DataAdapter.cs source code in C# .NET

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/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / Data / System / Data / Common / DataAdapter.cs / 1305376 / DataAdapter.cs

                            //------------------------------------------------------------------------------ 
// 
//      Copyright (c) Microsoft Corporation.  All rights reserved.
// 
// [....] 
// [....]
//----------------------------------------------------------------------------- 
 
namespace System.Data.Common {
 
    using System;
    using System.ComponentModel;
    using System.Data;
    using System.Data.ProviderBase; 
    using System.Diagnostics;
    using System.Globalization; 
    using System.Threading; 

    public class DataAdapter : Component, IDataAdapter { // V1.0.3300 

        static private readonly object EventFillError = new object();

        private bool _acceptChangesDuringUpdate = true; 
        private bool _acceptChangesDuringUpdateAfterInsert = true;
        private bool _continueUpdateOnError = false; 
        private bool _hasFillErrorHandler = false; 
        private bool _returnProviderSpecificTypes = false;
 
        private bool _acceptChangesDuringFill = true;
        private LoadOption _fillLoadOption;

        private MissingMappingAction _missingMappingAction = System.Data.MissingMappingAction.Passthrough; 
        private MissingSchemaAction _missingSchemaAction = System.Data.MissingSchemaAction.Add;
        private DataTableMappingCollection _tableMappings; 
 
        private static int _objectTypeCount; // Bid counter
        internal readonly int _objectID = System.Threading.Interlocked.Increment(ref _objectTypeCount); 

        protected DataAdapter() : base() { // V1.0.3300
            GC.SuppressFinalize(this);
        } 

        protected DataAdapter(DataAdapter from) : base() { // V1.1.3300 
            CloneFrom(from); 
        }
 
        [
        DefaultValue(true),
        ResCategoryAttribute(Res.DataCategory_Fill),
        ResDescriptionAttribute(Res.DataAdapter_AcceptChangesDuringFill), 
        ]
        public bool AcceptChangesDuringFill { // V1.0.3300 
            get { 
                //Bid.Trace(" %d#\n", ObjectID);
                return _acceptChangesDuringFill; 
            }
            set {
                _acceptChangesDuringFill = value;
                //Bid.Trace(" %d#, %d\n", ObjectID, value); 
            }
        } 
 
        [
        EditorBrowsableAttribute(EditorBrowsableState.Never) 
        ]
        virtual public bool ShouldSerializeAcceptChangesDuringFill() {
            return (0 == _fillLoadOption);
        } 

        [ 
        DefaultValue(true), 
        ResCategoryAttribute(Res.DataCategory_Update),
        ResDescriptionAttribute(Res.DataAdapter_AcceptChangesDuringUpdate), 
        ]
        public bool AcceptChangesDuringUpdate {  // V1.2.3300, MDAC 74988
            get {
                //Bid.Trace(" %d#\n", ObjectID); 
                return _acceptChangesDuringUpdate;
            } 
            set { 
                _acceptChangesDuringUpdate = value;
                //Bid.Trace(" %d#, %d\n", ObjectID, value); 
            }
        }

        [ 
        DefaultValue(false),
        ResCategoryAttribute(Res.DataCategory_Update), 
        ResDescriptionAttribute(Res.DataAdapter_ContinueUpdateOnError), 
        ]
        public bool ContinueUpdateOnError {  // V1.0.3300, MDAC 66900 
            get {
                //Bid.Trace(" %d#\n", ObjectID);
                return _continueUpdateOnError;
            } 
            set {
                _continueUpdateOnError = value; 
                //Bid.Trace(" %d#, %d\n", ObjectID, value); 
            }
        } 

