C# JET_SESID类代码示例

 protected void GetColumnIds(
     JET_SESID sessionId, Table table, out JET_COLUMNID projectColumnId, out JET_COLUMNID projectNameColumnId, out JET_COLUMNID documentColumnId)
 {
     projectColumnId = Api.GetTableColumnid(sessionId, table, ProjectColumnName);
     projectNameColumnId = Api.GetTableColumnid(sessionId, table, ProjectNameColumnName);
     documentColumnId = Api.GetTableColumnid(sessionId, table, DocumentColumnName);
 }

            public override void Create(JET_SESID sessionId, JET_DBID databaseId)
            {
                var identifierColumnCreate = CreateIdColumn(IdentifierColumnName);
                var locationsColumnCreate = CreateBinaryColumn(LocationsColumnName);

                var columns = CreateProjectDocumentColumns(identifierColumnCreate, locationsColumnCreate);

                var primaryIndexKey = CreateProjectDocumentIndexKey(IdentifierColumnName);

                var indexes = new JET_INDEXCREATE[]
                {
                    CreatePrimaryIndex(primaryIndexKey)
                };

                var tableCreate = CreateTable(TableName, columns, indexes);

                Api.JetCreateTableColumnIndex3(sessionId, databaseId, tableCreate);

                GetColumnIds(columns, out _projectColumnId, out _projectNameColumnId, out _documentColumnId);

                _identifierColumnId = identifierColumnCreate.columnid;
                _locationsColumnId = locationsColumnCreate.columnid;

                Api.JetCloseTable(sessionId, tableCreate.tableid);
            }

        /// <summary>
        /// Constructs a search key that may then be used by <see cref="JetSeek"/>
        /// and <see cref="JetSetIndexRange"/>.
        /// </summary>
        /// <param name="sesid">The session to use.</param>
        /// <param name="tableid">The cursor to create the key on.</param>
        /// <param name="data">Column data for the current key column of the current index.</param>
        /// <param name="encoding">The encoding used to convert the string.</param>
        /// <param name="grbit">Key options.</param>
        public static void MakeKey(JET_SESID sesid, JET_TABLEID tableid, string data, Encoding encoding, MakeKeyGrbit grbit)
        {
            CheckEncodingIsValid(encoding);

            if (null == data)
            {
                Api.JetMakeKey(sesid, tableid, null, 0, grbit);
            }
            else if (0 == data.Length)
            {
                Api.JetMakeKey(sesid, tableid, null, 0, grbit | MakeKeyGrbit.KeyDataZeroLength);
            }
            else if (Encoding.Unicode == encoding)
            {
                // Optimization for Unicode strings
                unsafe
                {
                    fixed (char* buffer = data)
                    {
                        Api.JetMakeKey(sesid, tableid, (IntPtr) buffer, data.Length * sizeof(char), grbit);
                    }
                }
            }
            else
            {
                byte[] bytes = encoding.GetBytes(data);
                Api.JetMakeKey(sesid, tableid, bytes, bytes.Length, grbit);
            }
        }

 /// <summary>
 /// Initializes a new instance of the Table class. The table is
 /// opened from the given database.
 /// </summary>
 /// <param name="sesid">The session to use.</param>
 /// <param name="dbid">The database to open the table in.</param>
 /// <param name="name">The name of the table.</param>
 /// <param name="grbit">JetOpenTable options.</param>
 public Table(JET_SESID sesid, JET_DBID dbid, string name, OpenTableGrbit grbit)
 {
     this.sesid = sesid;
     this.name = name;
     Api.JetOpenTable(this.sesid, dbid, this.name, null, 0, grbit, out this.tableid);
     this.ResourceWasAllocated();
 }

