C# 在固定位置显示WPF验证错误消息
我运行了WPF验证(在绑定中添加了C# 在固定位置显示WPF验证错误消息,c#,wpf,validation,mvvm,C#,Wpf,Validation,Mvvm,我运行了WPF验证(在绑定中添加了ValidationRules),使用该模板我可以创建漂亮的装饰器。那里有很多帖子 但是我找不到在装饰控件之外的固定位置显示错误消息的方法,例如在窗口一角的TextBlock 我怎样才能做到这一点?我是否可以将所有验证错误消息绑定到我的DataContext(此处为ViewModel) 更新:多亏了一个答案,我让它部分工作。验证消息现在显示在另一个标签中。由于所有文本框及其验证规则都是通过代码动态创建的,因此绑定方式如下: Binding bindSite =
ValidationRules
),使用该模板我可以创建漂亮的装饰器。那里有很多帖子
但是我找不到在装饰控件之外的固定位置显示错误消息的方法,例如在窗口一角的TextBlock
我怎样才能做到这一点?我是否可以将所有验证错误消息绑定到我的DataContext
(此处为ViewModel)
更新:多亏了一个答案,我让它部分工作。验证消息现在显示在另一个标签中。由于所有文本框及其验证规则都是通过代码动态创建的,因此绑定方式如下:
Binding bindSite = new Binding();
bindSite.Source = this.validationErrorDisplayLabel;
BindingOperations.SetBinding(textBox, Validation.ValidationAdornerSiteProperty, bindSite);
但验证消息仅转发到执行此代码的最后一个文本框的AdornorSite
我在这个小例子中再现了这个问题 XAML:
框1
框2
当值等于字符串“a”
时,类规则a
产生验证错误。第二个文本框中的错误显示在文本块中,第一个文本框中的错误不显示(而是使用默认模板并获得红色边框)
这两种方法如何都适用?文本块不需要汇总所有错误,而是显示第一个错误。您可以将
BindingGroup
与Validation.validationadrnersite
和Validation.validationadrnersite for
属性结合使用
向您展示了如何执行此操作的示例
多亏了,我能够用BindingGroup解决这个问题,而不用ValidationAdornerSite
<Window x:Class="BindingAndValidation.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="clr-namespace:BindingAndValidation"
Title="Binding and Validation" Height="110" Width="425"
DataContext="{Binding RelativeSource={RelativeSource Self}}"
>
<Grid x:Name="RootElement">
<Grid.Resources>
<Style TargetType="{x:Type TextBox}">
<Style.Triggers>
<Trigger Property="Validation.HasError" Value="true">
<Setter Property="ToolTip" Value="{Binding RelativeSource={RelativeSource Self}, Path=(Validation.Errors)[0].ErrorContent}" />
</Trigger>
</Style.Triggers>
</Style>
</Grid.Resources>
<Grid.BindingGroup>
<BindingGroup Name="LocalBindingGroup">
<BindingGroup.ValidationRules>
<local:RuleGroup />
</BindingGroup.ValidationRules>
</BindingGroup>
</Grid.BindingGroup>
<TextBox
HorizontalAlignment="Left" Height="23" Margin="10,10,0,0" TextWrapping="Wrap" VerticalAlignment="Top" Width="120" LostFocus="TextBox_LostFocus">
<TextBox.Text>
<Binding>
<Binding.Path>Box1</Binding.Path>
<Binding.BindingGroupName>LocalBindingGroup</Binding.BindingGroupName>
<Binding.ValidationRules>
<local:RuleA />
</Binding.ValidationRules>
</Binding>
</TextBox.Text>
</TextBox>
<TextBox
HorizontalAlignment="Left" Height="23" Margin="10,38,0,0" TextWrapping="Wrap" VerticalAlignment="Top" Width="120">
<TextBox.Text>
<Binding>
<Binding.Path>Box2</Binding.Path>
<Binding.BindingGroupName>LocalBindingGroup</Binding.BindingGroupName>
<Binding.ValidationRules>
<local:RuleA />
</Binding.ValidationRules>
</Binding>
</TextBox.Text>
</TextBox>
<ItemsControl ItemsSource="{Binding Path=(Validation.Errors), ElementName=RootElement}" MinWidth="100" MinHeight="16" Margin="230,10,0,0" Background="AntiqueWhite" Foreground="Red">
<ItemsControl.ItemTemplate>
<DataTemplate>
<Label Foreground="Red" Content="{Binding Path=ErrorContent}"/>
</DataTemplate>
</ItemsControl.ItemTemplate>
</ItemsControl>
<Button Content="Button" HorizontalAlignment="Left" Margin="150,0,0,0" VerticalAlignment="Top" Width="75" Click="Button_Click" />
</Grid>
</Window>
当然,对于更大的项目,附加属性可能会有所帮助。谢谢您的提示!使用
Validation.ValidationAdornerSite
和Validation.ValidationAdornerSite for
我将验证结果传递给另一个控件。但它只针对最后一个文本框中的错误分配了.adornorsite
。我给出了这个答案,因为它帮助了我,尽管我的解决方案有了另一个方向。谢谢请参阅我的最终解决方案的公认答案。谢谢,很高兴我能提供帮助!
