Crse3359ae Lab01
You want to customize the way in which the values for certain members of the CRM and Customer class are stored in a target XML file during serialization. For this, you need to apply appropriate XML attributes to the members of the Customer and CRM class. The principal tasks for this exercise are Open an existing Console application. Apply XML attributes to the members of a class. 1. Open an existing Console application. Open Microsoft Visual Studio 2005. Locate and open the existing Console...
Task 1 Open an existing application
1. On the Start menu, point to All Programs, point to Microsoft Visual Studio 2005, and then click Microsoft Visual Studio 2005. 2. To open an existing console application, in Microsoft Visual Studio 2005, click File, point to Open, and then click Project Solution. 3. To locate the existing console application, in the Open Project dialog box, click the Look in list, and then open the folder For Visual Basic 2005 For C 4. Double-click the crse3368ae_lab01.sln file.
Filtering Data with WHERE
In the previous example, we selected all records from certain columns in the Products table. What if we only want to see products that sell for less than 25 When we want to filter data so that only records meeting certain criteria are retrieved, we can use a WHERE clause in our SQL statement, as shown below SELECT ProductName, UnitPrice, UnitsInStock FROM Products WHERE UnitPrice lt 25 The WHERE clause specifies that the UnitPrice should be less than 25, so that the above SQL statement will...
Selfreview Exercises Lle
State whether the following are true or false. If false, explain why. a XML is a technology for creating markup languages. b XML markup text is delimited by forward and backward slashes and . c Arabic characters can only be placed in to an XML document using an Arabic language keyboard. d Unlike HTML, all XML start tags must have corresponding end tags. e Parsers check an XML document's syntax and may support the Document Object Model and or the Simple API for XML. f An XML document is...
Comparing WCF Serialization Options
There are many ways to use serialization objects using WCF. Determining which mechanism to use for serialization depends on a number of factors. These include whether you want to share types or contracts, support existing .NET types, preserve references, and more. The default serialization mechanism for WCF is the DataContractSerializer. This class can be found in the System.Runtime.Serialization namespace. The DataContractSerializer is built to support the sharing of contracts based on XSD...
Calling the stored Procedure
Calling the stored procedure is just a matter of creating a SqlConnection object to connect to the database, and a SqlCommand object to run the stored procedure. Now you have to decide what you want to return by calling the stored procedure. In this case, you return an instance of the SqlDataReader object. The TestForm.vb file contains a method called GetAuthorSqlReader that takes an author ID and returns an instance of a SqlDataReader. Here is the code for the method Private Function...
Deploy Performance Counter Categories and Counters with the
The easiest way to incorporate performance counters in your .NET application is to use PerformanceCounter components. You can use these components to read values from existing predefined counters, such as memory or processor counters, and you can also read from and write to custom counters that you create. For example, you might use the Server Explorer to create a new performance counter category named MyApp, and then create counters for monitoring your application performance, such as...
Updating Your DataSet by Using the DataTable and DataRow Objects
Earlier in this chapter, we showed you how to update your database by using parameterized stored procedures. Although this is efficient for making single row changes, it isn't quite useful when you have a significant number of changes to pass to the server. What happens when you want to apply changes in bulk Consider an e-commerce application that uses an online shopping cart. The shopping cart could have multiple rows of data that would be inserted and updated as the user browsed through the...
[i1 TicTacToe
Figure 9-1. Tic-tac-toe boards don't have rounded insets What we really want here is to be able to keep the behavior i.e., holding content and firing click events , but to take over the look of it. WPF allows this kind of thing because the intrinsic controls are built to be lookless i.e., they provide behavior, but the control's user can swap out the look completely . The default look comes from the system-provided template, as described in Chapter 12. Remember from Chapters 6 and 8 how we used...
Creating the Inherited Form
To explain how to create an inherited form. Creating an inherited form is simple. After you have designed your base form and built the solution, you are ready to begin deriving forms. To do this, you simply add a new item to the project by clicking Inherited Form in the Add New Item window. This will run the Inheritance Picker for you. When inheriting from a base Windows Form, consider the following guidelines carefully Ensure that the base form is as complete as possible. Make any last minute...
Displaying Help as Web Forms or HTML
Creating your Help content as Web forms or HTML pages is probably the simplest approach to providing user assistance. The Help files can reside in either the same project folder as your Web application or in a subordinate folder. You use hyperlinks or other controls to display the Help in the browser, just as you would any other page, with one important difference you usually want to display Help in a new window or in a separate frame from the rest of the Web application, as shown in Figure...
Build All Builds with Debugging Symbols
Some of the debugging system recommendations that I do make aren't that controversial. I've been harping on my first recommendation for years build all builds, including release builds, with full debugging symbols. Debugging symbols are the data that let the debugger show you source and line information, variable names, and data type information for your program. All that information is stored in a .PDB Program Database file associated with your modules. If you're paid by the hour, spending...
Crse3358ae Lab01
You want to list the existing journal entries represented by individual files in a subdirectory named Entries. For this you need to use the DirectoryInfo class to retrieve the list of files in the corresponding subdirectory. The principal tasks for this exercise are as follows Open an existing Console application. Write code to list the existing journal entries by using the System.IO.DirectoryInfo class. 1. Open an existing Console application. Open Microsoft Visual Studio 2005. Locate and open...
The User Interface
So you've learned how to design a database and how to update information in it using suitable SQL statements. We can't expect our users to open up an administrative database tool and manipulate the data directly like this, so our next step is to create some way for users to access information. This is the role of the user interface - to provide a means of communication between the user and the database. Through the user interface, users may interact with data and manipulate it in order to...
Exercise 2 Create a Translator Class
In this exercise, you will create a Friend class to contain the logic and data that the Translator application uses. 1. From the Project menu, choose Add Class. Visual Studio displays the Add New Item dialog box. Name the class TranslatorClass.vb and click Open. 2. In the code window, add the following code Private mstrText As String Private mstrOriginal As String ' Controls access to the module-level ' variables. Public Property Text As String Get Set ByVal Value As String mstrText Value '...
String Constants
If you ever have to produce output based on a string you'll quickly find yourself needing to embed certain constant values. For example, it's always useful to be able to add a carriage-return linefeed combination to trigger a new line in a message box. One way to do this is to learn the underlying ASCII codes and then embed these control characters directly into your String or StringBuilder object. Visual Basic provides an easier solution for working with these the...
Graphics Drawlmage Methods selection
void DrawImage Image image, int x, int y, int cx, int cy void DrawImage Image image, float x, float y, float cx, float cy void DrawImage Image image, Rectangle rect void DrawImage Image image, RectangleF rectf These methods scale the image to the size of the rectangle, either stretching or compressing it to fit. One common use of these methods is to display an image in its pixel size rather than its metrical size. If page units are pixels, simply call grfx.DrawImage image, x, y, image.Width,...
Defining the IDataLibPlugin interface
At the heart of the data tier lies the IDataLibPlugin interface. It contains a set of method definitions that define how the sales force application communicates with the SQL Server CE and Oracle Lite databases. An interface is a collection of method definitions without the implementation . A class that implements an interface has to provide implementations for each and every defined method of the interface. Interfaces are great for defining a consistent set of behavior that different classes...
ToolStrip Basics
The ToolStrip is the basis of the StatusStrip, MenuStrip, and ContextMenuStrip controls you'll consider in this chapter, and a slick stand-alone control of its own. To get off to a quick start with ToolStrip, drag it onto a form, select it, and choose Insert Standard Items from the smart tag. This adds a basic set of buttons including File, Open, Save, and Print, the editing commands Cut, Copy, and Paste, and a Help button. When you run this example, you'll immediately notice that the ToolStrip...
Frequently Asked Questions Dme
The following Frequently Asked Questions, answered by the authors of this book, are designed to both measure your understanding of the concepts presented in this chapter and to assist you with real-life implementation of these concepts. To have your questions about this chapter answered by the author, browse to www.syngress.com solutions and click on the Ask the Author form. Q I attempted to delete a BizTalk server from the BizTalk Server Group in the BizTalk Server Administration Microsoft...
