OleDbDataAdapter.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / Data / System / Data / OleDb / OleDbDataAdapter.cs / 1305376 / OleDbDataAdapter.cs
                        

                        
                            //------------------------------------------------------------------------------ 
// 
//      Copyright (c) Microsoft Corporation.  All rights reserved.
// 
// [....] 
// [....]
//----------------------------------------------------------------------------- 
 
using System;
using System.ComponentModel; 
using System.Data.Common;
using System.Diagnostics;
using System.Reflection;
using System.Runtime.InteropServices; 
using System.Security;
using System.Security.Permissions; 
 
namespace System.Data.OleDb {
 
    [
    DefaultEvent("RowUpdated"),
    ToolboxItem("Microsoft.VSDesigner.Data.VS.OleDbDataAdapterToolboxItem, " + AssemblyRef.MicrosoftVSDesigner),
    Designer("Microsoft.VSDesigner.Data.VS.OleDbDataAdapterDesigner, " + AssemblyRef.MicrosoftVSDesigner), 
    ]
    public sealed class OleDbDataAdapter : DbDataAdapter, IDbDataAdapter, ICloneable { 
 
        static private readonly object EventRowUpdated = new object();
        static private readonly object EventRowUpdating = new object(); 

        private OleDbCommand _deleteCommand, _insertCommand, _selectCommand, _updateCommand;

        public OleDbDataAdapter() : base() { 
            GC.SuppressFinalize(this);
        } 
 
        public OleDbDataAdapter(OleDbCommand selectCommand) : this() {
            SelectCommand = selectCommand; 
        }

        public OleDbDataAdapter(string selectCommandText, string selectConnectionString) : this() {
            OleDbConnection connection = new OleDbConnection(selectConnectionString); 
            SelectCommand = new OleDbCommand(selectCommandText, connection);
        } 
 
        public OleDbDataAdapter(string selectCommandText, OleDbConnection selectConnection) : this() {
            SelectCommand = new OleDbCommand(selectCommandText, selectConnection); 
        }

        private OleDbDataAdapter(OleDbDataAdapter from) : base(from) {
            GC.SuppressFinalize(this); 
        }
 
        [ 
        DefaultValue(null),
        Editor("Microsoft.VSDesigner.Data.Design.DBCommandEditor, " + AssemblyRef.MicrosoftVSDesigner, "System.Drawing.Design.UITypeEditor, " + AssemblyRef.SystemDrawing), 
        ResCategoryAttribute(Res.DataCategory_Update),
        ResDescriptionAttribute(Res.DbDataAdapter_DeleteCommand),
        ]
        new public OleDbCommand DeleteCommand { 
            get { return _deleteCommand; }
            set { _deleteCommand = value; } 
        } 

        IDbCommand IDbDataAdapter.DeleteCommand { 
            get { return _deleteCommand; }
            set { _deleteCommand = (OleDbCommand)value; }
        }
 
        [
        DefaultValue(null), 
        Editor("Microsoft.VSDesigner.Data.Design.DBCommandEditor, " + AssemblyRef.MicrosoftVSDesigner, "System.Drawing.Design.UITypeEditor, " + AssemblyRef.SystemDrawing), 
        ResCategoryAttribute(Res.DataCategory_Update),
        ResDescriptionAttribute(Res.DbDataAdapter_InsertCommand), 
        ]
        new public OleDbCommand InsertCommand {
            get { return _insertCommand; }
            set { _insertCommand = value; } 
        }
 
        IDbCommand IDbDataAdapter.InsertCommand { 
            get { return _insertCommand; }
            set { _insertCommand = (OleDbCommand)value; } 
        }

        [
        DefaultValue(null), 
        Editor("Microsoft.VSDesigner.Data.Design.DBCommandEditor, " + AssemblyRef.MicrosoftVSDesigner, "System.Drawing.Design.UITypeEditor, " + AssemblyRef.SystemDrawing),
        ResCategoryAttribute(Res.DataCategory_Fill), 
        ResDescriptionAttribute(Res.DbDataAdapter_SelectCommand), 
        ]
        new public OleDbCommand SelectCommand { 
            get { return _selectCommand; }
            set { _selectCommand = value; }
        }
 
        IDbCommand IDbDataAdapter.SelectCommand {
            get { return _selectCommand; } 
            set { _selectCommand = (OleDbCommand)value; } 
        }
 
        [
        DefaultValue(null),
        Editor("Microsoft.VSDesigner.Data.Design.DBCommandEditor, " + AssemblyRef.MicrosoftVSDesigner, "System.Drawing.Design.UITypeEditor, " + AssemblyRef.SystemDrawing),
        ResCategoryAttribute(Res.DataCategory_Update), 
        ResDescriptionAttribute(Res.DbDataAdapter_UpdateCommand),
        ] 
        new public OleDbCommand UpdateCommand { 
            get { return _updateCommand; }
            set { _updateCommand = value; } 
        }

        IDbCommand IDbDataAdapter.UpdateCommand {
            get { return _updateCommand; } 
            set { _updateCommand = (OleDbCommand)value; }
        } 
 
        [
        ResCategoryAttribute(Res.DataCategory_Update), 
        ResDescriptionAttribute(Res.DbDataAdapter_RowUpdated),
        ]
        public event OleDbRowUpdatedEventHandler RowUpdated {
            add { Events.AddHandler(EventRowUpdated, value); } 
            remove { Events.RemoveHandler(EventRowUpdated, value); }
        } 
 
        [
        ResCategoryAttribute(Res.DataCategory_Update), 
        ResDescriptionAttribute(Res.DbDataAdapter_RowUpdating),
        ]
        public event OleDbRowUpdatingEventHandler RowUpdating {
            add { 
                OleDbRowUpdatingEventHandler handler = (OleDbRowUpdatingEventHandler) Events[EventRowUpdating];
 
                // MDAC 58177, 64513 
                // prevent someone from registering two different command builders on the adapter by
                // silently removing the old one 
                if ((null != handler) && (value.Target is DbCommandBuilder)) {
                    OleDbRowUpdatingEventHandler d = (OleDbRowUpdatingEventHandler) ADP.FindBuilder(handler);
                    if (null != d) {
                        Events.RemoveHandler(EventRowUpdating, d); 
                    }
                } 
                Events.AddHandler(EventRowUpdating, value); 
            }
            remove { Events.RemoveHandler(EventRowUpdating, value); } 
        }

        object ICloneable.Clone() {
            return new OleDbDataAdapter(this); 
        }
 
        override protected RowUpdatedEventArgs CreateRowUpdatedEvent(DataRow dataRow, IDbCommand command, StatementType statementType, DataTableMapping tableMapping) { 
            return new OleDbRowUpdatedEventArgs(dataRow, command, statementType, tableMapping);
        } 

        override protected RowUpdatingEventArgs CreateRowUpdatingEvent(DataRow dataRow, IDbCommand command, StatementType statementType, DataTableMapping tableMapping) {
            return new OleDbRowUpdatingEventArgs(dataRow, command, statementType, tableMapping);
        } 

        internal static void FillDataTable(OleDbDataReader dataReader, params DataTable[] dataTables) { 
            OleDbDataAdapter adapter = new OleDbDataAdapter(); 
            adapter.Fill(dataTables, dataReader, 0, 0);
        } 

        public int Fill(DataTable dataTable, object ADODBRecordSet) {
            System.Security.PermissionSet permissionSet = new System.Security.PermissionSet(System.Security.Permissions.PermissionState.None);
            permissionSet.AddPermission(OleDbConnection.ExecutePermission); // MDAC 77737 
            permissionSet.AddPermission(new System.Security.Permissions.SecurityPermission(System.Security.Permissions.SecurityPermissionFlag.UnmanagedCode));
            permissionSet.Demand(); 
 
