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642 Creating Command Objects Once you have the connection object, you can move on to creating a command object As you an see from the code, there is very little difference between the SqlCommand class and the SqlCeCommand class Nor is there much difference between the two data reader classes The only change we had to make in the program is caused by the absence of the Seek method in the SqlDataReader class Although there is very little difference between the two command classes, there can be a great difference in how you use them This is because SQL Server has stored procedures and SQL Server CE does not, and access to the stored procedures is provided only through the SqlCommand class 643 Using SQL Server Stored Procedures A stored procedure is a procedure that is written in SQL, stored in a SQL Server database, and executable by a client program It can have input and output parameters and returns an integer value A stored procedure can be as simple as a single SELECT statement or as complex as a multitable update with parameter checking and error handling Stored procedures encapsulate functionality on the server side One benefit of stored procedures is that they execute much more quickly than the same logic would in a submitted batch of SQL statements With a stored procedure, the database engine performs query analysis and optimization and caches the compiled query optimization plan when the stored procedure is first created On subsequent executions of the stored procedure, the database engine can bypass the analysis, optimization, and compilation To execute a submitted batch of SQL statements, on the other hand, the entire process must be performed each time a batch is submitted Listing 612 shows a stored procedure that updates name and price information for a specified product We use this stored procedure, named procModifyProductInfo, during this discussion It is not the most efficient code ever written, but it is straightforward and readable, and it adheres to the SQL Server convention that successfully executed procedures should return 0.

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Looking at the function call, it is now signi cantly clearer what each parameter refers to in effect, the code has documented itself.

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Note that the BitLocker encryption takes effect only if the machine is shut down (that is, powered off, either via shutdown or hibernate) If a machine is placed in sleep mode, then upon waking, BitLocker checking is not performed (For example, no USB key is required for disk access) Therefore, set machines to hibernate after a short period of time in sleep mode This is more of an issue for laptops than for servers, but it is a consideration The con guration to enable the TPM needs to be done in the BIOS of the computer The TPM Windows Management Instrumentation (WMI) interface provides some capability to enable elements of TPM, which are exposed with the manage-bdewsf script via the -tpm switch However, there is normally still BIOS-level con guration needed that is facilitated via a reboot A TPM MMC snap-in is also available for aspects of the TPM management, and it can be launched via tsmmsc It is possible to con gure BitLocker without a TPM Doing so requires the use of a USB key for each computer boot, but this is an option for nonTPM-capable hardware You can modify the computer s policy to enable non-TPM BitLocker, which you can do by editing the local computer policy or by setting a Group Policy Object (GPO) that is applied to the applicable servers The setting is in the Computer Configuration, Administrative Templates, Windows Components, BitLocker Drive Encryption area, and you need to enable Control Panel Setup: Enable Advanced Startup Options and set the Allow BitLocker Without a Compatible TPM option, as shown in Figure 4-2 BitLocker drive encryption is a feature in Windows Server 2008 that is not installed by default; add it via the Add Features Wizard, which you access via Server anager After you install it, restart the server To install on the server core, use the ocsetup command, as in the following example:.

I ve discussed some of the things to consider when de ning your class, but before concluding this chapter, it s worth brie y describing the functions that the compiler generates for you if you don t add them yourself If you have not declared a copy constructor, assignment operator or destructor, the compiler generates them implicitly for a class in case they need to be invoked If there are no constructors declared, it declares a default constructor too The implicitly-generated functions are public; the constructor and destructor are simply placeholders for the compiler to add the code required to create and destroy an object of the class (for example, to set up or destroy the virtual function table) The destructor does not perform any cleanup code The compiler-generated copy constructor and assignment operator perform a copy or assignment on each member of your class, invoking the copy constructor or assignment operator if there is one de ned, or applying the rule for the members of the encapsulated object if not Built-in types, pointers and references are copied or assigned using a shallow bitwise copy This is problematic for pointers to objects on the heap, since a bitwise copy is rarely desirable, opening up opportunities for dangling pointers; these can result in a memory leak or multiple deletion through the same pointer, which raises a panic (USER 44) This is particularly true for CBase-derived classes which should be constructed through the NewL() and NewLC() functions, which are guaranteed to initialize the object correctly using wo-phase construction (as described in 4) They should not be copy constructed or assigned to, because this bypasses the two-phase construction and makes shallow copies of any pointers to dynamic memory To prevent accidental copies, CBase declares a private copy constructor and assignment operator (as you ll see from the class de nition in e32baseh) Declaring, but not de ning, a private copy constructor and assignment operator prevents calling code from performing invalid copy operations using compiler-generated code If your C class does need a copy constructor, you must explicitly declare and de ne one publicly or provide a CloneL() or CopyL() method, which allows you to make leaving calls, which are not possible in a copy constructor.

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Repair a Broken Internet Connection in Java Encode PDF 417 n Java Repair a Broken Internet Connection. Common symptoms of this problem include a suddenly slow Internet connection, web pages that stall or are unresponsive, or the complete inability to access the Internet To determine if your rewall is the cause of your problems, you can temporarily disable it. Using Barcode reader for Visual Studio .NET Control to read scan read, scan image in Visual Studio .NET applications.Related: Generate Code 39 VB.NET , Generate Code 39 Excel , Interleaved 2 of 5 Generating VB.NET

by extracting one-half of the assignment statement to a parameter. . 39 In Visual Basic .NET Using Barcode printer for VS .Sometimes you want to assign a field inside an object to a alue provided by another object If the field is already assigned to a local value, you can extract one-half of the assignment statement to a parameter so that a client can supply the field's value rather than the host object I needed this refactoring after performing Replace Inheritance with Delegation [F] At the end of that refactoring, a delegating class contains a field for an object it delegates to (the delegatee) The delegating class assigns this delegate field to a new instance of the delegate Yet I needed a client object to supply the delegate's value Extract Parameter allowed me to simply extract the delegate instantiation code to a parameter value supplied by a client.Related: QR Code Generating Java , C# QR Code Generating Image, QR Code Generating VB.NET

Figure 7-25: List Definition from Content Type Wizard in Visual Studio .NET Encode QR Code in isual Studio .NET Figure 7-25: List Definition from Content Type Wizard. Code 128C Creation In Java Using Barcode generation for .Earlier in this chapter we mentioned how content type site columns can be used with Office documents This means we can access the data n a column from a client application such as Word In this section we will show how to associate a Word document with a content type and how to use Word s Document Panel to show columns associated with the content type We will also show how to use Word s content controls to display the data from the content type s columns directly in the document We will also show how to associate a Visual Studio document customization with a document associated with a content type Another nice feature SharePoint offers in connection with content types is the ability to associate SharePoint workflows with content types We will learn how to associate a workflow with a content type in this section as well Workflow is considered in more detail in 8, SharePoint Workflow .Related: Excel EAN-8 Generating , C# ITF-14 Generation , Generate Code 39 Java

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