datagrid 相关问题

具有验证错误样式的 WPF Datagrid 单元格

当出现验证错误时，我尝试更改 DataGridCell（在 WPF 工具包 DataGrid 中）的默认样式。 默认为红色边框。 我怎样才能放置自己的模板？ 谢谢。

MUI 数据网格中的表和过滤器列不同

在“学生详细信息”列中，我想堆叠三列中的数据值：姓名、专业和年份。是否可以做到这一点，同时仍然保持按单个列过滤的能力......

根据表格（DataGrid）的选定行设置按钮（ICommand）的操作

我有一个窗口 WPF 和 2 个表 DataGrid。 DataContext 绑定到类 PersonalTaskClassPickerViewModel.cs。 PersonalTaskClassPicker.xaml 我有一个窗口 WPF 和 2 个表 DataGrid。 DataContext 绑定到类 PersonalTaskClassPickerViewModel.cs。 PersonalTaskClassPicker.xaml <Window x:Class="WpfAppTaskPlanner.PersonalTaskClassPicker" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:viewModels="clr-namespace:WpfAppTaskPlanner.ViewModels" xmlns:views="clr-namespace:WpfAppTaskPlanner" xmlns:taskClassDirectory="clr-namespace:Library.TaskClassDirectory;assembly=Library" mc:Ignorable="d" Title="MainWindow" Height="850" Width="1500" d:DataContext="{d:DesignInstance viewModels:PersonalTaskClassPickerViewModel}"> <Window.Resources> <viewModels:OutputValueConverter x:Key="OutputValueConverter"></viewModels:OutputValueConverter> <DataTemplate x:Key="CustomDataGridHeaderTemplate"> <views:CustomDataGridHeader></views:CustomDataGridHeader> </DataTemplate> </Window.Resources> <DockPanel LastChildFill="True"> <StackPanel Orientation="Horizontal" FlowDirection="RightToLeft" DockPanel.Dock="Bottom"> <!--Other buttons--> <Button HorizontalAlignment="Center" VerticalAlignment="Center" Content="Удалить задачу" Width="100" Height="40" Margin="15 5" Command="{Binding RemoveTaskClassCommand}" CommandParameter="{Binding RelativeSource={RelativeSource AncestorType=Window}}"/> </StackPanel> <StackPanel DockPanel.Dock="Top"> <TextBlock Text="Связанные задачи" Margin="0 5"></TextBlock> <DataGrid x:Name="DataGridRelatedPersonalTaskClass" DockPanel.Dock="Top" ItemsSource="{Binding SelectedTaskPerformerClass.PersonalTaskClassLists.RelatedList, FallbackValue='SelectedTaskPerformerClass не не выбран'}" SelectedItem="{Binding SelectedTaskClass, Mode=TwoWay}"> <DataGrid.Columns> <DataGridTextColumn Header="Участок" HeaderTemplate="{StaticResource CustomDataGridHeaderTemplate}" Binding="{Binding BrigadeIndex}" IsReadOnly="True"/> <!--Other DataGridTextColumns--> </DataGrid.Columns> </DataGrid> <TextBlock Text="Удаленные задачи" Margin="0 5"></TextBlock> <DataGrid x:Name="DataGridDeletedPersonalTaskClass" DockPanel.Dock="Bottom" ItemsSource="{Binding SelectedTaskPerformerClass.PersonalTaskClassLists.DeletedList, FallbackValue='SelectedTaskPerformerClass не не выбран'}" SelectedItem="{Binding SelectedTaskClass, Mode=TwoWay}"> <DataGrid.Columns> <DataGridTextColumn Header="Участок" HeaderTemplate="{StaticResource CustomDataGridHeaderTemplate}" Binding="{Binding BrigadeIndex}" IsReadOnly="True"/> <!--Other DataGridTextColumns--> </DataGrid.Columns> </DataGrid> </StackPanel> </DockPanel> </Window> PersonalTaskClassPicker.xaml.cs public partial class PersonalTaskClassPicker { public PersonalTaskClassPicker(ref TaskPerformerClass selectedTaskPerformerClass) { InitializeComponent(); DataContext = new PersonalTaskClassPickerViewModel(ref selectedTaskPerformerClass); } } PersonalTaskClassPickerViewModel.cs public class PersonalTaskClassPickerViewModel: BaseViewModel { public PersonalTaskClassPickerViewModel(ref TaskPerformerClass selectedTaskPerformerClass) { RemoveTaskClassCommand = new RelayCommand(RemoveTaskClass, CanRemoveTaskClass); // Other ICommand's } } BaseViewModel.cs public class BaseViewModel : BaseNotifyPropertyChanged { private TaskClass? _selectedTaskClass; public TaskClass? SelectedTaskClass { get => _selectedTaskClass; set { if (Equals(value, _selectedTaskClass)) { return; } if (SetField(ref _selectedTaskClass, value)) { CallRaiseCanExecuteChanged(RemoveTaskClassCommand); } } } private TaskPerformerClass? _selectedTaskPerformerClass; public TaskPerformerClass? SelectedTaskPerformerClass { get => _selectedTaskPerformerClass; set { if (_selectedTaskPerformerClass != value) { _selectedTaskPerformerClass = value; OnPropertyChanged(); } } } public ICommand? RemoveTaskClassCommand { get; protected init; } public static void CallRaiseCanExecuteChanged(ICommand? command) { switch (command) { case AsyncRelayCommandWithParameter getToWorkCommand: getToWorkCommand.RaiseCanExecuteChanged(); break; case RelayCommand getToWorkCommand: getToWorkCommand.RaiseCanExecuteChanged(); break; } } protected bool CanRemoveTaskClass(object parameter) { if (parameter is not PersonalTaskClassPicker { DataContext: PersonalTaskClassPickerViewModel personalTaskClassPickerViewModel }) { return false; } if (personalTaskClassPickerViewModel.SelectedTaskPerformerClass is null) { MessageBox.Show("personalTaskClassPickerViewModel.SelectedTaskPerformerClass is null"); } else { var taskPerformer = personalTaskClassPickerViewModel.SelectedTaskPerformerClass; if (SelectedTaskClass is not null && taskPerformer.PersonalTaskClassLists.RelatedList is not null && taskPerformer.PersonalTaskClassLists.RelatedList.Contains(SelectedTaskClass)) { return true; } } return false; } protected void RemoveTaskClass(object parameter) { if (parameter is not PersonalTaskClassPicker { DataContext: PersonalTaskClassPickerViewModel personalTaskClassPickerViewModel }) { return; } if (personalTaskClassPickerViewModel.SelectedTaskPerformerClass is null) { MessageBox.Show("personalTaskClassPickerViewModel.SelectedTaskPerformerClass is null"); } else { var personalTaskClassListsOfTaskPerformerClass = personalTaskClassPickerViewModel.SelectedTaskPerformerClass.PersonalTaskClassLists; var selectedTaskClass = SelectedTaskClass; if (selectedTaskClass is not null && personalTaskClassListsOfTaskPerformerClass.RelatedList is not null && personalTaskClassListsOfTaskPerformerClass.RelatedList.Contains(selectedTaskClass)) { personalTaskClassListsOfTaskPerformerClass.RelatedList.Remove(selectedTaskClass); personalTaskClassListsOfTaskPerformerClass.DeletedList ??= new ObservableCollection<TaskClass>(); personalTaskClassListsOfTaskPerformerClass.DeletedList.Add(selectedTaskClass); personalTaskClassListsOfTaskPerformerClass.OnPropertyChanged( nameof(personalTaskClassListsOfTaskPerformerClass.RelatedList) ); personalTaskClassListsOfTaskPerformerClass.OnPropertyChanged( nameof(personalTaskClassListsOfTaskPerformerClass.DeletedList) ); CallRaiseCanExecuteChanged(RemoveTaskClassCommand); } } } } BaseNotifyPropertyChanged.cs public class BaseNotifyPropertyChanged : INotifyPropertyChanged { public event PropertyChangedEventHandler? PropertyChanged; protected virtual void OnPropertyChanged([CallerMemberName] string? propertyName = null) { PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName)); } protected bool SetField<T>(ref T field, T value, [CallerMemberName] string? propertyName = null) { if (EqualityComparer<T>.Default.Equals(field, value)) { return false; } field = value; OnPropertyChanged(propertyName); return true; } protected class RelayCommand : ICommand { private readonly Action<object> _execute; private readonly Predicate<object>? _canExecute; public RelayCommand(Action<object> execute, Predicate<object>? canExecute = null) { _execute = execute ?? throw new ArgumentNullException(nameof(execute)); _canExecute = canExecute; } public bool CanExecute(object? parameter) => _canExecute == null || _canExecute(parameter ?? "<N/A>"); public void Execute(object? parameter) { _execute(parameter ?? "<N/A>"); } public event EventHandler? CanExecuteChanged { add => CommandManager.RequerySuggested += value; remove => CommandManager.RequerySuggested -= value; } public void RaiseCanExecuteChanged() { CommandManager.InvalidateRequerySuggested(); } } //Other