private static Image TryExtractImageFromShellLink(string fileName)
{
Bitmap result = null;
string targetName = FileOperations.ExtractFileNameFromShellLink(fileName);
if (!string.IsNullOrEmpty(targetName))
{
//link uses original target icon
if (FileOperations.FileIsExe(targetName))
{
result = (Bitmap)ExtractIconFromExecutable(targetName);
}
}
return(result);
}
/// <summary>
/// Get the image for the specified file type.
/// You can provide the full file name, for example doc1.docx
/// </summary>
/// <param name="fileName">Name of the file.</param>
/// <returns>Image or null. The size of the image = size of the icon</returns>
private static Image FileTypeImage(string fileName)
{
Image result = null;
Icon icon = null;
IconFlags flags;
IntPtr hIcon = IntPtr.Zero;
IntPtr shellInfo;
IconSize size;
IImageList iImageList = null;
if (!string.IsNullOrEmpty(fileName))
{
SHFILEINFO fileInfo = new SHFILEINFO();
fileName = FileSearch.FullPath(fileName);
if (FileOperations.FileOrFolderExists(fileName))
{
fileInfo.dwAttributes = (uint)File.GetAttributes(fileName);
}
//first try to query the icon location and get the icon from there
flags = IconFlags.LargeIcon | IconFlags.IconLocation | IconFlags.UseFileAttributes;
shellInfo = NativeMethods.SHGetFileInfo(fileName, 0, ref fileInfo, (uint)Marshal.SizeOf(fileInfo), flags);
if (shellInfo == (IntPtr)1)
{
//we have the result, try to parse it
if (FileOperations.FileIsIcon(fileInfo.szDisplayName))
{
icon = new Icon(fileInfo.szDisplayName);
result = ConvertIconToBitmap(icon);
icon.Dispose();
return(result);
}
else
if (FileOperations.FileIsExe(fileName))
{
result = ExtractIconFromExecutable(fileInfo.szDisplayName, (int)fileInfo.iIcon);
}
}
if (result != null)
{
return(result);
}
//if we have no result: continue to search using system image list
flags = IconFlags.LargeIcon | IconFlags.SysIconIndex;
if (!FileOperations.FileOrFolderExists(fileName))
{
flags = flags | IconFlags.UseFileAttributes;
}
shellInfo = NativeMethods.SHGetFileInfo(fileName, 0, ref fileInfo, (uint)Marshal.SizeOf(fileInfo), flags);
if (shellInfo == IntPtr.Zero)
{
return(null);
}
size = IconSize.ExtraLarge;
if (InteropHelper.RunningOnXP)
{
Guid iidImageList = new Guid("46EB5926-582E-4017-9FDF-E8998DAA0950");
NativeMethods.SHGetImageList(
(int)size,
ref iidImageList,
ref iImageList
);
// the image list handle is the IUnknown pointer, but
// using Marshal.GetIUnknownForObject doesn't return
// the right value. It really doesn't hurt to make
// a second call to get the handle:
NativeMethods.SHGetImageListHandle((int)size, ref iidImageList, ref shellInfo);
}
if (iImageList == null)
{
hIcon = NativeMethods.ImageList_GetIcon(shellInfo, (int)fileInfo.iIcon, NativeMethods.ILD_TRANSPARENT);
}
else
{
iImageList.GetIcon((int)fileInfo.iIcon, (int)NativeMethods.ILD_TRANSPARENT, ref hIcon);
}
if (hIcon == IntPtr.Zero)
{
return(null);
}
icon = Icon.FromHandle(hIcon);
//do not destroy icon from the system image list
//NativeMethods.DestroyIcon(hIcon);
result = ConvertIconToBitmap(icon);
}
if (icon != null)
{
icon.Dispose();
}
if (result != null)
{
result = BitmapPainter.ResizeBitmap(result, imageSize, imageSize, true);
}
return(result);
}
private static Image FileNameImageInternal(string fileName)
{
Image result = null;
Icon icon = null;
if (!string.IsNullOrEmpty(fileName))
{
fileName = FileOperations.StripFileName(fileName);
//if we have only name of the file without path
//try to find it in the search path of Windows
fileName = FileSearch.FullPath(fileName);
if (!FileOperations.FileOrFolderExists(fileName))
{
result = FileTypeImage(fileName);
return(result);
}
//if this is a link to executable with original
//executable icon
if (FileOperations.FileIsLink(fileName))
{
result = TryExtractImageFromShellLink(fileName);
if (result != null)
{
return(result);
}
}
if (FileOperations.FileIsImage(fileName))
{
try
{
result = Image.FromFile(fileName);
result = BitmapPainter.ResizeBitmap(result, imageSize, imageSize, true);
}
catch
{
result = null;
}
if (result != null)
{
return(result);
}
}
// 1. The file is icon
// 2. The file is exe or dll
// 3. The file is a shell link .lnk
// 4. Other file types
if (FileOperations.FileIsIcon(fileName))
{
//Simply load icon from file
icon = new Icon(fileName);
}
else
//Extract icon from exe or dll directly
if (FileOperations.FileIsExe(fileName))
{
return(ExtractIconFromExecutable(fileName));
}
else
{
result = FileTypeImage(fileName);
return(result);
}
result = ConvertIconToBitmap(icon);
}
if (icon != null)
{
icon.Dispose();
}
return(result);
}