            IntPtr hscp;
            Bid.ScopeEnter(out hscp, " %d#, dataTable, ADODBRecordSet\n", ObjectID); 
            try {
                if (null == dataTable) {
                    throw ADP.ArgumentNull("dataTable");
                } 
                if (null == ADODBRecordSet) {
                    throw ADP.ArgumentNull("adodb"); 
                } 
                // user was required to have UnmanagedCode Permission just to create ADODB
                // (new SecurityPermission(SecurityPermissionFlag.UnmanagedCode)).Demand(); 
                return FillFromADODB((object)dataTable, ADODBRecordSet, null, false); // MDAC 59249
            }
            finally {
                Bid.ScopeLeave(ref hscp); 
            }
        } 
 
        public int Fill(DataSet dataSet, object ADODBRecordSet, string srcTable) {
            System.Security.PermissionSet permissionSet = new System.Security.PermissionSet(System.Security.Permissions.PermissionState.None); 
            permissionSet.AddPermission(OleDbConnection.ExecutePermission); // MDAC 77737
            permissionSet.AddPermission(new System.Security.Permissions.SecurityPermission(System.Security.Permissions.SecurityPermissionFlag.UnmanagedCode));
            permissionSet.Demand();
 
            IntPtr hscp;
            Bid.ScopeEnter(out hscp, " %d#, dataSet, ADODBRecordSet, srcTable='%ls'\n", ObjectID, srcTable); 
            try { 
                if (null == dataSet) {
                    throw ADP.ArgumentNull("dataSet"); 
                }
                if (null == ADODBRecordSet) {
                    throw ADP.ArgumentNull("adodb");
                } 
                if (ADP.IsEmpty(srcTable)) {
                    throw ADP.FillRequiresSourceTableName("srcTable"); 
                } 
                // user was required to have UnmanagedCode Permission just to create ADODB
                // (new SecurityPermission(SecurityPermissionFlag.UnmanagedCode)).Demand(); 
                return FillFromADODB((object)dataSet, ADODBRecordSet, srcTable, true);
            }
            finally {
                Bid.ScopeLeave(ref hscp); 
            }
        } 
 
        private int FillFromADODB(Object data, object adodb, string srcTable, bool multipleResults) {
            Debug.Assert(null != data, "FillFromADODB: null data object"); 
            Debug.Assert(null != adodb, "FillFromADODB: null ADODB");
            Debug.Assert(!(adodb is DataTable), "call Fill( (DataTable) value)");
            Debug.Assert(!(adodb is DataSet), "call Fill( (DataSet) value)");
 
            /*
            IntPtr adodbptr = ADP.PtrZero; 
            try { // generate a new COM Callable Wrapper around the user object so they can't ReleaseComObject on us. 
                adodbptr = Marshal.GetIUnknownForObject(adodb);
                adodb = System.Runtime.Remoting.Services.EnterpriseServicesHelper.WrapIUnknownWithComObject(adodbptr); 
            }
            finally {
                if (ADP.PtrZero != adodbptr) {
                    Marshal.Release(adodbptr); 
                }
            } 
            */ 

            bool closeRecordset = multipleResults; // MDAC 60332, 66668 
            Bid.Trace(" ADORecordsetConstruction\n");
            UnsafeNativeMethods.ADORecordsetConstruction recordset = (adodb as UnsafeNativeMethods.ADORecordsetConstruction);
            UnsafeNativeMethods.ADORecordConstruction record = null;
 
            if (null != recordset) { // MDAC 78415
                if (multipleResults) { 
                    // The NextRecordset method is not available on a disconnected Recordset object, where ActiveConnection has been set to NULL 
                    object activeConnection;
 
