Business Central Docker Dynamics NAV HOW TO Microsoft PowerShell

HOW TO remove docker dangling and unused images

Let us extend the concept of Spring Cleaning to our computers, virtual machines and servers where we are using Docker.

I was starting writing some PowerShell script from the list of the docker images

PS C:\> docker images

and thinking which filters to apply when I thought that maybe docker contains already a command that does some good cleanup.

Here the result of my research, we can use docker image prune, in my case I added also the parameters -a to remove all unused images (all images without at least one container associated to them) and -f that stands for Force to do not prompt for confirmation:

PS C:\> docker image prune -a -f

Note: every docker image related to Microsoft Dynamics NAV or Microsoft Dynamics 365 Business Central takes usually 10-20 GB of space.

If you use navcontainerhelper for the creation of the Docker containers I suggest you to have a look also of the content of the folder under the following path:


You could find old database backup or source file objects downloaded that could be deleted as well.

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C#.NET Google Microsoft VB.NET Visual Studio W3C Windows 7 Windows 8 / 8.1 Windows Server 2008 Windows Server 2012 Windows Vista Windows XP

W3C validator – “there is no attribute “AutoComplete””

When you try to validate your page with W3C Markup Validation Service at the line when you have a TextBox with AutoComplete attribute like this:

<asp:TextBox ID="myTextBox" runat="server" AutoComplete="Off" />

show the following error message:

there is no attribute “AutoComplete”


<asp:TextBox ID="myTextBox" runat="server" AutoCompleteType="None" />

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