private void showStudentsToolStripMenuItem_Click(object sender, EventArgs e)
{
Show_Student_Form d = new Show_Student_Form();
d.Show();
// this.Hide();
}
private void Stu_update_button_Click(object sender, EventArgs e)
{
string sName = txtStdName.Text;
string sId = txtStdID.Text;
string sRoll = txtStdRoll.Text;
string sClass = txtStdclass.Text;
string sDob = txtStdDob.Text;
string sGender = txtStdGender.Text;
string sBlood = txtStdBlood.Text;
string sGd = txtStdGardian.Text;
string sCon = txtStdContact.Text;
string sAdd = txtStdAddress.Text;
string sFee = txtStdFee.Text;
string sSch = txtStdFeeOff.Text;
queryClass.updateStudent(sName, sId, sRoll, sClass, sDob, sGender, sBlood, sGd, sCon, sAdd, sFee, sSch);
this.Hide();
Show_Student_Form d = new Show_Student_Form();
d.ShowDialog();
}