        /// <summary>
        /// Retrieves a single column value from the current record. The record is that
        /// record associated with the index entry at the current position of the cursor.
        /// Alternatively, this function can retrieve a column from a record being created
        /// in the cursor copy buffer. This function can also retrieve column data from an
        /// index entry that references the current record. In addition to retrieving the
        /// actual column value, JetRetrieveColumn can also be used to retrieve the size
        /// of a column, before retrieving the column data itself so that application
        /// buffers can be sized appropriately.  
        /// </summary>
        /// <remarks>
        /// This is an internal method that takes a buffer offset as well as size.
        /// </remarks>
        /// <param name="sesid">The session to use.</param>
        /// <param name="tableid">The cursor to retrieve the column from.</param>
        /// <param name="columnid">The columnid to retrieve.</param>
        /// <param name="data">The data buffer to be retrieved into.</param>
        /// <param name="dataSize">The size of the data buffer.</param>
        /// <param name="dataOffset">Offset into the data buffer to read data into.</param>
        /// <param name="actualDataSize">Returns the actual size of the data buffer.</param>
        /// <param name="grbit">Retrieve column options.</param>
        /// <param name="retinfo">
        /// If pretinfo is give as NULL then the function behaves as though an itagSequence
        /// of 1 and an ibLongValue of 0 (zero) were given. This causes column retrieval to
        /// retrieve the first value of a multi-valued column, and to retrieve long data at
        /// offset 0 (zero).
        /// </param>
        /// <returns>An ESENT warning code.</returns>
        public static JET_wrn JetRetrieveColumn(JET_SESID sesid, JET_TABLEID tableid, JET_COLUMNID columnid, byte[] data, int dataSize, int dataOffset, out int actualDataSize, RetrieveColumnGrbit grbit, JET_RETINFO retinfo)
        {
            if (dataOffset < 0
                || (null != data && 0 != dataSize && dataOffset >= data.Length)
                || (null == data && dataOffset != 0))
            {
                throw new ArgumentOutOfRangeException(
                    "dataOffset",
                    dataOffset,
                    "must be inside the data buffer");
            }

            if ((null == data && dataSize > 0) || (null != data && dataSize > data.Length))
            {
                throw new ArgumentOutOfRangeException(
                    "dataSize",
                    dataSize,
                    "cannot be greater than the length of the data");
            }

            unsafe
            {
                fixed (byte* pointer = data)
                {
                    return Api.JetRetrieveColumn(
                        sesid, tableid, columnid, new IntPtr(pointer + dataOffset), dataSize, out actualDataSize, grbit, retinfo);
                }
            }
        }

		private static void CreateIndexingEtagsTable(JET_DBID dbid, JET_SESID session)
		{
			JET_TABLEID tableid;
			Api.JetCreateTable(session, dbid, "indexes_etag", 16, 100, out tableid);
			JET_COLUMNID columnid;

			Api.JetAddColumn(session, tableid, "key", new JET_COLUMNDEF
			{
				cbMax = 255,
				coltyp = JET_coltyp.Text,
				cp = JET_CP.Unicode,
				grbit = ColumndefGrbit.ColumnTagged
			}, null, 0, out columnid);

			var defaultValue = BitConverter.GetBytes(0);
			Api.JetAddColumn(session, tableid, "touches", new JET_COLUMNDEF
			{
				coltyp = JET_coltyp.Long,
				grbit = ColumndefGrbit.ColumnFixed | ColumndefGrbit.ColumnNotNULL | ColumndefGrbit.ColumnEscrowUpdate
			}, defaultValue, defaultValue.Length, out columnid);

			const string indexDef = "+key\0\0";
			Api.JetCreateIndex(session, tableid, "by_key", CreateIndexGrbit.IndexPrimary, indexDef, indexDef.Length,
							   100);
		}

 /// <summary>
 /// Sets a parameter on the provided session state, used for the lifetime of this session or until reset.
 /// </summary>
 /// <param name="sesid">The session to set the parameter on.</param>
 /// <param name="sesparamid">The ID of the session parameter to retrieve.</param>
 /// <param name="operationContext">An operation context to retrieve.</param>
 /// <seealso cref="JET_OPERATIONCONTEXT"/>
 public static void JetGetSessionParameter(
     JET_SESID sesid,
     JET_sesparam sesparamid,
     out JET_OPERATIONCONTEXT operationContext)
 {
     Api.Check(Api.Impl.JetGetSessionParameter(sesid, sesparamid, out operationContext));
 }

        /// <summary>
        /// The JetSetColumn function modifies a single column value in a modified record to be inserted or to
        /// update the current record. It can overwrite an existing value, add a new value to a sequence of
        /// values in a multi-valued column, remove a value from a sequence of values in a multi-valued column,
        /// or update all or part of a long value (a column of type <see cref="JET_coltyp.LongText"/>
        /// or <see cref="JET_coltyp.LongBinary"/>). 
        /// </summary>
        /// <remarks>
        /// This is an internal-only version of the API that takes a data buffer and an offset into the buffer.
        /// </remarks>
        /// <param name="sesid">The session which is performing the update.</param>
        /// <param name="tableid">The cursor to update. An update should be prepared.</param>
        /// <param name="columnid">The columnid to set.</param>
        /// <param name="data">The data to set.</param>
        /// <param name="dataSize">The size of data to set.</param>
        /// <param name="dataOffset">The offset in the data buffer to set data from.</param>
        /// <param name="grbit">SetColumn options.</param>
        /// <param name="setinfo">Used to specify itag or long-value offset.</param>
        /// <returns>A warning value.</returns>
        public static JET_wrn JetSetColumn(JET_SESID sesid, JET_TABLEID tableid, JET_COLUMNID columnid, byte[] data, int dataSize, int dataOffset, SetColumnGrbit grbit, JET_SETINFO setinfo)
        {
            if (dataOffset < 0
                || (null != data && 0 != dataSize && dataOffset >= data.Length)
                || (null == data && dataOffset != 0))
            {
                throw new ArgumentOutOfRangeException(
                    "dataOffset",
                    dataOffset,
                    "must be inside the data buffer");                    
            }

            if (null != data && dataSize > checked(data.Length - dataOffset) && (SetColumnGrbit.SizeLV != (grbit & SetColumnGrbit.SizeLV)))
            {
                throw new ArgumentOutOfRangeException(
                    "dataSize",
                    dataSize,
                    "cannot be greater than the length of the data (unless the SizeLV option is used)");
            }

            unsafe
            {
                fixed (byte* pointer = data)
                {
                    return Api.JetSetColumn(sesid, tableid, columnid, new IntPtr(pointer + dataOffset), dataSize, grbit, setinfo);
                }
            }
        }

        internal static void CreateTable(JET_SESID sesid, JET_DBID dbid)
        {
            JET_TABLEID tableid;
            Api.JetCreateTable(sesid, dbid, GeometryTableName, 8, 80, out tableid);

            using (var transaction = new Microsoft.Isam.Esent.Interop.Transaction(sesid))
            {
                JET_COLUMNID columnid;

                var columndef = new JET_COLUMNDEF
                {
                    coltyp = JET_coltyp.Long,
                    grbit = ColumndefGrbit.ColumnAutoincrement
                };

                Api.JetAddColumn(sesid, tableid, colNameGeometryLabel, columndef, null, 0, out columnid);

                columndef.grbit = ColumndefGrbit.ColumnNotNULL;

                Api.JetAddColumn(sesid, tableid, colNameProductLabel, columndef, null, 0, out columnid);

                columndef.coltyp = JET_coltyp.UnsignedByte;
                Api.JetAddColumn(sesid, tableid, colNameGeomType, columndef, null, 0, out columnid);
                
                columndef.coltyp = JET_coltyp.Short;
                Api.JetAddColumn(sesid, tableid, colNameProductIfcTypeId, columndef, null, 0, out columnid);
                Api.JetAddColumn(sesid, tableid, colNameSubPart, columndef, null, 0, out columnid);
               

                columndef.coltyp = JET_coltyp.Binary;
                columndef.grbit = ColumndefGrbit.ColumnMaybeNull;
                Api.JetAddColumn(sesid, tableid, colNameTransformMatrix, columndef, null, 0, out columnid);
               
                columndef.coltyp = JET_coltyp.LongBinary;
                //if (EsentVersion.SupportsWindows7Features)
                //    columndef.grbit |= Windows7Grbits.ColumnCompressed;
                Api.JetAddColumn(sesid, tableid, colNameShapeData, columndef, null, 0, out columnid);

