Silverlight 控件的验证

 <Grid x:Name="LayoutRoot">
        <TextBlock Height="23" HorizontalAlignment="Left" Margin="56,23,0,0" Text="用户编号：" VerticalAlignment="Top" />
        <TextBlock Height="23" HorizontalAlignment="Left" Margin="56,110,0,0"  Text="出生年月:" VerticalAlignment="Top" />
        <TextBlock Height="23" HorizontalAlignment="Left" Margin="56,81,0,0"  Text="用户年龄:" VerticalAlignment="Top" />
        <TextBlock Height="23" HorizontalAlignment="Left" Margin="56,52,0,0"  Text="用户名称：" VerticalAlignment="Top" />
        <Rectangle Height="185" HorizontalAlignment="Left" Margin="44,9,0,0" Name="rectangle1" Stroke="Black" StrokeThickness="1" VerticalAlignment="Top" Width="351" />
        <TextBox Height="23" Text="{Binding UserCode,Mode=TwoWay,ValidatesOnExceptions=True,NotifyOnValidationError=True}" HorizontalAlignment="Left" Margin="127,21,0,0" Name="txtUserCode" VerticalAlignment="Top" Width="120" />
        <sdk:DescriptionViewer Margin="253,20,245,440" Height="20" Triggers="{Binding ElementName=txtUserCode}" PropertyPath="UserCode"></sdk:DescriptionViewer>
        <TextBox  Text="{Binding UserAge,Mode=TwoWay,ValidatesOnExceptions=True,NotifyOnValidationError=True}" Height="23" HorizontalAlignment="Left" Margin="127,81,0,0" Name="txtUserAge" VerticalAlignment="Top" Width="120" />
        <sdk:DescriptionViewer Height="20" Margin="253,84,245,376"  Triggers="{Binding ElementName=txtUserAge}" PropertyPath="UserAge"/>
        <TextBox  Text="{Binding UserName,Mode=TwoWay,ValidatesOnExceptions=True,NotifyOnValidationError=True}" Height="23" HorizontalAlignment="Left" Margin="127,52,0,0" Name="txtUserName" VerticalAlignment="Top" Width="120" />
        <sdk:DescriptionViewer Height="20" Margin="253,52,245,408" Triggers="{Binding ElementName=txtUserName}" PropertyPath="UserName" />
        <sdk:DatePicker  Text="{Binding UserBorthDay,Mode=TwoWay,ValidatesOnExceptions=True,NotifyOnValidationError=True}" Height="23" HorizontalAlignment="Left" Margin="127,110,0,0" Name="txtUserBorthDay" VerticalAlignment="Top" Width="120" />
        <sdk:DescriptionViewer Height="20" Margin="253,113,245,347" Triggers="{Binding ElementName=txtUserBorthDay}" PropertyPath="UserBorthDay" />
        <sdk:ValidationSummary Margin="44,137,245,288"></sdk:ValidationSummary>
    </Grid>

using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
using System.Linq;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;
using System.Windows.Navigation;

namespace SLDemo3.Views
{
    public partial class Page1 : Page
    {
        public Page1()
        {
            InitializeComponent();
            this.DataContext = new UserInfo(1001, "赵大", 23, DateTime.Now);
        }

        // 当用户导航到此页面时执行。
        protected override void OnNavigatedTo(NavigationEventArgs e)
        {
        }

    }

    /// <summary>
    /// 用户信息
    /// </summary>
    public class UserInfo
    {
        /// <summary>
        /// 用户编号
        /// </summary>
        private int _UserCode;
        /// <summary>
        /// 用户名称
        /// </summary>
        private string _UserName;
        /// <summary>
        /// 用户年龄
        /// </summary>
        private int _UserAge; 
        /// <summary>
        /// 出生年月
        /// </summary>
        private DateTime _UserBorthDay;

        public UserInfo(int usercode, string username, int userage, DateTime userborthday)
        {
            _UserCode = usercode;
            _UserName = username;
            _UserAge = userage;
            _UserBorthDay = userborthday;
        }

        [Display(Name = "UserCode",Description = "请输入正确的用户编号！在1000到9999之间！")]   //显示
        [Range(1000, 9999, ErrorMessage = "请输入正确的用户编号！在1000到9999之间！")]
        public int UserCode
        {
            get { return _UserCode; }
            set
            {
                Validator.ValidateProperty(value,new ValidationContext(this,null,null)
                    {
                        MemberName = "UserCode"
                    });
                _UserCode = value;
            }
        }
        [Display(Name = "UserName",Description = "用户名称！")]
        [Required(ErrorMessage = "请输入正确的用户名！")]
        public string UserName
        {
            get { return _UserName; }
            set
            {
                Validator.ValidateProperty(value,new ValidationContext(this,null,null)
                    {
                        MemberName = "UserName"
                    });
                _UserName = value;
            }
        }
        [Display(Name = "UserAge",Description = "用户年龄！在18到90之间！")]
        [Range(18, 90, ErrorMessage = "用户年龄！在18到90之间！")]
        public int UserAge
        {
            get { return _UserAge; }
            set
            {
                Validator.ValidateProperty(value,new ValidationContext(this,null,null)
                    {
                        MemberName = "UserAge"
                    });
                _UserAge = value;
            }
        }
        [Display(Name = "UserBorthDay", Description = "出生年月！")]
        public DateTime UserBorthDay
        {
            get { return _UserBorthDay; }
            set
            {
                Validator.ValidateProperty(value,new ValidationContext(this,null,null)
                    {
                        MemberName = "UserBorthDay"
                    });
                _UserBorthDay = value;
            }
        }
    }
}

ValidationSummary 控件显示给定容器的验证错误的合并列表。

DisplayAttribute 特性应用于属性以指定用于增强这些属性值的显示的值