private void 车位信息检索ToolStripMenuItem_Click(object sender, EventArgs e) { panel1.Controls.Clear(); this.IsMdiContainer = true; SearchParking searchParking = new SearchParking(); searchParking.MdiParent = this; searchParking.Parent = this.panel1; label1.Visible = false; searchParking.FormBorderStyle = FormBorderStyle.None; searchParking.Show(); }