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  • WPF前台数据验证（红框）Validation.ErrorTemplate 附加属性

    WPF 显示验证错误的默认方式是在控件周围绘制红色边框。通常需要对此方法进行自定义，以通过其他方式来显示错误。而且，默认情况下不会显示与验证错误关联的错误消息。常见的要求是仅当存在验证错误时才在工具提示中显示错误消息。通过将 Styles 和一组与验证关联的附加属性进行组合，可以相当轻松地自定义验证错误显示。

    前台xaml：

    [csharp] view plain copy
     
    1. <ResourceDictionary  
    2.     xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"   
    3.     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:Microsoft_Windows_Themes="clr-namespace:Microsoft.Windows.Themes;assembly=PresentationFramework.Aero">  
    4.     <!-- 应该在此定义资源字典条目。-->  
    5.     <LinearGradientBrush x:Key="TextBoxBorder" EndPoint="0,20" StartPoint="0,0" MappingMode="Absolute">  
    6.         <GradientStop Color="#ABADB3" Offset="0.05"/>  
    7.         <GradientStop Color="#E2E3EA" Offset="0.07"/>  
    8.         <GradientStop Color="#E3E9EF" Offset="1"/>  
    9.     </LinearGradientBrush>  
    10.     <ControlTemplate x:Key="validationTemplate">  
    11.   
    12.     </ControlTemplate>  
    13.     <Style BasedOn="{x:Null}" TargetType="{x:Type TextBox}">  
    14.         <Setter Property="Validation.ErrorTemplate" Value="{StaticResource validationTemplate}" />  
    15.         <Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.ControlTextBrushKey}}"/>  
    16.         <Setter Property="Background" Value="{DynamicResource {x:Static SystemColors.WindowBrushKey}}"/>  
    17.         <Setter Property="BorderBrush" Value="{StaticResource TextBoxBorder}"/>  
    18.         <Setter Property="BorderThickness" Value="1"/>  
    19.         <Setter Property="Padding" Value="1"/>  
    20.         <Setter Property="AllowDrop" Value="true"/>  
    21.         <Setter Property="FocusVisualStyle" Value="{x:Null}"/>  
    22.         <Setter Property="Template">  
    23.             <Setter.Value>  
    24.                 <ControlTemplate TargetType="{x:Type TextBox}">  
    25.                     <Grid x:Name="root">  
    26.                         <Grid.ColumnDefinitions>  
    27.                             <ColumnDefinition Width="*"/>  
    28.                             <ColumnDefinition Width="1"/>  
    29.                         </Grid.ColumnDefinitions>  
    30.                         <!--<Border x:Name="Border" Background="White" BorderBrush="Gray" BorderThickness="0" Padding="2" CornerRadius="1">-->  
    31.                                 <Microsoft_Windows_Themes:ListBoxChrome x:Name="Bd" SnapsToDevicePixels="true" Background="{TemplateBinding Background}" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" RenderFocused="{TemplateBinding IsKeyboardFocusWithin}" RenderMouseOver="{TemplateBinding IsMouseOver}">  
    32.                                     <ScrollViewer x:Name="PART_ContentHost" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/>  
    33.                                 </Microsoft_Windows_Themes:ListBoxChrome>  
    34.                             <!--</Border>-->  
    35.                         <Border x:Name="border"  BorderBrush="#FFDB000C" BorderThickness="1" CornerRadius="1" Visibility="Collapsed"  HorizontalAlignment="Stretch" Margin="0" Width="Auto">  
    36.   
    37.                             <Grid Background="Transparent" HorizontalAlignment="Right" Height="12" Margin="1,-4,-4,0" VerticalAlignment="Top" Width="12">  
    38.                                 <Path Data="M 1,0 L6,0 A 2,2 90 0 1 8,2 L8,7 z" Fill="#FFDC000C" Margin="1,3,0,0"/>  
    39.                                 <Path Data="M 0,0 L2,0 L 8,6 L8,8" Fill="#ffffff" Margin="1,3,0,0"/>  
    40.                             </Grid>  
    41.                         </Border>  
    42.                         <Popup x:Name="popup" Placement="Right" IsOpen="False">  
    43.                             <Border x:Name="border1_Copy" Width="Auto" Height="Auto" Background="Red" BorderThickness="0" >  
    44.                                 <TextBlock TextWrapping="NoWrap" Text="{Binding (Validation.Errors)[0].ErrorContent, RelativeSource={RelativeSource TemplatedParent}}" HorizontalAlignment="Center" VerticalAlignment="Center" Foreground="White"/>  
    45.                             </Border>  
    46.                             <!--<Grid Width="50" Height="20" Background="Red"/>-->  
    47.   
    48.                         </Popup>  
    49.                         <!--<Popup x:Name="popup"  Placement="Right" PlacementTarget="{Binding RelativeSource={RelativeSource TemplatedParent}}"  Grid.Column="1" HorizontalAlignment="Left" VerticalAlignment="Top" IsOpen="False" StaysOpen="True" AllowsTransparency="True">  
    50.                             <Border x:Name="border1_Copy" BorderThickness="1" Margin="0" Background="Red" CornerRadius="2"  HorizontalAlignment="Stretch" Opacity="0" RenderTransformOrigin="0.5,0.5" Height="Auto" Width="Auto">  
    51.                                 <Border.RenderTransform>  
    52.                                     <TransformGroup>  
    53.                                         <ScaleTransform/>  
    54.                                         <SkewTransform/>  
    55.                                         <RotateTransform/>  
    56.                                         <TranslateTransform X="10"/>  
    57.                                     </TransformGroup>  
    58.                                 </Border.RenderTransform>  
    59.                                 <Border.Effect>  
    60.                                     <DropShadowEffect Direction="-90" BlurRadius="5" Color="#FF808080" ShadowDepth="1"/>  
    61.                                 </Border.Effect>  
    62.                                 <TextBlock TextWrapping="NoWrap" Text="{Binding (Validation.Errors)[0].ErrorContent, RelativeSource={RelativeSource TemplatedParent}}" HorizontalAlignment="Center" VerticalAlignment="Center" Foreground="White"/>  
    63.                             </Border>  
    64.                         </Popup>-->  
    65.                     </Grid>  
    66.                     <ControlTemplate.Triggers>  
    67.                         <Trigger Property="Validation.HasError" Value="True">  
    68.                             <Setter Property="Visibility" TargetName="border" Value="Visible"/>  
    69.                         </Trigger>  
    70.                         <MultiTrigger>  
    71.                             <MultiTrigger.Conditions>  
    72.                                 <Condition Property="Validation.HasError" Value="True"/>  
    73.                                 <Condition Property="IsFocused" Value="True"/>  
    74.                             </MultiTrigger.Conditions>  
    75.                             <Setter Property="IsOpen" TargetName="popup" Value="True"/>  
    76.                         </MultiTrigger>  
    77.                     </ControlTemplate.Triggers>  
    78.                 </ControlTemplate>  
    79.             </Setter.Value>  
    80.         </Setter>  
    81.     </Style>  
    82.     <!--<Style TargetType="TextBox">  
    83.         <Style.Triggers>  
    84.   
    85.             <Trigger Property="Validation.HasError"   
    86.               Value="True">  
    87.   
    88.                 <Setter Property="ToolTip">  
    89.   
    90.                     <Setter.Value>  
    91.   
    92.                         <Binding Path="(Validation.Errors).CurrentItem.ErrorContent" RelativeSource="{x:Static RelativeSource.Self}" />  
    93.   
    94.                     </Setter.Value>  
    95.   
    96.                 </Setter>  
    97.   
    98.             </Trigger>  
    99.   
    100.         </Style.Triggers>  
    101.   
    102.     </Style>-->  
    103. </ResourceDictionary>  


