using (MySqlConnection conn = new MySqlConnection(mysqlCon.ConnectionString))
{
    mysqlDa.SelectCommand.Connection = conn;
    //0表上永久，默认是30
    mysqlDa.SelectCommand.CommandTimeout = 0;
    conn.Open();

    MySqlTransaction tran = conn.BeginTransaction();
    mysqlDa.SelectCommand.Transaction = tran;
    mysqlDa.Fill(ds, "sp_AllInsert");
    tran.Commit();

    string returnStr = return_str.Value.ToString();
    tbCompanyID.Text = returnStr;
    MessageBox.Show(returnStr);
}