<StackPanel x:Name="FormRoot"
Validation.ValidationAdornerSite="{Binding ElementName=ErrorDisplay}">
<FrameworkElement.BindingGroup>
<BindingGroup Name="FormBindingGroup" />
</FrameworkElement.BindingGroup>
<TextBox>
<TextBox.Text>
<Binding BindingGroupName="FormBindingGroup"
UpdateSourceTrigger="LostFocus"
Path="Box1">
<Binding.ValidationRules>
<l:RuleA />
</Binding.ValidationRules>
</Binding>
</TextBox.Text>
</TextBox>
<TextBox>
<TextBox.Text>
<Binding BindingGroupName="FormBindingGroup"
UpdateSourceTrigger="LostFocus"
Path="Box2">
<Binding.ValidationRules>
<l:RuleA />
</Binding.ValidationRules>
</Binding>
</TextBox.Text>
</TextBox>
<ItemsControl x:Name="ErrorDisplay"
Background="AntiqueWhite"
Foreground="Red"
ItemsSource="{Binding RelativeSource={RelativeSource Self},
Path=(Validation.ValidationAdornerSiteFor).(Validation.Errors)}"
DisplayMemberPath="ErrorContent" />
</StackPanel>
ItemsSource="{Binding ElementName=FormRoot, Path=(Validation.Errors)}"
<Window x:Class="BindingAndValidation.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="clr-namespace:BindingAndValidation"
Title="Binding and Validation" Height="110" Width="425"
DataContext="{Binding RelativeSource={RelativeSource Self}}"
>
<Grid x:Name="RootElement">
<Grid.Resources>
<Style TargetType="{x:Type TextBox}">
<Style.Triggers>
<Trigger Property="Validation.HasError" Value="true">
<Setter Property="ToolTip" Value="{Binding RelativeSource={RelativeSource Self}, Path=(Validation.Errors)[0].ErrorContent}" />
</Trigger>
</Style.Triggers>
</Style>
</Grid.Resources>
<Grid.BindingGroup>
<BindingGroup Name="LocalBindingGroup">
<BindingGroup.ValidationRules>
<local:RuleGroup />
</BindingGroup.ValidationRules>
</BindingGroup>
</Grid.BindingGroup>
<TextBox
HorizontalAlignment="Left" Height="23" Margin="10,10,0,0" TextWrapping="Wrap" VerticalAlignment="Top" Width="120" LostFocus="TextBox_LostFocus">
<TextBox.Text>
<Binding>
<Binding.Path>Box1</Binding.Path>
<Binding.BindingGroupName>LocalBindingGroup</Binding.BindingGroupName>
<Binding.ValidationRules>
<local:RuleA />
</Binding.ValidationRules>
</Binding>
</TextBox.Text>
</TextBox>
<TextBox
HorizontalAlignment="Left" Height="23" Margin="10,38,0,0" TextWrapping="Wrap" VerticalAlignment="Top" Width="120">
<TextBox.Text>
<Binding>
<Binding.Path>Box2</Binding.Path>
<Binding.BindingGroupName>LocalBindingGroup</Binding.BindingGroupName>
<Binding.ValidationRules>
<local:RuleA />
</Binding.ValidationRules>
</Binding>
</TextBox.Text>
</TextBox>
<ItemsControl ItemsSource="{Binding Path=(Validation.Errors), ElementName=RootElement}" MinWidth="100" MinHeight="16" Margin="230,10,0,0" Background="AntiqueWhite" Foreground="Red">
<ItemsControl.ItemTemplate>
<DataTemplate>
<Label Foreground="Red" Content="{Binding Path=ErrorContent}"/>
</DataTemplate>
</ItemsControl.ItemTemplate>
</ItemsControl>
<Button Content="Button" HorizontalAlignment="Left" Margin="150,0,0,0" VerticalAlignment="Top" Width="75" Click="Button_Click" />
</Grid>
</Window>
private void TextBox_LostFocus(object sender, RoutedEventArgs e)
{
this.RootElement.BindingGroup.CommitEdit();
}