SaveAndGotoBookmark() публичный Метод

Update the tableid and position the tableid on the record that was modified. This can be useful when inserting a record because by default the tableid remains in its old location.
Save is the final step in performing an insert or an update. The update is begun by calling creating an Update object and then by calling JetSetColumn or JetSetColumns one or more times to set the record state. Finally, Update is called to complete the update operation. Indexes are updated only by Update or and not during JetSetColumn or JetSetColumns
public SaveAndGotoBookmark ( ) : void
Результат void
Пример #1
0
		private void ExecuteOnReduceKey(string view, string reduceKey,
			Table table,
			IDictionary<string, JET_COLUMNID> columnids,
			Action updateAction,
			Action insertAction)
		{
			var hashReduceKey = HashReduceKey(reduceKey);

			Api.JetSetCurrentIndex(session, table, "by_view_and_hashed_reduce_key");
			Api.MakeKey(session, table, view, Encoding.Unicode, MakeKeyGrbit.NewKey);
			Api.MakeKey(session, table, hashReduceKey, MakeKeyGrbit.None);
			Api.MakeKey(session, table, reduceKey, Encoding.Unicode, MakeKeyGrbit.None);

			if (Api.TrySeek(session, table, SeekGrbit.SeekEQ) == false)
			{
				if (insertAction == null)
					return;
				using (var update = new Update(session, table, JET_prep.Insert))
				{
					Api.SetColumn(session, table, columnids["view"], view, Encoding.Unicode);
					Api.SetColumn(session, table, columnids["reduce_key"], reduceKey, Encoding.Unicode);
					Api.SetColumn(session, table, columnids["hashed_reduce_key"], hashReduceKey);

					insertAction();
					update.SaveAndGotoBookmark();
				}
				return;
			}

			Api.MakeKey(session, table, view, Encoding.Unicode, MakeKeyGrbit.NewKey);
			Api.MakeKey(session, table, hashReduceKey, MakeKeyGrbit.None);
			Api.MakeKey(session, table, reduceKey, Encoding.Unicode, MakeKeyGrbit.None);

			Api.TrySetIndexRange(session, table, SetIndexRangeGrbit.RangeInclusive | SetIndexRangeGrbit.RangeUpperLimit);
			do
			{
				var reduceKeyFromDb = Api.RetrieveColumnAsString(session, table, columnids["reduce_key"]);
				if (StringComparer.Ordinal.Equals(reduceKey, reduceKeyFromDb) == false)
					continue;

				updateAction();
				return;
			} while (Api.TryMoveNext(session, table));

			// couldn't find it...

			if (insertAction == null)
				return;

			using (var update = new Update(session, table, JET_prep.Insert))
			{
				Api.SetColumn(session, table, columnids["view"], view, Encoding.Unicode);
				Api.SetColumn(session, table, columnids["reduce_key"], reduceKey, Encoding.Unicode);
				Api.SetColumn(session, table, columnids["hashed_reduce_key"], hashReduceKey);

				insertAction();

				update.SaveAndGotoBookmark();
			}
		}
Пример #2
0
 public void TestSaveAndGotoBookmarkThrowsExceptionWhenUpdateIsDisposed()
 {
     var update = new Update(this.sesid, this.tableid, JET_prep.Insert);
     update.Dispose();
     update.SaveAndGotoBookmark();
 }
Пример #3
0
        /// <summary>
        /// Generate some logs. This is used by tests that do backups.
        /// </summary>
        /// <param name="sesid">The session to use.</param>
        /// <param name="dbid">The database to use to generate the logs.</param>
        private static void GenerateSomeLogs(JET_SESID sesid, JET_DBID dbid)
        {
            if (EsentVersion.SupportsWindows7Features)
            {
                for (int i = 0; i < 10; ++i)
                {
                    Api.JetCommitTransaction(sesid, Windows7Grbits.ForceNewLog);
                }
            }
            else
            {
                using (var transaction = new Transaction(sesid))
                {
                    JET_TABLEID junkTable;
                    Api.JetCreateTable(sesid, dbid, "junk", 1, 100, out junkTable);
                    JET_COLUMNID binaryColumn;
                    Api.JetAddColumn(sesid, junkTable, "column", new JET_COLUMNDEF { coltyp = JET_coltyp.LongBinary }, null, 0, out binaryColumn);

                    byte[] data = new byte[1023];
                    for (int i = 0; i < 256; ++i)
                    {
                        using (var update = new Update(sesid, junkTable, JET_prep.Insert))
                        {
                            Api.JetSetColumn(
                                sesid,
                                junkTable,
                                binaryColumn,
                                data,
                                data.Length,
                                SetColumnGrbit.IntrinsicLV,
                                null);
                            update.SaveAndGotoBookmark();
                        }

                        transaction.Commit(CommitTransactionGrbit.LazyFlush);
                        transaction.Begin();
                    }

                    Api.JetCloseTable(sesid, junkTable);
                    Api.JetDeleteTable(sesid, dbid, "junk");
                    transaction.Commit(CommitTransactionGrbit.LazyFlush);
                }
            }
        }
Пример #4
0
        /// <summary>
        /// Insert a record with the given column values. After the insert the cursor is 
        /// positioned on the record.
        /// </summary>
        /// <param name="key">
        /// The key of the record.
        /// </param>
        /// <param name="values">
        /// The column values to insert.
        /// </param>
        private void InsertRecord(int key, params string[] values)
        {
            using (var transaction = new Transaction(this.sesid))
            using (var update = new Update(this.sesid, this.tableid, JET_prep.Insert))
            {
                Api.SetColumn(this.sesid, this.tableid, this.keyColumn, key);
                foreach (string value in values)
                {
                    var setinfo = new JET_SETINFO
                    {
                        ibLongValue = 0,
                        itagSequence = 0,
                    };
                    byte[] data = Encoding.Unicode.GetBytes(value);
                    Api.JetSetColumn(
                        this.sesid, this.tableid, this.multiValueColumn, data, data.Length, SetColumnGrbit.None, setinfo);
                }

                update.SaveAndGotoBookmark();
                transaction.Commit(CommitTransactionGrbit.None);
            }
        }
Пример #5
0
        public void TestSaveAndGotoBookmarkPositionsCursor()
        {
            using (var update = new Update(this.sesid, this.tableid, JET_prep.Insert))
            {
                update.SaveAndGotoBookmark();
            }

            Api.RetrieveKey(this.sesid, this.tableid, RetrieveKeyGrbit.None);
        }
Пример #6
0
        public void RetrieveColumnsWithZeroLength()
        {
            using (var trx = new Transaction(this.session))
            using (var update = new Update(this.session, this.tableid, JET_prep.Insert))
            {
                Api.SetColumn(this.session, this.tableid, this.columnDict["Unicode"], String.Empty, Encoding.Unicode);
                Api.SetColumn(this.session, this.tableid, this.columnDict["Binary"], new byte[0]);
                update.SaveAndGotoBookmark();
                trx.Commit(CommitTransactionGrbit.None);
            }

            var columnValues = new ColumnValue[]
            {
                new StringColumnValue { Columnid = this.columnDict["Unicode"] },
                new BytesColumnValue { Columnid = this.columnDict["Binary"] },
            };

            Api.RetrieveColumns(this.session, this.tableid, columnValues);

            Assert.AreEqual(String.Empty, columnValues[0].ValueAsObject);
            CollectionAssert.AreEqual(new byte[0], columnValues[1].ValueAsObject as byte[]);
        }
Пример #7
0
        public void GetRecordSizeOnVista()
        {
            if (!EsentVersion.SupportsVistaFeatures)
            {
                return;
            }

            string directory = SetupHelper.CreateRandomDirectory();
            string database = Path.Combine(directory, "test.db");

            using (var instance = new Instance("VistaGetRecordSize"))
            {
                instance.Parameters.Recovery = false;
                instance.Parameters.NoInformationEvent = true;
                instance.Parameters.MaxTemporaryTables = 0;
                instance.Init();
                using (var session = new Session(instance))
                {
                    JET_DBID dbid;
                    Api.JetCreateDatabase(session, database, String.Empty, out dbid, CreateDatabaseGrbit.None);
                    using (var transaction = new Transaction(session))
                    {
                        JET_TABLEID tableid;
                        Api.JetCreateTable(session, dbid, "table", 0, 100, out tableid);
                        JET_COLUMNID columnid;
                        Api.JetAddColumn(
                            session,
                            tableid,
                            "column1",
                            new JET_COLUMNDEF { coltyp = JET_coltyp.LongBinary },
                            null,
                            0,
                            out columnid);

                        var size = new JET_RECSIZE();
                        byte[] data = Any.Bytes;

                        using (var update = new Update(session, tableid, JET_prep.Insert))
                        {
                            Api.SetColumn(session, tableid, columnid, data);
                            VistaApi.JetGetRecordSize(session, tableid, ref size, GetRecordSizeGrbit.Local | GetRecordSizeGrbit.InCopyBuffer);
                            update.SaveAndGotoBookmark();
                        }

                        VistaApi.JetGetRecordSize(session, tableid, ref size, GetRecordSizeGrbit.RunningTotal);

                        Assert.AreEqual(data.Length * 2, size.cbData, "cbData");
                        Assert.AreEqual(data.Length * 2, size.cbDataCompressed, "cbDataCompressed");
                        Assert.AreEqual(0, size.cbLongValueData, "cbLongValueData");
                        Assert.AreEqual(0, size.cbLongValueDataCompressed, "cbLongValueDataCompressed");
                        Assert.AreEqual(0, size.cbLongValueOverhead, "cbLongValueOverhead");
                        Assert.AreNotEqual(0, size.cbOverhead, "cbOverhead");
                        Assert.AreEqual(0, size.cCompressedColumns, "cCompressedColumns");
                        Assert.AreEqual(0, size.cLongValues, "cLongValues");
                        Assert.AreEqual(0, size.cMultiValues, "cMultiValues");
                        Assert.AreEqual(0, size.cNonTaggedColumns, "cTaggedColumns");
                        Assert.AreEqual(2, size.cTaggedColumns, "cTaggedColumns");

                        transaction.Commit(CommitTransactionGrbit.LazyFlush);
                    }
                }
            }

            Cleanup.DeleteDirectoryWithRetry(directory);
        }
Пример #8
0
        public void RetrieveColumnsWithMultivalues()
        {
            using (var trx = new Transaction(this.session))
            using (var update = new Update(this.session, this.tableid, JET_prep.Insert))
            {
                Api.JetSetColumn(
                    this.session,
                    this.tableid,
                    this.columnDict["uint64"],
                    BitConverter.GetBytes(5UL),
                    sizeof(ulong),
                    SetColumnGrbit.None,
                    new JET_SETINFO { itagSequence = 1 });
                Api.JetSetColumn(
                    this.session,
                    this.tableid,
                    this.columnDict["uint64"],
                    BitConverter.GetBytes(99UL),
                    sizeof(ulong),
                    SetColumnGrbit.None,
                    new JET_SETINFO { itagSequence = 2 });
                update.SaveAndGotoBookmark();
                trx.Commit(CommitTransactionGrbit.None);
            }

            var columnValues = new ColumnValue[]
            {
                new UInt64ColumnValue { Columnid = this.columnDict["UInt64"], ItagSequence = 1 },
                new UInt64ColumnValue { Columnid = this.columnDict["UInt64"], ItagSequence = 2 },
            };

            Api.RetrieveColumns(this.session, this.tableid, columnValues);

