Question

我在ControlTemplate属性中有一个Page.Resources：

<ControlTemplate x:Key="validationErrorTemplate">
        <DockPanel>
            <StackPanel Orientation="Horizontal" DockPanel.Dock="Top">
                <Grid Width="12" Height="12">
                    <Ellipse Width="12" Height="12"
                             Fill="Red" HorizontalAlignment="Center"
                             VerticalAlignment="Center"/>
                    <TextBlock Foreground="White" FontWeight="Bold" 
                               FontSize="8" HorizontalAlignment="Center"
                               VerticalAlignment="Center" TextAlignment="Center"
                               ToolTip="{Binding ElementName=ErrorAdorner, Path=AdornedElement.(Validation.Errors)[0].ErrorContent}">X</TextBlock>
                </Grid>
                <TextBlock Foreground="Red" FontWeight="12" Margin="2,0,0,0"
                           Text="{Binding ElementName=ErrorAdorner, Path=AdornedElement.(Validation.Errors)[0].ErrorContent}"/>
            </StackPanel>
            <AdornedElementPlaceholder x:Name="ErrorAdorner"/>
        </DockPanel>
</ControlTemplate>

我用于一个TextBox控件的模板：

<TextBox Name="txtUserName"
             Grid.Row="2" Grid.Column="2" 
             Margin="0,5,0,5"
             VerticalContentAlignment="Center"
             Validation.ErrorTemplate="{StaticResource validationErrorTemplate}">
        <TextBox.Text>
            <Binding Path="Name" Mode="TwoWay"
                     UpdateSourceTrigger="LostFocus">
                <Binding.ValidationRules>
                    <validators:UserNameValidator/>
                </Binding.ValidationRules>
            </Binding>
        </TextBox.Text>
</TextBox>

我还写了一个自定义验证器：

using System.Windows.Controls;

namespace PolovniDijelovi.Validators.LogIn
{
    class UserNameValidator : ValidationRule
    {

        public override ValidationResult Validate(object value, System.Globalization.CultureInfo cultureInfo)
        {
            if (value.ToString() == string.Empty)
            {
                 return new ValidationResult(false, "Korisničko ime ne može biti prazno.");
            }
            else if (value.ToString().Length > 12)
            {
                return new ValidationResult(false, "Korisničko ime ne može sadržati više od 12 znakova.");
            }
            return ValidationResult.ValidResult;
        }
    }
}

毕竟它不起作用。当我在UserNameValidator类中设置断点时，它永远不会达到该断点。

我是初学者，但我无法找到解决方案。请帮忙。

Answer 1

尝试以下方式并扩展您的style＆＃34;视觉效果＆＃34;你喜欢的方式。

有一个包含validation template和<TextBox Name="textBox1" Validation.ErrorTemplate="{StaticResource validationTemplate}" Style="{StaticResource textBoxInError}" Grid.Row="1" Grid.Column="1" Margin="2"> <TextBox.Text> <Binding Path="Name" UpdateSourceTrigger="LostFocus" > <Binding.ValidationRules> <validators:UserNameValidator/> </Binding.ValidationRules> </Binding> </TextBox.Text> </TextBox>

的文本框

control template

为ErrorTemplate：

创建

<ControlTemplate x:Key="validationTemplate">
   <DockPanel>
          <Ellipse Width="12" Height="12"
                 Fill="Red" HorizontalAlignment="Center"
                 VerticalAlignment="Center"/>
        <AdornedElementPlaceholder/>
    </DockPanel>
</ControlTemplate>

style

使用工具提示为错误内容创建文本框<Style x:Key="textBoxInError" 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> </Style>：请注意，只要存在通过触发器设置的错误，就会设置工具提示。

{{1}}

WPF - XAML不会调用自定义验证器

1 个答案: