private void 截取工具ToolStripMenuItem_Click(object sender, EventArgs e) { SubStringHelperFrm frm = SubStringHelperFrm.GetInstance(); frm.MdiParent = this; frm.Parent = Pnl; frm.Show(); }
public static SubStringHelperFrm GetInstance() { lock (_lock) { if (_instance == null) { _instance = new SubStringHelperFrm(); } } return(_instance); }