mvvm 라이트 프레임 워크를 배우려면이 http://msdn.microsoft.com/en-us/magazine/jj651572.aspx을 읽는 중입니다. 소스 코드 Friend.cs를 다운로드합니다.Set()와 RaisePropertyChanged()의 차이점
제 질문은 다른 속성의 일부 설정 방법이 다르게 구현되는 이유입니다.
예를 들어 이름에 대한 설정자는 _firstName에 'ref'키워드가 필요한 이유입니다.
Set(FirstNamePropertyName, ref _firstName, value);
그리고 DateOfBirthString 용 세터
가namespace MyFriends.Model
{
[SimpleSerialize]
public class Friend : ObservableObject
{
/// <summary>
/// The <see cref="FirstName" /> property's name.
/// </summary>
public const string FirstNamePropertyName = "FirstName";
private string _firstName;
/// <summary>
/// Sets and gets the FirstName property.
/// Changes to that property's value raise the PropertyChanged event.
/// </summary>
[SimpleSerialize(FieldName = "first_name")]
public string FirstName
{
get
{
return _firstName;
}
set
{
Set(FirstNamePropertyName, ref _firstName, value);
}
}
/// <summary>
/// The <see cref="LastName" /> property's name.
/// </summary>
public const string LastNamePropertyName = "LastName";
private string _lastName;
/// <summary>
/// Sets and gets the LastName property.
/// Changes to that property's value raise the PropertyChanged event.
/// </summary>
[SimpleSerialize(FieldName = "last_name")]
public string LastName
{
get
{
return _lastName;
}
set
{
Set(LastNamePropertyName, ref _lastName, value);
}
}
/// <summary>
/// The <see cref="DateOfBirth" /> property's name.
/// </summary>
public const string DateOfBirthPropertyName = "DateOfBirth";
private string _dateOfBirthString;
/// <summary>
/// Sets and gets the DateOfBirth property.
/// Changes to that property's value raise the PropertyChanged event.
/// </summary>
[SimpleSerialize(FieldName = "birthday")]
public string DateOfBirthString
{
get
{
return _dateOfBirthString;
}
set
{
_dateOfBirthString = value;
RaisePropertyChanged(() => DateOfBirth);
}
}
public DateTime DateOfBirth
{
get
{
if (string.IsNullOrEmpty(_dateOfBirthString))
{
return DateTime.MinValue;
}
return DateTime.ParseExact(DateOfBirthString, "d", CultureInfo.InvariantCulture);
}
set
{
_dateOfBirthString = value.ToString("d", CultureInfo.InvariantCulture);
}
}
private string _imageUrl;
[SimpleSerialize(FieldName = "picture")]
public string ImageUrl
{
get
{
return _imageUrl;
}
set
{
_imageUrl = value;
RaisePropertyChanged(() => ImageUri);
}
}
public Uri ImageUri
{
get
{
return new Uri(_imageUrl);
}
}
}
}