                    Bid.Trace("\n");
                    activeConnection = ((UnsafeNativeMethods.Recordset15)adodb).get_ActiveConnection();

                    if (null == activeConnection) { 
                        multipleResults = false;
                    } 
                } 
            }
            else { 
                Bid.Trace(" ADORecordConstruction\n");
                record = (adodb as UnsafeNativeMethods.ADORecordConstruction);

                if (null != record) { // MDAC 78415 
                    multipleResults = false; // IRow implies CommandBehavior.SingleRow which implies CommandBehavior.SingleResult
                } 
            } 
            // else throw ODB.Fill_NotADODB("adodb"); /* throw later, less code here*/
 
            int results = 0;
            if (null != recordset) {
                int resultCount = 0;
                bool incrementResultCount; // MDAC 59632 
                object[] value = new object[1];
 
                do { 
                    string tmp = null;
                    if (data is DataSet) { 
                        tmp = GetSourceTableName(srcTable, resultCount);
                    }
                    results += FillFromRecordset(data, recordset, tmp, out incrementResultCount);
 
                    if (multipleResults) {
                        value[0] = DBNull.Value; 
 
                        object recordsAffected;
                        object nextresult; 

                        Bid.Trace("\n");
                        OleDbHResult hr = ((UnsafeNativeMethods.Recordset15)adodb).NextRecordset(out recordsAffected, out nextresult); // MDAC 78415
                        Bid.Trace(" %08X{HRESULT}\n", hr); 

                        if (0 > hr) { 
                            // Current provider does not support returning multiple recordsets from a single execution. 
                            if (ODB.ADODB_NextResultError != (int)hr) {
                                UnsafeNativeMethods.IErrorInfo errorInfo = null; 
                                UnsafeNativeMethods.GetErrorInfo(0, out errorInfo);

                                string message = String.Empty;
                                if (null != errorInfo) { 
                                    OleDbHResult hresult = ODB.GetErrorDescription(errorInfo, hr, out message);
                                } 
                                throw new COMException(message, (int)hr); 
                            }
                            break; 
                        }
                        adodb = nextresult;
                        if (null != adodb) {
                            Bid.Trace(" ADORecordsetConstruction\n"); 
                            recordset = (UnsafeNativeMethods.ADORecordsetConstruction) adodb;
 
                            if (incrementResultCount) { 
                                resultCount++;
                            } 
                            continue;
                        }
                    }
                    break; 
                } while(null != recordset);
 
                if ((null != recordset) && (closeRecordset || (null == adodb))) { // MDAC 59746, 60902 
                    FillClose(true, recordset);
                } 
            }
            else if (null != record) {
                results = FillFromRecord(data, record, srcTable);
                if (closeRecordset) { // MDAC 66668 
                    FillClose(false, record); // MDAC 60848
                } 
            } 
            else {
                throw ODB.Fill_NotADODB("adodb"); 
            }
            return results;
        }
 
        //override protected int Fill(DataTable dataTable, IDataReader dataReader) { // MDAC 65506
        //    return base.Fill(dataTable, dataReader); 
        //} 

        private int FillFromRecordset(Object data, UnsafeNativeMethods.ADORecordsetConstruction recordset, string srcTable, out bool incrementResultCount) { 
            incrementResultCount = false;

            IntPtr chapter; /*ODB.DB_NULL_HCHAPTER*/
            object result = null; 
            try {
                Bid.Trace("\n"); 
                result = recordset.get_Rowset(); // MDAC 83342 
                Bid.Trace(" %08X{HRESULT}\n", 0);
 
                Bid.Trace("\n");
                chapter = recordset.get_Chapter(); // MDAC 83342
                Bid.Trace(" %08X{HRESULT}\n", 0);
            } 
            catch (Exception e) {
                // 
                if (!ADP.IsCatchableExceptionType(e)) { 
                    throw;
                } 

                throw ODB.Fill_EmptyRecordSet("ADODBRecordSet", e);
            }
 
            if (null != result) {
                CommandBehavior behavior = (MissingSchemaAction.AddWithKey != MissingSchemaAction) ? 0 : CommandBehavior.KeyInfo; 
                behavior |= CommandBehavior.SequentialAccess; 

