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• Powershell Script To Check If File Contains String
• Powershell Check If File Contains String Java

You want to be able to check and allow only date and time strings that are in a specific date time format pattern. For example, you get a string and want to check if it is in a sortable date and time pattern.

Let us talk about our first case, checking if given string variable contains a number. Look at the below example. The variable $myvar has a value “123”. Though it is a numeric number, PowerShell sees it as a String. Windows PowerShell -Contains. When it comes filtering, or finding data we are spoilt for choice with -Match, -Like and -Contains. While there is overlap, each conditional operator has a distinctive role in PowerShell scripting. I have always wondered about the PowerShell -contains clause. Dorumu netbook drivers for mac. Inspecting an object for something is very important in many IT processes. The ‘natural’ name of this doesn’t seem to fit its use and common sense on how to think about using this. Select-String uses the Pattern parameter to search each file for the string PowerShell. From the PowerShell command line, the $A variable contents are displayed. There's a line that contains two occurrences of the string PowerShell. The $A.Matches property lists the first occurrence of the pattern PowerShell on each line.

Let’s find first how a sortable date and time string looks like. Note that format string is culture dependent:

Instead of using, or having to remember that long pattern, the .NET Framework offers us a composite format string
that is an equivalent of the above, kind of a shortcut pattern, the “s” standard format string. We can format a date and time object to a sortable pattern with the Get-Date cmdlet.

Now, given a date and time string, how you check it complies to a specific pattern?

The DateTime .NET structure has a static method we can use to parse strings and return DateTime objects, the ParseExact method. It converts the specified string representation of a date and time to its DateTime equivalent. If the format of the string does not match a specified format exactly an exception is thrown.

The method accepts three arguments:

Powershell Script To Check If File Contains String

1. s – A string that contains a date and time to convert.
2. format – A format specifier that defines the required format of ‘s’.
3. provider – An object that supplies culture-specific format information about ‘s’.

Wrapping it all into a function so we can reuse it any time we need to.

Powershell Check If File Contains String Java

The function returns True/False if a given string is in the correct format. Add the PassThru switch to get back the parsed date and time object if the pattern was successfully parsed.