c# create barcode Glossary in .NET

Printing QR in .NET Glossary

only secret used is the one that is stored on the authentication server. If an attacker gets hold of the authentication server s password database, or the shared secret some other way, he has everything he needs to authenticate. The only thing he needs to do now is insert himself at the appropriate step in the authentication process so that he can send the shared secret instead of the password it is derived from. Currently several tools are freely available on the Internet that do this with Windows authentication across the network. The fact that passwords are plaintext-equivalent, in and of itself, is not a security problem. It only becomes a problem when an attacker obtains a password hash. However, as you should realize by now, those are fairly well protected in Windows. If an attacker manages to obtain a password hash, he has already compromised the computer as much or more than he would be able to with that password hash! In other words, that password hash gives him no additional privileges on an already compromised computer. If passwords are valid on other computers, however, it is possible that an attacker can further a compromise using the password hashes. Furthermore, because password hashes are cached in memory, an attacker may be able to obtain domain administrative credentials from a member computer if a domain administrator is logged on. This, however, is largely an operational problem related to how you run your network. If you follow the advice in 11, you will adequately protect yourself against that vector.

Rank and dense rank are calculations similar to row number. But unlike row number, which has a large variety of practical applications, rank and dense rank are typically used for ranking and scoring applications.

See if you can identify a relationship between the way the seqval values increment and the way row numbers do. Because both sequences keep incrementing by the same interval within an island, their difference remains constant within an island. As soon as you get to a new island, the difference between them increases because seqval increments by more than 1, while the row number increments by 1. Run the following query to produce this difference:

internal struct Point { public Int32 m_x, m_y; public Point(Int32 x, Int32 y) { m_x = x; m_y = y; } } internal sealed class Rectangle { public Point m_topLeft, m_bottomRight; public Rectangle() { // In C#, new on a value type calls the constructor to // initialize the value type's fields. m_topLeft = new Point(1, 2); m_bottomRight = new Point(100, 200); } }

Extending with Macros Before I discuss the CommenTater macro, I want to spend a little bit of time discussing a few key things about macros and some of the issues you'll encounter. The biggest point I want to make is that even if you think you have the coolest add-in idea in the world and can't wait to get started, you need to spend a lot of time writing macros before you jump into building add-ins. Since macros access all the same objects and properties as add-ins, they provide the best opportunity to learn about the ins and outs of the Visual Studio .NET object model. As you'll see later in the chapter, the object model has lots of quirks, and getting add-ins working is sometimes problematic. Macros are much easier to write and debug, so you'll want to use them first to prototype. Before finding the Macro option on the Tools menu, you should spend some time reading the documentation about macros and the object model. Macros themselves are discussed in the Visual Studio .NET documentation under Visual Studio .NET\Developing With Visual Studio .NET\Manipulating The Development Environment\Automating Repetitive Actions By Using Macros. The all-important object model is discussed in Visual Studio .NET\Developing With Visual Studio .NET\Reference\Automation And Extensibility Reference. After perusing the documentation for a while to see what the various objects are, start recording macros so that you can see some of the objects in action. Keep in mind that recording works primarily on the code editors (including the Find/Replace dialog boxes), Solution Explorer, and window activation. You won't be able to record things like building up a Web form or Windows form with controls. Also make sure to take a look at the macro samples provided by Microsoft, which are automatically loaded into the Macro Explorer as part of the Samples macro project. The Macro Explorer is shown in Figure 9-1. The macro samples are good examples of how to use the object model to solve problems. The MakeAddinFromMacroProj macro (in the MakeAddin macro project) is my personal favorite because it takes a macro and converts it to an add-in. It shows the power we now have at our fingertips with Visual Studio .NET.

C ha P ter 13 W eB a PP LI C a t I O N F r a M e W O r K S : r a I LS , S I N a t r a , a N D r a M a Z e

As you can see from the previous examples, ASP .NET clears the cache on several occasions, as follows:

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the case of Figure 3-1, I just passed "Debug.Assert assertion" as the second parameter to Debug.Assert.

Repeat the previous step as required to add items to the agenda, as shown in Figure 22-19.

1. Add the highlighted piece of code to presentation/templates/admin_orders.tpl: <form action="{"admin.php"|prepare_link:"https"}" method="get"> <input name="Page" type="hidden" value="Orders" /> <span class="admin_page_text">Show orders by customer</span> <select name="customer_id"> {section name=cCustomers loop=$admin_orders->mCustomers} <option value="{$admin_orders->mCustomers[cCustomers].customer_id}" {if $admin_orders->mCustomers[cCustomers].customer_id == $admin_orders->mCustomerId}selected="selected"{/if}> {$admin_orders->mCustomers[cCustomers].name} </option> {/section} </select>