AsyncRelayCommand's } 从主 WPF 窗口调用 WPF 窗口，如下所示： public class MainViewModel : BaseViewModel { //Other code private static void OnEditPersonalTaskClassList(object parameter) { if (parameter is not TaskPerformerClass selectedTaskPerformerClass) { return; } var personalTaskClassEditor = new PersonalTaskClassPicker(ref selectedTaskPerformerClass); if (personalTaskClassEditor.ShowDialog() == true) { //Other commands } else { MessageBox.Show("DataContext закрытого окна не является типом TaskPerformerClass"); } } } TaskPerformerClass.cs namespace Library.TaskPerformerDirectory; public sealed class TaskPerformerClass : INotifyPropertyChanged { //Other private values private PersonalTaskClassCollection _personalTaskClassLists = null!; private TaskPerformerClass() { } public TaskPerformerClass( FullNameOfThePerson fullName, WorkDay workDay, CalendarYearOfTaskPerformer calendarYearOfTaskPerformer, int bitrixEmployeeIndex, List<Department>? bitrixEmployeeDepartmentList = null, TaskClass? actualTask = null ) { //Other initializations of properties PersonalTaskClassLists = new PersonalTaskClassCollection(this); } //Other property public PersonalTaskClassCollection PersonalTaskClassLists { get => _personalTaskClassLists; set { if (Equals(value, _personalTaskClassLists)) { return; } _personalTaskClassLists = value; OnPropertyChanged(); } } public event PropertyChangedEventHandler? PropertyChanged; public void OnPropertyChanged([CallerMemberName] string? propertyName = null) { PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName)); } private bool SetField<T>(ref T field, T value, [CallerMemberName] string? propertyName = null) { if (EqualityComparer<T>.Default.Equals(field, value)) { return false; } field = value; OnPropertyChanged(propertyName); return true; } } PersonalTaskClassCollection.cs public sealed class PersonalTaskClassCollection : INotifyPropertyChanged { private int _id; private int _taskPerformerClassId; private TaskPerformerClass _taskPerformerClass = null!; private ObservableCollection<TaskClass>? _completedList; private ObservableCollection<TaskClass>? _deletedList; private ObservableCollection<TaskClass>? _relatedList; private PersonalTaskClassCollection() { } public PersonalTaskClassCollection(TaskPerformerClass taskPerformerClass) => TaskPerformerClass = taskPerformerClass; public int Id { get => _id; set { if (value == _id) { return; } _id = value; OnPropertyChanged(); } } public int TaskPerformerClassId { get => _taskPerformerClassId; set { if (value == _taskPerformerClassId) { return; } _taskPerformerClassId = value; OnPropertyChanged(); } } public TaskPerformerClass TaskPerformerClass { get => _taskPerformerClass; set { if (Equals(value, _taskPerformerClass)) { return; } _taskPerformerClass = value; OnPropertyChanged(); } } public ObservableCollection<TaskClass>? RelatedList { get => _relatedList; set { if (Equals(value, _relatedList)) { return; } _relatedList = value; OnPropertyChanged(); } } public ObservableCollection<TaskClass>? DeletedList { get => _deletedList; set { if (Equals(value, _deletedList)) { return; } _deletedList = value; OnPropertyChanged(); } } public ObservableCollection<TaskClass>? CompletedList { get => _completedList; set { if (Equals(value, _completedList)) { return; } _completedList = value; OnPropertyChanged(); } } public event PropertyChangedEventHandler? PropertyChanged; public void OnPropertyChanged([CallerMemberName] string? propertyName = null) { PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName)); } private bool SetField<T>(ref T field, T value, [CallerMemberName] string? propertyName = null) { if (EqualityComparer<T>.Default.Equals(field, value)) { return false; } field = value; OnPropertyChanged(propertyName); return true; } } 我认为描述“TaskClass.cs”类没有任何意义。它只是一个包含任务属性的类。 