        [
        RefreshProperties(RefreshProperties.All),
        ResCategoryAttribute(Res.DataCategory_Fill), 
        ResDescriptionAttribute(Res.DataAdapter_FillLoadOption),
        ] 
        public LoadOption FillLoadOption { // V1.2.3300 
            get {
                //Bid.Trace(" %d#\n", ObjectID); 
                LoadOption fillLoadOption = _fillLoadOption;
                return ((0 != fillLoadOption) ? _fillLoadOption : LoadOption.OverwriteChanges);
            }
            set { 
                switch(value) {
                case 0: // to allow simple resetting 
                case LoadOption.OverwriteChanges: 
                case LoadOption.PreserveChanges:
                case LoadOption.Upsert: 
                    _fillLoadOption = value;
                    //Bid.Trace(" %d#, %d{ds.LoadOption}\n", ObjectID, (int)value);
                    break;
                default: 
                    throw ADP.InvalidLoadOption(value);
                } 
            } 
        }
 
        [
        EditorBrowsableAttribute(EditorBrowsableState.Never)
        ]
        public void ResetFillLoadOption() { 
            _fillLoadOption = 0;
        } 
 
        [
        EditorBrowsableAttribute(EditorBrowsableState.Never) 
        ]
        virtual public bool ShouldSerializeFillLoadOption() {
            return (0 != _fillLoadOption);
        } 

        [ 
        DefaultValue(System.Data.MissingMappingAction.Passthrough), 
        ResCategoryAttribute(Res.DataCategory_Mapping),
        ResDescriptionAttribute(Res.DataAdapter_MissingMappingAction), 
        ]
        public MissingMappingAction MissingMappingAction { // V1.0.3300
            get {
                //Bid.Trace(" %d#\n", ObjectID); 
                return _missingMappingAction;
            } 
            set { 
                switch(value) { // @perfnote: Enum.IsDefined
                case MissingMappingAction.Passthrough: 
                case MissingMappingAction.Ignore:
                case MissingMappingAction.Error:
                    _missingMappingAction = value;
                    //Bid.Trace(" %d#, %d{ds.MissingMappingAction}\n", ObjectID, (int)value); 
                    break;
                default: 
                    throw ADP.InvalidMissingMappingAction(value); 
                }
            } 
        }

        [
        DefaultValue(Data.MissingSchemaAction.Add), 
        ResCategoryAttribute(Res.DataCategory_Mapping),
        ResDescriptionAttribute(Res.DataAdapter_MissingSchemaAction), 
        ] 
        public MissingSchemaAction MissingSchemaAction { // V1.0.3300
            get { 
                //Bid.Trace(" %d#\n", ObjectID);
                return _missingSchemaAction;
            }
            set { 
                switch(value) { // @perfnote: Enum.IsDefined
                case MissingSchemaAction.Add: 
                case MissingSchemaAction.Ignore: 
                case MissingSchemaAction.Error:
                case MissingSchemaAction.AddWithKey: 
                    _missingSchemaAction = value;
                    //Bid.Trace(" %d#, %d{MissingSchemaAction}\n", ObjectID, (int)value);
                    break;
                default: 
                    throw ADP.InvalidMissingSchemaAction(value);
                } 
            } 
        }
 
        internal int ObjectID {
            get {
                return _objectID;
            } 
        }
 
        [ 
        DefaultValue(false),
        ResCategoryAttribute(Res.DataCategory_Fill), 
        ResDescriptionAttribute(Res.DataAdapter_ReturnProviderSpecificTypes),
        ]
        virtual public bool ReturnProviderSpecificTypes {
            get { 
                //Bid.Trace(" %d#\n", ObjectID);
                return _returnProviderSpecificTypes; 
            } 
            set {
                _returnProviderSpecificTypes = value; 
                //Bid.Trace(" %d#, %d\n", ObjectID, (int)value);
            }
        }
 
        [
        DesignerSerializationVisibility(DesignerSerializationVisibility.Content), 
        ResCategoryAttribute(Res.DataCategory_Mapping), 
        ResDescriptionAttribute(Res.DataAdapter_TableMappings),
        ] 
        public DataTableMappingCollection TableMappings { // V1.0.3300
            get {
                //Bid.Trace(" %d#\n", ObjectID);
                DataTableMappingCollection mappings = _tableMappings; 
                if (null == mappings) {
                    mappings = CreateTableMappings(); 
                    if (null == mappings) { 
                        mappings = new DataTableMappingCollection();
                    } 
                    _tableMappings = mappings;
                }
                return mappings; // constructed by base class
            } 
        }
 
