public static String RetrieveAssociatedIcon([NotNull] String extensionOrFileOrProtocol, [CanBeNull] out Int32?identifier, out IconIdentifierType identifierType)
{
if (String.IsNullOrWhiteSpace(extensionOrFileOrProtocol))
{
throw new ArgumentNullException(nameof(extensionOrFileOrProtocol));
}
identifier = null;
identifierType = IconIdentifierType.Unknown;
// Special case: The result buffer contains "%1". We treat this case like: "oh hey, your supplied file path is already the file containing the icon!".
var result = SafeNativeMethods.AssocQueryString(extensionOrFileOrProtocol, NativeMethods.ASSOCSTR.ASSOCSTR_DEFAULTICON);
if (result == "%1")
{
return(String.Empty);
}
if (result.IndexOf(',') == -1)
{
identifier = 0;
identifierType = IconIdentifierType.Index;
return(result);
}
Int32 extractedIdentifier;
var file = NativeResourceDescriptor.SplitResourceString(result, out extractedIdentifier);
identifier = extractedIdentifier;
identifierType = IconIdentifier.Identify(extractedIdentifier);
return(file);
}
public Icon ExtractIconResource([NotNull] NativeResourceDescriptor nativeResourceDescriptor)
{
if (nativeResourceDescriptor == null)
{
throw new ArgumentNullException(nameof(nativeResourceDescriptor));
}
return(this.ExtractIconResource(nativeResourceDescriptor, Size.Empty));
}
public Icon ExtractIconResource([NotNull] NativeResourceDescriptor nativeResourceDescriptor, Size desiredSize)
{
if (nativeResourceDescriptor == null)
{
throw new ArgumentNullException(nameof(nativeResourceDescriptor));
}
var resourceId = nativeResourceDescriptor.ResourceId;
return(this.ExtractIconResource(resourceId, desiredSize));
}
public String GetResourceString([NotNull] NativeResourceDescriptor nativeResourceDescriptor)
{
if (nativeResourceDescriptor == null)
{
throw new ArgumentNullException(nameof(nativeResourceDescriptor));
}
var resourceId = nativeResourceDescriptor.ResourceId;
return(this.GetResourceString(resourceId));
}
public static Boolean TryParseFromResourceString(String resourceString,
out NativeResourceDescriptor nativeResourceDescriptor)
{
try
{
nativeResourceDescriptor = NativeResourceDescriptor.ParseFromResourceString(resourceString);
return(true);
}
catch
{
nativeResourceDescriptor = null;
return(false);
}
}
public static NativeResourceDescriptor ParseFromResourceString(String resourceString)
{
try
{
Int32 identifier;
var file = NativeResourceDescriptor.SplitResourceString(resourceString, out identifier);
return(new NativeResourceDescriptor(file, (UInt32)Math.Abs(identifier)));
}
catch (Exception ex)
{
throw new InvalidOperationException($"Cannot parse '{resourceString}' to NativeResourceDescriptor.", ex);
}
}
public IEnumerable <UInt32> EnumerateIconResources(IntPtr resourceType, CancellationToken cancellationToken)
{
var resourceIds = new HashSet <UInt32>();
NativeMethods.EnumResNameProc enumResNameProc = (module, type, value, param) =>
{
if (cancellationToken.IsCancellationRequested)
{
return(false);
}
if (NativeExecutable.IsIntResource(value))
{
resourceIds.Add((UInt32)Math.Abs(value.ToInt32()));
}
else
{
// value is a pointer to a string which represants the name of the resource
var resourceName = Marshal.PtrToStringAnsi(value);
Int32 resourceId;
if (NativeResourceDescriptor.TryParseResourceIdentifier(resourceName, out resourceId))
{
resourceIds.Add((UInt32)Math.Abs(resourceId));
}
}
return(true);
};
var result = NativeMethods.EnumResourceNames(this.Handle, resourceType, enumResNameProc, IntPtr.Zero);
// This happens if the specified file contains no resources of the desired type.
var lastWin32Error = Marshal.GetLastWin32Error();
if (result || lastWin32Error == (Int32)NativeMethods.SystemErrorCode.ERROR_RESOURCE_TYPE_NOT_FOUND || lastWin32Error == (Int32)NativeMethods.SystemErrorCode.ERROR_RESOURCE_ENUM_USER_STOP)
{
return(resourceIds);
}
throw new Win32Exception(lastWin32Error);
}
