/// <summary>
/// Returns an icon for a given file - indicated by the name parameter</summary>
/// <param name="name">Pathname for file</param>
/// <param name="size">Large or small icon</param>
/// <param name="linkOverlay">Whether to include the link icon</param>
/// <returns>Icon</returns>
public static Icon GetFileIcon(string name, IconSize size, bool linkOverlay)
{
Shell32.SHFILEINFO shfi = new Shell32.SHFILEINFO();
uint flags = Shell32.SHGFI_ICON | Shell32.SHGFI_USEFILEATTRIBUTES;
if (linkOverlay) flags += Shell32.SHGFI_LINKOVERLAY;
// Check the size specified for return.
if (IconSize.Small == size)
{
flags += Shell32.SHGFI_SMALLICON;
}
else
{
flags += Shell32.SHGFI_LARGEICON;
}
Shell32.SHGetFileInfo(name,
Shell32.FILE_ATTRIBUTE_NORMAL,
ref shfi,
(uint)System.Runtime.InteropServices.Marshal.SizeOf(shfi),
flags);
// Copy (clone) the returned icon to a new object, thus allowing us to clean-up properly
Icon icon = (Icon)Icon.FromHandle(shfi.hIcon).Clone();
User32.DestroyIcon(shfi.hIcon); // Cleanup
return icon;
}
public void TestSHGetFileInfo()
{
var shellFileInfo = new Shell32.SHFILEINFO();
var cbFileInfo = (uint)Marshal.SizeOf(shellFileInfo);
Shell32.SHGetFileInfo(".", Shell32.FILE_ATTRIBUTE_DIRECTORY, ref shellFileInfo,
cbFileInfo, Shell32.SHGFI_DISPLAYNAME);
Assert.AreEqual("tests", shellFileInfo.szDisplayName);
}
/// <summary>
/// Obtains system folder icon</summary>
/// <param name="size">Specifies large or small icons</param>
/// <param name="folderType">Specifies open or closed FolderType</param>
/// <returns>System folder icon</returns>
public static Icon GetFolderIcon(IconSize size, FolderType folderType)
{
// Need to add size check, although errors generated at present!
uint flags = Shell32.SHGFI_ICON | Shell32.SHGFI_USEFILEATTRIBUTES;
if (FolderType.Open == folderType)
{
flags += Shell32.SHGFI_OPENICON;
}
if (IconSize.Small == size)
{
flags += Shell32.SHGFI_SMALLICON;
}
else
{
flags += Shell32.SHGFI_LARGEICON;
}
// Get the folder icon
Shell32.SHFILEINFO shfi = new Shell32.SHFILEINFO();
// Flag SHGFI_USEFILEATTRIBUTES prevents SHGetFileInfo() from attempting
// to access the path specified by the first argument. However, passing
// some sort of non-null string is still required, or the call will fail.
Shell32.SHGetFileInfo("C:\\Windows",
Shell32.FILE_ATTRIBUTE_DIRECTORY,
ref shfi,
(uint)System.Runtime.InteropServices.Marshal.SizeOf(shfi),
flags);
Icon.FromHandle(shfi.hIcon); // Load the icon from an HICON handle
// Now clone the icon, so that it can be successfully stored in an ImageList
Icon icon = (Icon)Icon.FromHandle(shfi.hIcon).Clone();
User32.DestroyIcon(shfi.hIcon); // Cleanup
return(icon);
}
/// <summary>
/// Obtains system folder icon</summary>
/// <param name="size">Specifies large or small icons</param>
/// <param name="folderType">Specifies open or closed FolderType</param>
/// <returns>System folder icon</returns>
public static Icon GetFolderIcon(IconSize size, FolderType folderType)
{
// Need to add size check, although errors generated at present!
uint flags = Shell32.SHGFI_ICON | Shell32.SHGFI_USEFILEATTRIBUTES;
if (FolderType.Open == folderType)
{
flags += Shell32.SHGFI_OPENICON;
}
if (IconSize.Small == size)
{
flags += Shell32.SHGFI_SMALLICON;
}
else
{
flags += Shell32.SHGFI_LARGEICON;
}
// Get the folder icon
Shell32.SHFILEINFO shfi = new Shell32.SHFILEINFO();
// Flag SHGFI_USEFILEATTRIBUTES prevents SHGetFileInfo() from attempting
// to access the path specified by the first argument. However, passing
// some sort of non-null string is still required, or the call will fail.
Shell32.SHGetFileInfo("C:\\Windows",
Shell32.FILE_ATTRIBUTE_DIRECTORY,
ref shfi,
(uint)System.Runtime.InteropServices.Marshal.SizeOf(shfi),
flags);
Icon.FromHandle(shfi.hIcon); // Load the icon from an HICON handle
// Now clone the icon, so that it can be successfully stored in an ImageList
Icon icon = (Icon)Icon.FromHandle(shfi.hIcon).Clone();
User32.DestroyIcon(shfi.hIcon); // Cleanup
return icon;
}
/// <summary>
/// Obtains system folder icon</summary>
/// <param name="size">Specifies large or small icons</param>
/// <param name="folderType">Specifies open or closed FolderType</param>
/// <returns>System folder icon</returns>
public static Icon GetFolderIcon(IconSize size, FolderType folderType)
{
// Need to add size check, although errors generated at present!
uint flags = Shell32.SHGFI_ICON | Shell32.SHGFI_USEFILEATTRIBUTES;
if (FolderType.Open == folderType)
{
flags += Shell32.SHGFI_OPENICON;
}
if (IconSize.Small == size)
{
flags += Shell32.SHGFI_SMALLICON;
}
else
{
flags += Shell32.SHGFI_LARGEICON;
}
// Get the folder icon
Shell32.SHFILEINFO shfi = new Shell32.SHFILEINFO();
Shell32.SHGetFileInfo(null,
Shell32.FILE_ATTRIBUTE_DIRECTORY,
ref shfi,
(uint)System.Runtime.InteropServices.Marshal.SizeOf(shfi),
flags);
Icon.FromHandle(shfi.hIcon); // Load the icon from an HICON handle
// Now clone the icon, so that it can be successfully stored in an ImageList
Icon icon = (Icon)Icon.FromHandle(shfi.hIcon).Clone();
User32.DestroyIcon(shfi.hIcon); // Cleanup
return icon;
}
