3. The PowerShell Not Equal operator is not case-sensitive. As you can see in the previous step, “Hello” is equal to “hello”. But if you require case sensitivity when comparing string values, substitute the
-ge, -ige, -cge - greater than or equal -lt, -ilt, -clt - less than -le, -ile, -cle - less than or equal Matching -like, -ilike, -clike - string matches wildcard pattern -notlike, -inotlike, -cnotlike - string doesn't match wildcard pattern -match, -imatch, -cmatch ...
= Not equal <> Not equal < Less than > Greater than <= Less than or equal >= Greater than or equal LIKE Wildcard match IS Evaluates null ISNOT Evaluates not null ISA Evaluates a member of a WMI class 还有其他运算符,但这些运算符用于进行比较。 例如,以下查询从 Win32_Process 类中进程...
所在位置行:1字符:13+MyScript.ps1<<<+CategoryInfo:ObjectNotFound:(MyScript.ps1:String)[],CommandNotFoundException+FullyQualifiedErrorId:CommandNotFoundExceptionSuggestion[3,General]:未找到命令MyScript.ps1,但它确实存在于当前位置。WindowsPowerShell默认情况下不从当前位置加载命令。如果信任此命令,请改为键入...
Optionally, you can provide a brief help string that describes the default value of your parameter, by adding thePSDefaultValueattribute to the description of your parameter, and specifying theHelpproperty ofPSDefaultValue. To provide a help string that describes the default value (100) of theSize...
Use comparison operators (-eq,-ne,-gt,-lt,-le,-ge) to compare values and test conditions. For example, you can compare two string values to determine whether they're equal. The comparison operators also include operators that find or replace patterns in text. The (-match,-notmatch,-repla...
string to System.Management.Automation.ScriptBlock Cannot use Set-Acl properly despite being file owner and being a member of Administrators Group. Cannot validate argument on parameter 'Name'. The argument is null or empty. Provide an argument that is not null or empty, and then try the ...
Although this parameter is a string (not a system block), you can also use braces { }, but only if the filter doesn't contain variables. Property is a filterable property. ComparisonOperator is an OPATH comparison operator (for example -eq for equals and -like for string comparison). For...
for the user to select an option and press ENTER. When that happens the user’s selection is stored in a variable named $result. (Actually, what gets stored is the index number of the option selected. In this case, $result will equal 0 if the user picksYesand 1 if the user picksNo...
If you work with database types, you may get back a[dbnull]::Valuewhich is equivalent to$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...