Question

如果来自WPF DataGrid的SelectionChanged事件中的条件为真，我想更改整行的颜色。如果我使用arg DataGridRowEventArgs e，我可以更改LoadingRow事件中的颜色。我可以使用e.Row.Background = new SolidColorBrush（Colors.White）。但是这在SelectionChangedEvent中不起作用。如何从DataGrid转换为DataGridRow以使用DataGridRow.Row.Background = new SolidColorBrush（Colors.White）？谢谢你的理解。

    private void grd_SelectionChanged(object sender, SelectionChangedEventArgs e)
     {

         int iIndex = grd.SelectedIndex;
         SolidColorBrush myColor = new SolidColorBrush(Colors.Tomato);

         if (grd.SelectedItem != null)
         {
             // var datagridrow = grd.SelectedItem as DataGridRow; --> dosent'work
             var drw = grd.SelectedItem as DataRowView;



             DataRow row = drw.Row;
             if (Convert.ToBoolean(row["Checkbox"]) == true)
             {
                 row["Checkbox"] = false;
             }
             else
             {
                 row["Checkbox"] = true;    
                 // change the background color of the row too what ever  
                 // white red blue                          
              }
         }
    }

=============================================== =================================

这里是xaml和代码。非常感谢你

MainWindow.xaml.cs

     namespace DataGridBrushRowColor
    {

       public partial class MainWindow : Window
    {
    public MainWindow()
    {
        InitializeComponent();
    }

    private void button1_Click(object sender, RoutedEventArgs e)
    {
        CreateTable myDog = new CreateTable();
        // Lade Daten
        dataGrid1.AutoGenerateColumns = true;

        DataView myView = new DataView(myDog.DogOutput);
        dataGrid1.DataContext = myView;            
    }

    private void dataGrid1_SelectionChanged(object sender, SelectionChangedEventArgs e)
    {
        var rowview = dataGrid1.SelectedItem as DataRowView;
        if (rowview != null)
        { 
            DataRow row = rowview.Row;
            if (Convert.ToBoolean(rowview["Choice"]) == true)
            {
                row["Choice"] = false;
            }
            else
            {
                row["Choice"] = true;
                // Color the whole row red

            }
        }


     }
     }
     }

MainWindow.xaml

     <Window x:Class="DataGridBrushRowColor.MainWindow"
     xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
     Title="MainWindow" Height="350" Width="525">
    <Grid>
    <DataGrid AutoGenerateColumns="False" HorizontalAlignment="Left" Name="dataGrid1" VerticalAlignment="Top" Height="243" Width="503" ItemsSource="{Binding}" SelectionChanged="dataGrid1_SelectionChanged" >

    </DataGrid>
    <Button Content="Button" Height="26" HorizontalAlignment="Left" Margin="12,249,0,0" Name="button1" VerticalAlignment="Top" Width="100" Click="button1_Click" />
</Grid>

CreateTable.cs

    namespace DataGridBrushRowColor
    {
        class CreateTable
        {
            DataTable dtDog;

    public DataTable DogOutput
    {
        get
        {
            return dtDog;
        }
    }


    public CreateTable()
    {
        // Here we create a DataTable with four columns.
        DataTable table = new DataTable();
        table.Columns.Add("Choice", typeof(Boolean));
        table.Columns.Add("Weight", typeof(int));
        table.Columns.Add("Name", typeof(string));
        table.Columns.Add("Breed", typeof(string));
        table.Columns.Add("Date", typeof(DateTime));

        // Here we add five DataRows.            
        table.Rows.Add(false,57, "Koko", "Shar Pei", DateTime.Now);
        table.Rows.Add(false,130, "Fido", "Bullmastiff", DateTime.Now);
        table.Rows.Add(false, 92, "Alex", "Anatolian Shepherd Dog", DateTime.Now);
        table.Rows.Add(false, 25, "Charles", "Cavalier King Charles Spaniel", DateTime.Now);
        table.Rows.Add(false, 7, "Candy", "Yorkshire Terrier", DateTime.Now);
        dtDog = table;


    }

    }
    }

Answer 1

你可以通过使用样式和触发器来实现同样的目的。如下所示。

  <Window.Resources>
        <local:MyColorConverter x:Key="colorconverter" />
        <Style TargetType="{x:Type DataGridRow}">
            <Style.Triggers>
                <Trigger Property="IsSelected" Value="True">
                    <Setter Property="Background" Value="{Binding Converter={StaticResource colorconverter}}" /> 
                 </Trigger>              
            </Style.Triggers>
        </Style>
    </Window.Resources>

..代码背后的变化

WPF DataGrid SelectionChanged行颜色

1 个答案: