barcode reader integration with asp net PARE NT-C HILD RELA TION SHIPS in .net C#

Display pdf417 2d barcode in .net C# PARE NT-C HILD RELA TION SHIPS

Figure 16-5. The code structure of MyTimerClass The Timer class is a useful tool, so I ll mention a little more about it. First, it has a public event called Elapsed. If that sounds familiar, it s because I named the event in MyTimerClass after it. The names have no other connection than that. I could have named the event anything. One of the properties of Timer is Interval, which is of type double, and specifies the number of milliseconds between raising the event. The other property I use is Enabled, which is of type bool, and starts and stops the timer.

Task.WaitAny()

In the previous example, we made a change that affected just one object, leaving the other object we had created unmodified. There is an important variation on this example that warrants careful attention. If you have been wondering why I keep laboring the difference between reference and value types, well, this is one of the reasons. Let s start with a value type and add a new member to our VolvoC30 class. Here is the modified class: public class VolvoC30 { public string CarOwner; public string PaintColor; public int MilesPerGallon = 30; public int ServiceInterval; public VolvoC30(string newOwner, string paintColor, int serviceInt) { CarOwner = newOwner; PaintColor = paintColor; ServiceInterval = serviceInt; } public int CalculateFuelForTrip(int tripDistance) { return tripDistance / MilesPerGallon;

public void PrintValue() Accessed from inside the class { Console.WriteLine("Value from inside: {0}", MyValue); } } class Program { static void Main() Accessed from outside the class { Console.WriteLine("Init Value: {0}", Trivial.MyValue); Trivial.MyValue = 10; Accessed from outside the class Console.WriteLine("New Value : {0}", Trivial.MyValue); Trivial tr = new Trivial(); tr.PrintValue(); } } Init Value: 0 New Value : 10 Value from inside: 10

The first step in the process, then, is to assemble a list of the nouns in the use case write-ups. By using a bit of judgment, you can eliminate a few nouns that are obviously not objects, but still end up with a good-sized list of potential business objects or entities, as shown in Table 3-1.

class Program { static void Main() { MyClass mc = new MyClass(); Console.WriteLine("Max: {0}", mc.ReturnMaxSum(30)); Console.WriteLine("Max: {0}", mc.ReturnMaxSum(5)); } }

Object containing read-write properties; object can be retrieved/stored directly to database Object containing read-write properties; object is contained within another object and cannot be retrieved/stored directly to database List object containing editable child objects; list can be retrieved/stored directly to database List object containing editable child objects; list is contained within another object and cannot be retrieved/stored directly to database List object containing editable root objects; list is retrieved directly from database Object that executes a command on the application server and reports back with the results Object containing read-only properties; object can be retrieved directly from database Object containing read-only properties; object is contained within another object and cannot be retrieved directly from database List containing read-only child objects; list can be retrieved directly from database List containing read-only child objects; list is contained within another object and cannot be retrieved directly from database List object containing read-only name/value objects

Most of the effects in jQuery are overloaded, allowing fine-grained control (see Table 12-6). Table 12-6. Different overloads of fadeOut method

You can create your own formats for string representations of DateTime values by passing a format string to the DateTime.ToString method. Listing 22-15 provides a simple demonstration. Listing 22-15. Creating a Custom DateTime String Representation using System; class Listing 15 {

To ensure that values are not null, you have probably written code similar to the following many times: public void myFunction(string input) { if(input==null) throw new System.NullReferenceException("Input cannot be null"); } Or perhaps you utilized the debug or trace assert like so: Debug.Assert(input != null); Code contracts are superior to the previous methods because they do the following: Allow the creation of more complex rules Can help you write better code by getting you to think about constraints within your code Can reduce/prevent side effects

The DrawableModel class contains all the information and functionality required to render a Model to the 3D scene: class DrawableModel { private Matrix worldMatrix; private Model model; private Matrix[] modelTransforms; private Vector3 position; private int modelID; public Matrix WorldMatrix { get { return worldMatrix; } set { worldMatrix = value; position = new Vector3(value.M41, value.M42, value.M43); } }

You should first store all the data you want to send to other players in the PacketWriter. You can do this by passing your data as the argument to its Write method: writer.Write(gameTime.TotalGameTime.Minutes); writer.Write(gameTime.TotalGameTime.Seconds); After you ve stored all your data in the PacketWriter, you can send it over to all the other players using the SendData method of your local player: LocalNetworkGamer localGamer = networkSession.LocalGamers[0]; localGamer.SendData(writer, SendDataOptions.None); The SendDataOptions argument will be explained at the end of this recipe. Quite important, the SendData method has an overload that allows you to send data to a specific player only, instead of to all players connected to the session.

1000000 rows created. Statistics ---------------------------------------------------------2963 recursive calls 133438 db block gets 44024 consistent gets 15218 physical reads 122853436 redo size 932 bytes sent via SQL*Net to client 1006 bytes received via SQL*Net from client 4 SQL*Net roundtrips to/from client 4 sorts (memory) 0 sorts (disk) 1000000 rows processed As you can see, that INSERT generated about 122MB of redo; we were expecting that because of the prior example in PL/SQL.

Let s build a simple user interface for the Silverlight text chat application. First, put the following selfexplanatory XAML in the MainPage.xaml file: <UserControl x:Class="chapter5Socket.MainPage" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:mc="http://schemas.openxmlformats.org/ markup-compatibility/2006" mc:Ignorable="d" d:DesignHeight="300" d:DesignWidth="400"> <StackPanel x:Name="LayoutRoot" Background="White"> <ScrollViewer x:Name="Scroller" Height="200"> <TextBlock x:Name="Messages" TextWrapping="Wrap"/> </ScrollViewer> <StackPanel Orientation="Horizontal"> <TextBlock Text="Enter your name: "/> <TextBox x:Name="txtName" MaxLength="20" Width="200"/> <Button x:Name="btnConnect" Width="100" Content="Connect" Click="btnConnect_Click"/> </StackPanel> <StackPanel Orientation="Horizontal" Margin="0,10,0,0" > <TextBox x:Name="txtMessage" MaxLength="200" Height="100" Width="300"/> <Button x:Name="btnSend" Width="100" Click="btnSend_Click" Content="Send"/> </StackPanel>