Бизнес приложения с помощью Silverlight 3. DataGrid - группировка, сортировка и проверка данных.

C#-Code:

using System;
using System.Collections.Generic;
using System.ComponentModel; 


namespace BlendWorld.Silverlight3.ComponentModelSample
{
    public class Person : INotifyPropertyChanged
    {
        public static List<Person> GetPeoples()
        {
            return new List<Person>
                            {
                                new Person {FirstName = "Tim", LastName = "Franklin", City = "New York", Age = 18, Phone = "111-111-1111"},
                                new Person {FirstName = "Lisa", LastName = "Washington", City = "Chicago", Age = 20, Phone = "222-222-2222"},
                                new Person {FirstName = "Zoe", LastName = "Johnson", City = "Miami", Age = 35, Phone = "333-333-3333"},
                                new Person {FirstName = "Zane", LastName = "Franklin", City = "Seattle", Age = 19, Phone = "444-444-4444"},
                                new Person {FirstName = "Jack", LastName = "Washington", City = "New York", Age = 40, Phone = "555-555-5555"},
                                new Person {FirstName = "Jean", LastName = "Johnson", City = "Chicago", Age = 32, Phone = "666-666-6666"},
                                new Person {FirstName = "Jessika", LastName = "Franklin", City = "Miami", Age = 27, Phone = "777-777-7777"},
                                new Person {FirstName = "Jean", LastName = "Johnson", City = "Seattle", Age = 25, Phone = "888-888-8888"},
                            };
        } 


        string firstName;
        string lastName;
        int age;
        string city;
        string phone;
        DateTime birthDate; 


        public string FirstName
        {
            get
            {
                return firstName;
            }
            set
            {
                if (firstName != value)
                {
                     firstName = value;
                    OnPropertyChanged("FirstName");
                }
            }
        } 


        public string LastName
        {
            get
            {
                return lastName;
            }
            set
            {
                if (lastName != value)
                {
                    lastName = value;
                    OnPropertyChanged("LastName");
                }
            }
        } 


        public int Age
        {
            get
            {
                return age;
            }
            set
            {
                if (age != value)
                {
                     age = value;
                    OnPropertyChanged("Age");
                }
            }
        } 


        public string City
        {
            get
            {
                return city;
            }
            set
            {
                if (city != value)
                {
                    city = value;
                    OnPropertyChanged("City");
                }
            }
        } 


        public string Phone
        {
            get
            {
                return phone;
            }
            set
            {
                if (phone != value)
                {
                     phone = value;
                    OnPropertyChanged("Phone");
                }
            }
        } 


        public string FullName
        {
            get
            {
                return string.Format("{0} {1}", firstName, lastName);
            }
        } 


        #region INotifyPropertyChanged Members 


        protected void OnPropertyChanged(string propertyName)
        {
            if (PropertyChanged != null)
            {
                PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
            }
        } 


        public event PropertyChangedEventHandler PropertyChanged; 


        #endregion
    }
}

XML-Code:

<UserControl x:Class="BlendWorld.Silverlight3.ComponentModelSample.MainPage"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:data="clr-namespace:System.Windows.Controls;assembly=System.Windows.Controls.Data"
    Width="600" Height="300">
    <Grid x:Name="LayoutRoot" Background="White">
        <data:DataGrid ItemsSource="{Binding}">
        </data:DataGrid>
    </Grid>
</UserControl>

XML-Code:

<UserControl x:Class="BlendWorld.Silverlight3.ComponentModelSample.MainPage"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:data="clr-namespace:System.Windows.Controls;assembly=System.Windows.Controls.Data"
    xmlns:scm="clr-namespace:System.ComponentModel;assembly=System.Windows"
    Width="630" Height="300">
    <Grid x:Name="LayoutRoot" Background="White">
        <data:DataGrid ItemsSource="{Binding}">
            <data:DataGrid.SortDescriptions>
                <scm:SortDescription PropertyName="Age" Direction="Descending"/>
                <scm:SortDescription PropertyName="FullName" Direction="Ascending"/>
            </data:DataGrid.SortDescriptions>
        </data:DataGrid>
    </Grid>
</UserControl>

XML-Code:

<UserControl x:Class="BlendWorld.Silverlight3.ComponentModelSample.MainPage"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:data="clr-namespace:System.Windows.Controls;assembly=System.Windows.Controls.Data"
    xmlns:cm="clr-namespace:System.Windows.Data;assembly=System.ComponentModel"
    Width="630" Height="300">
    <Grid x:Name="LayoutRoot" Background="White">
        <data:DataGrid ItemsSource="{Binding}">
            <data:DataGrid.GroupDescriptions>
                <cm:PropertyGroupDescription PropertyName="City" />
            </data:DataGrid.GroupDescriptions>
        </data:DataGrid>
    </Grid>
</UserControl>

C#-Code:

public string FirstName
{
    get
    {
        return firstName;
    }
    set
    {
        if (firstName != value)
        {
            if (string.IsNullOrEmpty(value))
            {
                throw new ValidationException("First Name cannot be empty");
            }
            firstName = value;
            OnPropertyChanged("FirstName");
        }
    }
}

C#-Code:

[Required]
[Range(18, 50)]
public int Age
{
    get
    {
        return age;
    }
    set
    {
        if (age != value)
        {
            age = value;
            OnPropertyChanged("Age");
        }
    }
}

C#-Code:

[Required]
[Range(18, 50)]
public int Age
{
    get
    {
        return age;
    }
    set
    {
        if (age != value)
        {
            Validator.ValidateProperty(value, new ValidationContext(this, null, null) { MemberName = "Age" }); 
            age = value;
            OnPropertyChanged("Age");
        }
    }
}

C#-Code:

[Required]
[RegularExpression("\\d{3}[-]\\d{3}[-]\\d{4}", ErrorMessage = "Invalid phone")]
public string Phone
{
    get
    {
        return phone;
    }
    set
    {
        if (phone != value)
        {
            Validator.ValidateProperty(value, new ValidationContext(this, null, null) { MemberName = "Phone" });
            phone = value;
            OnPropertyChanged("Phone");
        }
    }
}

C#-Code:

public DateTime BirthDate
{
    get
    {
        return birthDate;
    }
    set
    {
        if (birthDate != value)
        {
            birthDate = value;
            OnPropertyChanged("BirthDate");
        }
    }
}

C#-Code:

public static class PersonValidator
{
    public static bool IsValidBirthDay(object personObject, ValidationContext context, out ValidationResult validationResult)
    {
        validationResult = null;
        var person = personObject as Person;
        int dateComparison = person.BirthDate.CompareTo(DateTime.Today);
        if (dateComparison > 1)
        {
            var properties = new List<string> { "BirthDate" };
            validationResult = new ValidationResult("Birthday cannot be further than today!", properties);
        }
        return !(dateComparison > 1);
    } 


    public static bool IsValidBirthDayAge(object personObject, ValidationContext context, out ValidationResult validationResult)
    {
        validationResult = null;
        var person = personObject as Person;
        int age = DateTime.Today.Year - person.BirthDate.Year;
        if (age != person.Age)
        {
            var properties = new List<string> { "Age", "BirthDate" };
            validationResult = new ValidationResult("Age does not match with Birthday! Your age should be " + age, properties);
        }
        return (age == person.Age);
    }
}

C#-Code:

[CustomValidation(typeof(PersonValidator), "IsValidBirthDay")]
[CustomValidation(typeof(PersonValidator), "IsValidBirthDayAge")]
public class Person : INotifyPropertyChanged