DateTimePicker Controls
The DateTimePicker is a fairly complex control that allows the display and editing of formatted date and time information. It looks like a ComboBoxwith the date and time information displayed in text form within it. The formatting of that display can be set based on a number of predefined formats or by using a custom formatting string. When the drop-down arrow is selected, a calendar control appears, allowing an intuitive and rich date selection mechanism. The ValueChanged event is the default...
Lab Working With Site Navigation
In this lab, you create a Web application using frames. The top frame contains a title for your Web application and a SiteMapPath control. The left frame contains a Tree-View control for navigation. Clicking any node on the TreeView or SiteMapPath controls cause the main frame to load the desired page. Exercise 1 Create the Web Application Project and Its Frames In this exercise, you create the Web application project. You also configure Default.aspx to be a frames page and add the top and left...
ToolStripDropDownButton
The ToolStripDropDownButton allows you to create a drop-down menu that appears when the button is clicked. At design time, you can create the menu by typing text for menu items in the menu designer, as shown in Figure 4-2. Figure 4-2 Creating a menu with the ToolStripDropDownButton Figure 4-2 Creating a menu with the ToolStripDropDownButton Each menu item has its own ToolStripMenuItemClick event that you can respond to.
Working with Server Performance Counters
As we examined in Accessing the Windows Event Log, the .NET Framework contains a System.Diagnostics namespace that houses classes which can be used for diagnostic information. One such class is the EventLog class, which we just looked at in the previous section another useful diagnostics class is the PerformanceCounter class. This class gives the developer direct read access to the existing Windows Performance counters and provides the capability to create new performance counters Because this...
Core Concepts
Producing .NET applications and components requires a compiler that translates source code into IL code. VS.NET, Microsoft's new version of Visual Studio, contains three such compilers VB.NET, C , and managed C . While a full examination of these languages is beyond the scope of a CodeNote, each language is briefly discussed below. Code examples throughout this book will demonstrate some of the nuances of each language and the syntactical differences between them. In addition to the IDE, VS.NET...
PrintPreviewDialog
The PrintPreviewDialog component displays a dialog box that allows the user to view a document before printing it. Prior to showing the dialog box, the PrintPreviewDialog object must be loaded with information about the document to be printed. See Printing in Chapter 4 for details. The dialog box itself displays a preview of the printed version of the document, allowing the user to navigate through it. Figure 5-20 shows an example of the PrintPreviewDialog dialog box, although this example...
Customizing Your Installer
In most cases, a standard installer with default options is not sufficient to meet the deployment requirements of an application. You may need to add dialog boxes, text, Help files, and more, to your setup program. In Visual Basic 6.0, this required you to either modify the setup script file or modify the Setup1.exe project template used by the wizard. In Visual Basic .NET, you can use the project's properties and the editors provided in Visual Studio .NET to make these changes. The editors are...
Root Elements
Root elements are special derivations of panel elements. They serve as the fundamental containers for pages. Every page requires exactly one root element. In the next chapter, when we build an application with Visual Studio, you will notice that the default root element is Grid. It is not uncommon for other panel elements e.g., StackPanel, DockPanel, or Canvas, as well as Page and Window to serve as root elements. The root element must contain a reference to the namespace needed by the other...
Voice In The World Of Net
.NETDeveloper's Journal is the leading independent monthly publication targeted at .NET developers, particularly advanced developers. It brings .NET developers everything they need to know in order to create great software. Published monthly, .NET Developer's Journal covers everything of interest to developers working with Microsoft .NET technologies - all from a completely independent and nonbiased perspective. Articles are carefully selected for their prime technical content - technical...
Create
The account administration would be quite useless if you couldn't create a new account. Figure 12-5 shows the AdmAcntCreate Web page that is designed for this task. n Adjnhiiitrai amp rj . Uidliui Crcatt Tr'j i l- L -L-I K in n i. ' v.Li MI M I Figure 12-5 The AdmAcntCreate Web page Looking at Figure 12-5, you should spot something you haven't used before the multiselect list box. The list box stores all the possible roles in the system that a user can have. Listing 12-21 shows the design code...
