Converting to/from WMI Date Time

You will find many posts for how to convert a wmi date-time string to a human-friendly date time here’s one example from Don Jones.

First, here’s an example of the wmi date-time string:

Get-WmiObject -class Win32_OperatingSystem  | select __Server, LastBootUpTime

The value for LastBootUpTime will look something like this: 20120718141700.473048-300. This output is very handy for alpha-sort, by the way…
And Here’s Don’s code:

Get-WmiObject -class Win32_OperatingSystem | Select-Object __SERVER,@{label='LastRestart';expression={$_.ConvertToDateTime($_.LastBootUpTime)}}

Notice how Don elegantly converts the string on the fly with the label and expression arguments.

Now here’s an example of using a COM object to convert the current date time to a wmi date-time string.

$wmidate = new-object -com Wbemscripting.swbemdatetime
$date = get-date -format g

Not nearly as elegant, but it gets the job done. When you create objects in ConfigMgr that require a date-time field, you will usually enter a wmi date-time string.


Happy Scripting!




About Greg Ramsey
Greg Ramsey is a systems engineer specializing in global systems management for Dell IT. He has a B.S. in Computer Sciences and Engineering from the Ohio State University and is a Microsoft Most Valuable Professional (MVP) for Microsoft System Center Configuration Manager. Greg coauthored SMS 2003 Recipes: A Problem-Solution Approach (Apress, 2006), Microsoft System Center Configuration Manager Unleashed (Sams, 2009), Microsoft System Center 2012 Configuration Manager Unleashed (Sams, 2012), and Microsoft System Center 2012 Configuration Manager: Administration Cookbook (Packt Publishing, 2012), and Microsoft System Center 2012 Configuration Manager R2 Unleashed (Sams, 2012). Greg is cofounder of the Ohio SMS Users Group, and the Central Texas Systems Management User Group.

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