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c#filterwildcardopenfiledialog

OpenFileDialog - only display filenames that have no extensions

I have the following code in my C# program:

        OpenFileDialog fDialog = new OpenFileDialog();
        fDialog.Title = "Open a file";
        fDialog.Filter =
           "NCF files (*.ncf)|*.ncf|All files (*.*)|*.*|No Extensions (*.)|*.";



I want to be able to have the user pick from the following:

*.NCF (files with .NCF extension only)
**.* (all files)

and files that have no extensions such as:

filewithnoextension



I know ***.* will do this, but it also displays the .NCF, .TXT, and all other files in the same directory.

I just want to be able to display filenames that have no extensions.



Filtering with *. does not do the trick. It works fine when doing it with a DOS window (dir *.) , but C# seems to ignore the *. filter.





Is there a way I can do this with C#?

Thanks.

Solution

  • If the other software program creates these files in the same location, why not have your code add an extension (something innocuous like ".XXX") to every extension-less file in that folder, and then show the dialog?

    Edit: Or, see this MSDN article:

    http://msdn.microsoft.com/en-us/library/ms646960(VS.85).aspx

    From the Filters section:

    The CDN_INCLUDEITEM notification message provides another way to filter the names that the dialog box displays. To use this message, provide an OFNHookProc hook procedure and specify the OFN_ENABLEINCLUDENOTIFY flag in the OPENFILENAME structure when you create the dialog box. Each time the user opens a folder, the dialog box sends a CDN_INCLUDEITEM notification to your hook procedure for each item in the newly opened folder. The return value of the hook procedure indicates whether the dialog box should display the item in the folder's item list.

    Down at the bottom in the Explorer-Style Hook Procedures section, the article explains how to do this. Basically, you pass an event handler to the OpenFile dialog, and each time the user navigates to a new folder, the dialog iterates through all the files in the folder and calls your event handler for each one. Inside the event handler, you would put your code to determine if the file has an extension or not, and return true or false, accordingly.