    后台代码：

    [csharp] view plain copy
     
    1. using System;  
    2. using System.Collections.Generic;  
    3. using System.Linq;  
    4. using System.Text;  
    5. using System.Windows;  
    6. using System.Windows.Controls;  
    7. using System.Windows.Data;  
    8. using System.Windows.Documents;  
    9. using System.Windows.Input;  
    10. using System.Windows.Media;  
    11. using System.Windows.Media.Imaging;  
    12. using System.Windows.Navigation;  
    13. using System.Windows.Shapes;  
    14.   
    15. namespace WpfApplication11111  
    16. {  
    17.     /// <summary>  
    18.     /// UserControl2.xaml 的交互逻辑  
    19.     /// </summary>  
    20.     public partial class UserControl2 : UserControl  
    21.     {  
    22.         private UserInfo _UserInfo;  
    23.         public UserControl2()  
    24.         {  
    25.             InitializeComponent();  
    26.             this.Loaded += new RoutedEventHandler(UserControl2_Loaded);  
    27.         }  
    28.   
    29.         void UserControl2_Loaded(object sender, RoutedEventArgs e)  
    30.         {  
    31.             _UserInfo = new UserInfo();  
    32.             this.DataContext = _UserInfo;  
    33.         }  
    34.   
    35.         private void btnSave_Click(object sender, RoutedEventArgs e)  
    36.         {  
    37.             //txtName.Visibility = Visibility.Collapsed;  
    38.             UserControl1 _UserControl1 = new UserControl1();  
    39.             grid.Children.Add(_UserControl1);  
    40.             string _name = _UserInfo.Name;  
    41.             string _pass = _UserInfo.Pass;  
    42.         }  
    43.     }  
    44. }  

