private void InFileToolStripMenuItem_Click(object sender, EventArgs e) { if (DisplayFromDB == null) { DisplayFromFile = new DisplayAllFromFile(); DisplayFromFile.MdiParent = this; DisplayFromFile.FormClosed += DisplayFromFile_FormClosed;; DisplayFromFile.Show(); } else { DisplayFromFile.Activate(); } }
private void DisplayFromFile_FormClosed(object sender, FormClosedEventArgs e) { DisplayFromFile = null; }