        ITableMappingCollection IDataAdapter.TableMappings { // V1.0.3300 
            get {
                return TableMappings; 
            }
        }

        virtual protected bool ShouldSerializeTableMappings() { // V1.0.3300, MDAC 65548 
            return true; /*HasTableMappings();*/ // VS7 300569
        } 
 
        protected bool HasTableMappings() { // V1.2.3300
            return ((null != _tableMappings) && (0 < TableMappings.Count)); 
        }

        [
        ResCategoryAttribute(Res.DataCategory_Fill), 
        ResDescriptionAttribute(Res.DataAdapter_FillError),
        ] 
        public event FillErrorEventHandler FillError { // V1.2.3300, DbDataADapter V1.0.3300 
            add {
                _hasFillErrorHandler = true; 
                Events.AddHandler(EventFillError, value);
            }
            remove {
                Events.RemoveHandler(EventFillError, value); 
            }
        } 
 
        [ Obsolete("CloneInternals() has been deprecated.  Use the DataAdapter(DataAdapter from) constructor.  http://go.microsoft.com/fwlink/?linkid=14202") ] // V1.1.3300, MDAC 81448
        [System.Security.Permissions.PermissionSetAttribute(System.Security.Permissions.SecurityAction.Demand, Name="FullTrust")] // MDAC 82936 
        virtual protected DataAdapter CloneInternals() { // V1.0.3300
            DataAdapter clone = (DataAdapter)Activator.CreateInstance(GetType(), System.Reflection.BindingFlags.Public|System.Reflection.BindingFlags.Instance, null, null, CultureInfo.InvariantCulture, null);
            clone.CloneFrom(this);
            return clone; 
        }
 
        private void CloneFrom(DataAdapter from) { 
            _acceptChangesDuringUpdate = from._acceptChangesDuringUpdate;
            _acceptChangesDuringUpdateAfterInsert = from._acceptChangesDuringUpdateAfterInsert; 
            _continueUpdateOnError = from._continueUpdateOnError;
            _returnProviderSpecificTypes = from._returnProviderSpecificTypes; // WebData 101795
            _acceptChangesDuringFill = from._acceptChangesDuringFill;
            _fillLoadOption = from._fillLoadOption; 
            _missingMappingAction = from._missingMappingAction;
            _missingSchemaAction = from._missingSchemaAction; 
 
            if ((null != from._tableMappings) && (0 < from.TableMappings.Count)) {
                DataTableMappingCollection parameters = this.TableMappings; 
                foreach(object parameter in from.TableMappings) {
                    parameters.Add((parameter is ICloneable) ? ((ICloneable)parameter).Clone() : parameter);
                }
            } 
        }
 
        virtual protected DataTableMappingCollection CreateTableMappings() { // V1.0.3300 
            Bid.Trace(" %d#\n", ObjectID);
            return new DataTableMappingCollection(); 
        }

        override protected void Dispose(bool disposing) { // V1.0.3300, MDAC 65459
            if (disposing) { // release mananged objects 
                _tableMappings = null;
            } 
            // release unmanaged objects 

            base.Dispose(disposing); // notify base classes 
        }

        virtual public DataTable[] FillSchema(DataSet dataSet, SchemaType schemaType) { // V1.0.3300
            throw ADP.NotSupported(); 
        }
 
        virtual protected DataTable[] FillSchema(DataSet dataSet, SchemaType schemaType, string srcTable, IDataReader dataReader) { // V1.2.3300 
            IntPtr hscp;
            Bid.ScopeEnter(out hscp, " %d#, dataSet, schemaType=%d{ds.SchemaType}, srcTable, dataReader\n", ObjectID, (int)schemaType); 
            try {
                if (null == dataSet) {
                    throw ADP.ArgumentNull("dataSet");
                } 
                if ((SchemaType.Source != schemaType) && (SchemaType.Mapped != schemaType)) {
                    throw ADP.InvalidSchemaType(schemaType); 
                } 
                if (ADP.IsEmpty(srcTable)) {
                    throw ADP.FillSchemaRequiresSourceTableName("srcTable"); 
                }
                if ((null == dataReader) || dataReader.IsClosed) {
                    throw ADP.FillRequires("dataReader");
                } 
                // user must Close/Dispose of the dataReader
                object value = FillSchemaFromReader(dataSet, null, schemaType, srcTable, dataReader); 
                return (DataTable[]) value; 
            }
            finally { 
                Bid.ScopeLeave(ref hscp);
            }
        }
 
