C# TransactionManager.Commit方法代码示例

 private void Instead01(TransactionManager tm, Customer cus)
 {
     MessageBox.Show("Something...");
     // Begin the transaction after the message box,
     // e.g. if you want to prompt them to do something before saving.
     tm.BeginTransaction();
     DataRepository.CustomerProvider.Insert(tm, cus);
     tm.Commit();
 }

 private void Instead02(TransactionManager tm, Customer cus)
 {
     tm.BeginTransaction();
     DataRepository.CustomerProvider.Insert(tm, cus);
     tm.Commit();
     // Or, show the message box after the transaction completed,
     // e.g. to notify them of an event after saving
     MessageBox.Show("Something...");
 }

      /// <summary>
      /// Apply a record to placeholders
      /// </summary>
		/// <param name="placeHolders">List of placeholder which should be applied</param>
		/// <param name="recordName">Name of record</param>
		/// <returns>Return true if one or more was applied</returns>
      public static void ApplyRecord(IEnumerable<PlaceHolder> placeHolders, string recordName)
      {
         using (Transaction transaction = new TransactionManager().CreateTransaction())
         {
            foreach (PlaceHolder placeHolder in placeHolders)
            {
               placeHolder.ApplyRecord(recordName, true); // apply (with page data)
               transaction.Commit(); // needed if not placed in project
            }
         }
      }

        // SAMPLE 01
        //
        // As mentioned in "C01_TransactionManager," the idea behind transactions
        // is that it should surround a block of code that either saves everything
        // or nothing.
        //
        // Here is the thing to remember: While the transaction is open it will prevent
        // anything from accessing the database tables that you are busy with. This is
        // to prevent "dirty" or incomplete records.
        //
        // The caveat: you want your transaction to execute as fast as possible. Be
        // like a ninja: get in, do your thing, and get out.
        //
        private void BadlyMisplacedCode(TransactionManager tm, Customer cus)
        {
            tm.BeginTransaction();
            DataRepository.CustomerProvider.Insert(tm, cus);
            MessageBox.Show("Something...");
            tm.Commit();

            // Can you see it?
            // This code will block the Customer table on the entire branch until the user
            // clicks "OK" on the message box. The impact of this is enourmous.
        }

      /// <summary>
      /// Create a record to a placeHolder by name and apply a record
      /// </summary>
		/// <param name="placeHolders">List of placeholder which should be applied</param>
		/// <param name="placeHolderName">Name of placeholder</param>
		/// <param name="recordName">Name of record</param>
      /// <param name="variableName">Variable to set</param>
      /// <param name="value">New value of the variable</param>
		/// <returns>Return true if one or more was applied</returns>
      public bool CreateRecordWithValueAndApply(PlaceHolder[] placeHolders, string placeHolderName, string recordName, string variableName, string value)
		{
			List<PlaceHolder> foundPlaceHolder = placeHolders
				.Where(placeHolder => placeHolder.Name.Equals(placeHolderName)) // name
				.ToList();

			foreach (PlaceHolder placeHolder in foundPlaceHolder)
			{
				placeHolder.AddRecord(recordName);
				placeHolder.set_Value(recordName, variableName, value);
				using (Transaction transaction = new TransactionManager().CreateTransaction())
				{
					placeHolder.ApplyRecord(recordName, true); // apply (with page data)
					transaction.Commit(); // needed if not placed in project
				}
			}

			return foundPlaceHolder.Any(); // true == found | false == not found
		}