在单击事件上,我已将菜单项添加到上下文菜单中。但是在多次单击时,它会不断将菜单项添加到上下文菜单中。下面的代码正在使用它。
<StackPanel Grid.Row="13" Orientation="Horizontal" FlowDirection="LeftToRight">
<Button Name="btnMobile" Content="Home" HorizontalAlignment="Left" VerticalAlignment="Top" Margin="0 0 20 0" Width="70"></Button>
<!--<extToolkit:DropDownButton x:Name="ddBtnMobile" VerticalAlignment="Top" Width="30" HorizontalAlignment="Right" Margin="0 0 30 0" Height="20"/>-->
<Button HorizontalAlignment="Left" Name="ddBtnMobile" Width="30" Click="OnddBtnMobileClick" Margin="0,0,0,5" >
<Button.Content>
<Path x:Name="btnArrow3" Margin="4" VerticalAlignment="Center" Width="10" Fill="#FF527DB5" Stretch="Uniform" HorizontalAlignment="Right" Data="F1 M 301.14,-189.041L 311.57,-189.041L 306.355,-182.942L 301.14,-189.041 Z "/>
</Button.Content>
<Button.ContextMenu>
<ContextMenu Name="cMenu">
</ContextMenu>
</Button.ContextMenu>
</Button>
</StackPanel>
我使用的代码如下
private void OnddBtnMobileClick(object sender, RoutedEventArgs e)
{
mnItem = new MenuItem();
mnItem.Header ="B1";
cMenu.Items.Add(mnItem);
mnItem = new MenuItem();
mnItem.Header ="A1";
cMenu.Items.Add(mnItem);
mnItem = new MenuItem();
mnItem.Header="B 2";
cMenu.Items.Add(mnItem);
cMenu.AddHandler(MenuItem.ClickEvent, new RoutedEventHandler(OnMenuItemClick));
}
private void OnMenuItemClick(object sender, RoutedEventArgs e)
{
RoutedEventArgs args = e as RoutedEventArgs;
MenuItem item = args.OriginalSource as MenuItem;
string header = item.Header.ToString();
if (header == "Business")
{
btnMobile.Content = header;
}
else if (header == "Assistant")
{
btnMobile.Content = header;
}
}
如何解决我的问题..有没有更好的方法来编写上述逻辑。即在运行时添加上下文菜单的菜单项。