        virtual protected DataTable FillSchema(DataTable dataTable, SchemaType schemaType, IDataReader dataReader) { // V1.2.3300
            IntPtr hscp; 
            Bid.ScopeEnter(out hscp, " %d#, dataTable, schemaType, dataReader\n", ObjectID); 
            try {
                if (null == dataTable) { 
                    throw ADP.ArgumentNull("dataTable");
                }
                if ((SchemaType.Source != schemaType) && (SchemaType.Mapped != schemaType)) {
                    throw ADP.InvalidSchemaType(schemaType); 
                }
                if ((null == dataReader) || dataReader.IsClosed) { 
                    throw ADP.FillRequires("dataReader"); 
                }
                // user must Close/Dispose of the dataReader 
                // user will have to call NextResult to access remaining results
                object value = FillSchemaFromReader(null, dataTable, schemaType, null, dataReader);
                return (DataTable) value;
            } 
            finally {
                Bid.ScopeLeave(ref hscp); 
            } 
        }
 
        internal object FillSchemaFromReader(DataSet dataset, DataTable datatable, SchemaType schemaType, string srcTable, IDataReader dataReader) {
            DataTable[] dataTables = null;
            int schemaCount = 0;
            do { 
                DataReaderContainer readerHandler = DataReaderContainer.Create(dataReader, ReturnProviderSpecificTypes);
 
                if (0 >= readerHandler.FieldCount) { 
                    continue;
                } 
                string tmp = null;
                if (null != dataset) {
                    tmp = DataAdapter.GetSourceTableName(srcTable, schemaCount);
                    schemaCount++; // don't increment if no SchemaTable ( a non-row returning result ) 
                }
 
                SchemaMapping mapping = new SchemaMapping(this, dataset, datatable, readerHandler, true, schemaType, tmp, false, null, null); 

                if (null != datatable) { 
                    // do not read remaining results in single DataTable case
                    return mapping.DataTable;
                }
                else if (null != mapping.DataTable) { 
                    if (null == dataTables) {
                        dataTables = new DataTable[1] { mapping.DataTable }; 
                    } 
                    else {
                        dataTables = DataAdapter.AddDataTableToArray(dataTables, mapping.DataTable); 
                    }
                }
            } while (dataReader.NextResult()); // FillSchema does not capture errors for FillError event
 
            object value = dataTables;
            if ((null == value) && (null == datatable)) { // WebData 101757 
                value = new DataTable[0]; 
            }
            return value; // null if datatable had no results 
        }

        virtual public int Fill(DataSet dataSet) { // V1.0.3300
            throw ADP.NotSupported(); 
        }
 
        virtual protected int Fill(DataSet dataSet, string srcTable, IDataReader dataReader, int startRecord, int maxRecords) { // V1.2.3300, DbDataAdapter V1.0.3300 
            IntPtr hscp;
            Bid.ScopeEnter(out hscp, " %d#, dataSet, srcTable, dataReader, startRecord, maxRecords\n", ObjectID); 
            try {
                if (null == dataSet) {
                    throw ADP.FillRequires("dataSet");
                } 
                if (ADP.IsEmpty(srcTable)) {
                    throw ADP.FillRequiresSourceTableName("srcTable"); 
                } 
                if (null == dataReader) {
                    throw ADP.FillRequires("dataReader"); 
                }
                if (startRecord < 0) {
                    throw ADP.InvalidStartRecord("startRecord", startRecord);
                } 
                if (maxRecords < 0) {
                    throw ADP.InvalidMaxRecords("maxRecords", maxRecords); 
                } 
                if (dataReader.IsClosed) {
                    return 0; 
                }
                // user must Close/Dispose of the dataReader
                DataReaderContainer readerHandler = DataReaderContainer.Create(dataReader, ReturnProviderSpecificTypes);
                return FillFromReader(dataSet, null, srcTable, readerHandler, startRecord, maxRecords, null, null); 
            }
            finally { 
                Bid.ScopeLeave(ref hscp); 
            }
        } 