            Assert.AreEqual(5UL, columnValues[0].ValueAsObject);
            Assert.AreEqual(99UL, columnValues[1].ValueAsObject);
        }
Пример #9
0
        public void RetrieveColumnsWithNull()
        {
            using (var trx = new Transaction(this.session))
            using (var update = new Update(this.session, this.tableid, JET_prep.Insert))
            {
                update.SaveAndGotoBookmark();
                trx.Commit(CommitTransactionGrbit.None);
            }

            var columnValues = new ColumnValue[]
            {
                new BoolColumnValue { Columnid = this.columnDict["Boolean"] },
                new ByteColumnValue { Columnid = this.columnDict["Byte"] },
                new Int16ColumnValue { Columnid = this.columnDict["Int16"] },
                new UInt16ColumnValue { Columnid = this.columnDict["UInt16"] },
                new Int32ColumnValue { Columnid = this.columnDict["Int32"] },
                new UInt32ColumnValue { Columnid = this.columnDict["UInt32"] },
                new Int64ColumnValue { Columnid = this.columnDict["Int64"] },
                new UInt64ColumnValue { Columnid = this.columnDict["UInt64"] },
                new FloatColumnValue { Columnid = this.columnDict["Float"] },
                new DoubleColumnValue { Columnid = this.columnDict["Double"] },
                new DateTimeColumnValue { Columnid = this.columnDict["DateTime"] },
                new GuidColumnValue { Columnid = this.columnDict["Guid"] },
                new StringColumnValue { Columnid = this.columnDict["Unicode"] },
                new BytesColumnValue { Columnid = this.columnDict["Binary"] },
            };

            Api.RetrieveColumns(this.session, this.tableid, columnValues);

            foreach (var c in columnValues)
            {
                Assert.IsNull(c.ValueAsObject);
            }
        }
Пример #10
0
        public void RetrieveColumnsWithInvalidColumn()
        {
            using (var trx = new Transaction(this.session))
            using (var update = new Update(this.session, this.tableid, JET_prep.Insert))
            {
                Api.SetColumn(this.session, this.tableid, this.columnDict["Int64"], Any.Int64);
                update.SaveAndGotoBookmark();
                trx.Commit(CommitTransactionGrbit.None);
            }

            var columnValues = new ColumnValue[]
            {
                new GuidColumnValue { Columnid = this.columnDict["Int64"] },
            };

            Api.RetrieveColumns(this.session, this.tableid, columnValues);
        }
Пример #11
0
        public void RetrieveColumnsWithLargeValues()
        {
            string str = Any.StringOfLength(129 * 1024);
            byte[] bytes = Any.BytesOfLength(127 * 1024);

            using (var trx = new Transaction(this.session))
            using (var update = new Update(this.session, this.tableid, JET_prep.Insert))
            {
                Api.SetColumn(this.session, this.tableid, this.columnDict["Unicode"], str, Encoding.Unicode);
                Api.SetColumn(this.session, this.tableid, this.columnDict["Binary"], bytes);

                update.SaveAndGotoBookmark();
                trx.Commit(CommitTransactionGrbit.None);
            }

            var columnValues = new ColumnValue[]
            {
                new StringColumnValue { Columnid = this.columnDict["Unicode"] },
                new BytesColumnValue { Columnid = this.columnDict["Binary"] },
            };

            Api.RetrieveColumns(this.session, this.tableid, columnValues);

            Assert.AreEqual(str, columnValues[0].ValueAsObject);
            CollectionAssert.AreEqual(bytes, columnValues[1].ValueAsObject as byte[]);
        }
Пример #12
0
        public void RetrieveColumns()
        {
            bool bit = Any.Boolean;
            byte b = Any.Byte;
            short i16 = Any.Int16;
            ushort ui16 = Any.UInt16;
            int i32 = Any.Int32;
            uint ui32 = Any.UInt32;
            long i64 = Any.Int64;
            ulong ui64 = Any.UInt64;
            float f = Any.Float;
            double d = Any.Double;
            DateTime date = Any.DateTime;
            Guid guid = Any.Guid;
            string str = Any.String;
            byte[] bytes = Any.BytesOfLength(1023);

