使按钮在 DataGrid 中可见

Posted 2023-02-22

【中文标题】使按钮在 DataGrid 中可见

【英文标题】：Making a Button Visible in DataGrid

【发布时间】：2012-08-12 16:48:16

【问题描述】：

我在 WPF 中创建了一个 Datagrid 控件。我怎样才能使按钮仅对

可见

我选择它的行，以便我的 Button 将显示在 Button-Column-Cell 中。

XAML:
<DataGridTemplateColumn x:Name="Button-Column" Header="H." Width="50">
  <DataGridTemplateColumn.CellTemplate>
    <DataTemplate>
      <DataTemplate.Triggers>
        <DataTrigger Binding="Binding Path=ObjectType" Value="E">
           <Setter Property="Visibility" Value="Hidden" />
        </DataTrigger>
        <DataTrigger Binding="Binding Path=ObjectType" Value="F">
           <Setter Property="Visibility" Value="Hidden" />
        </DataTrigger>
        <DataTrigger Binding="Binding Path=ObjectType" Value= "P">
            <Setter Property="Visibility" Value="Hidden" />
        </DataTrigger>
      </DataTemplate.Triggers>              
      <Button Name="btnTable" Visibility="Binding Path=ObjectType" Height="20"  
              Width="25" Click="Button_Table_Click">
      </Button>
     </DataTemplate>
    </DataGridTemplateColumn.CellTemplate>
  </DataGridTemplateColumn>

【参考方案1】：

这是使用多重绑定的解决方案：

xaml:

   <Window x:Class="WpfApplication8.MainWindow"
            xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
            xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:WpfApplication8="clr-namespace:WpfApplication8"
            Title="MainWindow" Height="350" Width="525">
        <Window.Resources>
            <WpfApplication8:ButtonVisibilityConverter x:Key="buttonVisibilityConverter"/>
        </Window.Resources>
        <DataGrid x:Name="dataGrid" SelectedItem="Binding MySelectedItem" ItemsSource="Binding MyObjectList" SelectionMode="Single">
            <DataGrid.Columns>
                <DataGridTemplateColumn Header="H." Width="50">
                    <DataGridTemplateColumn.CellTemplate>
                        <DataTemplate>
                            <Button 
                                    Height="20"  
                                    Width="25">
                                <Button.Visibility>
                                    <MultiBinding Converter="StaticResource buttonVisibilityConverter">
                                        <Binding Path="Parent.MySelectedItem"/>
                                        <Binding></Binding>
                                    </MultiBinding>
                                </Button.Visibility>
                            </Button>
                        </DataTemplate>
                    </DataGridTemplateColumn.CellTemplate>
                </DataGridTemplateColumn>
            </DataGrid.Columns>
        </DataGrid>
    </Window>

后面的代码：

namespace WpfApplication8

    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window, INotifyPropertyChanged
    
        #region INotifyPropertyChanged Members

        public event PropertyChangedEventHandler PropertyChanged;

        #endregion

        public class Toto
        
            public object Parent  get; set; 

            public string Name  get; set; 
            public string Content  get; set; 

            public Toto(string name, string content, object parent)
            
                this.Name = name; this.Content = content; this.Parent = parent;
            
        

        private object _mySelectedItem;

        public object MySelectedItem
        
            get  return _mySelectedItem; 
            set
            
                _mySelectedItem = value;
                if (this.PropertyChanged != null)
                
                    this.PropertyChanged(this, new PropertyChangedEventArgs("MySelectedItem"));
                
            
        

        private List<Toto> _myObjectList;

        public List<Toto> MyObjectList
        
            get  return _myObjectList; 
            set  _myObjectList = value; 
        

        public MainWindow()
        
            this.MyObjectList = new List<Toto>
            
                new Toto("toto1", "content toto1", this),
                new Toto("toto2", "content toto2", this)
            ;

            InitializeComponent();

            this.DataContext = this;
        
    

转换器：

class ButtonVisibilityConverter : IMultiValueConverter

    #region IMultiValueConverter Members

    public object Convert(object[] values, Type targetType, object parameter, System.Globalization.CultureInfo culture)
    
        if (values[0] == values[1])
        
            return Visibility.Visible;
        
        else
        
            return Visibility.Hidden;
        
    

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

    #endregion