private void 用户管理ToolStripMenuItem_Click(object sender, EventArgs e) { if (!isExist("Yonghu")) { Yonghu yonghu = new Yonghu(); yonghu.MdiParent = this; yonghu.Show(); } }
private void 用户管理ToolStripMenuItem_Click(object sender, EventArgs e) { if (!isExist("Yonghu")) { Yonghu yonghu = new Yonghu(); yonghu.MdiParent=this; yonghu.Show(); } }