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Asked: 2026-05-11T02:27:59+00:00

first question here. I’m developing a program in C# (.NET 3.5) that displays files

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first question here. I’m developing a program in C# (.NET 3.5) that displays files in a listview. I’d like to have the ‘large icon’ view display the icon that Windows Explorer uses for that filetype, otherwise I’ll have to use some existing code like this:

        private int getFileTypeIconIndex(string fileName)     {         string fileLocation = Application.StartupPath + '\\Quarantine\\' + fileName;         FileInfo fi = new FileInfo(fileLocation);         switch (fi.Extension)         {             case '.pdf':                 return 1;             case '.doc': case '.docx': case '.docm': case '.dotx':case '.dotm': case '.dot':case '.wpd': case '.wps':                 return 2;             default:                 return 0;         }      }

The above code returns an integer that is used to select an icon from an imagelist that I populated with some common icons. It works fine but I’d need to add every extension under the sun! Is there a better way? Thanks!

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1 Answer

  1. You might find the use of Icon.ExtractAssociatedIcon a much simpler (an managed) approach than using SHGetFileInfo. But watch out: two files with the same extension may have different icons.

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