private void button1_Click(object sender, EventArgs e) { level1 = null; Form2 f2 = new Form2(); f2.Owner = this; f2.ShowDialog(); level1 = f2.level2; if (level1 == "master") { Form3 f3 = new Form3();//什么都可以做 f3.rank = "master"; f3.line = f2.username; f3.Owner = this; f3.ShowDialog(); } else if (level1 == "security") { Form5 f5 = new Form5(); f5.Owner = this; f5.rank = "security"; f5.ShowDialog(); } else if (level1 == "insert") { Form7 f7 = new Form7(); f7.rank7 = "insert"; f7.name = f2.username; f7.Owner = this; f7.ShowDialog();//只有插入以及插入时必要的更新 } else if (level1 == "inner") { Form11 f11 = new Form11(); f11.username11 = f2.username; f11.Owner = this; f11.ShowDialog(); } else if (level1 == "waiter") { Form8 f8 = new Form8(); f8.rank8 = "waiter"; f8.Owner = this; f8.ShowDialog();//只有删除,以及数量上的更新 } }