SqlDataAdapter.cs source code in C# .NET

                        Code:
                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / Data / System / Data / SqlClient / SqlDataAdapter.cs / 1305376 / SqlDataAdapter.cs
                        
                        
                            //------------------------------------------------------------------------------ 
// 
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// 
// [....] 
// [....]
//----------------------------------------------------------------------------- 
 
namespace System.Data.SqlClient {
 
    using System;
    using System.Collections;
    using System.ComponentModel;
    using System.Data.Common; 
    using System.Diagnostics;
 
    [ 
    DefaultEvent("RowUpdated"),
    ToolboxItem("Microsoft.VSDesigner.Data.VS.SqlDataAdapterToolboxItem, " + AssemblyRef.MicrosoftVSDesigner), 
    Designer("Microsoft.VSDesigner.Data.VS.SqlDataAdapterDesigner, " + AssemblyRef.MicrosoftVSDesigner)
    ]
    public sealed class SqlDataAdapter : DbDataAdapter, IDbDataAdapter, ICloneable {
 
        static private readonly object EventRowUpdated = new object();
        static private readonly object EventRowUpdating = new object(); 
 
        private SqlCommand _deleteCommand, _insertCommand, _selectCommand, _updateCommand;
 
        private SqlCommandSet       _commandSet;
        private int                 _updateBatchSize = 1;

        public SqlDataAdapter() : base() { 
            GC.SuppressFinalize(this);
        } 
 
        public SqlDataAdapter(SqlCommand selectCommand) : this() {
            SelectCommand = selectCommand; 
        }

        public SqlDataAdapter(string selectCommandText, string selectConnectionString) : this() {
            SqlConnection connection = new SqlConnection(selectConnectionString); 
            SelectCommand = new SqlCommand(selectCommandText, connection);
        } 
 
        public SqlDataAdapter(string selectCommandText, SqlConnection selectConnection) : this() {
            SelectCommand = new SqlCommand(selectCommandText, selectConnection); 
        }

        private SqlDataAdapter(SqlDataAdapter from) : base(from) { // Clone
            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 SqlCommand DeleteCommand { 
            get { return _deleteCommand; }
            set { _deleteCommand = value; } 
        } 

        IDbCommand IDbDataAdapter.DeleteCommand { 
            get { return _deleteCommand; }
            set { _deleteCommand = (SqlCommand)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 SqlCommand InsertCommand {
            get { return _insertCommand; }
            set { _insertCommand = value; } 
        }
 
        IDbCommand IDbDataAdapter.InsertCommand { 
            get { return _insertCommand; }
            set { _insertCommand = (SqlCommand)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 SqlCommand SelectCommand { 
            get { return _selectCommand; }
            set { _selectCommand = value; }
        }
 
        IDbCommand IDbDataAdapter.SelectCommand {
            get { return _selectCommand; } 
            set { _selectCommand = (SqlCommand)value; } 
        }
 

        override public int UpdateBatchSize {
            get {
                return _updateBatchSize; 
            }
            set { 
                if (0 > value) { // WebData 98157 
                    throw ADP.ArgumentOutOfRange("UpdateBatchSize");
                } 
                _updateBatchSize = value;
                Bid.Trace(" %d#, %d\n", ObjectID, 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 SqlCommand UpdateCommand {
            get { return _updateCommand; } 
            set { _updateCommand = value; }
        } 
 
        IDbCommand IDbDataAdapter.UpdateCommand {
            get { return _updateCommand; } 
            set { _updateCommand = (SqlCommand)value; }
        }

        [ 
        ResCategoryAttribute(Res.DataCategory_Update),
        ResDescriptionAttribute(Res.DbDataAdapter_RowUpdated), 
        ] 
        public event SqlRowUpdatedEventHandler RowUpdated {
            add { 
                Events.AddHandler(EventRowUpdated, value);
            }
            remove {
                Events.RemoveHandler(EventRowUpdated, value); 
            }
        } 
 
