/// <summary>
 /// Read single entity and lock
 /// </summary>
 /// <param name="id">Id of record</param>
 /// <param name="lockBy">lock for username</param>
 /// <returns></returns>
 public async Task <EntityY> ReadAsync(int id, string lockBy = "")
 {
     using (var cmd = MsSql.NewCommand(_cn, "procReadY")) {
         cmd.Parameters["@id"].Value     = id;
         cmd.Parameters["@lockby"].Value = lockBy;
         try {
             using (var rs = await cmd.ExecuteReaderAsync()) {
                 if (await rs.ReadAsync())
                 {
                     return(new EntityY {
                         Id = (int)rs[0],
                         Name = (string)rs[1],
                         Price = (decimal)rs[2],
                         LockedBy = GetValueOrEmpty(rs[3])
                     });
                 }
             }
         } catch (SqlException ex) {
             if (ex.State == 11)
             {
                 throw new ConcurrencyException(ex.Message, ex);
             }
             else
             {
                 throw;
             }
         }
         throw new Exception("Record not exists");
     }
 }
        public async Task CreateAsync(EntityY item)
        {
            using (var cmd = MsSql.NewCommand(_cn, "procAddY")) {
                cmd.Parameters["@name"].Value  = item.Name;
                cmd.Parameters["@price"].Value = item.Price;
                await cmd.ExecuteNonQueryAsync();

                item.Id = (int)cmd.Parameters[0].Value;
            }
        }
        public async Task DeleteAsync(int id, string lockBy = "")
        {
            //Delete do not check for concurrency here,it just deletes the record.
            using (var cmd = MsSql.NewCommand(_cn, "procDeleteY")) {
                cmd.Parameters["@id"].Value       = id;
                cmd.Parameters["@lockedby"].Value = lockBy;
                var result = await cmd.ExecuteNonQueryAsync();

                if (result == 0)
                {
                    throw new Exception("Record with this primary key cannot be deleted");
                }
            }
        }
        public async Task <IEnumerable <EntityY> > GetListAsync()
        {
            var result = new List <EntityY>();

            using (var cmd = MsSql.NewCommand(_cn, "procListY")) {
                using (var rs = await cmd.ExecuteReaderAsync()) {
                    while (await rs.ReadAsync())
                    {
                        result.Add(new EntityY {
                            Id       = (int)rs[0],
                            Name     = (string)rs[1],
                            Price    = (decimal)rs[2],
                            LockedBy = GetValueOrEmpty(rs[3])
                        });
                    }
                }
                return(result);
            }
        }
Beispiel #5
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        public async Task <EntityX> ReadAsync(int id, string lockBy = "")
        {
            using (var cmd = MsSql.NewCommand(_cn, "procReadX")) {
                cmd.Parameters["@id"].Value = id;

                using (var rs = await cmd.ExecuteReaderAsync()) {
                    if (await rs.ReadAsync())
                    {
                        return(new EntityX {
                            Id = (int)rs[0],
                            Name = (string)rs[1],
                            Price = (decimal)rs[2],
                            RowVersion = (Guid)rs[3]
                        });
                    }
                }
                throw new Exception("Record not exists");
            }
        }
Beispiel #6
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        public async Task <IEnumerable <EntityX> > GetListAsync()
        {
            var result = new List <EntityX>();

            using (var cmd = MsSql.NewCommand(_cn, "procListX")) {
                using (var rs = await cmd.ExecuteReaderAsync()) {
                    while (await rs.ReadAsync())
                    {
                        result.Add(new EntityX {
                            Id         = (int)rs[0],
                            Name       = (string)rs[1],
                            Price      = (decimal)rs[2],
                            RowVersion = (Guid)rs[3]
                        });
                    }
                }
                return(result);
            }
        }
 public async Task UpdateAsync(EntityY item)
 {
     //Update record in database. Record is actually updated only if lock is set by matching user
     //If not, SQL SP throws an error.
     using (var cmd = MsSql.NewCommand(_cn, "procUpdateY")) {
         cmd.Parameters["@id"].Value       = item.Id;
         cmd.Parameters["@name"].Value     = item.Name;
         cmd.Parameters["@price"].Value    = item.Price;
         cmd.Parameters["@lockedby"].Value = item.LockedBy;
         try {
             await cmd.ExecuteNonQueryAsync();
         } catch (SqlException ex) {
             if (ex.State == 10)
             {
                 throw new ConcurrencyException(ex.Message, ex);
             }
             else
             {
                 throw;
             }
         }
     }
 }