... Web Project 27 Chapter Basic Data Manipulation Techniques 57 Chapter Using Collections to Store Data Chapter Working with XML 125 Chapter Accessing a Web Service 151 Chapter Using the Windows ... license agreement If you accept the terms, select the accept option, and then click Next Note If the license agreement doesn’t appear, you can access it from the same webpage from which you downloaded ... at least some code to create most applications Of course, before you can create a C# application, you need some sort of tool to create it with (Technically, you could write an application using...
... significant figures decimal coin; coin = 0.42M; 32 Part I Introducing MicrosoftVisual C# and MicrosoftVisual Studio 2010 Data type Description Size (bits) Range Sample usage string Sequence of characters ... the Location box Type a name for the project Click OK Create a new graphical application using Visual C# 2010 Express On the File menu, click New Project to open the New Project dialog box For ... the Location box Type a name for the project Click OK Create a new console application using Visual C# 2010 Express On the File menu, click New Project to open the New Project dialog box For the...
... the MicrosoftWindows operating system, the code for character ‘0’ has integer value 48 The code for character ‘1’ is 49, the code for character ‘2’ is 50, and so on up to the code for character ... Introducing MicrosoftVisual C# and MicrosoftVisual Studio 2010 list box, select MathsOperators – MicrosoftVisual Studio: Visual Studio 2010 and then click Yes: If you are using Visual C# 2010 ... the catch block for the FormatException exception runs If the code throws an OverflowException e xception, the catch block for the OverflowException exception runs Note If the code in the FormatException...
... instance is created You access the NumCircles field by specifying the Circle class rather than a Circle object For example: Console.WriteLine("Number of Circle objects: {0}", Circle.NumCircles); ... c as a Circle (the name of a class) is very different When you declare c as a Circle, c can refer to a Circle object If you declare refc as another Circle, it can also refer to a Circle object ... assigned a reference to another instance of the Circle class: Circle c = new Circle(42); Circle copy = new Circle(99); copy = c; // Some random value, for initializing copy // copy and c refer to the...
... reference type, you will have two references to the same object For example: Circle c = new Circle(42); Circle refc = c; Declare a variable that can hold a value type or the null value Declare ... Structure instances are called values and live on the stack Class instances are called objects and live on the heap Can you declare a default constructor? No Yes If you declare your own constructor, ... int CardsPerSuit = 13; private PlayingCard[,] cardPack; private Random randomCardSelector = new Random(); } 10 Locate the default constructor for the Pack class Currently, this constructor...
... Circle(100); if (myCircle is IDraw) { IDraw drawCircle = myCircle; drawCircle.SetLocation((int)mouseLocation.X, (int)mouseLocation.Y); drawCircle.Draw(drawingCanvas); } } if (myCircle is IColor) ... objects according to the collating sequence of the computer, and if the collection holds numeric objects such as integers, the collection should sort the objects numerically When you define the collection ... Ellipse(); } } this.circle.Height = this.radius; this.circle.Width = this.radius; Canvas.SetTop(this.circle, this.locY); Canvas.SetLeft(this.circle, this.locX); canvas.Children.Add(circle); This method...
... Encapsulate logical array-like access to an object by using indexers n Control read access to indexers by declaring get accessors n Control write access to indexers by declaring set accessors n Create ... locY fields Replace the existing constructor with the following code, which calls the constructor in the base class Notice that the body of this constructor is empty because the base class constructor ... the C# Language i nstantiate the shape field as a new Ellipse object The complete code for the Circle class should look like this: class Circle : DrawingShape, IDraw, IColor { public Circle(int...
... Location field specify the location Microsoft Press \Visual CSharp Step By Step\Chapter 22 under your Documents folder, and then click Save The new project is created and contains a blank form called ... expand Visual C# , and then click Windows 2.3 In the middle pane, click the WPF Application icon Chapter 22 Introducing Windows Presentation Foundation 2.4 In the Location field, type \Microsoft ... right-click the form, and then click View Code The Code and Text Editor window opens and displays the MainWindow.xaml.cs file so that you can add C# code to the form Chapter 22 Introducing Windows...
... member.IsCaptain = isCaptain.IsChecked.Value; member.MemberSince = memberSince.SelectedDate.Value; member.Methods = new List(); foreach (CheckBox cb in methods.Items) { if (cb.IsChecked.Value) ... writer.WriteLine("Captain: {0}", isCaptain.IsChecked.ToString()); writer.WriteLine("Member Since: {0}", memberSince.Text); writer.WriteLine("Methods: "); foreach (CheckBox cb in methods.Items) { if (cb.IsChecked.Value) ... right-click the Last Name text box On the shortcut menu, click the Clear Name command and again verify that both text boxes are cleared Right-click any controls except the Member Since control...
... type, which creates a SqlConnection object: static void Main(string[] args) { SqlConnection dataConnection = new SqlConnection(); } SqlConnection is a subclass of an ADO.NET class called Connection ... list box, click your user account In the Permissions for Account list box (where Account is your user account name), select the Allow check box for the Full Control entry, and then click OK 10 ... the connection string specified by the ConnectionString property of the dataConnection object to open a connection to the database If the connection is successful, you can use the dataConnection...
... optimistic concurrency.) The opposite of optimistic concurrency is pessimistic concurrency In this scheme, all data is locked in the database as it is fetched and no other concurrent users can access ... p.productID >= 79 select p; ObjectSet products = northwindContext.Products; foreach (var product in productList) { products.DeleteObject(product); } northwindContext.SaveChanges(); Be careful ... = northwindContext.Products.Single(p => p.ProductID == 14); product.ProductName = "Bean Curd"; northwindContext.SaveChanges(); } catch (OptimisticConcurrencyException ex) { northwindContext.Refresh(RefreshMode.ClientWins,...
... To cancel the wait operation, call the Cancel method of the CancellationTokenSource object For example: CancellationTokenSource cancellationTokenSource = new CancellationTokenSource(); CancellationToken ... System.ServiceModel.ClientBase, ProductClient.ProductInformationService.IProductInformation { public ProductInformationClient() { } public ProductInformationClient(string endpointConfigurationName) ... ProductClient.xaml.cs file: using ProductClient.ProductInformationService; using System.ServiceModel; In the calcCost_Click method, add the following code shown in bold: private void calcCost_Click(object...
... with Service Pack or later n MicrosoftVisual Studio 2010 Standard, Visual Studio 2010 Professional, or MicrosoftVisual C# 2010 Express and MicrosoftVisual Web Developer 2010 Express n Microsoft ... you are using Visual C# 2010 Express, on the MicrosoftWindows task bar, click the Start button, point to All Programs, and then click MicrosoftVisual C# 2010 Express Visual C# 2010 Express starts, ... environment n Create a C# console application n Explain the purpose of namespaces n Create a simple graphical C# application MicrosoftVisual C# is Microsoft s powerful component-oriented language C# plays...
... open; if you click Yes, the form closes and the application finishes 13 Click Yes to close the form 464 Part IV Working with Windows Applications Shortcut Menus Many Windows- based applications make ... box, click Yes (if you are using Visual Studio 20 08) or Save (if you are using MicrosoftVisual C# 20 08 Express Edition) and save the project Chapter 23 Quick Reference To Do this Create a menu for ... x:Class=”CustomerDetails.CustomerForm” xmlns=”http://schemas .microsoft. com/winfx/2006/xaml/presentation” xmlns:x=”http://schemas .microsoft. com/winfx/2006/xaml” xmlns:cust=”clr-namespace:CustomerDetails”...