            using (var trx = new Transaction(this.session))
            using (var update = new Update(this.session, this.tableid, JET_prep.Insert))
            {
                Api.SetColumn(this.session, this.tableid, this.columnDict["Boolean"], bit);
                Api.SetColumn(this.session, this.tableid, this.columnDict["Byte"], b);
                Api.SetColumn(this.session, this.tableid, this.columnDict["Int16"], i16);
                Api.SetColumn(this.session, this.tableid, this.columnDict["UInt16"], ui16);
                Api.SetColumn(this.session, this.tableid, this.columnDict["Int32"], i32);
                Api.SetColumn(this.session, this.tableid, this.columnDict["UInt32"], ui32);
                Api.SetColumn(this.session, this.tableid, this.columnDict["Int64"], i64);
                Api.SetColumn(this.session, this.tableid, this.columnDict["UInt64"], ui64);
                Api.SetColumn(this.session, this.tableid, this.columnDict["Float"], f);
                Api.SetColumn(this.session, this.tableid, this.columnDict["Double"], d);
                Api.SetColumn(this.session, this.tableid, this.columnDict["DateTime"], date);
                Api.SetColumn(this.session, this.tableid, this.columnDict["Guid"], guid);
                Api.SetColumn(this.session, this.tableid, this.columnDict["Unicode"], str, Encoding.Unicode);
                Api.SetColumn(this.session, this.tableid, this.columnDict["Binary"], bytes);

                update.SaveAndGotoBookmark();
                trx.Commit(CommitTransactionGrbit.None);
            }

            var columnValues = new ColumnValue[]
            {
                new BoolColumnValue { Columnid = this.columnDict["Boolean"] },
                new ByteColumnValue { Columnid = this.columnDict["Byte"] },
                new Int16ColumnValue { Columnid = this.columnDict["Int16"] },
                new UInt16ColumnValue { Columnid = this.columnDict["UInt16"] },
                new Int32ColumnValue { Columnid = this.columnDict["Int32"] },
                new UInt32ColumnValue { Columnid = this.columnDict["UInt32"] },
                new Int64ColumnValue { Columnid = this.columnDict["Int64"] },
                new UInt64ColumnValue { Columnid = this.columnDict["UInt64"] },
                new FloatColumnValue { Columnid = this.columnDict["Float"] },
                new DoubleColumnValue { Columnid = this.columnDict["Double"] },
                new DateTimeColumnValue { Columnid = this.columnDict["DateTime"] },
                new GuidColumnValue { Columnid = this.columnDict["Guid"] },
                new StringColumnValue { Columnid = this.columnDict["Unicode"] },
                new BytesColumnValue { Columnid = this.columnDict["Binary"] },
            };

            Api.RetrieveColumns(this.session, this.tableid, columnValues);

            Assert.AreEqual(bit, columnValues[0].ValueAsObject);
            Assert.AreEqual(b, columnValues[1].ValueAsObject);
            Assert.AreEqual(i16, columnValues[2].ValueAsObject);
            Assert.AreEqual(ui16, columnValues[3].ValueAsObject);
            Assert.AreEqual(i32, columnValues[4].ValueAsObject);
            Assert.AreEqual(ui32, columnValues[5].ValueAsObject);
            Assert.AreEqual(i64, columnValues[6].ValueAsObject);
            Assert.AreEqual(ui64, columnValues[7].ValueAsObject);
            Assert.AreEqual(f, columnValues[8].ValueAsObject);
            Assert.AreEqual(d, columnValues[9].ValueAsObject);
            Assert.AreEqual(date, columnValues[10].ValueAsObject);
            Assert.AreEqual(guid, columnValues[11].ValueAsObject);
            Assert.AreEqual(str, columnValues[12].ValueAsObject);
            CollectionAssert.AreEqual(bytes, columnValues[13].ValueAsObject as byte[]);
        }
Пример #13
0
        public void JetRetrieveColumnsNullBuffer()
        {
            byte[] data = Any.Bytes;

            using (var trx = new Transaction(this.session))
            using (var update = new Update(this.session, this.tableid, JET_prep.Insert))
            {
                Api.SetColumn(this.session, this.tableid, this.columnDict["Binary"], data);
                update.SaveAndGotoBookmark();
                trx.Commit(CommitTransactionGrbit.None);
            }

            var retrievecolumns = new[]
            {
                new JET_RETRIEVECOLUMN { columnid = this.columnDict["Binary"], itagSequence = 1 },
            };

            Assert.AreEqual(
                JET_wrn.BufferTruncated,
                Api.JetRetrieveColumns(this.session, this.tableid, retrievecolumns, retrievecolumns.Length));

            Assert.AreEqual(data.Length, retrievecolumns[0].cbActual);
            Assert.AreEqual(JET_wrn.BufferTruncated, retrievecolumns[0].err);
        }
Пример #14
0
        // insert a record and update its long-values
        private void UpdateLongValues()
        {
            Console.WriteLine("\tUpdate Long-Values");
            JET_TABLEID tableid;
            Api.JetOpenTable(this.sesid, this.dbid, this.table, null, 0, OpenTableGrbit.None, out tableid);

            int recordID = NumRecords + 17;
            var rand = new Random(recordID);

            var data = new byte[this.columnInfos.Length][];

            Api.JetBeginTransaction(this.sesid);

            // insert the record
            using (var update = new Update(this.sesid, tableid, JET_prep.Insert))
            {
                for (int i = 0; i < this.columnInfos.Length; ++i)
                {
                    data[i] = null;
                    if (String.Equals(
                        this.columnInfos[i].Name, "recordID", StringComparison.InvariantCultureIgnoreCase))
                    {
                        // this is the primary index column, set it to the recordID
                        data[i] = BitConverter.GetBytes(recordID);
                    }
                    else if (this.columnInfos[i].Coltyp == JET_coltyp.LongBinary
                             || this.columnInfos[i].Coltyp == JET_coltyp.LongText)
                    {
                        data[i] = DataGenerator.GetRandomColumnData(
                            this.columnInfos[i].Coltyp, this.columnInfos[i].Cp, rand);
                    }

                    if (null != data[i])
                    {
                        Api.SetColumn(this.sesid, tableid, this.columnInfos[i].Columnid, data[i]);
                    }
                }

                update.SaveAndGotoBookmark();
            }

            this.CheckColumns(this.sesid, tableid, data);

            // update the record
            using (var update = new Update(this.sesid, tableid, JET_prep.Replace))
            {
                for (int i = 0; i < this.columnInfos.Length; ++i)
                {
                    if (this.columnInfos[i].Coltyp == JET_coltyp.LongBinary
                        || this.columnInfos[i].Coltyp == JET_coltyp.LongText)
                    {
                        int size = Api.RetrieveColumnSize(this.sesid, tableid, this.columnInfos[i].Columnid).Value;
                        BasicClass.Assert(size == data[i].Length, "Invalid column size");

                        var setinfo = new JET_SETINFO();
                        setinfo.ibLongValue = size / 2;
                        setinfo.itagSequence = 1;

                        // the data that will be added to the column
                        byte[] newdata = DataGenerator.GetRandomColumnData(
                            this.columnInfos[i].Coltyp, this.columnInfos[i].Cp, rand);

                        // what the final data should be
                        byte[] finaldata = null;

