在包含按钮一个ListView，如何获得点击的一个指数？ [英] In a ListView containing Buttons, how to get Index of the clicked one?

问题描述

我有一个的ListView 只包含按钮。我想要做的是pretty简单，我想有一个被点击按钮的索引。列表的计数从0到100，因此，当用户点击按钮6，我需要这个号码进行处理。

我定义我的的ListView 是这样的：

 ＆LT; ListView控件名称=myListView
          的ItemsSource ={绑定源= {StaticResource的myDataModel}，
          路径= StatusList，
          模式=单向}＆GT;
          ＆LT; ListView.ItemsPanel＆GT;
                ＆LT; ItemsPanelTemplate＆GT;
                    ＆LT; StackPanel的方向=横向＆GT;＆LT; / StackPanel的＆GT;
                ＆LT; / ItemsPanelTemplate＆GT;
          ＆LT; /ListView.ItemsPanel>          ＆LT; ListView.ItemTemplate＆GT;
               ＆LT;＆DataTemplate的GT;
                    ＆LT;按钮模式=单向}
                            点击=Button_Click/＆GT;
                ＆LT; / DataTemplate中＆GT;
           ＆LT; /ListView.ItemTemplate>
 ＆LT; /＆的ListView GT;
 

我最初的想法是创建一个带有ID的自定义按钮，并绑定指数的ID，但我无法弄清楚如何做到这一点。

我试过：

  int类型的= myListView.Items.IndexOf（（（按钮）发送方））;
 

在事件处理中，但它总是返回为0xffffffff
有谁能够告诉我怎么去点击的按钮的索引？

解决方案

这应该工作：

与一个ItemsControl交换的ListView和一个AlternationCount设置为非常高的数目（比清单中的最大计数元件更高）。
做一个命令，并通过当前指数作为参数。<​​/ P>

XAML：

 ＆LT; Window.CommandBindings＆GT;
  ＆LT;的CommandBinding
   命令=选择
   执行=Click_Executed/＆GT;
＆LT; /Window.CommandBindings>＆LT; ItemsControl的AlternationCount =9999NAME =myListView
      的ItemsSource ={绑定源= {StaticResource的myDataModel}，
      路径= StatusList，
      模式=单向}＆GT;
  ＆LT; ItemsControl.ItemsPanel＆GT;
    ＆LT; ItemsPanelTemplate＆GT;
      ＆LT; StackPanel的方向=横向＆GT;＆LT; / StackPanel的＆GT;
    ＆LT; / ItemsPanelTemplate＆GT;
  ＆LT; /ItemsControl.ItemsPanel>  ＆LT; ItemsControl.ItemTemplate＆GT;
    ＆LT;＆DataTemplate的GT;
      ＆LT;按钮命令=选择
                CommandParameter ={绑定路径=（ItemsControl.AlternationIndex）的RelativeSource = {的RelativeSource TemplatedParent}}
                CONTENT ={绑定的RelativeSource = {的RelativeSource模式= TemplatedParent}，路径=（ItemsControl.AlternationIndex）}WIDTH =200HEIGHT =20点击=Button_Click/＆GT;
    ＆LT; / DataTemplate中＆GT;
  ＆LT; /ItemsControl.ItemTemplate>
＆LT; / ItemsControl的＆GT;
 

code背后：

 私人无效Click_Executed（对象发件人，ExecutedRoutedEventArgs E）
{
  MessageBox.Show（索引：+ e.Parameter.ToString（））;
}
 

I have a ListView containing only buttons. What I want to do is pretty simple, I want to have the index of the button that has been clicked. The count of the list varies from 0 to 100, so when the user clicks on button 6, I need this number for processing.

I defined my ListView like this:

<ListView Name="myListView" 
          ItemsSource="{Binding Source={StaticResource myDataModel}, 
          Path=StatusList, 
          Mode=OneWay}">
          <ListView.ItemsPanel>
                <ItemsPanelTemplate>
                    <StackPanel Orientation="Horizontal"></StackPanel>
                </ItemsPanelTemplate>
          </ListView.ItemsPanel>

          <ListView.ItemTemplate>
               <DataTemplate>
                    <Button Mode=OneWay}"  
                            Click="Button_Click"/> 
                </DataTemplate>
           </ListView.ItemTemplate>
 </ListView>

My original idea was to create a custom button with an ID and bind the index to the ID but I can't figure out how to do that.

I tried:

int a = myListView.Items.IndexOf(((Button)sender)); 

inside the event handler, but it always returns 0xffffffff can anybody tell me how to get the index of the clicked button?

解决方案

This should work:

Swap your ListView with an ItemsControl and set an AlternationCount to a very high number (higher than the max count elements in your list). Make a command and pass the current index as a parameter.

XAML:

<Window.CommandBindings>
  <CommandBinding 
   Command="Select" 
   Executed="Click_Executed" />
</Window.CommandBindings>

<ItemsControl AlternationCount="9999" Name="myListView" 
      ItemsSource="{Binding Source={StaticResource myDataModel}, 
      Path=StatusList, 
      Mode=OneWay}">
  <ItemsControl.ItemsPanel>
    <ItemsPanelTemplate>
      <StackPanel Orientation="Horizontal"></StackPanel>
    </ItemsPanelTemplate>
  </ItemsControl.ItemsPanel>

  <ItemsControl.ItemTemplate>
    <DataTemplate>
      <Button Command="Select"
                CommandParameter="{Binding Path=(ItemsControl.AlternationIndex), RelativeSource={RelativeSource TemplatedParent}}"
                Content="{Binding RelativeSource={RelativeSource Mode=TemplatedParent}, Path=(ItemsControl.AlternationIndex)}" Width="200" Height="20" Click="Button_Click"/>
    </DataTemplate>
  </ItemsControl.ItemTemplate>
</ItemsControl>

Code Behind:

private void Click_Executed(object sender, ExecutedRoutedEventArgs e)
{
  MessageBox.Show("Index: " + e.Parameter.ToString());
}

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