private static string GetSystemSound(string soundName)
{
string path = null;
string name = InvariantString.Format(@"AppEvents\Schemes\Apps\.Default\{0}\.current\", soundName);
PermissionSet set = new PermissionSet(null);
set.AddPermission(new RegistryPermission(RegistryPermissionAccess.Read, @"HKEY_CURRENT_USER\AppEvents\Schemes\Apps\.Default\"));
set.AddPermission(new EnvironmentPermission(PermissionState.Unrestricted));
set.Assert();
try
{
using (RegistryKey key = Registry.CurrentUser.OpenSubKey(name))
{
if (key != null)
{
path = (string)key.GetValue("");
}
return(path);
}
}
finally
{
CodeAccessPermission.RevertAssert();
}
}
/// <summary>
/// Attempts to convert a specified object to an instance of <see cref="T:System.Windows.Media.ImageSource" />.
/// </summary>
/// <param name="context">Type context information used for conversion.</param>
/// <param name="culture">Cultural information that is respected during conversion.</param>
/// <param name="value">The object being converted.</param>
/// <returns>
/// A new instance of <see cref="T:System.Windows.Media.ImageSource" />.
/// </returns>
/// <exception cref="T:System.NotSupportedException">
/// <paramref name="value" /> is null or is an invalid type.
/// </exception>
public override object ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, object value)
{
if (value == null)
{
throw GetConvertFromException(null);
}
TaskDialogIcon icon;
if (value is TaskDialogIcon)
{
icon = (TaskDialogIcon)value;
}
else
{
if (!Enum.TryParse(value as string, true, out icon))
{
return(null);
}
}
if (icon == TaskDialogIcon.None)
{
return(null);
}
value = InvariantString.Format(_iconUriScheme, value);
return(base.ConvertFrom(context, culture, value));
}
static TaskDialogIconConverter()
{
string assemblyName = typeof(TaskDialog).Assembly.FullName;
assemblyName = assemblyName.Substring(0, assemblyName.IndexOf(','));
_iconUriScheme = InvariantString.Format("pack://application:,,,/{0};component/Images/{{0}}.ico", assemblyName);
}
/// <summary>
/// Returns the <see cref="Type" /> value as evaluated for the requested type name and type arguments.
/// </summary>
/// <param name="serviceProvider">Object that can provide services for the markup extension.</param>
/// <returns>
/// The object value to set on the property where the extension is applied.
/// </returns>
public override object ProvideValue(IServiceProvider serviceProvider)
{
if (_closedType == null)
{
if (_typeName == null && _type == null)
{
throw new InvalidOperationException(SR.TypeExtension_TypeOrNameMissing);
}
Type type = _type;
Type[] typeArguments = _typeArguments.TakeWhile(t => t != null).ToArray();
if (type == null)
{
// resolve using type name
// ReSharper disable once ConditionIsAlwaysTrueOrFalse
IXamlTypeResolver typeResolver = serviceProvider != null
? serviceProvider.GetService(typeof(IXamlTypeResolver)) as IXamlTypeResolver
: null;
if (typeResolver == null)
{
throw new InvalidOperationException(SR.TypeExtension_NoIXamlTypeResolver);
}
// check that the number of generic arguments match
string typeName = TypeName;
if (typeArguments.Length > 0)
{
int genericsMarkerIndex = typeName.LastIndexOf('`');
if (genericsMarkerIndex < 0)
{
typeName = InvariantString.Format("{0}`{1}", typeName, typeArguments.Length);
}
else
{
bool validArgumentCount = false;
if (genericsMarkerIndex < typeName.Length)
{
int typeArgumentCount;
if (int.TryParse(typeName.Substring(genericsMarkerIndex + 1), out typeArgumentCount))
{
validArgumentCount = true;
}
}
if (!validArgumentCount)
{
throw new InvalidOperationException(SR.TypeExtension_InvalidTypeNameArgumentCount);
}
}
}
type = typeResolver.Resolve(typeName);
if (type == null)
{
throw new InvalidOperationException(SR.TypeExtension_InvalidTypeName);
}
}
else if (type.IsGenericTypeDefinition && type.GetGenericArguments().Length != typeArguments.Length)
{
throw new InvalidOperationException(SR.TypeExtension_InvalidTypeArgumentCount);
}
// build closed type
if (typeArguments.Length > 0 && type.IsGenericTypeDefinition)
{
_closedType = type.MakeGenericType(typeArguments);
}
else
{
_closedType = type;
}
}
return(_closedType);
}
/// <summary>
/// Returns a <see cref="T:System.String" /> that represents the current <see cref="T:System.Object" />.
/// </summary>
/// <returns>
/// A <see cref="T:System.String" /> that represents the current <see cref="T:System.Object" />.
/// </returns>
public override string ToString()
{
return(InvariantString.Format("Header={0}, Content={1}", Header, Content));
}
