WPF datagridrow isreadonly binding to id include converter and mvvm

<Window.Resources>
    <local:IdToEnableConverter x:Key="IdToEnableConverter"/>
    <local:DgRowBgColorConverter x:Key="DgRowBgColorConverter"/>
    <Style x:Key="EditableCellStyle" TargetType="{x:Type TextBox}">
        <Setter Property="Background"  Value="Cyan"/>
        <Setter Property="IsReadOnly" Value="False"/>
        <Style.Triggers>
            <DataTrigger Binding="{Binding Id,Converter={StaticResource IdToEnableConverter}}"
                  Value="False">
                <Setter Property="Background" Value="Gray"/>
                <Setter Property="IsReadOnly" Value="True"/>
            </DataTrigger>
        </Style.Triggers>
    </Style>
</Window.Resources>


 <DataGridTextColumn Header="Id"
                     Binding="{Binding Id}" IsReadOnly="True"/>
 <DataGridTextColumn Header="Name"
                     Binding="{Binding Name}" 
                     EditingElementStyle="{StaticResource EditableCellStyle}"/>

 

 

 

 

 

 

 

 

 

 

 

//xaml
<Window x:Class="WpfApp30.MainWindow"        
        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:WpfApp30"
        WindowState="Maximized"
        mc:Ignorable="d"
        Title="MainWindow" Height="450" Width="800">
    <Window.Resources>
        <local:IdToEnableConverter x:Key="IdToEnableConverter"/>
        <local:DgRowBgColorConverter x:Key="DgRowBgColorConverter"/>
        <Style x:Key="EditableCellStyle" TargetType="{x:Type TextBox}">
            <Setter Property="Background"  Value="Cyan"/>
            <Setter Property="IsReadOnly" Value="False"/>
            <Style.Triggers>
                <DataTrigger Binding="{Binding Id,Converter={StaticResource IdToEnableConverter}}"
                      Value="False">
                    <Setter Property="Background" Value="Gray"/>
                    <Setter Property="IsReadOnly" Value="True"/>
                </DataTrigger>
            </Style.Triggers>
        </Style>
    </Window.Resources>
    <Grid>
        <DataGrid 
             ItemsSource="{Binding BooksList,Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}"
             VirtualizingPanel.IsVirtualizing="True"
             AutoGenerateColumns="False">
            <DataGrid.RowStyle>
                <Style TargetType="{x:Type DataGridRow}">
                    <Setter Property="Height" Value="100"/>
                    <Setter Property="FontSize" Value="50"/>
                    <Setter Property="Background"  Value="Wheat"/>
                    <Style.Triggers>
                        <DataTrigger Binding="{Binding Id,Converter={StaticResource DgRowBgColorConverter}}" Value="Blue" >
                            <Setter Property="Background" Value="Blue"/>
                        </DataTrigger>
                    </Style.Triggers>
                </Style>
            </DataGrid.RowStyle>
            <DataGrid.Columns>
                <DataGridTextColumn Header="Id"
                                    Binding="{Binding Id}" IsReadOnly="True"/>
                <DataGridTextColumn Header="Name"
                                    Binding="{Binding Name}" 
                                    EditingElementStyle="{StaticResource EditableCellStyle}"/>
                <DataGridTextColumn Header="Comment"
                                    Binding="{Binding Comment}"
                                    EditingElementStyle="{StaticResource EditableCellStyle}"/>
                <DataGridTextColumn Header="ISBN"
                                    Binding="{Binding ISBN}"
                                    EditingElementStyle="{StaticResource EditableCellStyle}"/>
                <DataGridTextColumn Header="Title"
                                    Binding="{Binding Title}"
                                    EditingElementStyle="{StaticResource EditableCellStyle}"/>
                <DataGridTextColumn Header="Topic"
                                    Binding="{Binding Topic}"
                                    EditingElementStyle="{StaticResource EditableCellStyle}"/>
                <DataGridTextColumn Header="Summary"
                                    Binding="{Binding Summary}"
                                    EditingElementStyle="{StaticResource EditableCellStyle}"/>
            </DataGrid.Columns>
        </DataGrid>
    </Grid>
</Window>


using System.Collections.ObjectModel;
using System.ComponentModel;
using System.Globalization;
using System.Runtime.CompilerServices;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

namespace WpfApp30
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
            MainVM vm = new MainVM();
            this.DataContext = vm;
        }
    }

    public class MainVM : INotifyPropertyChanged
    {
        public MainVM()
        {
            InitBooks();
        }

        private void InitBooks()
        {
            BooksList = new ObservableCollection<Book>();
            for(int i=0;i<10000;i++)
            {
                BooksList.Add(new Book()
                {
                    Id = i + 1,
                    Name = $"Name_{i + 1}",
                    ISBN = $"ISBN_{Guid.NewGuid().ToString("N")}",
                    Title=$"Title_{i+1}",
                    Comment=$"Comment_{i+1}",
                    Summary=$"Summary_{i+1}",
                    Topic=$"Topic_{i+1}"
                });
            }
        }

        public event PropertyChangedEventHandler? PropertyChanged;
        private void OnPropertyChanged([CallerMemberName] string propertyName = "")
        {
            var handler = PropertyChanged;
            if (handler != null)
            {
                handler?.Invoke(this, new PropertyChangedEventArgs(propertyName));
            }
        }

        private ObservableCollection<Book> booksList;
        public ObservableCollection<Book> BooksList
        {
            get
            {
                return booksList;
            }
            set
            {
                if (value != booksList)
                {
                    booksList = value;
                    OnPropertyChanged();
                }
            }
        }
    }

    public class Book
    {
        public int Id { get; set; }
        public string Name { get; set; }
        public string ISBN { get; set; }
        public string Title { get; set; }
        public string Topic { get; set; }
        public string Summary { get; set; }
        public string Comment { get; set; }

    }

    public class IdToEnableConverter : IValueConverter
    {
        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
            double dValue;
            if (double.TryParse(value?.ToString(), out dValue))
            {
                return dValue % 5 == 0;
            }
            return false;
        }

        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
        {
            throw new NotImplementedException();
        }
    }

    public class DgRowBgColorConverter : IValueConverter
    {
        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
            double dValue;
            if (double.TryParse(value?.ToString(), out dValue))
            {
                return dValue % 5 == 0?Brushes.Blue : Brushes.Gray;
            }
            return Brushes.Gray;
        }

        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
        {
            throw new NotImplementedException();
        }
    }
}

 

posted @ 2025-06-02 19:24  FredGrit  阅读(9)  评论(0)    收藏  举报