如何从控件中弹出类字段？

Question

我有自己的用户控件。这个控件的代码：

<StackPanel>
    <TextBlock Text="{Binding Login}" Margin="0,18,0,0" HorizontalAlignment="Center" FontWeight="Bold"/>
    <TextBlock Text="{Binding Address}" HorizontalAlignment="Center" />
</StackPanel>
</Border>
<Button Name="watchBut" Grid.Row="1" Style="{StaticResource RoundButtonTemplate}" Margin="5,0,5,5" FontSize="15" Content="Watch" Click="watchBut_Click"/>

我创建它来制作这些控件的网格，它看起来像这样：

此网格是ItemsControl。它的代码：

<ItemsControl Name="items" Margin="5,-5,5,5" Grid.Column="1" Grid.Row="1">
    <ItemsControl.ItemTemplate>
        <DataTemplate>
            <local:MyControl />
        </DataTemplate>
    </ItemsControl.ItemTemplate>
    <ItemsControl.ItemsPanel>
        <ItemsPanelTemplate>
            <WrapPanel />
        </ItemsPanelTemplate>
    </ItemsControl.ItemsPanel>
</ItemsControl>

在代码中，这个ItemsControl被绑定到我的类对象的List。我的班级：

class MyItem
{
    public int Id { set; get; }
    public string Login { set; get; }
    public string Address { set; get; }

    public MyItem(int Id, string Login, string Address)
    {
        this.Id = Id;
        this.Login = Login;
        this.Address = Address;
    }
}

如何填充：

List<MyItem> Computers = new List<MyItem>
{
    new MyItem(0,"08739","10.3.0.9"),
    new MyItem(1,"08813","10.3.0.11"),
    new MyItem(2,"09832","10.3.0.14"),
    new MyItem(3,"09854","10.3.0.12"),
    new MyItem(4,"09984","10.3.0.17"),
    new MyItem(5,"proskurin","10.3.0.1"),
    new MyItem(6,"karavaev","10.3.0.2"),
    new MyItem(7,"deba","10.3.0.13")
};
items.ItemsSource = Computers;

我想通过单击此矩形下的“Watch”按钮获取MyItem类对象信息（例如，“09984”，“10.3.0.17”）。像这样：

Answer 1

void watchBut_Click(object sender, RoutedEventArgs e)
{
    var myItem = ((Button)sender).DataContext as MyItem;

    //  Do stuff
}

您可以改为give MyItem a property that returns a Command并将datacontext作为命令参数发送：

<Button 
    Name="watchBut" 
    Grid.Row="1" 
    Style="{StaticResource RoundButtonTemplate}" 
    Margin="5,0,5,5" 
    FontSize="15" 
    Content="Watch" 
    Command="{Binding WatchCommand}"
    CommandParameter="{Binding}"
    />

没有Path的绑定只是将DataContext本身（在这种情况下为MyItem的实例）绑定到属性。这是“更好”，更纯粹的MVVM解决方案，但你不是在这里做非常纯粹的MVVM而且事件处理程序不是致命的罪。