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这是我在 xaml 中的代码。我不断收到此错误“在'Grid'类型中找不到可附加属性'Resources'。此外，我还得到本地：AgeValidation - 未找到。你能帮忙吗。谢谢。

<Window x:Class="WpfApplication1.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="MainWindow" Height="350" Width="525">

    <Grid.Resources>
        <Style TargetType="{x:Type TextBox}">
            <Style.Triggers>
                <Trigger Property="Validation.HasError" Value ="true">
                    <Setter Property="ToolTip" 
                      Value="{Binding RelativeSource 
                     ={x:Static RelativeSource.Self},
                      Path= (Validation.Errors)[0].ErrorContent}"/>
                </Trigger>
            </Style.Triggers>
            <Setter Property="Validation.ErrorTemplate">
                <Setter.Value>
                    <ControlTemplate>
                        <DockPanel DockPanel.Dock="Right">
                            <AdornedElementPlaceholder>
                                <Border BorderBrush="Red" BorderThickness="2"/>
                            </AdornedElementPlaceholder>
                            <TextBlock Margin=" 3" Text=" *" Foreground="Red" 
                                       ToolTip="{Binding Path= AdornedElement.ToolTip,
                                                  RelativeSource=
                                                 {RelativeSource Mode=FindAncestor,
                                                 AncestorType={x:Type Adorner}}}"/>
                        </DockPanel>
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
        </Style>
         <Style TargetType="x:Type Button}">
          <Style.Triggers>
            <DataTrigger Binding="Binding ElementName= txtAge,
                         Path= (Validation.HasError)}"
                         Value=" True">
                <Setter Property="IsEnabled" Value=" False"/>
            </DataTrigger>
            <DataTrigger Binding="Binding ElementName= txtFirstName,
                         Path=(Validation.HasError)}"
                         Value=" True">
                <Setter Property="IsEnabled" Value=" False"/>
            </DataTrigger>
            <DataTrigger Binding="Binding ElementName= txtLastName,
                         Path= (Validation.HasError)}"
                         Value=" True">
                <Setter Property="IsEnabled" Value=" False"/>
            </DataTrigger>
        </Style.Triggers>
    </Style>
    <TextBox Name="txtFirstName" Grid.Column=" 1"
             Text="{Binding Path=FirstName,
                            UpdateSourceTrigger=PropertyChanged, 
                            ValidatesOnDataErrors =True}"
             Width="150" Margin=" 5"/>
    <TextBlock Text="Last Name :" Margin=" 10" Grid.Row="1" />
    <TextBox Name="txtLastName" Grid.Column="1"
             Text="Binding Path=LastName,
                           UpdateSourceTrigger=PropertyChanged,
                            ValidatesOnDataErrors=True}"
             Grid.Row="1" Width=" 150" Margin=" 5"/>
    <TextBlock Text="Age : " Margin=" 10" Grid.Row="2" />
    <TextBox Name="txtAge" Grid.Column="1" Grid.Row="2" Width=" 150" Margin="5">
        <TextBox.Text>
            <Binding Path=" Age" UpdateSourceTrigger="PropertyChanged" 
                      ValidatesOnDataErrors="True">
                <Binding.ValidationRules>
                    <local:AgeValidation MinimumAge="1"/>
                </Binding.ValidationRules>
            </Binding>
        </TextBox.Text>
    </TextBox>

    <Button Grid.Column="1" Grid.Row="3"
            Content=" Update" Margin=" 5" HorizontalAlignment="Center" />
</Grid.Resources>

4

1 回答 1

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您应该添加<Grid></Grid>才能在其中插入资源！对于 AgeValidation，请确保验证类是公共的，包含在指定的命名空间中并继承 ValidationRule 类，请参阅此。

 <Grid>
       <Grid.Resources>
            <Style TargetType="{x:Type TextBox}">
                <Style.Triggers>
                    <Trigger Property="Validation.HasError" Value ="true">
                        <Setter Property="ToolTip" 
                          Value="{Binding RelativeSource 
                         ={x:Static RelativeSource.Self},
                          Path= (Validation.Errors)[0].ErrorContent}"/>
                    </Trigger>
                </Style.Triggers>
                <Setter Property="Validation.ErrorTemplate">
                    <Setter.Value>
                        <ControlTemplate>
                            <DockPanel DockPanel.Dock="Right">
                                <AdornedElementPlaceholder>
                                    <Border BorderBrush="Red" BorderThickness="2"/>
                                </AdornedElementPlaceholder>
                                <TextBlock Margin=" 3" Text=" *" Foreground="Red" 
                                           ToolTip="{Binding Path= AdornedElement.ToolTip,
                                                      RelativeSource=
                                                     {RelativeSource Mode=FindAncestor,
                                                     AncestorType={x:Type Adorner}}}"/>
                            </DockPanel>
                        </ControlTemplate>
                    </Setter.Value>
                </Setter>
            </Style>
             <Style TargetType="x:Type Button}">
              <Style.Triggers>
                <DataTrigger Binding="Binding ElementName= txtAge,
                             Path= (Validation.HasError)}"
                             Value=" True">
                    <Setter Property="IsEnabled" Value=" False"/>
                </DataTrigger>
                <DataTrigger Binding="Binding ElementName= txtFirstName,
                             Path=(Validation.HasError)}"
                             Value=" True">
                    <Setter Property="IsEnabled" Value=" False"/>
                </DataTrigger>
                <DataTrigger Binding="Binding ElementName= txtLastName,
                             Path= (Validation.HasError)}"
                             Value=" True">
                    <Setter Property="IsEnabled" Value=" False"/>
                </DataTrigger>
            </Style.Triggers>
        </Style>
        <TextBox Name="txtFirstName" Grid.Column=" 1"
                 Text="{Binding Path=FirstName,
                                UpdateSourceTrigger=PropertyChanged, 
                                ValidatesOnDataErrors =True}"
                 Width="150" Margin=" 5"/>
        <TextBlock Text="Last Name :" Margin=" 10" Grid.Row="1" />
        <TextBox Name="txtLastName" Grid.Column="1"
                 Text="Binding Path=LastName,
                               UpdateSourceTrigger=PropertyChanged,
                                ValidatesOnDataErrors=True}"
                 Grid.Row="1" Width=" 150" Margin=" 5"/>
        <TextBlock Text="Age : " Margin=" 10" Grid.Row="2" />
        <TextBox Name="txtAge" Grid.Column="1" Grid.Row="2" Width=" 150" Margin="5">
            <TextBox.Text>
                <Binding Path=" Age" UpdateSourceTrigger="PropertyChanged" 
                          ValidatesOnDataErrors="True">
                    <Binding.ValidationRules>
                        <local:AgeValidation MinimumAge="1"/>
                    </Binding.ValidationRules>
                </Binding>
            </TextBox.Text>
        </TextBox>
        <Button Grid.Column="1" Grid.Row="3"
                Content=" Update" Margin=" 5" HorizontalAlignment="Center" />
    </Grid.Resources>  </Grid>`
于 2013-01-28T17:07:51.683 回答