                columndef.coltyp = JET_coltyp.Long;
                columndef.grbit = ColumndefGrbit.ColumnNotNULL;
                Api.JetAddColumn(sesid, tableid, colNameGeometryHash, columndef, null, 0, out columnid);
                columndef.grbit = ColumndefGrbit.ColumnNotNULL;
                Api.JetAddColumn(sesid, tableid, colNameStyleLabel, columndef, null, 0, out columnid);
                // The primary index is the type and the entity label.
                string indexDef = string.Format("+{0}\0\0", colNameGeometryLabel);
                Api.JetCreateIndex(sesid, tableid, geometryTablePrimaryIndex, CreateIndexGrbit.IndexPrimary, indexDef, indexDef.Length, 100);
                //create index by geometry hashes    
                indexDef = string.Format("+{0}\0\0", colNameGeometryHash);
                Api.JetCreateIndex(sesid, tableid, geometryTableHashIndex, CreateIndexGrbit.IndexDisallowNull, indexDef, indexDef.Length, 100);
                //Create index by product
                indexDef = string.Format("+{0}\0{1}\0{2}\0{3}\0{4}\0\0", colNameGeomType, colNameProductIfcTypeId, colNameProductLabel, colNameSubPart, colNameStyleLabel);
                Api.JetCreateIndex(sesid, tableid, geometryTableGeomTypeIndex, CreateIndexGrbit.IndexUnique, indexDef, indexDef.Length, 100);
                //create index by style
                indexDef = string.Format("+{0}\0{1}\0{2}\0{3}\0{4}\0\0", colNameGeomType, colNameStyleLabel, colNameProductIfcTypeId, colNameProductLabel, colNameGeometryLabel);
                Api.JetCreateIndex(sesid, tableid, geometryTableStyleIndex, CreateIndexGrbit.None, indexDef, indexDef.Length, 100);
                Api.JetCloseTable(sesid, tableid);
                transaction.Commit(CommitTransactionGrbit.LazyFlush);
            }
           
        }

        public bool Add(JET_SESID session, JET_TABLEID table, int level)
        {
            byte[] buffer;
            int actualBookmarkSize;

            var largeBuffer = IndexReaderBuffers.Buffers.TakeBuffer(bookmarkMost);
            try
            {
                Api.JetGetBookmark(session, table, largeBuffer,
                                   largeBuffer.Length, out actualBookmarkSize);

                buffer = new byte[actualBookmarkSize];
                Buffer.BlockCopy(largeBuffer, 0, buffer, 0, actualBookmarkSize);
            }
            finally
            {
                IndexReaderBuffers.Buffers.ReturnBuffer(largeBuffer);
            }
            var res = itemsToDelete.TryAdd(new Key(buffer, actualBookmarkSize));
            if (res)
            {
                itemsToDeletePerViewAndLevel.DecrementPerLevelCounters(level);
            }
            return res;
        }

        public void Create(JET_SESID session, JET_DBID dbid)
        {
            using (var tran = new Transaction(session))
            {
                JET_TABLEID tblID;
                Api.JetCreateTable(session, dbid, tableName, 1, 80, out tblID);

                JET_COLUMNID c;
                Api.JetAddColumn(session, tblID, colName_ID, new JET_COLUMNDEF()
                {
                    coltyp = JET_coltyp.Currency,
                    grbit = ColumndefGrbit.ColumnAutoincrement | ColumndefGrbit.ColumnFixed | ColumndefGrbit.ColumnNotNULL,
                }, null, 0, out c);

                Api.JetAddColumn(session, tblID, colName_LogID, new JET_COLUMNDEF()
                {
                    coltyp = JET_coltyp.Currency,
                    grbit = ColumndefGrbit.ColumnFixed | ColumndefGrbit.ColumnNotNULL,
                }, null, 0, out c);

                var indexDef = "+" + colName_ID + "\0\0";
                Api.JetCreateIndex(session, tblID, idxName_Primary, CreateIndexGrbit.IndexPrimary, indexDef, indexDef.Length, 80);

                tran.Commit(CommitTransactionGrbit.None);
            }
        }

            private JET_DBID OpenExistingDatabase(JET_SESID session, string databaseFile)
            {
                JET_DBID databaseId;
                Api.JetOpenDatabase(SessionId, databaseFile, null, out databaseId, OpenDatabaseGrbit.None);

                return databaseId;
            }

        /// <summary>
        /// Intersect a group of index ranges and return the bookmarks of the records which are found
        /// in all the index ranges. 
        /// Also see <see cref="JetIntersectIndexes"/>.
        /// </summary>
        /// <param name="sesid">The session to use.</param>
        /// <param name="tableids">
        /// The tableids to use. Each tableid must be from a different index on the same table and
        /// have an active index range. Use <see cref="JetSetIndexRange"/>
        /// to create an index range.
        /// </param>
        /// <returns>
        /// The bookmarks of the records which are found in all the index ranges. The bookmarks 
        /// are returned in primary key order.
        /// </returns>
        public static IEnumerable<byte[]> IntersectIndexes(JET_SESID sesid, params JET_TABLEID[] tableids)
        {
            if (null == tableids)
            {
                throw new ArgumentNullException("tableids");
            }

