private void tsmiAddsinger_Click(object sender, EventArgs e)
{
FrmEditSinger frmEditSinger = new FrmEditSinger();
frmEditSinger.MdiParent = this; //设置为子窗体
frmEditSinger.Show(); //打开窗体
}
//1.新增歌手
private void tsmiNewSinger_Click(object sender, EventArgs e)
{
FrmEditSinger newSingerForm = new FrmEditSinger();
newSingerForm.MdiParent = this;
newSingerForm.Show();
}