private void Create_Click(object sender, EventArgs e)
{
this.Hide();
Create_Student st = new Create_Student();
st.ShowDialog();
this.Close();
}
private void StudentData_CellContentClick(object sender, DataGridViewCellEventArgs e)
{
StudentData.Rows[e.RowIndex].ReadOnly = true;
int noOfRows = StudentData.RowCount;
if (e.ColumnIndex == 8 && e.RowIndex >= 0 && e.RowIndex != (noOfRows - 1)) // when click on del button
{
DialogResult dialogResult = MessageBox.Show("Are you sure that you want to delete it?", "Confirmation", MessageBoxButtons.YesNo);
if (dialogResult == DialogResult.Yes)
{
SqlConnection con = new SqlConnection(conURL);
// connection opens
con.Open();
try
{
string cmdText = "DELETE FROM Student WHERE Id = @Id";
SqlCommand c = new SqlCommand(cmdText, con);
int Idy = Convert.ToInt32(StudentData.Rows[e.RowIndex].Cells[0].Value);
c.Parameters.Add(new SqlParameter("@Id", Idy));
// execute it
int result = c.ExecuteNonQuery();
if (result < 0)
{
MessageBox.Show("Error");
}
string cmdText2 = "DELETE FROM Person WHERE Id = @Id";
SqlCommand c2 = new SqlCommand(cmdText2, con);
c2.Parameters.Add(new SqlParameter("@Id", Idy));
c2.ExecuteNonQuery();
// connection closed
con.Close();
StudentData.DataSource = null;
StudentData.Rows.Clear();
StudentData.Columns.Clear();
update();
MessageBox.Show("Successfully Deleted");
}
catch (Exception)
{
MessageBox.Show("This student might be assign to any project. So first delete that record then delete it from here");
}
}
else if (dialogResult == DialogResult.No)
{
//do something else
}
}
if (e.ColumnIndex == 9 && e.RowIndex >= 0 && e.RowIndex != (noOfRows - 1)) // when click on update button
{
stId = Convert.ToInt32(StudentData.Rows[e.RowIndex].Cells[0].Value);
this.Hide();
Create_Student create = new Create_Student();
create.ShowDialog();
this.Close();
}
else
{
}
}