Get-ExecutionPolicy"PS>$cGet-ExecutionPolicyPS> &$cAllSigned The call operator doesn't parse strings. This means that you can't use command parameters within a string when you use the call...
Wenn eine Variable gefunden wird, wird der eigentliche Wert der Variablen durch den Variablennamen ersetzt. Folglich können Sie sehen, dass der aktuelle Dienstname angezeigt wird, wenn dieser Code ausgeführt wird.Dies ist jedoch noch kein Skript....
This command uses an array of character strings as input to the Variable parameter. The array defines multiple SQLCMD variables. The $ signs in the SELECT statement that identify the SQLCMD variables are escaped using the back-tick (`) character. Example 4: Invoke a script and pass in varia...
The Select-String cmdlet works in conjunction with other cmdlets to do jobs, such as highlighting patterns found in files. PowerShell highlighted the matching strings, which helps make specific text stand out when you must sift through a large amount of output data. ...