Source control is null when accessing from a sub context menu item in C#

问题

I am trying to change the color of a button when they click on a sub menu item (colors > red) from a Context Menu Strip.

This code is attached to user defined amount of buttons. To figure out which button they are trying to change, I am trying to go from the sub item to the source control like such: sender > owner tool strip > owner menu > source control.

My Code:

private void redToolStripMenuItem_Click(object sender, EventArgs e)
{
    ToolStripItem subItem = sender as ToolStripItem;
    if (subItem == null) return;

    ToolStripItem mainItem = subItem.OwnerItem as ToolStripItem;
    if (mainItem == null) return;

    ContextMenuStrip menuStrip = mainItem.Owner as ContextMenuStrip;
    if (menuStrip == null) return;

    DataGridView dataGridView = menuStrip.SourceControl as DataGridView;
    if (dataGridView == null) return; //null here

    MessageBox.Show(dataGridView.Name);
}

From what I've found on google, this appears to be a bug. Are there any workarounds for this?

来源：https://stackoverflow.com/questions/30534417/source-control-is-null-when-accessing-from-a-sub-context-menu-item-in-c-sharp