        virtual protected int Fill(DataTable dataTable, IDataReader dataReader) { // V1.2.3300, DbDataADapter V1.0.3300
            DataTable[] dataTables = new DataTable[] { dataTable };
            return Fill(dataTables, dataReader, 0, 0); 
        }
 
        virtual protected int Fill(DataTable[] dataTables, IDataReader dataReader, int startRecord, int maxRecords) { // V1.2.3300 
            IntPtr hscp;
            Bid.ScopeEnter(out hscp, " %d#, dataTables[], dataReader, startRecord, maxRecords\n", ObjectID); 
            try {
                ADP.CheckArgumentLength(dataTables, "tables");
                if ((null == dataTables) || (0 == dataTables.Length) || (null == dataTables[0])) {
                    throw ADP.FillRequires("dataTable"); 
                }
                if (null == dataReader) { 
                    throw ADP.FillRequires("dataReader"); 
                }
                if ((1 < dataTables.Length) && ((0 != startRecord) || (0 != maxRecords))) { 
                    throw ADP.NotSupported(); // FillChildren is not supported with FillPage
                }

 
                int result = 0;
                bool enforceContraints = false; 
                DataSet commonDataSet = dataTables[0].DataSet; 
                try {
                    if (null != commonDataSet) { 
                        enforceContraints = commonDataSet.EnforceConstraints;
                        commonDataSet.EnforceConstraints = false;
                    }
                    for(int i = 0; i < dataTables.Length; ++i) { 
                        Debug.Assert(null != dataTables[i], "null DataTable Fill");
 
                        if (dataReader.IsClosed) { 
                            break;
                        } 
                        DataReaderContainer readerHandler = DataReaderContainer.Create(dataReader, ReturnProviderSpecificTypes);
                        if (readerHandler.FieldCount <= 0) {
                            continue;
                        } 
                        if ((0 < i) && !FillNextResult(readerHandler)) {
                            break; 
                        } 
                        // user must Close/Dispose of the dataReader
                        // user will have to call NextResult to access remaining results 
                        int count = FillFromReader(null, dataTables[i], null, readerHandler, startRecord, maxRecords, null, null);
                        if (0 == i) {
                            result = count;
                        } 
                    }
                } 
                catch(ConstraintException) { 
                    enforceContraints = false;
                    throw; 
                }
                finally {
                    if (enforceContraints) {
                        commonDataSet.EnforceConstraints = true; 
                    }
                } 
                return result; 
            }
            finally { 
                Bid.ScopeLeave(ref hscp);
            }
        }
 
        internal int FillFromReader(DataSet dataset, DataTable datatable, string srcTable, DataReaderContainer dataReader, int startRecord, int maxRecords, DataColumn parentChapterColumn, object parentChapterValue) {
            int rowsAddedToDataSet = 0; 
            int schemaCount = 0; 
            do {
                if (0 >= dataReader.FieldCount) { 
                    continue; // loop to next result
                }

                SchemaMapping mapping = FillMapping(dataset, datatable, srcTable, dataReader, schemaCount, parentChapterColumn, parentChapterValue); 
                schemaCount++; // don't increment if no SchemaTable ( a non-row returning result )
 
                if (null == mapping) { 
                    continue; // loop to next result
                } 
                if (null == mapping.DataValues) {
                    continue; // loop to next result
                }
                if (null == mapping.DataTable) { 
                    continue; // loop to next result
                } 
                mapping.DataTable.BeginLoadData(); 
                try {
                    // startRecord and maxRecords only apply to the first resultset 
                    if ((1 == schemaCount) && ((0 < startRecord) || (0 < maxRecords))) {
                        rowsAddedToDataSet = FillLoadDataRowChunk(mapping, startRecord, maxRecords);
                    }
                    else { 
                        int count = FillLoadDataRow(mapping);
 
