Question

I have an image that has a nested context menu defined in the XAML (shown below).

I am trying to use a for loop to find a menu and uncheck it using IsChecked=false.

my code is as follows:

for (int i = 1; i <= 16; i++)
        {
            MenuItem theMenu = (MenuItem)this.FindName("beat" + i.ToString());
            theMenu.IsChecked = false;
        }

the above does not work and returns a null.

what am I doing wrong!

excerpt from the XAML

<Image x:Name="Options" Height="35" Source="Images/pad-options-button.png" Stretch="Fill" Width="47" Canvas.Left="740" Canvas.Top="293"
           MouseUp="Options_MouseUp">
        <Image.ContextMenu>
    <ContextMenu>
        <MenuItem Header="Beats">
            <MenuItem Name="beat1" Header="1" Click="MenuBeats_Click"/>
            <MenuItem Name="beat2" Header="2" Click="MenuBeats_Click"/>
            <MenuItem Name="beat3" Header="3" Click="MenuBeats_Click"/>
            <MenuItem Name="beat4" Header="4" Click="MenuBeats_Click"/>
            <MenuItem Name="beat5" Header="5" Click="MenuBeats_Click"/>
            <MenuItem Name="beat6" Header="6" Click="MenuBeats_Click"/>
            <MenuItem Name="beat7" Header="7" Click="MenuBeats_Click"/>
            <MenuItem Name="beat8" Header="8" Click="MenuBeats_Click"/>/>
            <MenuItem Name="beat9" Header="9" Click="MenuBeats_Click"/>
            <MenuItem Name="beat10" Header="10" Click="MenuBeats_Click"/>
            <MenuItem Name="beat11" Header="11" Click="MenuBeats_Click"/>
            <MenuItem Name="beat12" Header="12" Click="MenuBeats_Click"/>
            <MenuItem Name="beat13" Header="13" Click="MenuBeats_Click"/>
            <MenuItem Name="beat14" Header="14" Click="MenuBeats_Click"/>
            <MenuItem Name="beat15" Header="15" Click="MenuBeats_Click"/>
            <MenuItem Name="beat16" Header="16" Click="MenuBeats_Click"/>
        </MenuItem>
        <MenuItem Header="Beat Type">
            <MenuItem Name="Whole" Header="Whole" Click="MenuBeatType_Click"/>
            <MenuItem Name ="Half" Header="Half" Click="MenuBeatType_Click"/>
            <MenuItem Name ="Quarter" Header="Quarter" Click="MenuBeatType_Click"/>
            <MenuItem Name ="Eighth" Header="Eighth" Click="MenuBeatType_Click"/>
            <MenuItem Name ="Sixteenth" Header="Sixteenth" Click="MenuBeatType_Click"/>
        </MenuItem>
    </ContextMenu>
</Image.ContextMenu>
    </Image>
</Canvas>

Answer 1

An other option is to get the context menu from the image.

var items = Options.ContextMenu.Items
foreach(MenuItem item in items)
{ 
    // do your work with the item 
}

Be arware that you will have to handle the sub items!
Items will have only 2 items in your case