marketbasedanalysisdatabase.cs

一个经典的apriori算法（c#实现）

                base.OnRowChanged(e);
                if ((this.ItemsetTableRowChanged != null)) {
                    this.ItemsetTableRowChanged(this, new ItemsetTableRowChangeEvent(((ItemsetTableRow)(e.Row)), e.Action));
                }
            }
            
            protected override void OnRowChanging(DataRowChangeEventArgs e) {
                base.OnRowChanging(e);
                if ((this.ItemsetTableRowChanging != null)) {
                    this.ItemsetTableRowChanging(this, new ItemsetTableRowChangeEvent(((ItemsetTableRow)(e.Row)), e.Action));
                }
            }
            
            protected override void OnRowDeleted(DataRowChangeEventArgs e) {
                base.OnRowDeleted(e);
                if ((this.ItemsetTableRowDeleted != null)) {
                    this.ItemsetTableRowDeleted(this, new ItemsetTableRowChangeEvent(((ItemsetTableRow)(e.Row)), e.Action));
                }
            }
            
            protected override void OnRowDeleting(DataRowChangeEventArgs e) {
                base.OnRowDeleting(e);
                if ((this.ItemsetTableRowDeleting != null)) {
                    this.ItemsetTableRowDeleting(this, new ItemsetTableRowChangeEvent(((ItemsetTableRow)(e.Row)), e.Action));
                }
            }
            
            public void RemoveItemsetTableRow(ItemsetTableRow row) {
                this.Rows.Remove(row);
            }
        }
        
        [System.Diagnostics.DebuggerStepThrough()]
        public class ItemsetTableRow : DataRow {
            
            private ItemsetTableDataTable tableItemsetTable;
            
            internal ItemsetTableRow(DataRowBuilder rb) : 
                    base(rb) {
                this.tableItemsetTable = ((ItemsetTableDataTable)(this.Table));
            }
            
            public int ItemID {
                get {
                    return ((int)(this[this.tableItemsetTable.ItemIDColumn]));
                }
                set {
                    this[this.tableItemsetTable.ItemIDColumn] = value;
                }
            }
            
            public string Itemset {
                get {
                    return ((string)(this[this.tableItemsetTable.ItemsetColumn]));
                }
                set {
                    this[this.tableItemsetTable.ItemsetColumn] = value;
                }
            }
            
            public int Level {
                get {
                    try {
                        return ((int)(this[this.tableItemsetTable.LevelColumn]));
                    }
                    catch (InvalidCastException e) {
                        throw new StrongTypingException("Cannot get value because it is DBNull.", e);
                    }
                }
                set {
                    this[this.tableItemsetTable.LevelColumn] = value;
                }
            }
            
            public int SupportCount {
                get {
                    try {
                        return ((int)(this[this.tableItemsetTable.SupportCountColumn]));
                    }
                    catch (InvalidCastException e) {
                        throw new StrongTypingException("Cannot get value because it is DBNull.", e);
                    }
                }
                set {
                    this[this.tableItemsetTable.SupportCountColumn] = value;
                }
            }
            
            public bool IsLevelNull() {
                return this.IsNull(this.tableItemsetTable.LevelColumn);
            }
            
            public void SetLevelNull() {
                this[this.tableItemsetTable.LevelColumn] = System.Convert.DBNull;
            }
            
            public bool IsSupportCountNull() {
                return this.IsNull(this.tableItemsetTable.SupportCountColumn);
            }
            
            public void SetSupportCountNull() {
                this[this.tableItemsetTable.SupportCountColumn] = System.Convert.DBNull;
            }
        }
        
        [System.Diagnostics.DebuggerStepThrough()]
        public class ItemsetTableRowChangeEvent : EventArgs {
            
            private ItemsetTableRow eventRow;
            
            private DataRowAction eventAction;
            
            public ItemsetTableRowChangeEvent(ItemsetTableRow row, DataRowAction action) {
                this.eventRow = row;
                this.eventAction = action;
            }
            
            public ItemsetTableRow Row {
                get {
                    return this.eventRow;
                }
            }
            
            public DataRowAction Action {
                get {
                    return this.eventAction;
                }
            }
        }
        
        [System.Diagnostics.DebuggerStepThrough()]
        public class SubsetTableDataTable : DataTable, System.Collections.IEnumerable {
            
            private DataColumn columnFirstKeyID;
            
            private DataColumn columnItemID;
            
            private DataColumn columnSubsetID;
            
            internal SubsetTableDataTable() : 
                    base("SubsetTable") {
                this.InitClass();
            }
            
            internal SubsetTableDataTable(DataTable table) : 
                    base(table.TableName) {
                if ((table.CaseSensitive != table.DataSet.CaseSensitive)) {
                    this.CaseSensitive = table.CaseSensitive;
                }
                if ((table.Locale.ToString() != table.DataSet.Locale.ToString())) {
                    this.Locale = table.Locale;
                }
                if ((table.Namespace != table.DataSet.Namespace)) {
                    this.Namespace = table.Namespace;
                }
                this.Prefix = table.Prefix;
                this.MinimumCapacity = table.MinimumCapacity;
                this.DisplayExpression = table.DisplayExpression;
            }
            
            [System.ComponentModel.Browsable(false)]
            public int Count {
                get {
                    return this.Rows.Count;
                }
            }
            
            internal DataColumn FirstKeyIDColumn {
                get {
                    return this.columnFirstKeyID;
                }
            }
            
            internal DataColumn ItemIDColumn {
                get {
                    return this.columnItemID;
                }
            }
            
            internal DataColumn SubsetIDColumn {
                get {
                    return this.columnSubsetID;
                }
            }
            
            public SubsetTableRow this[int index] {
                get {
                    return ((SubsetTableRow)(this.Rows[index]));
                }
            }
            
            public event SubsetTableRowChangeEventHandler SubsetTableRowChanged;
            
            public event SubsetTableRowChangeEventHandler SubsetTableRowChanging;
            
            public event SubsetTableRowChangeEventHandler SubsetTableRowDeleted;
            
            public event SubsetTableRowChangeEventHandler SubsetTableRowDeleting;
            
            public void AddSubsetTableRow(SubsetTableRow row) {
                this.Rows.Add(row);
            }
            
            public SubsetTableRow AddSubsetTableRow(int ItemID, int SubsetID) {
                SubsetTableRow rowSubsetTableRow = ((SubsetTableRow)(this.NewRow()));
                rowSubsetTableRow.ItemArray = new object[] {
                        null,
                        ItemID,
                        SubsetID};
                this.Rows.Add(rowSubsetTableRow);
                return rowSubsetTableRow;
            }
            
            public SubsetTableRow FindByFirstKeyIDItemIDSubsetID(int FirstKeyID, int ItemID, int SubsetID) {
                return ((SubsetTableRow)(this.Rows.Find(new object[] {
                            FirstKeyID,
                            ItemID,
                            SubsetID})));
            }
            
            public System.Collections.IEnumerator GetEnumerator() {
                return this.Rows.GetEnumerator();
            }
            
            public override DataTable Clone() {
                SubsetTableDataTable cln = ((SubsetTableDataTable)(base.Clone()));
                cln.InitVars();
                return cln;
            }
            
            protected override DataTable CreateInstance() {
                return new SubsetTableDataTable();
            }
            
            internal void InitVars() {
                this.columnFirstKeyID = this.Columns["FirstKeyID"];
                this.columnItemID = this.Columns["ItemID"];
                this.columnSubsetID = this.Columns["SubsetID"];
            }
            
            private void InitClass() {
                this.columnFirstKeyID = new DataColumn("FirstKeyID", typeof(int), null, System.Data.MappingType.Element);
                this.Columns.Add(this.columnFirstKeyID);
                this.columnItemID = new DataColumn("ItemID", typeof(int), null, System.Data.MappingType.Element);
                this.Columns.Add(this.columnItemID);
                this.columnSubsetID = new DataColumn("SubsetID", typeof(int), null, System.Data.MappingType.Element);
                this.Columns.Add(this.columnSubsetID);
                this.Constraints.Add(new UniqueConstraint("Constraint1", new DataColumn[] {
                                this.columnFirstKeyID}, false));
                this.Constraints.Add(new UniqueConstraint("Constraint2", new DataColumn[] {
                                this.columnFirstKeyID,
                                this.columnItemID,
                                this.columnSubsetID}, true));
                this.columnFirstKeyID.AutoIncrement = true;
                this.columnFirstKeyID.AutoIncrementSeed = 1;
                this.columnFirstKeyID.AllowDBNull = false;
                this.columnFirstKeyID.Unique = true;
                this.columnItemID.AllowDBNull = false;
                this.columnSubsetID.AllowDBNull = false;
            }
            
            public SubsetTableRow NewSubsetTableRow() {
                return ((SubsetTableRow)(this.NewRow()));
            }
            
            protected override DataRow NewRowFromBuilder(DataRowBuilder builder) {
                return new SubsetTableRow(builder);
            }
            
            protected override System.Type GetRowType() {
                return typeof(SubsetTableRow);
            }
            
            protected override void OnRowChanged(DataRowChangeEventArgs e) {
                base.OnRowChanged(e);
                if ((this.SubsetTableRowChanged != null)) {
                    this.SubsetTableRowChanged(this, new SubsetTableRowChangeEvent(((SubsetTableRow)(e.Row)), e.Action));
                }
            }
            
            protected override void OnRowChanging(DataRowChangeEventArgs e) {
                base.OnRowChanging(e);
                if ((this.SubsetTableRowChanging != null)) {
                    this.SubsetTableRowChanging(this, new SubsetTableRowChangeEvent(((SubsetTableRow)(e.Row)), e.Action));
                }
            }
            
            protected override void OnRowDeleted(DataRowChangeEventArgs e) {
                base.OnRowDeleted(e);
                if ((this.SubsetTableRowDeleted != null)) {
                    this.SubsetTableRowDeleted(this, new SubsetTableRowChangeEvent(((SubsetTableRow)(e.Row)), e.Action));
                }
            }
            
            protected override void OnRowDeleting(DataRowChangeEventArgs e) {
                base.OnRowDeleting(e);
                if ((this.SubsetTableRowDeleting != null)) {
                    this.SubsetTableRowDeleting(this, new SubsetTableRowChangeEvent(((SubsetTableRow)(e.Row)), e.Action));
                }
            }
            
            public void RemoveSubsetTableRow(SubsetTableRow row) {
                this.Rows.Remove(row);
            }
        }
        
        [System.Diagnostics.DebuggerStepThrough()]
        public class SubsetTableRow : DataRow {
            
            private SubsetTableDataTable tableSubsetTable;
            
            internal SubsetTableRow(DataRowBuilder rb) : 
                    base(rb) {
                this.tableSubsetTable = ((SubsetTableDataTable)(this.Table));
            }
            
            public int FirstKeyID {
                get {
                    return ((int)(this[this.tableSubsetTable.FirstKeyIDColumn]));
                }
                set {
                    this[this.tableSubsetTable.FirstKeyIDColumn] = value;
                }
            }
            
            public int ItemID {
                get {
                    return ((int)(this[this.tableSubsetTable.ItemIDColumn]));
                }
                set {
                    this[this.tableSubsetTable.ItemIDColumn] = value;