        [
        ResCategoryAttribute(Res.DataCategory_Update), 
        ResDescriptionAttribute(Res.DbDataAdapter_RowUpdating),
        ]
        public event SqlRowUpdatingEventHandler RowUpdating {
            add { 
                SqlRowUpdatingEventHandler handler = (SqlRowUpdatingEventHandler) 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)) {
                    SqlRowUpdatingEventHandler d = (SqlRowUpdatingEventHandler) ADP.FindBuilder(handler);
                    if (null != d) {
                        Events.RemoveHandler(EventRowUpdating, d); 
                    }
                } 
                Events.AddHandler(EventRowUpdating, value); 
            }
            remove { 
                Events.RemoveHandler(EventRowUpdating, value);
            }
        }
 
        override protected int AddToBatch(IDbCommand command) {
            int commandIdentifier = _commandSet.CommandCount; 
            _commandSet.Append((SqlCommand)command); 
            return commandIdentifier;
        } 

        override protected void ClearBatch() {
            _commandSet.Clear();
        } 

        object ICloneable.Clone() { 
            return new SqlDataAdapter(this); 
        }
 
        override protected RowUpdatedEventArgs CreateRowUpdatedEvent(DataRow dataRow, IDbCommand command, StatementType statementType, DataTableMapping tableMapping) {
            return new SqlRowUpdatedEventArgs(dataRow, command, statementType, tableMapping);
        }
 
        override protected RowUpdatingEventArgs CreateRowUpdatingEvent(DataRow dataRow, IDbCommand command, StatementType statementType, DataTableMapping tableMapping) {
            return new SqlRowUpdatingEventArgs(dataRow, command, statementType, tableMapping); 
        } 

        override protected int ExecuteBatch() { 
            Debug.Assert(null != _commandSet && (0 < _commandSet.CommandCount), "no commands");
            return _commandSet.ExecuteNonQuery();
        }
 
        override protected IDataParameter GetBatchedParameter(int commandIdentifier, int parameterIndex) {
            Debug.Assert(commandIdentifier < _commandSet.CommandCount, "commandIdentifier out of range"); 
            Debug.Assert(parameterIndex < _commandSet.GetParameterCount(commandIdentifier), "parameter out of range"); 
            IDataParameter parameter = _commandSet.GetParameter(commandIdentifier, parameterIndex);
            return parameter; 
        }

        override protected bool GetBatchedRecordsAffected(int commandIdentifier, out int recordsAffected, out Exception error) {
            Debug.Assert(commandIdentifier < _commandSet.CommandCount, "commandIdentifier out of range"); 
            return _commandSet.GetBatchedAffected(commandIdentifier, out recordsAffected, out error);
        } 
 
        override protected void InitializeBatching() {
            Bid.Trace(" %d#\n", ObjectID); 
            _commandSet = new SqlCommandSet();
            SqlCommand command = SelectCommand;
            if (null == command) {
                command = InsertCommand; 
                if (null == command) {
                    command = UpdateCommand; 
                    if (null == command) { 
                        command = DeleteCommand;
                    } 
                }
            }
            if (null != command) {
                _commandSet.Connection = command.Connection; 
                _commandSet.Transaction = command.Transaction;
                _commandSet.CommandTimeout = command.CommandTimeout; 
            } 
        }
 
        override protected void OnRowUpdated(RowUpdatedEventArgs value) {
            SqlRowUpdatedEventHandler handler = (SqlRowUpdatedEventHandler) Events[EventRowUpdated];
            if ((null != handler) && (value is SqlRowUpdatedEventArgs)) {
                handler(this, (SqlRowUpdatedEventArgs) value); 
            }
            base.OnRowUpdated(value); 
        } 

        override protected void OnRowUpdating(RowUpdatingEventArgs value) { 
            SqlRowUpdatingEventHandler handler = (SqlRowUpdatingEventHandler) Events[EventRowUpdating];
            if ((null != handler) && (value is SqlRowUpdatingEventArgs)) {
                handler(this, (SqlRowUpdatingEventArgs) value);
            } 
            base.OnRowUpdating(value);
        } 
 
        override protected void TerminateBatching() {
            if (null != _commandSet) { 
                _commandSet.Dispose();
                _commandSet = null;
            }
        } 
    }
} 

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