EntityTransaction.cs source code in C# .NET

                        Code:
                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / DataEntity / System / Data / EntityClient / EntityTransaction.cs / 1305376 / EntityTransaction.cs
                        
                        
                            //---------------------------------------------------------------------- 
// 
//      Copyright (c) Microsoft Corporation.  All rights reserved.
// 
// 
// @owner  [....]
// @backupOwner [....] 
//--------------------------------------------------------------------- 
using System.Collections.Generic;
using System.Text; 
using System.Data;
using System.Data.Common;
using System.Diagnostics;
 
namespace System.Data.EntityClient
{ 
    using Metadata.Edm; 

    ///  
    /// Class representing a transaction for the conceptual layer
    /// 
    public sealed class EntityTransaction : DbTransaction
    { 
        private EntityConnection _connection;
        private DbTransaction _storeTransaction; 
 
        /// 
        /// Constructs the EntityTransaction object with an associated connection and the underlying store transaction 
        /// 
        /// The EntityConnetion object owning this transaction
        /// The underlying transaction object
        internal EntityTransaction(EntityConnection connection, DbTransaction storeTransaction) 
            : base()
        { 
            Debug.Assert(connection != null && storeTransaction != null); 

            this._connection = connection; 
            this._storeTransaction = storeTransaction;
        }

        ///  
        /// The connection object owning this transaction object
        ///  
        public new EntityConnection Connection 
        {
            get 
            {   // follow the store transaction behavior
                return ((null != _storeTransaction.Connection) ? _connection : null);
            }
        } 

        ///  
        /// The connection object owning this transaction object 
        /// 
        protected override DbConnection DbConnection 
        {
            get
            {   // follow the store transaction behavior
                return ((null != _storeTransaction.Connection) ? _connection : null); 
            }
        } 
 
        /// 
        /// The isolation level of this transaction 
        /// 
        public override IsolationLevel IsolationLevel
        {
            get 
            {
                return this._storeTransaction.IsolationLevel; 
            } 
        }
 
        /// 
        /// Gets the DbTransaction for the underlying provider transaction
        /// 
        internal DbTransaction StoreTransaction 
        {
            get 
            { 
                return this._storeTransaction;
            } 
        }

        /// 
        /// Commits the transaction 
        /// 
        public override void Commit() 
        { 
            try
            { 
                this._storeTransaction.Commit();
            }
            catch (Exception e)
            { 
                if (EntityUtil.IsCatchableExceptionType(e))
                { 
                    throw EntityUtil.Provider(@"Commit", e); 
                }
                throw; 
            }

            this.ClearCurrentTransaction();
        } 

        ///  
        /// Rolls back the transaction 
        /// 
        public override void Rollback() 
        {
            try
            {
                this._storeTransaction.Rollback(); 
            }
            catch (Exception e) 
            { 
                if (EntityUtil.IsCatchableExceptionType(e))
                { 
                    throw EntityUtil.Provider(@"Rollback", e);
                }
                throw;
            } 

            this.ClearCurrentTransaction(); 
        } 

        ///  
        /// Cleans up this transaction object
        /// 
        /// true to release both managed and unmanaged resources; false to release only unmanaged resources
        protected override void Dispose(bool disposing) 
        {
            if (disposing) 
            { 
                this.ClearCurrentTransaction();
                this._storeTransaction.Dispose(); 
            }
            base.Dispose(disposing);
        }
 
        /// 
        /// Helper method to wrap EntityConnection.ClearCurrentTransaction() 
        ///  
        private void ClearCurrentTransaction()
        { 
            if (_connection.CurrentTransaction == this)
            {
                _connection.ClearCurrentTransaction();
            } 
        }
    } 
} 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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EntityTransaction.cs source code in C# .NET

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