barcode visual basic Inside Microsoft SQL Server 2008: T-SQL Programming in .NET

Generate qrcode in .NET Inside Microsoft SQL Server 2008: T-SQL Programming

Here you can see that the style called ImageButton is created, and it contains a setter for the Template property. The Template contains a ControlTemplate that defines a Button that contains a StackPanel with an Image and a TextBlock in it. Note that this TextBlock can contain a style reference too because the TextBlock control in the template has its style set to the TextBlockStyle that you created earlier.

BlueCloth isn t part of the Ruby standard library, but it is available as a RubyGem. To install it, use the typical gem installation process (as covered in 7), like so: gem install BlueCloth or sudo gem install BlueCloth

Figure 2-24. On the Main Configuration screen, you can enter a site name, an admin e-mail, and data loading information.

Outbound Filters:

validates the cookie data but doesn t encrypt it. Encryption encrypts the cookie data but doesn t validate it. None does neither. All (the default) both encrypts the cookie data and validates it, detecting any alteration in transit. For all but the least important data, the default is a reasonable choice, at the cost of some performance. Note Why validate the cookie Because the cookie can be used to tie into information that shouldn t be shared, validating the cookie data and rejecting it if it has been tampered with can ensure that no one can, say, hijack another shopper s shopping cart. A simple example of forms-based authentication is shown in Listings 4-6, 4-7, and 4-8. This simple-minded example uses a hard-coded user name and password within Login.aspx, as shown in Listing 4-6. These listings also introduce a new class of user interface objects. In Listing 4-6, the button used on the screen isn t a standard HTML submit button or even a standard HTML button but rather an asp:button. We ll examine these objects in much greater detail in 5. For now, just assume that they behave as you might expect. And just take it on faith that the OnClick event causes the code in Login_Click at the top of the page to be fired. Some of the details within Login_Click in Listing 4-6 aren t important, but the call to FormsAuthentication.RedirectFromLoginPage is. The first parameter passed to this method is the name of the user, obtained from UserEmail.Value, using magic not yet described (See 5 for more information on getting values from server controls.) The second parameter, hard-coded to false here, indicates that a persistent cookie shouldn t be used. Listing 4-6 A login page for authentication sample (Login.aspx)

The Logging application block allows you to decouple your logging functionality from your application code. The block can route log entries to a Windows Event Log, a database, or a text (or XML) file. It can also generate an e-mail message containing the logging information, a message you can route through Windows Message Queuing (using a distributor service provided with the block), or a Windows Management Instrumentation (WMI) event. And, if none of these built-in capabilities meets your requirements, you can create a provider that sends the log entry to any other custom location or executes some other action. In your application, you simply generate a log entry using a suitable logging object, such as the LogWriter class, and then call a method to write the information it contains to the logging system. The Logging block routes the log message through any filters you define in your configuration, and on to the listeners that you configure. Each listener defines the target of the log entry, such as Windows Event Log or an e-mail message, and uses a formatter to generate suitably formatted content for that logging target. You can see from this that there are many objects involved in this multi-step process, and it is important to understand how they interact and how the log message flows through the pipeline of processes. Figure 1 shows the overall process in more detail, and provides an explanation of each stage.

FOR i IN array_lower(inWords, 1)..array_upper(inWords, 1) LOOP IF i = array_upper(inWords, 1) THEN query := query||inWords[i]; ELSE query := query||inWords[i]||search_operator; END IF; END LOOP; query_string := to_tsquery(query); -- Return the search results FOR outProductListRow IN SELECT product_id, name, description, price, discounted_price, thumbnail FROM product WHERE search_vector @@ query_string ORDER BY rank(search_vector, query_string) DESC LIMIT inProductsPerPage OFFSET inStartPage LOOP IF char_length(outProductListRow.description) > inShortProductDescriptionLength THEN outProductListRow.description := substring(outProductListRow.description, 1, inShortProductDescriptionLength) || '...'; END IF; RETURN NEXT outProductListRow; END LOOP; END; $$;

This generates the following output, shown here in two parts because of page-width restrictions:

The first string identifies an assembly file called MyTypes .exe or MyTypes .dll (you can t actually determine the file extension from an assembly identity string) . The company producing the assembly is creating version 1 .0 .8123 .0 of this assembly, and nothing in the assembly is sensitive to any one culture because Culture is set to neutral . Of course, any company could produce a MyTypes .dll (or MyTypes .exe) assembly file that is marked with a version number of 1 .0 .8123 .0 and a neutral culture . There must be a way to distinguish this company s assembly from another company s assembly that happens to have the same attributes . For several reasons, Microsoft chose to use standard public/private key cryptographic technologies instead of any other unique identification technique such as GUIDs, URLs, or URNs . Specifically, cryptographic techniques provide a way to check the integrity of the assembly s bits as they are installed on a machine, and they also allow permissions to be granted on a per-publisher basis . I ll discuss these techniques later in this chapter . So a company that wants to uniquely mark its assemblies must create a public/private key pair . Then the public key can be associated with the assembly . No two companies should have the same public/private key pair, and this distinction is what allows two companies to create assemblies that have the same name, version, and culture without causing any conflict . Note The System.Reflection.AssemblyName class is a helper class that makes it easy for

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Actions actions = Actions.Read | Actions.Delete; // 0x0005 Console.WriteLine(actions.ToString()); // "Read, Delete"

This generates the following output: