private void menuManagerInfo_Click(object sender, EventArgs e)
{
FrmManagerInfo frmManagerInfo = FrmManagerInfo.Create(); //单例中不能new FrmManagerInfo()
frmManagerInfo.Show();
frmManagerInfo.Focus(); //获得焦点
}
public static FrmManagerInfo Create()
{
if (_frm == null)
{
_frm = new FrmManagerInfo();
}
return(_frm);
}
private void FrmManagerInfo_FormClosing(object sender, FormClosingEventArgs e)
{
//与单例保持一致
//出现这种代码的原因：Form的close()会释放当前窗体对象
_frm = null;
}
