private void button12_Click(object sender, EventArgs e) { jlk = new 会员查询(); if (jlk != null || jlk.IsDisposed == false) { jlk.Close(); } }
private void button13_Click(object sender, EventArgs e)//会员查询 { if (jlk == null || jlk.IsDisposed == true) { jlk = new 会员查询(); jlk.ShowDialog(); } }