            JET_RECORDLIST recordlist;

            var ranges = new JET_INDEXRANGE[tableids.Length];
            for (int i = 0; i < tableids.Length; ++i)
            {
                ranges[i] = new JET_INDEXRANGE { tableid = tableids[i] };
            }

            Api.JetIntersectIndexes(sesid, ranges, ranges.Length, out recordlist, IntersectIndexesGrbit.None);

            try
            {
                Api.MoveBeforeFirst(sesid, recordlist.tableid);
                while (Api.TryMoveNext(sesid, recordlist.tableid))
                {
                    yield return Api.RetrieveColumn(sesid, recordlist.tableid, recordlist.columnidBookmark);
                }
            }
            finally
            {
                Api.JetCloseTable(sesid, recordlist.tableid);
            }
        }

            public override void Create(JET_SESID sessionId, JET_DBID databaseId)
            {
                var idColumnCreate = CreateAutoIncrementIdColumn(IdColumnName);
                var identifierColumnCreate = CreateTextColumn(IdentifierColumnName);

                var columns = new JET_COLUMNCREATE[] { idColumnCreate, identifierColumnCreate };

                var primaryIndexKey = CreateIndexKey(IdColumnName);
                var identifierIndexKey = CreateIndexKey(IdentifierColumnName);

                var indexes = new JET_INDEXCREATE[]
                {
                    CreatePrimaryIndex(primaryIndexKey),
                    CreateUniqueTextIndex(IdentifierIndexName, identifierIndexKey)
                };

                var tableCreate = CreateTable(TableName, columns, indexes);

                Api.JetCreateTableColumnIndex3(sessionId, databaseId, tableCreate);

                _idColumnId = idColumnCreate.columnid;
                _identifierColumnId = identifierColumnCreate.columnid;

                Api.JetCloseTable(sessionId, tableCreate.tableid);
            }

        /// <summary>
        /// Constructs a search key that may then be used by <see cref="JetSeek"/>
        /// and <see cref="JetSetIndexRange"/>.
        /// </summary>
        /// <param name="sesid">The session to use.</param>
        /// <param name="tableid">The cursor to create the key on.</param>
        /// <param name="data">Column data for the current key column of the current index.</param>
        /// <param name="encoding">The encoding used to convert the string.</param>
        /// <param name="grbit">Key options.</param>
        public static void MakeKey(JET_SESID sesid, JET_TABLEID tableid, string data, Encoding encoding, MakeKeyGrbit grbit)
        {
            CheckEncodingIsValid(encoding);

            if (null == data)
            {
                Api.JetMakeKey(sesid, tableid, null, 0, grbit);
            }
            else if (0 == data.Length)
            {
                Api.JetMakeKey(sesid, tableid, null, 0, grbit | MakeKeyGrbit.KeyDataZeroLength);
            }
            else if (Encoding.Unicode == encoding)
            {
                // Optimization for Unicode strings
                unsafe
                {
                    fixed (char* buffer = data)
                    {
                        Api.JetMakeKey(sesid, tableid, new IntPtr(buffer), checked(data.Length * sizeof(char)), grbit);
                    }
                }
            }
            else
            {
            #if MANAGEDESENT_ON_WSA
                // Encoding.GetBytes(char*, int, byte*, int) overload is missing in new Windows UI.
                // So we can't use the ColumnCache. We'll just use a different GetBytes() overload.
                byte[] buffer = encoding.GetBytes(data);
                Api.JetMakeKey(sesid, tableid, buffer, buffer.Length, grbit);
            #else
                // Convert the string using a cached column buffer. The column buffer is far larger
                // than the maximum key size, so any data truncation here won't matter.
                byte[] buffer = null;
                try
                {
                    buffer = Caches.ColumnCache.Allocate();
                    int dataSize;
                    unsafe
                    {
                        fixed (char* chars = data)
                        fixed (byte* bytes = buffer)
                        {
                            dataSize = encoding.GetBytes(chars, data.Length, bytes, buffer.Length);
                        }
                    }

                    JetMakeKey(sesid, tableid, buffer, dataSize, grbit);
                }
                finally
                {
                    if (buffer != null)
                    {
                        Caches.ColumnCache.Free(ref buffer);
                    }
                }
            #endif
            }
        }