type of file from extension but no filename

19 May 2006 5:41 AM

news.microsoft.com

Hello,

I want to get a list of file types from a big list of extensions.

I know there exists an api call (see below), but it only works when you have
a file name.
SHGetFileInfo(FileName, 0, shinfo, Marshal.SizeOf(shinfo), SHGFI_TYPENAME)
Return shinfo.szTypeName

But this only works when passing an actuual filename (fe:
"C:\WINDOWS\WIN.INI")

When getting the icon from only the extension seems to work:
hImgLarge = SHGetFileInfo(ext, 0, shinfo, Marshal.SizeOf(shinfo),
SHGFI_USEFILEATTRIBUTES Or SHGFI_ICON Or SHGFI_LARGEICON)
Return System.Drawing.Icon.FromHandle(shinfo.hIcon)

Here I can pass the extension only (fe: ".exe")

Is this possible?
Grtz.

19 May 2006 5:08 PM

Mattias Sjögren

Show quote Hide quote

>I want to get a list of file types from a big list of extensions.
>
>I know there exists an api call (see below), but it only works when you have
>a file name.
>SHGetFileInfo(FileName, 0, shinfo, Marshal.SizeOf(shinfo), SHGFI_TYPENAME)
>Return shinfo.szTypeName
>
>But this only works when passing an actuual filename (fe:
>"C:\WINDOWS\WIN.INI")
>
>
>When getting the icon from only the extension seems to work:
>hImgLarge = SHGetFileInfo(ext, 0, shinfo, Marshal.SizeOf(shinfo),
>SHGFI_USEFILEATTRIBUTES Or SHGFI_ICON Or SHGFI_LARGEICON)
>Return System.Drawing.Icon.FromHandle(shinfo.hIcon)
>
>Here I can pass the extension only (fe: ".exe")

The key is to specify SHGFI_USEFILEATTRIBUTES like you did for the
icon. Should work for the file type as well.

Mattias

--
Mattias Sjögren [C# MVP] mattias @ mvps.org
http://www.msjogren.net/dotnet/ | http://www.dotnetinterop.com
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