Using a Custom Proxy
In the previous parts of this chapter, you read about the possible ways you can extend the .NET Remoting framework using additional custom message sinks. There is another option for changing the default behavior of the remoting system custom proxy objects. Figure 13-12 shows you the default proxy configuration. Figure 13-12. The default combination of proxy objects Figure 13-12. The default combination of proxy objects You can change this by replacing RemotingProxy with a custom proxy that...
Opening a child form
The Open menu in the parent form should work much like the now hidden Open menu for the MainForm class. The handler for this menu should display an Open-FileDialog and create a new child window containing the selected album. To create the MainForm instance, we will create a new constructor that accepts an album file name with which to initialize the window. The code required here is nothing new to us, so let's get to it. IMPLEMENT HANDLER FOR OPEN MENU IN PARENT FORM Add a using statement for...
Building and Consuming a Multifile Assembly
Now that you have constructed and consumed a single-file assembly, let's examine the process of building a multifile assembly. Recall that a multifile assembly is simply a collection of related modules which has nothing to do with the Visual Basic 2008 Module keyword that are deployed and versioned as a single logical unit. At the time of this writing, Visual Studio 2008 does not support a VB 2008 multifile assembly project template. Therefore, you will need to make use of the command-line...
Caps and Joins
As the PenDashStyle program indicates, when lines start to get wide, they assume a graphical form of their own. You may like the square and rectangular appearance of the dots and dashes in styled lines, but you may prefer a more rounded appearance instead. This is the realm of line caps also known as ends and joins. The cap governs the appearance of the lines at their beginning and end, or the appearance of the dots and dashes. The join governs what happens at the meeting of two connected...
Creating and Using Controls
In this exercise, you will begin by opening an existing Windows Forms application. You will add a ToolBar control to the main form of the application, add the appropriate number of buttons to the ToolBar control, and set values for each of the buttons. After the design for the toolbar is complete, you will develop the code that handles the ButtonClick event of the toolbar and responds appropriately for each of the different buttons. You will then develop the code statements required to create...
Nested framesets
You can use the frameset element to create more complex layouts in a framed Web site by nesting frameset areas as in Fig. 3.10. The first level of frameset tags is on lines 21 and 22 frameset cols 110, gt frame name navsrc nav.html gt The frameset and frame elements here are constructed in the same manner as in Fig. 3.9. We have one frame that extends over the first 110 pixels starting at the left edge. The second nested level of the frameset element covers only the remaining frame area that...
String CompareOrdinal Static Method
int CompareOrdinal string str1, string str2 int CompareOrdinal string str1, int iStartIndex1, string str2, int iStartIndex2, int iCount The static Compare methods perform a lexical comparison String Compare Static Method int Compare string str1, string str2 int Compare string strl, string str2, bool blgnoreCase int Compare string strl, string str2, bool blgnoreCase, Culturelnfo ei int Compare string strl, int iStartlndexl, string str2, int iStartIndex2, int iCount int Compare string strl, int...
Detecting context switching
The Performance Monitoring program perfmon.exe is useful in determining how many context switches are occurring per second. In Windows 2000 the Performance Monitoring program is located in the Administrative Tools group under Programs in the Start menu. Figure 1.4 shows the impact of executing the program in listing 1.9. The four bumps in the graph occurred during the time between when Created x Workers was written to the console and when Stopped x Workers was written to the console. Not...
The QuickWatch Dialog Box
You use the QuickWatch dialog box to, as its name implies, quickly evaluate a variable or expression. Figure 12-20 shows a QuickWatch dialog box. Figure 12-20 The QuickWatch dialog box The QuickWatch dialog box is an alternative to the Watch window. The QuickWatch dialog box provides a quicker, simpler way of evaluating or editing a single variable or expression than does the Watch window. However, QuickWatch is a modal dialog box, so unlike the Watch window, you cannot leave the QuickWatch...
Adding a toggle button
Our final toolbar button will illustrate the ToggleButton style to show and hide the pixel data dialog created in chapter 8. Toggle buttons, as you may recall from chapter 9, provide two different states one when the button is pressed in, and one when it is not. We will do something a little different here that seems appropriate for our example. If you are keeping track of the images available in our image list, you may realize there are two images left, while only one more button. We will use...