                        if (1 == schemaCount) { // MDAC 71347 
                            // only return LoadDataRow count for first resultset
                            // not secondary or chaptered results 
                            rowsAddedToDataSet = count;
                        }
                    }
                } 
                finally {
                    mapping.DataTable.EndLoadData(); 
                } 
                if (null != datatable) {
                    break; // do not read remaining results in single DataTable case 
                }
            } while (FillNextResult(dataReader));

            return rowsAddedToDataSet; 
        }
 
        private int FillLoadDataRowChunk(SchemaMapping mapping, int startRecord, int maxRecords) { 
            DataReaderContainer dataReader = mapping.DataReader;
 
            while (0 < startRecord) {
                if (!dataReader.Read()) {
                    // there are no more rows on first resultset
                    return 0; 
                }
                --startRecord; 
            } 

            int rowsAddedToDataSet = 0; 
            if (0 < maxRecords) {
                while ((rowsAddedToDataSet < maxRecords) && dataReader.Read()) {
                    if (_hasFillErrorHandler) {
                        try { 
                            mapping.LoadDataRowWithClear();
                            rowsAddedToDataSet++; 
                        } 
                        catch(Exception e) {
                            // 
                            if (!ADP.IsCatchableExceptionType(e)) {
                                throw;
                            }
                            ADP.TraceExceptionForCapture(e); 
                            OnFillErrorHandler(e, mapping.DataTable, mapping.DataValues);
                        } 
                    } 
                    else {
                        mapping.LoadDataRow(); 
                        rowsAddedToDataSet++;
                    }
                }
                // skip remaining rows of the first resultset 
            }
            else { 
                rowsAddedToDataSet = FillLoadDataRow(mapping); 
            }
            return rowsAddedToDataSet; 
        }

        private int FillLoadDataRow(SchemaMapping mapping) {
            int rowsAddedToDataSet = 0; 
            DataReaderContainer dataReader = mapping.DataReader;
            if (_hasFillErrorHandler) { 
                while (dataReader.Read()) { // read remaining rows of first and subsequent resultsets 
                    try {
                        // only try-catch if a FillErrorEventHandler is registered so that 
                        // in the default case we get the full callstack from users
                        mapping.LoadDataRowWithClear();
                        rowsAddedToDataSet++;
                    } 
                    catch(Exception e) {
                        // 
                        if (!ADP.IsCatchableExceptionType(e)) { 
                            throw;
                        } 
                        ADP.TraceExceptionForCapture(e);
                        OnFillErrorHandler(e, mapping.DataTable, mapping.DataValues);
                    }
                } 
            }
            else { 
                while (dataReader.Read()) { // read remaining rows of first and subsequent resultset 
                    mapping.LoadDataRow();
                    rowsAddedToDataSet++; 
                }
            }
            return rowsAddedToDataSet;
        } 

        private SchemaMapping FillMappingInternal(DataSet dataset, DataTable datatable, string srcTable, DataReaderContainer dataReader, int schemaCount, DataColumn parentChapterColumn, object parentChapterValue) { 
            bool withKeyInfo = (Data.MissingSchemaAction.AddWithKey == MissingSchemaAction); 
            string tmp = null;
            if (null != dataset) { 
                tmp = DataAdapter.GetSourceTableName(srcTable, schemaCount);
            }
            return new SchemaMapping(this, dataset, datatable, dataReader, withKeyInfo, SchemaType.Mapped, tmp, true, parentChapterColumn, parentChapterValue);
        } 

