database-tools

With strong typing, you can limit a variable to only a certain data type such as String: [String]$a = 'Hello' By adding a...

To check for a valid IP-address, use the .NET Framework type System.Net.IPAddress and test whether the data can be converted into this format:...

To check for valid email addresses, you can use the .NET Framework type System.Net.Mail.MailAddress and test whether the data can be converted into...

To exit a function immediately, use the return statement. The next function expects a name (including wildcards) and lists all matching processes....

Want to quickly get a number of interesting details for any drive? Use the .NET System.IO.DriveInfo class like this: New-Object System.io.DriveInfo...

In PowerShell, you can access .NET methods directly so it is easy to add a ping functionality: $object = New-Object...

When writing a function that accepts parameters, you can strongly-type parameters so that an exception occurs when the user submits the wrong...

GUIDs are "Globally Unique Identifiers," which are so random that you can safely assume they are unique worldwide. GUIDs are used whenever...

PowerShell comes with a lot of documentation. It is just sometimes hard to find. For example, to get a list of all available operators, do this:...

In PowerShell, you can initialize multiple variables in just one line. The following line sets all variables to the value 1: $a = $b = $c = $d = 1...

All Get-Cmdlets (cmdlets that start with "Get") have an automatic type accelerator. You can use those cmdlets without the verb. So...

On Vista with UAC enabled, you are not Admin by default. It might be interesting to find out if PowerShell currently has Admin privileges enabled....

Sometimes, you may want to find the next available drive letter for a network drive or enumerate drive letters for other purposes. An easy way to...

Get-Childitem returns both files and folders. If you just want to see folders, use a filter-based on folders that have a property called...

There are numerous ways of finding duplicate files. One approach uses Group-Object and groups your files by LastWriteTime and Length, assuming files...

Group-Object is a very powerful cmdlet as it takes one or more object properties and uses them to group the items. To get a quick overview of just...

Get-Childitem returns all files in a folder. PowerShell returns an array if there are at least two items in a folder. To force PowerShell to always...

The .NET convert class is a great help when you need to convert numbers between different systems. Here's how you can convert a decimal into a...

PowerShell can export results as HTML. Simply pipe the results to ConvertTo-HTML and save the result in a file. When you do that, it is wise to use...

While objects contain a wealth of information, this information sometimes isn't in the right format. Let's take WMI objects representing...

You always get back all instances of a given WMI class when using Get-WMIObject. However, what if you just wanted to get a specific instance? Or you...

You can use WMI to determine how much free space is available on any given disk: Get-WMIObject Win32_LogicalDisk | Foreach-Object { 'Disk {0}...

PowerShell uses the US/English date format when converting user input to DateTime, which can cause unexpected results if using a different culture....

Read-Host is a useful cmdlet to use to ask for user input. However, it returns user input always as generic string. Of course, you can always...

Here is a challenge for you. The following code is a simple currency converter. However, when you run it, you'll notice it doesn't convert...

Every so often, you'll need to filter files by age. Maybe you'll only want to see files that are older than 20 days old and delete them or...

While Get-Date returns the current date and time, it really returns a DateTime object. You can use this object to find out more about the date or to...

Since PowerShell is culture-independent, you can pick any culture you want and use the culture-specific formats. The following script instantiates...

Get-Date provides you with the current date and time. With the -format parameter, you can add style to it. For example, use -format with a lowercase...

You may find that Vista's new Instant Search can sometimes get out of hand and slow down your machine. Temporarily disabling and then stopping...