protected static ExtendProperty RegisterProperty <TType>(Expression <Func <TType, object> > propertyNameExpression, ObjectRelations relaion = ObjectRelations.Normal)
{
PropertyInfo property = null;
var member = propertyNameExpression.Body as MemberExpression;
if (member == null)
{
var m = propertyNameExpression.Body as UnaryExpression;
member = m.Operand as MemberExpression;
}
property = member.Member as PropertyInfo;
if (relaion == ObjectRelations.Children)
{
childrenTypes.TryAdd(property.Name + "," + property.PropertyType.Name, property.PropertyType);
}
object defvalue = null;
if (property.PropertyType.IsValueType)
{
defvalue = Activator.CreateInstance(property.PropertyType);
}
return(ExtendProperty.RegisterProperty(property.Name, property.PropertyType, typeof(TType), defvalue, null));
}
public static ExtendProperty Get(int key)
{
ExtendProperty property = null;
lock (lockProvider)
{
propertys.TryGetValue(key, out property);
}
return(property);
}
public static ExtendProperty RegisterProperty(string propertyName, Type propertyType, Type ownerType, object defaultValue, MetaData metaData)
{
var property = new ExtendProperty(propertyName, propertyType, ownerType);
property.OverrideDefaultValue(ownerType, defaultValue);
property.MetaData = metaData;
ExtendPropertysProvider.Set(property.GetHashCode(), property);
return(property);
}
public static void Set(int key, ExtendProperty property)
{
if (propertys.Keys.Any(k => k == key))
{
throw new NotSupportedException("不能为类型注册重复的属性!");
}
lock (lockProvider)
{
propertys.TryAdd(key, property);
}
}
public void SetValue(string propertyName, object value)
{
var property = this.GetProperty(propertyName);
if (property != null)
{
this.SetValue(property, value);
}
else
{
var newProperty = ExtendProperty.RegisterProperty(propertyName, typeof(object), OwnerType);
this.SetValue(newProperty, value);
}
}
public bool ClearValue(ExtendProperty property)
{
bool result = false;
int propertyHash = property.GetHashCode();
int key = this.GetHashCode() ^ propertyHash;
if (propertyValues.Keys.Any(k => k == key))
{
object outObj = null;
propertyValues.TryRemove(key, out outObj);
result = true;
}
return(result);
}
/// <summary>
/// 添加验证信息规则
/// </summary>
/// <param name="property">要验证的属性</param>
/// <param name="func">验证规则方法</param>
public void Add(ExtendProperty property, Func <string> func)
{
lock (this)
{
Func <string> fn = func;
if (Rules.TryGetValue(property.PropertyName, out fn))
{
Rules[property.PropertyName] = func;
}
else
{
Rules.Add(property.PropertyName, func);
}
}
}
public object GetValue(ExtendProperty property)
{
int propertyHash = property.GetHashCode();
int key = this.GetHashCode() ^ propertyHash;
object result = null;
if (!propertyValues.TryGetValue(key, out result))
{
result = property.GetDefaultValue(this.OwnerType);
if (result == null)
{
result = property.DefaultValue;
}
}
return(result);
}
public virtual void SetValue(ExtendProperty property, object value)
{
var changingItemArgs =
new ExtendPropertyValueChangingArgs()
{
Value = value,
Item = GetOwner(),
PropertyType = property.PropertyType,
PropertyName = property.PropertyName,
Cancel = false
};
property.OnValueChanging(changingItemArgs);
if (!changingItemArgs.Cancel)
{
var changedItemArgs = new ExtendPropertyValueChangedArgs();
int propertyHash = property.GetHashCode();
int key = this.GetHashCode() ^ propertyHash;
if (propertyValues.Keys.Any(k => k == key))
{
changedItemArgs.OldValue = propertyValues[key];
propertyValues[key] = value;
}
else
{
changedItemArgs.OldValue = null;
propertyValues.TryAdd(key, value);
}
changedItemArgs.Item = GetOwner();
changedItemArgs.PropertyType = property.PropertyType;
changedItemArgs.PropertyName = property.PropertyName;
changedItemArgs.NewValue = value;
changedItemArgs.PropertyInfo = property;
property.OnValueChanged(changedItemArgs);
OnPropertyChanged(property);
//OnChildrenPropertyChanged(changedItemArgs);
}
}
public static ExtendProperty RegisterProperty(string propertyName, Type propertyType, Type ownerType,object defaultValue,MetaData metaData)
{
var property = new ExtendProperty(propertyName, propertyType, ownerType);
property.OverrideDefaultValue(ownerType, defaultValue);
property.MetaData = metaData;
ExtendPropertysProvider.Set(property.GetHashCode(), property);
return property;
}
/// <summary>
/// 注册扩展属性
/// </summary>
/// <param name="obj"></param>
/// <param name="propertyName"></param>
/// <returns></returns>
public static ExtendProperty RegisterProperty(this object obj, string propertyName)
{
return(ExtendProperty.RegisterProperty(propertyName, typeof(object), obj.GetType()));
}
protected virtual void OnPropertyChanged(ExtendProperty property)
{
RaisePropertyChanged(property.PropertyName);
}
