DataAnnotation による検証

コントロールがデータソースに連結されている場合、データを表すエンティティクラスに .NET Framework で提供される DataAnnotation で提供される検証に関する属性を設定する方法があります。属性はプロパティ、およびクラスに対して設定できます。

フィールドを検証

エンティティを検証

サンプルコード

次のサンプルコードは DataAnnotation を使用して ID プロパティに必須入力の検証を、Employee クラスに「入社日」と「誕生日」の比較検証を設定します。なお、コントロールをデータソースに連結する方法について詳しくは「データ連結の基本」を参照してください。

XAML	コードのコピー
<sg:GcSpreadGrid ItemsSource="{StaticResource EmployeeCollection}">

Employee および EmployeeCollection クラス（C#）

C#	コードのコピー
[CustomValidation(typeof(EmployeeValidator), "IsGrownUp")] public class Employee : INotifyPropertyChanged { string id; string name; DateTime hiredate; DateTime birthday; [Required(ErrorMessage = "IDは必ず入力してください。")] public string ID { set { id = value; NotifyPropertyChanged("ID");} get { return id; } } [Display(ShortName="氏名")] public string Name { set { name = value; NotifyPropertyChanged("Name"); } get { return name; } } [Display(ShortName = "入社日")] public DateTime HireDate { set { hiredate = value; NotifyPropertyChanged("HireDate"); } get { return hiredate; } } [Display(ShortName = "誕生日")] public DateTime Birthday { set { birthday = value; NotifyPropertyChanged("Birthday"); } get { return birthday; } } public event PropertyChangedEventHandler PropertyChanged; protected void NotifyPropertyChanged(string propertyName) { if (PropertyChanged != null) PropertyChanged(this, new PropertyChangedEventArgs(propertyName)); } } public class EmployeeValidator { public static ValidationResult IsGrownUp(Employee employee) { ValidationResult result = null; if (employee.Birthday.AddYears(20).CompareTo(employee.HireDate) == 1) result = new ValidationResult("20歳以上の方しか勤務できません。", new string[] { "Birthday", "HireDate" }); return result; } } public class EmployeeCollection : ObservableCollection<Employee> { public EmployeeCollection() { Add(new Employee() { ID = "U10200115", Name = "福山敏道", HireDate = DateTime.Parse("2003/12/1"), Birthday=DateTime.Parse("1977/9/17")}); } }

コードのコピー

[CustomValidation(typeof(EmployeeValidator), "IsGrownUp")]
public class Employee : INotifyPropertyChanged
{
    string id;
    string name;      
    DateTime hiredate;
    DateTime birthday;

    [Required(ErrorMessage = "IDは必ず入力してください。")]
    public string ID
    {
        set { id = value; NotifyPropertyChanged("ID");}
        get { return id; }
    }
    [Display(ShortName="氏名")]       
    public string Name
    {
        set { name = value; NotifyPropertyChanged("Name"); }
        get { return name; }
    }
    [Display(ShortName = "入社日")]
    public DateTime HireDate
    {
        set
        {
            hiredate = value; NotifyPropertyChanged("HireDate");
        }
        get { return hiredate; }
    }
    [Display(ShortName = "誕生日")]
    public DateTime Birthday
    {
        set { birthday = value; NotifyPropertyChanged("Birthday"); }
        get { return birthday; }
    }
    public event PropertyChangedEventHandler PropertyChanged;
    protected void NotifyPropertyChanged(string propertyName)
    {
        if (PropertyChanged != null)
            PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
    }
}
public class EmployeeValidator
{
    public static ValidationResult IsGrownUp(Employee employee)
    {
        ValidationResult result = null;
        if (employee.Birthday.AddYears(20).CompareTo(employee.HireDate) == 1)
            result = new ValidationResult("20歳以上の方しか勤務できません。", new string[] { "Birthday", "HireDate" });
        return result;
    }
}
public class EmployeeCollection : ObservableCollection<Employee>
{
    public EmployeeCollection()
    {
        Add(new Employee() { ID = "U10200115", Name = "福山 敏道",
            HireDate = DateTime.Parse("2003/12/1"), Birthday=DateTime.Parse("1977/9/17")});           
    }
}

