WPF MVVM Tabconrol 突出显示带有验证错误的选项卡

Question

我正在使用 WPF MVVM 模式。我有一个 TabControl，上面有多个选项卡 所有这些选项卡都使用相同的视图模型。所有验证都正常工作，正如您在附件中看到的那样，我在侧面列表视图中显示了所有验证错误。 这是我的 xaml 代码：

 <TabControl  Grid.Row="2" Grid.Column="0" VerticalAlignment="Top" SelectedIndex="{Binding SelectedTabIndex}"
            DisplayMemberPath="Content" DropDownDisplayMode="Visible" ScrollMode="Item" BorderThickness="0">
        <TabItem  Header="Job Config"  DropDownContent="Job Config" >

            <TabItem.Content>
                <ScrollViewer  HorizontalScrollBarVisibility="Auto" VerticalScrollBarVisibility="Auto">
                    <local:JobGroupsCars DataContext="{Binding}" Margin="10" IsEnabled="{Binding Job.IsNotInEditMode ,Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}" />
                </ScrollViewer>
            </TabItem.Content>
        </TabItem>
        <TabItem DropDownContent="Job Info" Header="Job Info">
            <TabItem.Content>
                <ScrollViewer  HorizontalScrollBarVisibility="Auto" VerticalScrollBarVisibility="Auto">
                    <local:JobDetailView DataContext="{Binding}" Margin="10" IsEnabled="{Binding Job.IsNotInEditMode ,Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}"/>
                </ScrollViewer>
            </TabItem.Content>
        </TabItem>
        <TabItem DropDownContent="Shipping" Header="Shipping Details">
            <TabItem.Content>
                <ScrollViewer HorizontalScrollBarVisibility="Auto" VerticalScrollBarVisibility="Auto">
                    <local:JobShippingView DataContext="{Binding}" Margin="10" IsEnabled="{Binding Job.IsNotInEditMode ,Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}"/>
                </ScrollViewer>
            </TabItem.Content>
        </TabItem>
        <TabItem DropDownContent="Controller" Header="Controller">
            <TabItem.Content>
                <ScrollViewer HorizontalScrollBarVisibility="Auto" VerticalScrollBarVisibility="Auto">
                    <local:ControllerView DataContext="{Binding}" Margin="10" IsEnabled="{Binding Job.IsNotInEditMode ,Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}"/>
                </ScrollViewer>
            </TabItem.Content>
        </TabItem>

        <TabItem DropDownContent="Ac Motor and Brakes" Header="AC Motor and Brakes" >
            <TabItem.Content>
                <ScrollViewer  HorizontalScrollBarVisibility="Auto" VerticalScrollBarVisibility="Auto">
                    <local:ACMotorView DataContext="{Binding}" Margin="10" IsEnabled="{Binding Job.IsNotInEditMode ,Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}"/>
                </ScrollViewer>
            </TabItem.Content>
        </TabItem>
    </TabControl>

我的任务是当我单击右侧面板中的按钮时，它必须导航到出现此验证错误的选项卡。

如有任何帮助，我们将不胜感激。

Answer 1

我不知道有什么合适的方法来实现这一点 但是从您长期以来一直在寻找解决方案的事实来看，我为您破解了一些可怕的东西，这将起到作用。 先添加这个类

  public static class UIHelper
    {
        public static T FindChild<T>(this DependencyObject parent, string childName)
        where T : DependencyObject
        {
            if (parent == null) return null;

            T foundChild = null;

            var childrenCount = VisualTreeHelper.GetChildrenCount(parent);
            for (var i = 0; i < childrenCount; i++)
            {
                var child = VisualTreeHelper.GetChild(parent, i);
                var childType = child as T;
                if (childType == null)
                {
                    foundChild = FindChild<T>(child, childName);
                    if (foundChild != null) break;
                }
                else if (!string.IsNullOrEmpty(childName))
                {
                    var frameworkElement = child as FrameworkElement;
                    if (frameworkElement != null && frameworkElement.Name == childName)
                    {
                        foundChild = (T)child;
                        break;
                    }
                }
                else
                {
                    foundChild = (T)child;
                    break;
                }
            }

            return foundChild;
        }
    }

这个类将通过他们的名字找到孩子。我也把它放在一起来代表你的情况：

    <TabControl Name="ImTheTabControl">
        <TabItem Name="ImTheTab">
            <Grid>
                <TextBox Name="ImTheTextbox"></TextBox>
            </Grid>
        </TabItem>
        <TabItem Name="ImNotTheTab"/>
        <TabItem Name="ImNotTheTabEighter"/>
    </TabControl>

现在在您的代码中使用包含错误的控件调用此函数：

         void findPapaTab(Control ctrl)
        {
            foreach (TabItem item in ImTheTabControl.Items)
            {
                if (null != UIHelper.FindChild<TextBox>(item.Content as Grid, ImTheTextbox.Name))
                {
                    MessageBox.Show(item.Name);
                }
            }
        }