public static System.Drawing.Icon GetFileIconFromExtension(String _extension, IconSize _size)
{
String iconLocation = String.Empty;
// Add the '.' to the extension if needed
if (_extension[0] != '.')
{
_extension = String.Format(".{0}", _extension);
}
//opens the registry for the wanted key.
RegistryKey registryKeyRoot = Registry.ClassesRoot;
RegistryKey registryKeyFileType = registryKeyRoot.OpenSubKey(_extension);
if (registryKeyFileType == null)
{
return(IconManager.GetUnkownFileTypeIcon(_size));
}
//Gets the default value of this key that contains the information of file type.
Object defaultValue = registryKeyFileType.GetValue("");
if (defaultValue == null)
{
return(IconManager.GetUnkownFileTypeIcon(_size));
}
//Go to the key that specifies the default icon associates with this file type.
String defaultIcon = String.Format("{0}\\DefaultIcon", defaultValue.ToString());
RegistryKey registryKeyFileIcon = registryKeyRoot.OpenSubKey(defaultIcon);
if (registryKeyFileIcon != null)
{
//Get the file contains the icon and the index of the icon in that file.
Object value = registryKeyFileIcon.GetValue("");
if (value != null)
{
// Clear all unnecessary " sign in the string to avoid error.
iconLocation = value.ToString().Replace("\"", "");
}
registryKeyFileIcon.Close();
}
else
{
return(IconManager.GetUnkownFileTypeIcon(_size));
}
registryKeyFileType.Close();
registryKeyRoot.Close();
String[] iconPath = iconLocation.Split(',');
IntPtr[] large = null;
IntPtr[] small = null;
int iIconPathNumber = 0;
if (iconPath.Length > 1)
{
iIconPathNumber = 1;
}
else
{
iIconPathNumber = 0;
}
if (iconPath[iIconPathNumber] == null)
{
iconPath[iIconPathNumber] = "0";
}
large = new IntPtr[1];
small = new IntPtr[1];
//extracts the icon from the file.
if (iIconPathNumber > 0)
{
API.ExtractIconEx(iconPath[0], Convert.ToInt16(iconPath[iIconPathNumber]), large, small, 1);
}
else
{
API.ExtractIconEx(iconPath[0], Convert.ToInt16(0), large, small, 1);
}
System.Drawing.Icon icon = null;
try
{
switch (_size)
{
case IconSize.Small:
icon = System.Drawing.Icon.FromHandle(small[0]);
break;
case IconSize.Large:
icon = System.Drawing.Icon.FromHandle(large[0]);
break;
}
}
catch (Exception)
{
return(IconManager.GetUnkownFileTypeIcon(_size));
}
return(icon);
}
/// <summary>
/// Generates the ImageSource which is used for folders
/// </summary>
/// <param name="_iconSize">The size of the icon</param>
/// <param name="_folderType">The type of the folder icon</param>
/// <returns>Retunrs the ImageSource of the folder icon</returns>
private static ImageSource GetFolderImageSource(IconSize _iconSize, FolderType _folderType)
{
System.Drawing.Icon icon = IconManager.GetFolderIcon(_iconSize, _folderType);
return(ShellIcon.toImageSource(icon));
}
public static ImageSource GetFileImageSourceFromExtension(String _extension, IconSize _size)
{
System.Drawing.Icon icon = IconManager.GetFileIconFromExtension(_extension, _size);
return(ShellIcon.toImageSource(icon));
}