The Common Language Specification
COM allows objects created in different languages to communicate with one another. On the other hand, the CLR now integrates all languages and allows objects created in one language to be treated as equal citizens by code written in a completely different language. This integration is possible because of the CLR's standard set of types, self-describing type information metadata , and common execution environment. While this language integration is a fantastic goal, the truth of the matter is...
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Figure 4-1 Overflow error while project is running Since an Integer data type can represent any whole number that you can represent with a Byte data type, and has a far greater range, you could avoid, or at least minimize, overflow errors by always using the Integer data type instead of the Byte data type. However, there is a downside to this solution. While the Byte data type only requires 1 byte of memory, the Integer data type requires 4. The difference between 1 and 4 bytes might seem...
Overview of the NET Mobile Architecture
The Mobile Internet Toolkit is built on the Microsoft ASP.NET Web Forms which we discuss in more detail in Chapter 3 . Just as the ASP.NET WebControls provide an improved level of cross browser platform independence in your applications, the Mobile Controls give you an improved level of cross-mobile, devie platform independence.The toolkit includes a set of Mobile Controls that is executed by the Mobile Internet Controls runtime during the execution phase. The key feature of the runtime is its...
CallContext Class
The CallContext class allows you to carry additional properties within the message exchanged between the client and the server. Therefore, you can include some additional metadata that can be used either by the server or by the client. This metadata has nothing to do with the actual business logic but more with some infrastructural topics. Typical examples are things like security-related information as authentication method and encryption method. Another example is including some message IDs...
Description 1
Specifies whether the program element is CLS-compliant. The CLSCompliantAttribute class constructor is Public Sub New ByVal isCompliant As Boolean The isCompliant parameter indicates whether the program element is CLS-compliant. The CLSCompliantAttribute class has a single property Indicates whether the program element is CLS-compliant. The type is Boolean. See Chapter 3 for information on the CLS and on what it means for a program element to be CLS-compliant.
Using a StreamWriter to Save Control Values to a File
To get started with saving the Text values of controls, add two buttons to the form, called btnWriteControls and btnReadControls. Next, add a bunch of TextBoxes to the form. These will be used for writing and retrieving values. It really doesn't matter what they are called or what values they show initially, so you can accept the default names and values TextBox1, TextBox2, and so on . It also doesn't matter how many or few there are, because the StreamWriter object, using the code I'll show...
IDL Parameter Attributes
COM interface method parameters also take IDL attributes that are used to disambiguate how a given argument is to be marshaled across a given process boundary. You examine the exact details of IDL parameter attributes in greater detail in Chapter 4. For
Monitoring Performance Counters
Once you create performance counter objects, you must provide data for these counters to be useful. First, you must add a PerformanceCounter object to your application. When developing a Windows Forms application, you can add a Performance-Counter object to a form using the Designer. However, when developing an ASP.NET Web form, you must add the PerformanceCounter object programmatically. The following code sample reads the ASP.NET Requests Queued performance counter and displays the value in...
Loading and Controlling Extensions
Before we start looking at individual extension commands, I need to talk about how you can see which extensions you've loaded, how to load your own, and how to get help from an extension. To see what extensions you have loaded, use the .chain List Debugger Extensions command. This command also shows you the search order for commands from the top of the display down to the bottom as well as the path that WinDBG searches for the extension DLLs. Under Windows 2000, the display looks like the...
Listing 81 DataGridView OnCellFormatting Method Override
protected override void OnCellFormatting DataGridViewCellFormattingEventArgs args Call home to base base.OnCellFormatting args First row always displays if args.Rowlndex 0 return args.Value string.Empty args.FormattingApplied true private bool lsRepeatedCellValue int rowlndex, int collndex Rows rowlndex ,Cells collndex DataGridViewCell prevCell Rows rowlndex - 1 .Cells collndex if currCell.Value prevCell.Value currCell.Value null amp amp prevCell.Value null amp amp currCell.Value.ToString...