/// <summary>
/// 清单管理
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void tsmiSystemMenu_Click(object sender, EventArgs e)
{
SystemMenu smu = SystemMenu.CreateForm();
smu.MdiParent = this;
smu.Show();
}
public static SystemMenu CreateForm()
{
if (_single == null)
{
_single = new SystemMenu();
}
else
{
_single.Activate();
}
return(_single);
}
private void SystemMenu_FormClosed(object sender, FormClosedEventArgs e)
{
_single = null;
}