/// <summary>
/// 設定情報（<see cref="Properties.Settings"/>）から、
/// 引数のプロパティの名称（<paramref name="propertyName"/>）に該当する
/// プロパティのデフォルト値を取得する
/// </summary>
/// <param name="propertyName">プロパティの名称</param>
/// <exception cref="ArgumentNullException">
/// 引数のプロパティの名称（<paramref name="propertyName"/>）がNULLの場合に発生
/// </exception>
/// <exception cref="SettingException">
/// 引数で指定された名称のプロパティが設定情報（<see cref="Properties.Settings"/>）に存在しない、
/// または デフォルト値属性が存在しない場合に発生
/// </exception>
/// <returns>
/// 引数のプロパティの名称（<paramref name="propertyName"/>）に該当する
/// 設定情報（<see cref="Properties.Settings"/>）で定義されたプロパティのデフォルト値
/// </returns>
private static string GetSettingPropertyDefaultValue(string propertyName)
{
// NULLチェック
if (propertyName == null)
{
throw new ArgumentNullException(nameof(propertyName));
}
// 対象のプロパティの属性情報を取得する
AttributeCollection attributes = GetSettingProperty(propertyName).Attributes;
// 取得した属性除法情報からデフォルト値属性を取得
DefaultSettingValueAttribute defaultValueAttribute
= attributes == null
? null
: attributes[typeof(DefaultSettingValueAttribute)] as DefaultSettingValueAttribute;
if (defaultValueAttribute == null)
{
throw new SettingException(string.Format(
CultureInfo.InvariantCulture,
Properties.Resources.SettingErrorMessagePropertyNotHaveDefaultAttribute,
propertyName));
}
// デフォルト値から値を取得して返却
return(defaultValueAttribute.Value?.ToString(CultureInfo.InvariantCulture));
}
/// @brief Reset the property to its default value.
/// @param sender Sender object to this event.
/// @param e Arguments to this event.
private void ResetButton_Click(object sender, EventArgs e)
{
PropertyDescriptor prop; //to get the underlying property
//check if a property is selected and if it is writeable
if (GearPropertyGrid.SelectedGridItem.GridItemType == GridItemType.Property &&
!(prop = GearPropertyGrid.SelectedGridItem.PropertyDescriptor).IsReadOnly)
{
//try to get the default value of the property
DefaultSettingValueAttribute attr =
prop.Attributes[typeof(DefaultSettingValueAttribute)]
as DefaultSettingValueAttribute;
if (attr != null) //if exist
{
//remember old value
object oldValue = prop.GetValue(Settings.Default);
//set the new value
if (prop.CanResetValue(Settings.Default))
{
prop.ResetValue(Settings.Default);
}
else
{
prop.SetValue(
Settings.Default,
Convert.ChangeType(attr.Value, prop.PropertyType));
}
//call the notification event
GearPropertyGrid_PropertyValueChanged(sender, new PropertyValueChangedEventArgs(
GearPropertyGrid.SelectedGridItem, oldValue));
}
GearPropertyGrid.Refresh();
}
}
static AppSetting()
{
/// fetch public property values using Reflection
foreach (PropertyInfo p in typeof(AppSetting).GetProperties())
{
string pt = p.PropertyType.Name;
string pn = p.Name;
object o = ReadObject(pn, pt);
if (o != null && !string.IsNullOrEmpty(pn))
{
p.SetValue(null, o, null);
}
else
{
if (p.GetCustomAttributes(true).Length > 0)
{
object[] defaultValueAttribute =
p.GetCustomAttributes(typeof(DefaultSettingValueAttribute), true);
if (defaultValueAttribute != null && defaultValueAttribute.Length > 0)
{
DefaultSettingValueAttribute dva =
defaultValueAttribute[0] as DefaultSettingValueAttribute;
if (dva != null)
{
p.SetValue(null, dva.Value, null);
o = dva.Value;
}
}
}
}
//Debug.WriteLine("public static {0} {1}={2}", pt, pn, o);
}
/// fetch fields values using Reflection
foreach (FieldInfo fi in
typeof(AppSetting).GetFields(
BindingFlags.NonPublic
| BindingFlags.Static))
{
string pt = fi.FieldType.Name;
string fin = fi.Name;
if (!fin.StartsWith("<"))
{
object o = ReadObject(fin, pt);
fi.SetValue(null, o);
/// Debug.WriteLine("private static {0} {1}={2}", pt, fin, fi.GetValue(null));
}
}
}
/// <summary>
/// Obtains the default value of a setting from the <see cref="DefaultSettingValueAttribute"/>.
/// </summary>
/// <remarks>
/// If translate is true, and the value is the name of an embedded resource, it is automatically translated.
/// </remarks>
public static string GetDefaultValue(PropertyInfo property, bool translate)
{
DefaultSettingValueAttribute a = CollectionUtils.FirstElement <DefaultSettingValueAttribute>(
property.GetCustomAttributes(typeof(DefaultSettingValueAttribute), false));
if (a == null)
{
return("");
}
if (!translate)
{
return(a.Value);
}
return(TranslateDefaultValue(property.ReflectedType, a.Value));
}
/// <summary>
/// Adds default properties to the settings storage of <paramref name="settingsStorageType"/> type.
/// Properties are taken from the type definition. Only those are taken which are decorated with
/// <see cref="DefaultSettingValueAttribute"/> attribute (i.e. have default values)
/// </summary>
/// <param name="settingsStorageType">Type of the settings storage to take properties from</param>
/// <param name="propertyCollection">Collection to add instances of <see cref="SettingsProperty"/> to</param>
/// <param name="propertyValueCollection">Collection to add corresponding instances of <see cref="SettingsPropertyValue"/> to</param>
public static void AddDefaultProperties(
Type settingsStorageType,
SettingsPropertyCollection propertyCollection,
SettingsPropertyValueCollection propertyValueCollection)
{
IEnumerable <PropertyInfo> settingProperties = GetPropertiesWithAttribute(settingsStorageType, typeof(DefaultSettingValueAttribute));
foreach (PropertyInfo settingProperty in settingProperties)
{
DefaultSettingValueAttribute defaultValueAttribute = settingProperty.GetCustomAttributes(typeof(DefaultSettingValueAttribute), false)[0]
as DefaultSettingValueAttribute;
if (defaultValueAttribute != null)
{
SettingsProperty setting = BuildSettingsProperty(
settingProperty.Name, defaultValueAttribute.Value, settingProperty.PropertyType, settingProperty.GetCustomAttributes(true));
SettingsPropertyValue settingValue = BuildSettingsPropertyValue(setting);
propertyCollection.Add(setting);
propertyValueCollection.Add(settingValue);
}
}
}
