在XAML中向DataGrid添加行详细信息

时间:2016-04-26 20:57:15

标签: c# xaml datagrid datatemplate rowdetails

我创建了一个wpf DataGrid,它从文件名列表及其分数中调用。 网格工作正常,现在我试图让用户可以点击一行,它显示文件内容本身(文本文件)。 文本字符串非常大,因此我不希望它成为列表的属性。相反,我希望文件路径成为属性,只要我点击一行,流转化器就会读取文件。

我在c#中编码。到目前为止,这是我的(部分)代码:

public class DataLeakageScorer
{
    public string fileName { get; set; }
    public string score { get; set; }
    public string path { get; set; }

    public DataLeakageScorer(string fileName, string score, string path)
    {
        this.fileName = fileName;
        this.score = score;
        this.path = path;
    }
}

和我的XAML:

<Grid>
    <Button x:Name="button" Content="Browse" HorizontalAlignment="Left" Margin="464,22,0,0" VerticalAlignment="Top" Width="75" Click="browse"/>
    <Label x:Name="status" Content="Please select a folder" FontSize="15" HorizontalContentAlignment="Center" VerticalContentAlignment="Center" HorizontalAlignment="Center" Margin="0,5,121,0" VerticalAlignment="Top" Width="459" Height="52"/>
    <DataGrid Name="scoresTable" AutoGenerateColumns="False" IsReadOnly="True" CanUserSortColumns="False" Margin="0,62,0,0">
        <DataGrid.Columns>
            <DataGridTextColumn Header="File Name" Binding="{Binding fileName}"/>
            <DataGridTextColumn Header="Score" Binding="{Binding score}"/>
        </DataGrid.Columns>
    </DataGrid>
</Grid>

如果我不够清楚,谢谢你,对不起

1 个答案:

答案 0 :(得分:0)

Here you have the answer.行详细信息是博客上你需要的东西吗?首先,您必须创建一个附加到DataGrid的自定义行为。我们称之为ReadFileBehavior。

它应该在将自身附加到DataGrid时订阅RowDetailsVisibilityChanged事件。

public class ReadFileBehavior : Behavior<DataGrid>
{
    protected override void OnAttached()
    {
        base.OnAttached();
        this.AssociatedObject.RowDetailsVisibilityChanged += OnRowDetailsVisibilityChanged;
    }

    protected override void OnDetaching()
    {
        base.OnDetaching();
        this.AssociatedObject.RowDetailsVisibilityChanged -= OnRowDetailsVisibilityChanged;
    }

    private void OnRowDetailsVisibilityChanged(object sender, DataGridRowDetailsEventArgs e)
    {
        var element = e.DetailsElement as TextBlock;
        element.Text = File.ReadAllLines((element.DataContext as DataLeakageScorer).Path);
    }
}

您可以在XAML中将行为添加到DataGrid:

        <DataGrid ItemsSource="{Binding Customers}">
            <Interactivity:Interaction.Behaviors>
                <customBehaviors:ReadFileBehavior />
            </Interactivity:Interaction.Behaviors>
            <DataGrid.Columns>
                <DataGridTextColumn Header="First Name" Binding="{Binding FirstName}" />
            </DataGrid.Columns>
            <DataGrid.RowDetailsTemplate>
                <DataTemplate>
                    <TextBlock />
                </DataTemplate>
            </DataGrid.RowDetailsTemplate>
        </DataGrid>

我还没有测试过这个解决方案,但可能需要将BindableBase继承添加到DataLeakageScorer(或实现INotifyPropertyChanged),因为您可能无权访问TextBlock.Text属性。比你只做这样的事情:

    private void OnRowDetailsVisibilityChanged(object sender, DataGridRowDetailsEventArgs e)
    {
        var context = e.DetailsElement.DataContext as DataLeakageScorer
        context.Score = File.ReadAllLines(context.Path);
    }