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Shultas
340
How to set the icon of a file in listview without accessing the file
posted

Hello-

 I am using the ultraListView to display a list of files along with some other information. I purchased the Infragistics training and went through the tutorials about how to set the icon of the file in the listview by using SHGetFileInfo and that works great. However, I have one problem. In my application, the file list that I am concerned with is stored in a database. So, the user does not have direct access to the file (the files are in a zip archive on the folder, when the user clicks I am extracting that particular file from the zip on the server (for speed issues over VPN). 

So, my question is, is it possible to get the icon associated with a particular file extension without having direct access to that file and performing that SHGetFileInfo call? 

 

TIA!!

  • 17259
    Offline posted

    Yes, there is. I don't know how you got the file icon, but that's what I did to get the file extension icon:

    public static System.Drawing.Icon GetFileTypeIcon(

    string extension,

    EnumIconSize size,bool addLinkOverlay)

    {

    EnumFileInfoFlags flags =

    EnumFileInfoFlags.ICON | EnumFileInfoFlags.USEFILEATTRIBUTES;

    // add link overlay if requested

    if (addLinkOverlay)

    {

    flags |=     EnumFileInfoFlags.LINKOVERLAY;

    }

    // set size

    if (size == EnumIconSize.Small)

    {

    flags |=     EnumFileInfoFlags.SMALLICON;

    }

    else

    {

    flags |=     EnumFileInfoFlags.LARGEICON;

    }

    string fileType = "*." + extension;ShellFileInfo shellFileInfo = new ShellFileInfo();

    SHGetFileInfo(

    fileType,

    conFILE_ATTRIBUTE_NORMAL,

    ref shellFileInfo,

    (uint)System.Runtime.InteropServices.Marshal.SizeOf(shellFileInfo),

    (uint)flags);

    // deep copy

    System.Drawing.Icon icon =

    (System.Drawing.Icon)System.Drawing.Icon.FromHandle(shellFileInfo.hIcon).Clone();

    // release handle

    DestroyIcon(shellFileInfo.hIcon);

    return icon;

    }