        private SchemaMapping FillMapping(DataSet dataset, DataTable datatable, string srcTable, DataReaderContainer dataReader, int schemaCount, DataColumn parentChapterColumn, object parentChapterValue) { 
            SchemaMapping mapping = null; 
            if (_hasFillErrorHandler) {
                try { 
                    // only try-catch if a FillErrorEventHandler is registered so that
                    // in the default case we get the full callstack from users
                    mapping = FillMappingInternal(dataset, datatable, srcTable, dataReader, schemaCount, parentChapterColumn, parentChapterValue);
                } 
                catch(Exception e) {
                    // 
                    if (!ADP.IsCatchableExceptionType(e)) { 
                        throw;
                    } 
                    ADP.TraceExceptionForCapture(e);
                    OnFillErrorHandler(e, null, null);
                }
            } 
            else {
                mapping = FillMappingInternal(dataset, datatable, srcTable, dataReader, schemaCount, parentChapterColumn, parentChapterValue); 
            } 
            return mapping;
        } 

        private bool FillNextResult(DataReaderContainer dataReader) {
            bool result = true;
            if (_hasFillErrorHandler) { 
                try {
                    // only try-catch if a FillErrorEventHandler is registered so that 
                    // in the default case we get the full callstack from users 
                    result = dataReader.NextResult();
                } 
                catch(Exception e) {
                    //
                    if (!ADP.IsCatchableExceptionType(e)) {
                        throw; 
                    }
                    ADP.TraceExceptionForCapture(e); 
                    OnFillErrorHandler(e, null, null); 
                }
            } 
            else {
                result = dataReader.NextResult();
            }
            return result; 
        }
 
        [ EditorBrowsableAttribute(EditorBrowsableState.Advanced) ] // MDAC 69508 
        virtual public IDataParameter[] GetFillParameters() { // V1.0.3300
            return new IDataParameter[0]; 
        }

        internal DataTableMapping GetTableMappingBySchemaAction(string sourceTableName, string dataSetTableName, MissingMappingAction mappingAction) {
            return DataTableMappingCollection.GetTableMappingBySchemaAction(_tableMappings, sourceTableName, dataSetTableName, mappingAction); 
        }
 
        internal int IndexOfDataSetTable(string dataSetTable) { 
            if (null != _tableMappings) {
                return TableMappings.IndexOfDataSetTable(dataSetTable); 
            }
            return -1;
        }
 
        virtual protected void OnFillError(FillErrorEventArgs value) { // V1.2.3300, DbDataAdapter V1.0.3300
            FillErrorEventHandler handler = (FillErrorEventHandler) Events[EventFillError]; 
            if (null != handler) { 
                handler(this, value);
            } 
        }

        private void OnFillErrorHandler(Exception e, DataTable dataTable, object[] dataValues) {
            FillErrorEventArgs fillErrorEvent = new FillErrorEventArgs(dataTable, dataValues); 
            fillErrorEvent.Errors = e;
            OnFillError(fillErrorEvent); 
 
            if (!fillErrorEvent.Continue) {
                if (null != fillErrorEvent.Errors) { 
                    throw fillErrorEvent.Errors;
                }
                throw e;
            } 
        }
 
        virtual public int Update(DataSet dataSet) { // V1.0.3300 
            throw ADP.NotSupported();
        } 

        // used by FillSchema which returns an array of datatables added to the dataset
        static private DataTable[] AddDataTableToArray(DataTable[] tables, DataTable newTable) {
            for (int i = 0; i < tables.Length; ++i) { // search for duplicates 
                if (tables[i] ==  newTable) {
                    return tables; // duplicate found 
                } 
            }
            DataTable[] newTables = new DataTable[tables.Length+1]; // add unique data table 
            for (int i = 0; i < tables.Length; ++i) {
                newTables[i] = tables[i];
            }
            newTables[tables.Length] = newTable; 
            return newTables;
        } 
 
       // dynamically generate source table names
        static private string GetSourceTableName(string srcTable, int index) { 
            //if ((null != srcTable) && (0 <= index) && (index < srcTable.Length)) {
            if (0 == index) {
                return srcTable; //[index];
            } 
            return srcTable + index.ToString(System.Globalization.CultureInfo.InvariantCulture);
        } 
    } 

    internal sealed class LoadAdapter : DataAdapter { 
        internal LoadAdapter() {
        }

        internal int FillFromReader(DataTable[] dataTables, IDataReader dataReader, int startRecord, int maxRecords) { 
            return Fill(dataTables, dataReader, startRecord, maxRecords);
        } 
    } 
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
                        

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