Question

我有以下.xaml for DataGrid，并希望在.cs代码中的某些条件下显示/隐藏按钮.xaml代码如下

<DataGridTemplateColumn Header="Action" Width="auto" >
    <DataGridTemplateColumn.CellTemplate>
        <DataTemplate>
            <StackPanel Orientation="Horizontal">
                <Button x:Name="btnConfirm" Content="Confirm" Click="ConfirmButton_Click"  Height="auto" Width="auto"  Opacity="100" Background="Transparent" BorderBrush="Transparent" HorizontalAlignment="Left"/>
                <Button x:Name="btnDecline" Content="Decline" Click="btnDecline_Click" Height="auto" Width="auto"  Opacity="100" Background="Transparent" BorderBrush="Transparent" HorizontalAlignment="Left" />
                <Button x:Name="btnCancel" Content="Cancel" Click="btnCancel_Click" Height="auto" Width="auto"  Opacity="100" Background="Transparent" BorderBrush="Transparent" HorizontalAlignment="Left"/>
            </StackPanel>
        </DataTemplate>
    </DataGridTemplateColumn.CellTemplate>
</DataGridTemplateColumn>

和.cs代码为

foreach (sp_ProcessingJobsResult item in grdUnConfirmJobs.ItemsSource)
{
var row = grdUnConfirmJobs.ItemContainerGenerator.ContainerFromItem(item) as System.Windows.Controls.DataGridRow;
if (item.Status == "Cancellation Requested.")
    {
      //how find control    
    }
}

Answer 1

你必须为此使用Binding。所以，让我们采取快速的方法：

以下是此背后的代码：

<svg width="450" height="450">
    <defs>
        <pattern id="img1" width="100%" height="100%">
            <image xlink:href="http://lorempixel.com/200/200/people/" x="0" y="0" width="200" height="200" />
        </pattern>
        <pattern id="img2" width="100%" height="100%">
            <image xlink:href="http://lorempixel.com/200/200/animals/" x="0" y="0" width="200" height="200" />
        </pattern>
        <pattern id="img3" width="100%" height="100%">
            <image xlink:href="http://lorempixel.com/200/200/abstract/" x="0" y="0" width="200" height="200" />
        </pattern>
        <pattern id="img4" width="100%" height="100%">
            <image xlink:href="http://lorempixel.com/200/200/sports/" x="0" y="0" width="200" height="200"/>
        </pattern>
    </defs>
    <polygon id="path1" points="225,450 300,300 150,300" fill="url(#img1)" />
    <polygon id="path2" points="150,300 225,150 75,150" fill="url(#img2)" />
    <polygon id="path3" points="150,300 300,300 225,150" fill="url(#img3)" />
    <polygon id="path4" points="300,300 375,150 225,150" fill="url(#img4)" />
    <polygon id="path5" points="75,150 150,0 0,0" fill="url(#img1)" />
    <polygon id="path6" points="75,150 225,150 150,0" fill="url(#img2)" />
    <polygon id="path7" points="225,150 300,0 150,0" fill="url(#img3)" />
    <polygon id="path8" points="225,150 375,150 300,0" fill="url(#img4)" />
    <polygon id="path9" points="375,150 450,0 300,0" fill="url(#img1)" />
</svg>

这是我的例子的模型：

public partial class MainWindow : Window
{
    public bool ButtonIsVisible
    {
        get { return (bool)GetValue(ButtonIsVisibleProperty); }
        set { SetValue(ButtonIsVisibleProperty, value); }
    }

    // Using a DependencyProperty as the backing store for ButtonIsVisible.  This enables animation, styling, binding, etc...
    public static readonly DependencyProperty ButtonIsVisibleProperty =
        DependencyProperty.Register("ButtonIsVisible", typeof(bool), typeof(MainWindow), new UIPropertyMetadata(true));

    public ObservableCollection<Person> items { get; set; }

    public MainWindow()
    {
        InitializeComponent();
        items = new ObservableCollection<Person>();
        items.Add(new Person() { Name = "FirstName" });
        items.Add(new Person() { Name = "SecondName" });

        this.DataContext = this;
    }
}

您的可见性不是bool类型，因此我们需要一个转换器：

public class Person : INotifyPropertyChanged
{
    private string _Name;

    public string Name
    {
        get { return _Name; }
        set
        {
            _Name = value;
            PropertyChanged(this, new PropertyChangedEventArgs("Name"));
        }
    }

    public event PropertyChangedEventHandler PropertyChanged = delegate { };
}

以下是整个XAML代码：

public class BoolToVis : IValueConverter
{
    public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
    {
        var isVisible = (bool)value;

        return isVisible ? Visibility.Visible : Visibility.Hidden;
    }

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

实际上，你会在Buttons Visibility中看到一个奇怪的Binding语法。这是为什么？我假设你不需要在模型中使用这个功能，所以我回到了DataGrid的DataContext，以便达到DependencyProperty。我不完全确定你的情况，但我已经向你展示了一些易于使用的机制。

如何从DataGridTemplateColumn.CellTemplate访问按钮

1 个答案: