/// <summary>
/// Return the index of the image that has the Shell Icon for the given file/directory.
/// </summary>
/// <param name="path">The full path to the file/directory</param>
/// <returns>The index of the image or -1 if something goes wrong.</returns>
public int GetImageIndex(string path)
{
if (System.IO.Directory.Exists(path))
{
path = System.Environment.SystemDirectory; // optimization! give all directories the same image
}
else
if (System.IO.Path.HasExtension(path))
{
path = System.IO.Path.GetExtension(path);
}
if (this.SmallImageCollection.ContainsKey(path))
{
return(this.SmallImageCollection.IndexOfKey(path));
}
try {
this.SmallImageCollection.Add(path, ShellUtilities.GetFileIcon(path, true, true));
if (this.LargeImageCollection != null)
{
this.LargeImageCollection.Add(path, ShellUtilities.GetFileIcon(path, false, true));
}
} catch (ArgumentNullException) {
return(-1);
}
return(this.SmallImageCollection.IndexOfKey(path));
}
/// <summary>
/// Return the index into the system image list of the image that represents the given file.
/// </summary>
/// <param name="path">The full path to the file or directory whose icon is required</param>
/// <returns>The index of the icon, or -1 if something goes wrong</returns>
/// <remarks>This is only useful if you are using the system image lists directly. Since there is
/// no way to do that in .NET, it isn't a very useful.</remarks>
public static int GetSysImageIndex(string path)
{
SHFILEINFO shfi = new SHFILEINFO();
int flags = SHGFI_ICON | SHGFI_SYSICONINDEX;
IntPtr result = ShellUtilities.SHGetFileInfo(path, 0, out shfi, Marshal.SizeOf(shfi), flags);
if (result.ToInt32() == 0)
{
return(-1);
}
else
{
return(shfi.iIcon);
}
}
/// <summary>
/// Get the string that describes the file's type.
/// </summary>
/// <param name="path">The file or directory whose type is to be fetched</param>
/// <returns>A string describing the type of the file, or an empty string if something goes wrong.</returns>
public static String GetFileType(string path)
{
SHFILEINFO shfi = new SHFILEINFO();
int flags = SHGFI_TYPENAME;
IntPtr result = ShellUtilities.SHGetFileInfo(path, 0, out shfi, Marshal.SizeOf(shfi), flags);
if (result.ToInt32() == 0)
{
return(String.Empty);
}
else
{
return(shfi.szTypeName);
}
}
/// <summary>
/// Return the icon for the given file/directory.
/// </summary>
/// <param name="path">The full path to the file whose icon is to be returned</param>
/// <param name="isSmallImage">True if the small (16x16) icon is required, otherwise the 32x32 icon will be returned</param>
/// <param name="useFileType">If this is true, only the file extension will be considered</param>
/// <returns>The icon of the given file, or null if something goes wrong</returns>
public static Icon GetFileIcon(string path, bool isSmallImage, bool useFileType)
{
int flags = SHGFI_ICON;
if (isSmallImage)
{
flags |= SHGFI_SMALLICON;
}
int fileAttributes = 0;
if (useFileType)
{
flags |= SHGFI_USEFILEATTRIBUTES;
if (System.IO.Directory.Exists(path))
{
fileAttributes = FILE_ATTRIBUTE_DIRECTORY;
}
else
{
fileAttributes = FILE_ATTRIBUTE_NORMAL;
}
}
SHFILEINFO shfi = new SHFILEINFO();
IntPtr result = ShellUtilities.SHGetFileInfo(path, fileAttributes, out shfi, Marshal.SizeOf(shfi), flags);
if (result.ToInt32() == 0)
{
return(null);
}
else
{
return(Icon.FromHandle(shfi.hIcon));
}
}
/// <summary>
/// Execute the given operation on the file or directory identified by the given path.
/// Example operations are "edit", "print", "explore".
/// </summary>
/// <param name="path">The file or directory to be operated on</param>
/// <param name="operation">What operation should be performed</param>
/// <returns>Values < 31 indicate some sort of error. See ShellExecute() documentation for specifics.</returns>
public static int Execute(string path, string operation)
{
IntPtr result = ShellUtilities.ShellExecute(0, operation, path, "", "", SW_SHOWNORMAL);
return(result.ToInt32());
}
/// <summary>
/// Execute the default verb on the file or directory identified by the given path.
/// For documents, this will open them with their normal application. For executables,
/// this will cause them to run.
/// </summary>
/// <param name="path">The file or directory to be executed</param>
/// <returns>Values < 31 indicate some sort of error. See ShellExecute() documentation for specifics.</returns>
/// <remarks>The same effect can be achieved by <code>System.Diagnostics.Process.Start(path)</code>.</remarks>
public static int Execute(string path)
{
return(ShellUtilities.Execute(path, ""));
}