    实体类：

    [csharp] view plain copy
     
    1. using System;  
    2. using System.Collections.Generic;  
    3. using System.Linq;  
    4. using System.Text;  
    5. using System.ComponentModel;  
    6. using System.ComponentModel.DataAnnotations;  
    7.   
    8. namespace WpfApplication11111  
    9. {  
    10.     public class UserInfo : ValidationUtility, INotifyPropertyChanged  
    11.     {  
    12.         #region 数据更新通知  
    13.   
    14.         public event PropertyChangedEventHandler PropertyChanged;  
    15.   
    16.         private void NotifyPropertyChange(string propertyName)  
    17.         {  
    18.             if (PropertyChanged != null)  
    19.             {  
    20.                 PropertyChanged(this, new PropertyChangedEventArgs(propertyName));  
    21.             }  
    22.         }  
    23.  
    24.         #endregion  
    25.   
    26.         private string _Name;  
    27.   
    28.         [Required(ErrorMessage = "[登录名]内容不能为空！")]  
    29.         [StringLength(255, ErrorMessage = "[登录名]内容最大允许255个字符！")]  
    30.         [RegularExpression("^[A-Za-z0-9]+$", ErrorMessage = "[登录名]格式不正确！")]  
    31.         /// <summary>  
    32.         ///   
    33.         /// </summary>  
    34.         public string Name  
    35.         {  
    36.             get { return _Name; }  
    37.             set  
    38.             {  
    39.                 //Validator.ValidateProperty(value, new ValidationContext(this, null, null) { MemberName = "Name" });  
    40.                 //if (string.IsNullOrEmpty(value))  
    41.                 //{  
    42.                 //    throw new Exception("用户名不能为空.");  
    43.                 //}  
    44.                 _Name = value;  
    45.                 NotifyPropertyChange("Name");  
    46.             }  
    47.         }  
    48.   
    49.         private string _Pass;  
    50.         [Required(ErrorMessage = "[密码]内容不能为空！")]  
    51.         [StringLength(255, ErrorMessage = "[密码]内容最大允许255个字符！")]  
    52.         [RegularExpression("^[A-Za-z0-9]+$", ErrorMessage = "[密码]格式不正确！")]  
    53.         /// <summary>  
    54.         ///   
    55.         /// </summary>  
    56.         public string Pass  
    57.         {  
    58.             get { return _Pass; }  
    59.             set  
    60.             {  
    61.                 //if (string.IsNullOrEmpty(value))  
    62.                 //{  
    63.                 //    throw new Exception("密码不能为空.");  
    64.                 //}  
    65.                 _Pass = value;  
    66.                 NotifyPropertyChange("Pass");  
    67.             }  
    68.         }  
    69.   
    70.     }  
    71. }  

    ValidationUtility.cs

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    1. using System;  
    2. using System.Collections.Generic;  
    3. using System.Linq;  
    4. using System.Text;  
    5. using System.ComponentModel;  
    6. using System.Reflection;  
    7. using System.ComponentModel.DataAnnotations;  
    8.   
    9. namespace WpfApplication11111  
    10. {  
    11.     public class ValidationUtility : IDataErrorInfo  
    12.     {  
    13.         public string Error  
    14.         {  
    15.             get { return _error; }  
    16.         }  
    17.   
    18.         public string _error;  
    19.   
    20.         public string this[string columnName]  
    21.         {  
    22.             get  
    23.             {  
    24.                 Type tp = this.GetType();  
    25.                 PropertyInfo pi = tp.GetProperty(columnName);  
    26.                 var value = pi.GetValue(this, null);  
    27.                 object[] Attributes = pi.GetCustomAttributes(false);  
    28.                 if (Attributes != null && Attributes.Length > 0)  
    29.                 {  
    30.                     foreach (object attribute in Attributes)  
    31.                     {  
    32.                         if (attribute is ValidationAttribute)  
    33.                         {  
    34.                             ValidationAttribute vAttribute = attribute as ValidationAttribute;  
    35.                             if (!vAttribute.IsValid(value))  
    36.                             {  
    37.                                 _error = vAttribute.ErrorMessage;  
    38.                                 return _error;  
    39.                             }  
    40.                         }  
    41.                     }  
    42.                 }  
    43.                 return null;  
    44.             }  
    45.         }  
    46.     }  
    47. }  

    追加PasswordBox验证

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      1. <Style TargetType="{x:Type PasswordBox}">  
      2.         <Setter Property="Validation.ErrorTemplate" Value="{StaticResource validationTemplate}" />  
      3.         <Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.ControlTextBrushKey}}"/>  
      4.         <Setter Property="Background" Value="{DynamicResource {x:Static SystemColors.WindowBrushKey}}"/>  
      5.         <Setter Property="BorderBrush" Value="{StaticResource TextBoxBorder}"/>  
      6.         <Setter Property="FontFamily" Value="Times New Roman"/>  
      7.         <Setter Property="PasswordChar" Value="●"/>  
      8.         <Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.ControlTextBrushKey}}"/>  
      9.         <Setter Property="KeyboardNavigation.TabNavigation" Value="None"/>  
      10.         <Setter Property="BorderThickness" Value="1"/>  
      11.         <Setter Property="HorizontalContentAlignment" Value="Left"/>  
      12.         <Setter Property="Padding" Value="1"/>  
      13.         <Setter Property="FocusVisualStyle" Value="{x:Null}"/>  
      14.         <Setter Property="AllowDrop" Value="true"/>  
      15.         <Setter Property="Template">  
      16.             <Setter.Value>  
      17.                 <ControlTemplate TargetType="{x:Type PasswordBox}">  
      18.                     <Grid x:Name="root">  
      19.                         <Grid.ColumnDefinitions>  
      20.                             <ColumnDefinition Width="*"/>  
      21.                             <ColumnDefinition Width="1"/>  
      22.                         </Grid.ColumnDefinitions>  
      23.                         <!--<Border x:Name="Border" Background="White" BorderBrush="Gray" BorderThickness="0" Padding="2" CornerRadius="1">-->  
      24.                             <Microsoft_Windows_Themes:ListBoxChrome x:Name="Bd" SnapsToDevicePixels="true" Background="{TemplateBinding Background}" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" RenderFocused="{TemplateBinding IsKeyboardFocusWithin}" RenderMouseOver="{TemplateBinding IsMouseOver}">  
      25.                                 <ScrollViewer x:Name="PART_ContentHost" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/>  
      26.                             </Microsoft_Windows_Themes:ListBoxChrome>  
      27.                         <!--</Border>-->  
      28.                         <Border x:Name="border"  BorderBrush="#FFDB000C" BorderThickness="1" CornerRadius="1" Visibility="Collapsed"  HorizontalAlignment="Stretch" Margin="0" Width="Auto">  
      29.   
      30.                             <Grid Background="Transparent" HorizontalAlignment="Right" Height="12" Margin="1,-4,-4,0" VerticalAlignment="Top" Width="12">  
      31.                                 <Path Data="M 1,0 L6,0 A 2,2 90 0 1 8,2 L8,7 z" Fill="#FFDC000C" Margin="1,3,0,0"/>  
      32.                                 <Path Data="M 0,0 L2,0 L 8,6 L8,8" Fill="#ffffff" Margin="1,3,0,0"/>  
      33.                             </Grid>  
      34.                         </Border>  
      35.                         <Popup x:Name="popup" Placement="Right" IsOpen="False">  
      36.                             <Border x:Name="border1_Copy" Width="Auto" Height="Auto" Background="Red" BorderThickness="0" >  
      37.                                 <TextBlock TextWrapping="NoWrap" Text="{Binding (Validation.Errors)[0].ErrorContent, RelativeSource={RelativeSource TemplatedParent}}" HorizontalAlignment="Center" VerticalAlignment="Center" Foreground="White"/>  
      38.                             </Border>  
      39.                         </Popup>  
      40.                     </Grid>  
      41.                     <ControlTemplate.Triggers>  
      42.                         <Trigger Property="Validation.HasError" Value="True">  
      43.                             <Setter Property="Visibility" TargetName="border" Value="Visible"/>  
      44.                         </Trigger>  
      45.                         <MultiTrigger>  
      46.                             <MultiTrigger.Conditions>  
      47.                                 <Condition Property="Validation.HasError" Value="True"/>  
      48.                                 <Condition Property="IsFocused" Value="True"/>  
      49.                             </MultiTrigger.Conditions>  
      50.                             <Setter Property="IsOpen" TargetName="popup" Value="True"/>  
      51.                         </MultiTrigger>  
      52.                     </ControlTemplate.Triggers>  
      53.                 </ControlTemplate>  
      54.             </Setter.Value>  
      55.         </Setter>  
      56.     </Style> 

      57. 代码下载地址：

        http://download.csdn.net/detail/hwt0101/5070730
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  • 原文地址：https://www.cnblogs.com/sjqq/p/7826074.html
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