Question

我想在特定查询操作中添加一个clickable事件
示例：我有这3个列表Image
当我单击该列表之一时如何添加操作，它会转到我选择并执行某操作的ID

Mydb示例Database
查询

select * from library where id_movie = (the one that i clicked)

Xaml

<ItemsControl ItemsSource="{Binding Path=Library}" Margin="0,0,2,0">
    <ItemsControl.ItemTemplate>
        <DataTemplate DataType="viewModels:Card">
            <UniformGrid Rows="1" Columns="1">
                <StackPanel Orientation="Horizontal" Width="100" Height="150" Margin="10,25,0,0" >
                    <Image Width="100" Source="{Binding Path=cover}"/>
                </StackPanel>
                <StackPanel Orientation="Horizontal" HorizontalAlignment="Center" Margin="10,0,0,0">
                    <Label Content="{Binding Path=title}"/>
                </StackPanel>
            </UniformGrid>
        </DataTemplate>
    </ItemsControl.ItemTemplate>
    <ItemsControl.ItemsPanel>
        <ItemsPanelTemplate>
            <WrapPanel Orientation="Horizontal"/>
        </ItemsPanelTemplate>
    </ItemsControl.ItemsPanel>
</ItemsControl>

MyClass

public class VModel
{
    public VModel()
    {
        DataTable dt = new DataTable();
        DataSet ds = new DataSet();
        using (MySqlConnection connection = new MySqlConnection("SERVER=localhost;" + "DATABASE=library;" + "UID=root;" + "PASSWORD=;"))
        {
            MySqlDataAdapter adapter = new MySqlDataAdapter();
            adapter.SelectCommand = new MySqlCommand("Select * from movie_list", connection);
            adapter.Fill(dt);
        }

        Library = dt.DefaultView;
    }

    public DataView Library { get; private set; }
}

Answer 1

我认为这就是您要寻找的。每个项目都是一个按钮，其中包含图像和标签。单击按钮将调用带有参数的命令（在窗口的DataContext上）。

<ItemsControl.ItemTemplate>
    <DataTemplate DataType="viewModels:Card">
        <Button Command="{Binding DataContext.QueryCommand, RelativeSource={RelativeSource FindAncestor, AncestorType=Window}}" 
                CommandParameter="{Binding Path=id}">
            <StackPanel>
                <Image Width="100" Source="{Binding Path=cover}"/>
                <Label Content="{Binding Path=title}" HorizontalContentAlignment="Center"/>
            <StackPanel>
        </Button>
    </DataTemplate>
</ItemsControl.ItemTemplate>

Answer 2

将Image控件更改为以下代码，它将是Image的按钮。看到Command绑定到全局DataContext，因为在viewmodel中我将声明command。我使用命令参数并在其中传递ID。

<Button Command="{Binding Path=DataContext.DoSomething, RelativeSource={RelativeSource Mode=FindAncestor, AncestorType={x:Type Window}}}" CommandParameter="{Binding id}">
     <StackPanel>
          <Image Width="100" Source="{Binding Path=cover}"/>
     </StackPanel>
</Button>

然后您需要在ViewModel中声明Command

public ICommand DoSomething {get;set;}

并在构造函数中对其进行初始化

DoSomething = new DoSomethingCommand(this);

为定义fo命令添加另一个类

internal class DoSomethingCommand: ICommand
    {
        private VModel vm;

        public PlotPlane(VModel mainViewModel)
        {
            this.vm = mainViewModel;
        }

        public event EventHandler CanExecuteChanged;

        public bool CanExecute(object parameter)
        {
            return true;
        }

        public void Execute(object parameter)
        {

            var id = (id)parameter;

            //do something, use vm to access your viewmodel


        }
    }

在图片上添加点击事件

2 个答案: