使用 wcf 服务参考类在 silverlight 中进行数据验证答案

【问题标题】：Datavalidation in silverlight with wcf service reference class使用 wcf 服务参考类在 silverlight 中进行数据验证
【发布时间】：2011-01-10 05:03:08
【问题描述】：

嗨，我将 wcf 服务 与 silverlight 一起使用，并且我的数据合同类在参考文件中公开，并且正在将类类型的集合绑定到数据网格，同时单击特定行以编辑整个行数据将绑定到数据表单，我必须验证字段，这里使用 IDataErrorInfo 接口进行验证，在服务参考文件中，该类是一个部分类并创建了一个新的 cs 文件具有相同的服务文件和类名的命名空间，然后实现 IDataErrorInfo 接口属性

公共字符串 this[字符串列名]{}

在我进行验证的范围内。但它不起作用，任何人都可以为此提供帮助。谢谢

【问题讨论】：

标签： silverlight-4.0 data-annotations wcfserviceclient

【解决方案1】：

在使用 Silverlight 4 和 WCF 时，RequiredAttribute 和 DisplayAttribute 等数据注释不会传播到生成的客户端文件。这是解决问题的一种方法... 使用模型创建类库 (Model.dll) 样本

public partial class Person: INotifyPropertyChanged 
{ 
    private Guid IDField; 

    private string NameField; 

    private string LastNameField; 

    private int AgeField; 

    private string EmailField; 

    /// <summary> 
    /// ID of an Object 
    /// </summary>         
    public Guid ID 
    { 
        get 
        { 
            return IDField; 
        } 
        set 
        { 
            if (value != IDField) 
            { 
                Validator.ValidateProperty(value, new ValidationContext(this, null, null) { MemberName = "ID" }); 
                IDField = value; 
                OnPropertyChanged("ID"); 
            } 
        } 
    } 

    /// <summary> 
    /// Name of a person 
    /// </summary> 
    [Required]         
    public string Name 
    { 
        get 
        { 
            return NameField; 
        } 
        set 
        { 
            if (value != NameField) 
            { 
                Validator.ValidateProperty(value, new ValidationContext(this, null, null) { MemberName = "Name" }); 
                NameField = value; 
                OnPropertyChanged("Name"); 
            } 
        } 
    } 

    /// <summary> 
    /// LastName of a person 
    /// </summary> 
    [Required] 
    public string LastName 
    { 
        get 
        { 
            return LastNameField; 
        } 
        set 
        { 
            if (value != LastNameField) 
            { 
                Validator.ValidateProperty(value, new ValidationContext(this, null, null) { MemberName = "LastName" }); 
                LastNameField = value; 
                OnPropertyChanged("LastName"); 
            } 
        } 
    } 

    /// <summary> 
    /// Age of a person 
    /// </summary> 
    [Range(0,120)] 
    //[Required] 
    public int Age 
    { 
        get 
        { 
            return AgeField; 
        } 
        set 
        { 
            if (value != AgeField) 
            { 
                Validator.ValidateProperty(value, new ValidationContext(this, null, null) { MemberName = "Age" }); 
                AgeField = value; 
                OnPropertyChanged("Age"); 
            } 
        } 
    } 

    [RegularBLOCKED EXPRESSION] 
    public string Email 
    { 
        get 
        { 
            return EmailField; 
        } 
        set 
        { 
            if (value != EmailField) 
            { 
                Validator.ValidateProperty(value, new ValidationContext(this, null, null) { MemberName = "Email" }); 
                EmailField = value; 
                OnPropertyChanged("Email"); 
            } 
        } 
    } 

    public event PropertyChangedEventHandler PropertyChanged; 

    /// <summary> 
    /// Raises a property changed notification for the specified property name. 
    /// </summary> 
    /// <param name="propName">The name of the property that changed.</param> 
    protected virtual void OnPropertyChanged(string propName) 
    { 
        if (PropertyChanged != null) 
        { 
            PropertyChanged(this, new PropertyChangedEventArgs(propName)); 
        } 
    } 
}

在服务项目中引用此类库服务样本可以是...

[ServiceContract] 
    public interface IPersonService 
    { 
        [OperationContract] 
        List<Person> GetPersons(); 

        [OperationContract] 
        Person GetPersonByID(Guid ID); 

        [OperationContract] 
        void EditPerson(Person PersonField);         

    } 


///////////////// 



public class PersonService : IPersonService 
    { 
        private List<Person> Persons; 

        public PersonService() 
        { 
            Persons = new List<Person>(); 
            Persons.Add(new Person { ID = Guid.NewGuid(), Name = "Albert", LastName = "Pujols" , Age = 31, Email = "albert-p@mlb.com" }); 
            Persons.Add(new Person { ID = Guid.NewGuid(), Name = "Alex", LastName = "Rodriguez", Age = 36, Email = "alex-r@mlb.com" }); 
            Persons.Add(new Person { ID = Guid.NewGuid(), Name = "Evan", LastName = "Longoria", Age = 25, Email = "evan-l@mlb.com" }); 
            Persons.Add(new Person { ID = Guid.NewGuid(), Name = "Joey", LastName = "Votto", Age = 25, Email = "joey-v@mlb.com" }); 
            Persons.Add(new Person { ID = Guid.NewGuid(), Name = "Miguel", LastName = "Cabrera", Age = 27, Email = "miguel-c@mlb.com" }); 
            Persons.Add(new Person { ID = Guid.NewGuid(), Name = "Kendry", LastName = "Morales", Age = 26, Email = "kendry-m@mlb.com" }); 
            Persons.Add(new Person { ID = Guid.NewGuid(), Name = "Alexei", LastName = "Ramirez", Age = 28, Email = "miguel-c@mlb.com" }); 
        } 


        public List<Person> GetPersons() 
        { 
            return Persons; 
        } 

        public Person GetPersonByID(Guid ID) 
        { 
            return (from sel in Persons where sel.ID == ID select sel).First(); 
        } 

        public void EditPerson(Person PersonField) 
        { 
            Person Person = (from sel in Persons where sel.ID == PersonField.ID select sel).First(); 
            Person = PersonField; 
        }        

    }

创建一个 silverlight 类库 (SL.Model.dll)（此库包含在 Model.dll 中创建的示例模型）
在这个类库中添加现有项目作为链接并添加具有 Model.dll 的模型项在 Silverlight 应用程序中引用 SL.Model.dll 当服务引用是创建视图时，重用类型被检查（这是默认选项）页面样本... xml

<UserControl x:Class="SampleApp.MainPage" 
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
    mc:Ignorable="d" 
             xmlns:dataInput="clr-namespace:System.Windows.Controls;assembly=System.Windows.Controls.Data.Input" 
    d:DesignHeight="300" d:DesignWidth="400" xmlns:sdk="http://schemas.microsoft.com/winfx/2006/xaml/presentation/sdk"> 

    <Grid x:Name="LayoutRoot" Background="White"> 
        <Grid.ColumnDefinitions> 
            <ColumnDefinition Width="55*" /> 
            <ColumnDefinition Width="45*" /> 
        </Grid.ColumnDefinitions> 
        <sdk:DataGrid Name="dataGrid1" Grid.Column="0" IsReadOnly="True" AutoGenerateColumns="False" SelectionChanged="dataGrid1_SelectionChanged" FontSize="12"> 
            <sdk:DataGrid.Columns> 
                <sdk:DataGridTextColumn CanUserSort="True" Binding="{Binding ID}" Visibility="Collapsed" /> 
                <sdk:DataGridTextColumn CanUserSort="True" Binding="{Binding Name}" Header="Name" Width="100" /> 
                <sdk:DataGridTextColumn CanUserSort="True" Binding="{Binding LastName}" Header="LastName" Width="100" />                 
            </sdk:DataGrid.Columns> 
        </sdk:DataGrid> 
        <Grid Grid.Column="1"> 
            <Grid.ColumnDefinitions> 
                <ColumnDefinition Width="40*" /> 
                <ColumnDefinition Width="50*" /> 
                <ColumnDefinition Width="10*" /> 
            </Grid.ColumnDefinitions> 
            <Grid.RowDefinitions> 
                <RowDefinition Height="30"/> 
                <RowDefinition Height="30"/> 
                <RowDefinition Height="30"/> 
                <RowDefinition Height="30"/> 
                <RowDefinition Height="150"/> 
            </Grid.RowDefinitions> 
            <TextBlock HorizontalAlignment="Right" VerticalAlignment="Center" Text="Name" Grid.Row="0" Margin="4" /> 
            <TextBox x:Name="Name" Text="{Binding Name, Mode=TwoWay, ValidatesOnExceptions=true, NotifyOnValidationError=true}" Grid.Row="0" Grid.Column="1" Margin="4" /> 

            <TextBlock HorizontalAlignment="Right" VerticalAlignment="Center" Text="LastName" Grid.Row="1" Margin="4" /> 
            <TextBox x:Name="LName" Text="{Binding LastName, Mode=TwoWay, ValidatesOnExceptions=true, NotifyOnValidationError=true}" Grid.Row="1" Grid.Column="1" Margin="4" /> 

            <TextBlock HorizontalAlignment="Right" VerticalAlignment="Center" Text="Age" Grid.Row="2" Margin="4" /> 
            <TextBox x:Name="Age" Text="{Binding Age, Mode=TwoWay, ValidatesOnExceptions=true, NotifyOnValidationError=true}" Grid.Row="2" Grid.Column="1" Margin="4" /> 

            <TextBlock HorizontalAlignment="Right" VerticalAlignment="Center" Text="Email" Grid.Row="3" Margin="4" /> 
            <TextBox x:Name="Email" Text="{Binding Email, Mode=TwoWay, ValidatesOnExceptions=true, NotifyOnValidationError=true}" Grid.Row="3" Grid.Column="1" Margin="4" /> 

            <dataInput:ValidationSummary Margin="4" Grid.Row="4" Grid.ColumnSpan="3" /> 


        </Grid> 



    </Grid> 
</UserControl>

控制代码...

public partial class MainPage : UserControl 
    { 
        private PersonServiceClient Client; 
        private EndpointAddress AddressService = new EndpointAddress(new Uri("http://localhost:3589/PersonService.svc")); 

        public MainPage() 
        { 
            InitializeComponent(); 

            Client = new PersonServiceClient(new BasicHttpBinding(), AddressService); 
            Client.GetPersonsAsync(); 
            Client.GetPersonsCompleted += new EventHandler<GetPersonsCompletedEventArgs>(Client_GetPersonsCompleted); 
        } 

        void Client_GetPersonsCompleted(object sender, GetPersonsCompletedEventArgs e) 
        { 
            ObservableCollection<Person> PersonItems = e.Result; 
            dataGrid1.ItemsSource = PersonItems;             
        } 

        private void dataGrid1_SelectionChanged(object sender, SelectionChangedEventArgs e) 
        { 
            DataContext = e.AddedItems[0]; 
        } 
    }

【讨论】：