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Thankfully, you can easily solve these problems by using a single session that is used for all the high-level functions, and which stays open for the entire request. Rather than make each function in the business layer responsible for session management, you move that responsibility somewhere else. In this section, we ll take the example of an ASP.NET application, where you want to execute a bunch of operations during a single web request. Your applications may do lots of things during a single web request they render web pages, load data in the persistence layer, carry out business functions, and so on. In the approach we ll describe, you can use the same single session throughout the entire request. This session is opened at the start of the request and closed at the end. This approach provides several benefits: any un-initialized associations or collections are successfully initialized when accessed at any point during the request, and a session is always available for saving and loading entities. Furthermore, entities aren t detached during the request as their session is not closed. Despite the benefits of this session-per-request approach, don t be tempted to get lazy and let NHibernate always load data on demand; it may eventually kill your application s

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Topic: zxing · GitHub
C# Updated on Aug 22, 2018 ... Simple barcode scanner on Android using ZXing library. qr-code barcode ... Create a QR Code With a Custom Logo Inside in c#.

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Dec 23, 2017 · QR codes are plastered on advertisements, billboards, business windows ... a smartphone camera — for example, a typical QR code may contain an URL. ... ZXing.Net.Mobile. Go to Solution Explorer and Select Your Solution.

performance. Always eagerly load the data you know you ll need. For more details, read section 7.7.1. A simple way of implementing session-per-request is to open and attach an NHibernate session at the beginning of the web request. ASP.NET lets you implement the IHttpModule interface in order to execute code at the beginning and end of a web request. Listing 10.5 shows how to leverage this feature.

using NHibernate.Context; public class NHibernateCurrentSessionWebModule : IHttpModule { public void Init(HttpApplication context) { context.BeginRequest += new EventHandler(Application_BeginRequest); context.EndRequest += new EventHandler(Application_EndRequest); } public void Dispose() { } private void Application_BeginRequest(object sender, EventArgs e) { ISession session = NHibernateHelper.OpenSession(); session.BeginTransaction(); CurrentSessionContext.Bind(session); } private void Application_EndRequest(object sender, EventArgs e) { ISession session = CurrentSessionContext.Unbind( NHibernateHelper.SessionFactory ); if (session != null) try { session.Transaction.Commit(); } catch(Exception ex) { session.Transaction.Rollback(); Server.Transfer("...", true); } finally { session.Close(); } } }

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How to create a QR Code Reader in C# WPF? - Stack Overflow
Now, your REAL question is "How do I create a QR Code Reader in .NET" - not even C# because the language does not matter if you talk about ...

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Get QR Code Reader - Microsoft Store
Version 1.4 new for WP8: - option to add calendar event to phone calendar - optimized for Nokia Lumia series phones - camera focus problems fixed QR Code ...

Server extensions are used to perform specific functions. Reporting Services uses five different types of server extensions: authentication, data processing, report processing, rendering, and delivery. Over time, you can expect to see more extensions available for Reporting Services, whether developed by Microsoft or by other commercial software developers. Authentication Extensions Authentication extensions are used to define the authorization model used by Reporting Services. Only one authentication extension is supplied, which supports Microsoft Windows and SQL Server security. You can, of course, create your own authentication extension to integrate Reporting Services with another security architecture.

At the beginning of a request B, you open and attach a session. At its end C, you detach and close the session. You also commit the changes that happen thorough the request s lifetime. The following code must be added to the Web.config file:

<configuration> <system.web> <httpModules> <add name="NHibernateCurrentSessionWebModule" type="NHiA.NHibernateCurrentSessionWebModule" /> </httpModules> </system.web> </configuration>

Now, the PlaceBidForItem() method is how you want it to be:

1:

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public void PlaceBidForItem(long itemId, long userId, double bidAmount) { try { ItemDAO itemDAO = daoFactory.GetItemDAO(); Item item = itemDAO.FindByIdAndLock(itemId); double maxBidAmount = itemDAO.GetMaxBid(itemId).Amount; User bidder = daoFactory.GetUserDAO().FindById(userId); item.PlaceBid(bidder, bidAmount, maxBidAmount); } catch (Exception ex) { throw new BusinessException("Placing the bid failed.", ex); } }

If you want to call some other method (such as UpdateItemPopularity()) after this, you can do so using the same session and transaction. You have a session that lives as long as the web request.

In this chapter we explain how you can write your own data access objects, HTTP modules for ASP.NET session management, and various other useful infrastructure-related components. Understanding how to do this is great, but you don t have to write this code yourself. Many people have done this for you already! Existing NHibernate libraries take care of much of the hard work, and include the best practices described here. After reading this section, we encourage you to research some of those libraries, including NHibernate Burrow, Castle ActiveRecord, Rhino Tools, and S#arp Architecture. Even if you decide not to use any of them, you can learn a great deal by browsing the code of these libraries.

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Visual C# ... QrCode; using ZXing.QrCode.Internal; using ZXing.Common; public ActionResult Contact() { ViewBag. ... SaveAs(path); QRCode code = new QRCode(); QRCodeReader reader = new QRCodeReader(); Bitmap ...

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