在“DataGridRelatedPersonalTaskClass”和“DataGridDeletedPersonalTaskClass”这两个表中随机选择一行后，“RemoveTaskClassCommand”按钮将永远无法更改“set”属性“SelectedTaskClass”的值。因此，如果单击它，“DataGridRelatedPersonalTaskClass”中下一个突出显示的任务将被删除。 随着时间的推移，我意识到，如果我突出显示表中的每个问题，那么每个“DataGrid”的“SelectedItem”属性将继续处于活动状态，但我的“SelectedTaskClass”属性并不总是更新。尽管“IsMouseOver”属性始终正确显示我最后突出显示的表中的行。 当选择“DataGridRelatedPersonalTaskClass”表中的一行时，我想正确配置“RemoveTaskClassCommand”按钮的活动。怎么办？ 首先，有一个重要的说明。您传递 Window 命令参数 CommandParameter="{Binding RelativeSource={RelativeSource AncestorType=Window}}"。 由于此命令是一个 ViewModel 实体，并且根据 MVVM 规则，禁止将任何 UI 元素传递给 ViewModel，那么您的实现实际上完全破坏了 MVVM 合规性。 关于你问题的本质。 您的任务的可能实现选项之一的最简化示例。 namespace Core2024.SO.Zhan.question79147702 { public class SomeTextItem { private string _title = string.Empty; private string _text = string.Empty; private string _description = string.Empty; public string Title { get => _title; set => _title = value ?? string.Empty; } public string Text { get => _text; set => _text = value ?? string.Empty; } public string Description { get => _description; set => _description = value ?? string.Empty; } } } using Simplified; // This is the space with my implementation of INotifyPropertyChanged and ICommand interfaces. You can use your own implementations instead. using System.Collections.ObjectModel; namespace Core2024.SO.Zhan.question79147702 { public class SomeTextViewModel { private const string data = "After randomly selecting a row in each of the 2 tables \"DataGridRelatedPersonalTaskClass\" and \"DataGridDeletedPersonalTaskClass\", the \"RemoveTaskClassCommand\" button will never be able to change the value of the \"set\" property \"SelectedTaskClass\". Thus, if you click on it, the next highlighted task in the \"DataGridRelatedPersonalTaskClass\" will be deleted. Over time, I realized that if I highlighted each question in the tables, then the \"SelectedItem\" properties of each \"DataGrid\" continue to be active, but my \"SelectedTaskClass\" property is not always updated.Although the \"IsMouseOver\" property always correctly displays the row in which table I highlighted last."; private static IEnumerable<SomeTextItem> GetItems() { string[] split = data.Split(); for (int i = 2; i < split.Length; i+=3) { yield return new SomeTextItem() { Title = split[i-2], Text = split[i-1], Description = split[i] }; } } public SomeTextViewModel() { TextItems = new ObservableCollection<SomeTextItem>(GetItems()); RemoveTextItem = new RelayCommand<SomeTextItem> ( item => TextItems.Remove(item), item => TextItems.Contains(item) ); } public ObservableCollection<SomeTextItem> TextItems { get; } public RelayCommand RemoveTextItem { get; } } } <Window x:Class="Core2024.SO.Zhan.question79147702.SomeTextWindow" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" xmlns:local="clr-namespace:Core2024.SO.Zhan.question79147702" mc:Ignorable="d" Title="SomeTextWindow" Height="450" Width="800" DataContext="{DynamicResource vm}"> <Window.Resources> <local:SomeTextViewModel x:Key="vm"/> </Window.Resources> <Grid> <DataGrid ItemsSource="{Binding TextItems}"> <DataGrid.Columns> <DataGridTemplateColumn> <DataGridTemplateColumn.CellTemplate> <DataTemplate DataType="{x:Type local:SomeTextItem}"> <Button Content="Remove Item" CommandParameter="{Binding Mode=OneWay}" Command="{Binding RemoveTextItem, Mode=OneWay, Source={StaticResource vm}}"/> </DataTemplate> </DataGridTemplateColumn.CellTemplate> </DataGridTemplateColumn> </DataGrid.Columns> </DataGrid> </Grid> </Window>

在 DataGrid 内滚动父容器

我有这个自定义数据网格。我想要实现的是，当用户将鼠标放在 DataGrid 内部（没有最大高度）时，它应该允许滚动整个父组件...

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ASP.NET 端 Datagrid 中数据的动态过滤器

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如何将 WPF DataGrid 绑定到可变数量的列？

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