Saving Dataset to database

I am trying to save a dataset to a database. I got a dataset from another class, Now changes will be made on the form by a user on a datagridview, then the changed Dataset needs to be saved in the database. I am using the below code; Its not generating any errors, but the data is not being saved in the database. ``` public class myForm { DataSet myDataSet = new DataSet(); public void PouplateGridView() { try { SqlService sql = new SqlService(connectionString); // Valid Connection String, No Errors myDataSet = sql.ExecuteSqlDataSet("SELECT * FROM Qualification"); // Returns a DataSet myDataGridView.DataSource = myDataSet.Tables[0]; myDataGridView.AutoGenerateColumns = true; myDataGridView.AutoResizeColumns(); } catch (Exception ex) { MessageBox.Show(ex.InnerException + Environment.NewLine + ex.Message, "Error"); this.Close(); } } private void btnSave_Click(object sender, EventArgs e) { //myDataSet.AcceptChanges();EDIT:Don't know why, but this line wasn't letting the chane in db happen. SqlCommand sc = new SqlCommand("SELECT * FROM Qualification", sql.Connection); //ADDED after Replies SqlDataAdapter da = new SqlDataAdapter(); SqlCommandBuilder scb = new SqlCommandBuilder(da); //ADDED after replies da.Update(myDataSet.Tables[0]); } } public class mySqlService { public DataSet ExecuteSqlDataSet(string sql) { SqlCommand cmd = new SqlCommand(); this.Connect(); SqlDataAdapter da = new SqlDataAdapter(); DataSet ds = new DataSet(); cmd.CommandTimeout = this.CommandTimeout; cmd.Connection = _connection; if (_transaction != null) cmd.Transaction = _transaction; cmd.CommandText = sql; cmd.CommandType = CommandType.Text; da.SelectCommand = cmd; da.Fill(ds); da.Dispose(); cmd.Dispose(); if (this.AutoCloseConnection) this.Disconnect(); return ds; } } ``` What am I doing wrong here? There are ways on the web to save the dataset, if the datset is created, edited and saved in the same class etc., BUT I would like to have the select dataset method in the mySqlService class. How should I, now can save the dataset to the database? EDIT: I have commented the three lines that were required to make the code work. The code works now.