Employee および EmployeeCollection クラス（Visual Basic）

Visual Basic	コードのコピー
<CustomValidation(GetType(EmployeeValidator), "IsGrownUp")> _ Public Class Employee Implements INotifyPropertyChanged Private m_id As String Private m_name As String Private m_hiredate As DateTime Private m_birthday As DateTime <Required(ErrorMessage:="IDは必ず入力してください。")> Public Property ID() As String Get Return m_id End Get Set(value As String) m_id = value NotifyPropertyChanged("ID") End Set End Property <Display(ShortName:="氏名")> _ Public Property Name() As String Get Return m_name End Get Set(value As String) m_name = value NotifyPropertyChanged("Name") End Set End Property <Display(ShortName:="入社日")> _ Public Property HireDate() As DateTime Get Return m_hiredate End Get Set(value As DateTime) m_hiredate = value NotifyPropertyChanged("HireDate") End Set End Property <Display(ShortName:="誕生日")> _ Public Property Birthday() As DateTime Get Return m_birthday End Get Set(value As DateTime) m_birthday = value NotifyPropertyChanged("Birthday") End Set End Property Public Event PropertyChanged As PropertyChangedEventHandler Implements INotifyPropertyChanged.PropertyChanged Protected Sub NotifyPropertyChanged(propertyName As String) RaiseEvent PropertyChanged(Me, New PropertyChangedEventArgs(propertyName)) End Sub End Class Public Class EmployeeValidator Public Shared Function IsGrownUp(employee As Employee) As ValidationResult Dim result As ValidationResult = Nothing If employee.Birthday.AddYears(20).CompareTo(employee.HireDate) = 1 Then result = New ValidationResult("20歳以上の方しか勤務できません。", New String() {"Birthday", "HireDate"}) End If Return result End Function End Class Public Class EmployeeCollection Inherits ObservableCollection(Of Employee) Public Sub New() Add(New Employee() With {.ID = "U10200115", .Name = "福山敏道", _ .HireDate = DateTime.Parse("2003/12/1"), .Birthday = DateTime.Parse("1977/9/17")}) End Sub End Class

Visual Basic

コードのコピー

<CustomValidation(GetType(EmployeeValidator), "IsGrownUp")> _
Public Class Employee
    Implements INotifyPropertyChanged
    Private m_id As String
    Private m_name As String
    Private m_hiredate As DateTime
    Private m_birthday As DateTime

    <Required(ErrorMessage:="IDは必ず入力してください。")>
    Public Property ID() As String
        Get
            Return m_id
        End Get
        Set(value As String)
            m_id = value
            NotifyPropertyChanged("ID")
        End Set
    End Property
    <Display(ShortName:="氏名")> _
    Public Property Name() As String
        Get
            Return m_name
        End Get
        Set(value As String)
            m_name = value
            NotifyPropertyChanged("Name")
        End Set
    End Property
    <Display(ShortName:="入社日")> _
    Public Property HireDate() As DateTime
        Get
            Return m_hiredate
        End Get
        Set(value As DateTime)
            m_hiredate = value
            NotifyPropertyChanged("HireDate")
        End Set
    End Property
    <Display(ShortName:="誕生日")> _
    Public Property Birthday() As DateTime
        Get
            Return m_birthday
        End Get
        Set(value As DateTime)
            m_birthday = value
            NotifyPropertyChanged("Birthday")
        End Set
    End Property
    Public Event PropertyChanged As PropertyChangedEventHandler Implements INotifyPropertyChanged.PropertyChanged
    Protected Sub NotifyPropertyChanged(propertyName As String)
        RaiseEvent PropertyChanged(Me, New PropertyChangedEventArgs(propertyName))
    End Sub
End Class
Public Class EmployeeValidator
    Public Shared Function IsGrownUp(employee As Employee) As ValidationResult
        Dim result As ValidationResult = Nothing
        If employee.Birthday.AddYears(20).CompareTo(employee.HireDate) = 1 Then
            result = New ValidationResult("20歳以上の方しか勤務できません。", New String() {"Birthday", "HireDate"})
        End If
        Return result
    End Function
End Class
Public Class EmployeeCollection
    Inherits ObservableCollection(Of Employee)
    Public Sub New()
        Add(New Employee() With {.ID = "U10200115", .Name = "福山 敏道", _
                                 .HireDate = DateTime.Parse("2003/12/1"), .Birthday = DateTime.Parse("1977/9/17")})
    End Sub
End Class