Professional Windows Server 1002003 Security A Technical Reference [Electronic resources]

Displays or modifies file extension associations.

Syntax

assoc [.ext[=[filetype]]]

Options

.ext

Specifies the file extension

filetype

Specifies the file type you want to associate with the specified file extension

Examples

Used without options, assoc displays a list of all current associations:

assoc
.323=h323file
.386=vxdfile
.aca=Agent.Character.2
.acf=Agent.Character.2
.acs=Agent.Character2.2
.aif=AIFFFile
.aifc=AIFFFile
.aiff=AIFFFile
.ani=anifile
.asa=aspfile
.asf=ASFFile
.asp=aspfile
.
.
.
.xml=xmlfile
.xsl=xslfile
.zap=zapfile
.ZFSendToTarget=CLSID\{888DCA60-FC0A-11CF-8F0F-00C04FD7D062}
.zip=CompressedFolder

A better way to do this is to redirect the current list of associations to a text file:

assoc > assoc.txt

and change the association for

.xml files from XML documents (xmlfile) to text documents (txtfile):

assoc .xml=txtfile
.xml=txtfile

Now if you double-click on an XML document, it opens in Notepad instead of Internet Explorer.

Associate the extension

.xxx with XML documents (xmlfile):

assoc .xxx=xmlfile
.xxx=xmlfile

View the newly created association:

assoc .xxx
.xxx=xmlfile

Remove the previously created association for

.xxx files:

assoc .xxx= 
.xxx=

Note there is a space after the equals sign.

Notes

• To view or modify file associations in the GUI, use Windows Explorer:

  Windows Explorer Tools Folder Options File Types

• To view file types with open command strings defined, use ftype instead.

See Also

Files and Folders , ftype