                        switch (rand.Next(2))
                        {
                            case 0: // append
                                Api.SetColumn(
                                    this.sesid, tableid, this.columnInfos[i].Columnid, newdata, SetColumnGrbit.AppendLV);
                                finaldata = new byte[size + newdata.Length];
                                Array.Copy(data[i], finaldata, size);
                                Array.Copy(newdata, 0, finaldata, size, newdata.Length);
                                break;
                            case 1: // overwrite and set size
                                Api.JetSetColumn(
                                    this.sesid,
                                    tableid,
                                    this.columnInfos[i].Columnid,
                                    newdata,
                                    newdata.Length,
                                    SetColumnGrbit.SizeLV | SetColumnGrbit.OverwriteLV,
                                    setinfo);
                                finaldata = new byte[setinfo.ibLongValue + newdata.Length];
                                Array.Copy(data[i], finaldata, setinfo.ibLongValue);
                                Array.Copy(newdata, 0, finaldata, setinfo.ibLongValue, newdata.Length);
                                break;
                        }

                        data[i] = finaldata;
                    }
                }

                update.SaveAndGotoBookmark();
            }

            this.CheckColumns(this.sesid, tableid, data);

            Api.JetCommitTransaction(this.sesid, CommitTransactionGrbit.LazyFlush);
            Api.JetCloseTable(this.sesid, tableid);
        }
Пример #15
0
        // Inserts a copy of a record and makes sure the data is equal
        private void InsertCopy()
        {
            Console.WriteLine("\tInsertCopy");
            JET_TABLEID tableid;
            Api.JetOpenTable(this.sesid, this.dbid, this.table, null, 0, OpenTableGrbit.None, out tableid);
            Api.JetBeginTransaction(this.sesid);
            this.SeekRecord(this.sesid, tableid, NumRecords / 2);
            byte[][] data = this.GetColumnsWithJetRetrieveColumn(this.sesid, tableid);

            using (var update = new Update(this.sesid, tableid, JET_prep.InsertCopy))
            {
                for (int i = 0; i < this.columnInfos.Length; ++i)
                {
                    int recordID = NumRecords + 13;
                    if (String.Equals(
                        this.columnInfos[i].Name, "recordID", StringComparison.InvariantCultureIgnoreCase))
                    {
                        // this is the primary index column, set it to the new recordID
                        data[i] = BitConverter.GetBytes(recordID);
                        Api.SetColumn(this.sesid, tableid, this.columnInfos[i].Columnid, data[i]);
                    }
                }

                update.SaveAndGotoBookmark();
            }

            this.CheckColumns(this.sesid, tableid, data);
            Api.JetCommitTransaction(this.sesid, CommitTransactionGrbit.LazyFlush);
            Api.JetCloseTable(this.sesid, tableid);
        }
Пример #16
0
        // Inserts a record and then deletes it
        private void Delete()
        {
            Console.WriteLine("\tDelete");
            JET_TABLEID tableid;
            Api.JetOpenTable(this.sesid, this.dbid, this.table, null, 0, OpenTableGrbit.None, out tableid);

            int recordID = 450;

            byte[][] data = this.GenerateColumnData(recordID, recordID);
            Api.JetMove(this.sesid, tableid, JET_Move.Last, MoveGrbit.None);

            Api.JetBeginTransaction(this.sesid);
            using (var update = new Update(this.sesid, tableid, JET_prep.InsertCopy))
            {
                this.SetColumns(this.sesid, tableid, data);
                update.SaveAndGotoBookmark();
            }

            this.CheckColumns(this.sesid, tableid, data);
            Api.JetCommitTransaction(this.sesid, CommitTransactionGrbit.LazyFlush);

            Api.JetBeginTransaction(this.sesid);
            this.SeekRecord(this.sesid, tableid, recordID);
            Api.JetDelete(this.sesid, tableid);
            Api.JetCommitTransaction(this.sesid, CommitTransactionGrbit.LazyFlush);

            try
            {
                this.SeekRecord(this.sesid, tableid, recordID);
                throw new Exception("Expected an EsentRecordNotFoundException");
            }
            catch (EsentRecordNotFoundException)
            {
            }

            Api.JetCloseTable(this.sesid, tableid);
        }