WPF DataGrid 动态样式

Posted 2023-05-08

【中文标题】WPF DataGrid 动态样式

【英文标题】：WPF DataGrid Dynamic Styling

【发布时间】：2010-08-14 12:39:50

【问题描述】：

我在 WPF 应用程序中有一个 DataGrid 控件。我希望能够在运行时从组合框中选择一个值，单击一个按钮并突出显示 DataGrid 中满足此条件的所有行的背景颜色。这在 Windows 窗体中的代码中很容易做到，但我无法在 WPF 中弄清楚。

感谢您的任何帮助。 谢谢

【参考方案1】：

您好，我创建了一个示例，它通过使用触发器和 valueconverter 来解决这个问题。 基本上，我在网格单元上有一个触发器，它绑定到组合框的选定项。当您更改选择时，触发器会触发，并且单元格使用 valueconverter 来查看所选项目是否与网格单元格的值相同。

MainWindow.xaml

<Window x:Class="ComboBoxFilter.MainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:ComboBoxFilter="clr-namespace:ComboBoxFilter" Title="MainWindow" Height="350" Width="525">
<Window.Resources>
    <ComboBoxFilter:NameValueConverter x:Key="NameValueConverter" />
</Window.Resources>
<Grid>
    <StackPanel>
        <ComboBox ItemsSource="Binding Names" SelectedItem="Binding SelectedPerson, Mode=TwoWay" x:Name="TheComboBox" />
        <DataGrid AutoGenerateColumns="True" ItemsSource="Binding Names" x:Name="DataGrid"  >
            <DataGrid.CellStyle>
                <Style TargetType="x:Type DataGridCell">
                    <Style.Triggers>
                        <DataTrigger Value="True" >
                            <DataTrigger.Binding>
                                <MultiBinding Converter="StaticResource NameValueConverter">
                                    <Binding Path="SelectedItem.Name" ElementName="TheComboBox" Mode="TwoWay" />
                                    <Binding Path="Name"  />                                        
                                </MultiBinding>
                            </DataTrigger.Binding>
                            <Setter Property="Background" Value="Green" />
                        </DataTrigger>
                    </Style.Triggers>
                </Style>
            </DataGrid.CellStyle>
        </DataGrid>
    </StackPanel>
</Grid>

MainWindow 代码隐藏文件

namespace ComboBoxFilter

    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    
        public MainWindow()
        
            InitializeComponent();
            DataContext = new ViewModel();
        

    

名称值转换器

using System;
using System.Collections.Generic;
using System.Globalization;
using System.Linq;
using System.Text;
using System.Windows.Data;

namespace ComboBoxFilter

    public class NameValueConverter : IMultiValueConverter
    
        public object Convert(object[] values, Type targetType, object parameter, CultureInfo culture)
        
            var string1 = values[0];
            var string2 = values[1];
            return string1 == string2;
        

        public object[] ConvertBack(object value, Type[] targetTypes, object parameter, CultureInfo culture)
        
            throw new NotImplementedException();
        
    

视图模型

using System.Collections.ObjectModel;
using System.ComponentModel;

namespace ComboBoxFilter

    public class ViewModel : INotifyPropertyChanged
    
        public ViewModel()
        
            Names = new ObservableCollection<Person>
                        
                            new Person Name = "Andy",
                            new Person Name = "hkon",
                            new Person Name = "dandy",
                            new Person Name = "Andy"
                        ;
        

        private Person _selectedPerson;
        public Person SelectedPerson
        
            get  return _selectedPerson; 
            set  _selectedPerson = value; NotifyPropertyChanged("SelectedPerson"); 
        

        public ObservableCollection<Person> Names  get; set; 

        public event PropertyChangedEventHandler PropertyChanged;
        public void NotifyPropertyChanged(string propertyName)
        
            if (PropertyChanged != null)
            
                PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
            
        
    
    public class Person
    
        public string Name  get; set; 

        public override string ToString()
        
            return Name;