                OleDbDataReader dataReader = null; 
                try {
                     // intialized with chapter only since we don't want ReleaseChapter called for this chapter handle
                    ChapterHandle chapterHandle = ChapterHandle.CreateChapterHandle(chapter);
 
                    dataReader = new OleDbDataReader(null, null, 0, behavior);
                    dataReader.InitializeIRowset(result, chapterHandle, ADP.RecordsUnaffected); 
                    dataReader.BuildMetaInfo(); 

                    incrementResultCount = (0 < dataReader.FieldCount); // MDAC 59632 
                    if (incrementResultCount) {
                        if (data is DataTable) {
                            return base.Fill((DataTable) data, dataReader); // MDAC 65506
                        } 
                        else {
                            return base.Fill((DataSet) data, srcTable, dataReader, 0, 0); 
                        } 
                    }
                } 
                finally {
                    if (null != dataReader) {
                        dataReader.Close();
                    } 
                }
            } 
            return 0; 
        }
 
        private int FillFromRecord(Object data, UnsafeNativeMethods.ADORecordConstruction record, string srcTable) {
            object result = null;
            try {
                Bid.Trace("\n"); 
                result = record.get_Row(); // MDAC 83342
                Bid.Trace(" %08X{HRESULT}\n", 0); 
            } 
            catch(Exception e) {
                // 
                if (!ADP.IsCatchableExceptionType(e)) {
                    throw;
                }
 
                throw ODB.Fill_EmptyRecord("adodb", e);
            } 
 
            if (null != result) {
                CommandBehavior behavior = (MissingSchemaAction.AddWithKey != MissingSchemaAction) ? 0 : CommandBehavior.KeyInfo; 
                behavior |= CommandBehavior.SequentialAccess | CommandBehavior.SingleRow;

                OleDbDataReader dataReader = null;
                try { 
                    dataReader = new OleDbDataReader(null, null, 0, behavior);
                    dataReader.InitializeIRow(result, ADP.RecordsUnaffected); 
                    dataReader.BuildMetaInfo(); 

                    if (data is DataTable) { 
                        return base.Fill((DataTable) data, dataReader); // MDAC 65506
                    }
                    else {
                        return base.Fill((DataSet) data, srcTable, dataReader, 0, 0); 
                    }
                } 
                finally { 
                    if (null != dataReader) {
                        dataReader.Close(); 
                    }
                }
            }
            return 0; 
        }
 
        private void FillClose(bool isrecordset, object value) { 
            OleDbHResult hr;
            if (isrecordset) { 
                Bid.Trace("\n");
                hr = ((UnsafeNativeMethods.Recordset15)value).Close(); // MDAC 78415
                Bid.Trace(" %08X{HRESULT}\n", hr);
            } 
            else {
                Bid.Trace("\n"); 
                hr = ((UnsafeNativeMethods._ADORecord)value).Close(); // MDAC 78415 
                Bid.Trace(" %08X{HRESULT}\n", hr);
            } 
            if ((0 < (int)hr) && (ODB.ADODB_AlreadyClosedError != (int)hr)) {
                UnsafeNativeMethods.IErrorInfo errorInfo = null;
                UnsafeNativeMethods.GetErrorInfo(0, out errorInfo);
                string message = String.Empty; 
                if (null != errorInfo) {
                    OleDbHResult hresult = ODB.GetErrorDescription(errorInfo, hr, out message); 
                } 
                throw new COMException(message, (int)hr);
            } 
        }

        override protected void OnRowUpdated(RowUpdatedEventArgs value) {
            OleDbRowUpdatedEventHandler handler = (OleDbRowUpdatedEventHandler) Events[EventRowUpdated]; 
            if ((null != handler) && (value is OleDbRowUpdatedEventArgs)) {
                handler(this, (OleDbRowUpdatedEventArgs) value); 
            } 
            base.OnRowUpdated(value);
        } 

        override protected void OnRowUpdating(RowUpdatingEventArgs value) {
            OleDbRowUpdatingEventHandler handler = (OleDbRowUpdatingEventHandler) Events[EventRowUpdating];
            if ((null != handler) && (value is OleDbRowUpdatingEventArgs)) { 
                handler(this, (OleDbRowUpdatingEventArgs) value);
            } 
            base.OnRowUpdating(value); 
        }
 
        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); 
        } 
    }
} 

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

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