birt ean 128

birt ean 128

birt barcode plugin, birt gs1 128, birt data matrix, birt pdf 417, birt qr code, birt code 39, birt code 128, birt gs1 128, birt code 128, birt ean 13, birt qr code download, birt data matrix, birt ean 13, free birt barcode plugin, birt upc-a

windows xp error code 39 network adapter, asp.net ean 13, winforms data matrix, .net pdf to image, asp.net display pdf, rdlc upc-a, winforms ean 13, vb.net word to pdf, asp.net multipage tiff viewer with thumbnails, c# ean 13 reader

However, there s no way for the collection object to stop client code from interacting with the child objects themselves. Typically, the items in the collection expose only read-only properties and methods. If read-write objects are put into the collection, the client code will be able to alter their data. A read-only collection only guarantees that objects can t be added or removed from the collection. The child objects may be derived from ReadOnlyBase, but they could just as easily be simple objects that don t inherit from any CSLA .NET base class. The only requirements for these child objects are that they are implemented with read-only properties and that they are marked as Serializable. The code for a typical read-only collection object looks like this:

The hardest part of implementing n-level undo functionality is that not only can child objects be added or deleted, but they can also be undeleted or unadded in the case of an undo operation.

Just replace the <query> in the URI with the filter that you want to run server-side. Again, you can modify the console application in listing 12.4 to use this URI. When the query is executed, all entities that match the query will be returned in Atom XML format, as in listing 12.5.

java barcode scanner library, java data matrix barcode generator, java data matrix reader, java ean 128, pdf image text editor online free, word data matrix code

[Serializable] public class ReadOnlyList : ReadOnlyListBase<ReadOnlyList, ReadOnlyChild> { #region Authorization Rules private static void AddObjectAuthorizationRules() { // TODO: add authorization rules //AuthorizationRules.AllowGet(typeof(ReadOnlyList), "Role"); } #endregion #region Factory Methods public static ReadOnlyList GetReadOnlyList(string filter) { return DataPortal.Fetch<ReadOnlyList>( new SingleCriteria<ReadOnlyList, string>(filter)); } private ReadOnlyList() { /* require use of factory methods */ } #endregion #region Data Access private void DataPortal_Fetch( SingleCriteria<ReadOnlyList, string> criteria) { RaiseListChangedEvents = false; IsReadOnly = false; // TODO: load values object objectData = null; foreach (var child in (List<object>)objectData) Add(ReadOnlyChild.GetReadOnlyChild(child)); IsReadOnly = true; RaiseListChangedEvents = true; } #endregion } The Authorization Rules region contains only the AddObjectAuthorizationRules() method, which only needs to define the roles allowed to get the object. The Factory Methods region has a factory method to return a collection loaded with data. It calls DataPortal.Fetch() and often passes in some criteria or filter value to restrict the results of the list. Finally, the DataPortal_Fetch() method loads the object with data from the database. To do this, the IsReadOnly flag is set to false, the data is loaded from the database, and then IsReadOnly is set to true. When IsReadOnly is set to true, any attempt to add or remove items from the collection results in an exception being thrown. Temporarily setting it to false allows the code to insert all the appropriate child objects into the collection.

Csla.Core.BusinessBase and UndoableBase use the concept of an edit level. The edit level allows the object to keep track of how many BeginEdit() calls have been made to take a snapshot of its state without corresponding CancelEdit() or ApplyEdit() calls. More specifically, it tells the object how many states have been stacked up for undo operations. BusinessListBase needs the same edit level tracking as in BusinessBase. However, a collection won t actually stack its states. Rather, it cascades the call to each of its child objects so that they can stack their own states. Because of this, the edit level can be tracked using a simple numeric counter. It merely counts how many unpaired BeginEdit() calls have been made: // keep track of how many edit levels we have int _editLevel; The implementations of CopyState(), UndoChanges(), and AcceptChanges() will alter this value accordingly.

Let s take a quick look at the syntax of the query expression applied in the REST API. (We ll look at using these queries in the more familiar LINQ syntax in the next section.) As of the PDC 2009 release, the Table service only supports the query expressions listed in table 12.2.

java pdf editor open source, jspdf jpg to pdf, convert pdf to jpg using java, convert base64 pdf to image javascript