110,533
社区成员
发帖
与我相关
我的任务
分享
private void tsBtnDvd_Click(object sender, EventArgs e)
{
DVDManagerForm dvdManagerForm = new DVDManagerForm();
dvdManagerForm.MdiParent = this;
dvdManagerForm.Show();
}
//主窗体中:
public static DVDManagerForm dvdManagerForm;
private void tsBtnDvd_Click(object sender, EventArgs e)
{
if(dvdManagerForm == null)
{
dvdManagerForm.MdiParent = this;
dvdManagerForm.Show();
}
else
{
dvdManagerForm.Activate();
}
}
//注意在DVDManagerForm的Form_Closing事件中:
主窗体.dvdManagerForm = null;