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.
