4-5: The Log Information in C#

Creating Code39 in C# 4-5: The Log Information

SystemNet Information: 0 : WebRequest::Create(ftp://ftpcsharpfordummiesnet/ samplebmp) SystemNet Information: 0 : Exiting WebRequest::Create() -> FtpWebRequest#37460558 SystemNet Information: 0 : FtpWebRequest#37460558::GetResponse() SystemNet Information: 0 : Exiting FtpWebRequest#37460558::GetResponse() SystemNet Information: 0 : Associating Message#59487907 with HeaderCollection#23085090 SystemNet Information: 0 : HeaderCollection#23085090::Set(mime-version=10) SystemNet Information: 0 : Associating MailMessage#6964596 with Message#59487907 SystemNet Information: 0 : SmtpClient::ctor(host=241231573) SystemNet Information: 0 : Associating SmtpClient#17113003 with SmtpTransport#30544512 SystemNet Information: 0 : Exiting SmtpClient::ctor() -> SmtpClient#17113003 SystemNet Information: 0 : SmtpClient#17113003::Send(MailMessage#6964596) SystemNet Information: 0 : SmtpClient#17113003::Send(DeliveryMethod=Network) SystemNet Information: 0 : Associating SmtpClient#17113003 with MailMessage#6964596 SystemNet Information: 0 : Associating SmtpTransport#30544512 with SmtpConnection#44365459 SystemNet Information: 0 : Associating SmtpConnection#44365459 with ServicePoint#7044526 SystemNet Information: 0 : Associating SmtpConnection#44365459 with SmtpPooledStream#20390146 SystemNet Information: 0 : HeaderCollection#30689639::Set(content-transferencoding=base64) SystemNet Information: 0 : HeaderCollection#30689639::Set(content-transferencoding=quoted-printable) SystemNet Information: 0 : HeaderCollection#23085090::Remove(x-receiver) SystemNet Information: 0 : HeaderCollection#23085090::Set(from=bill@sempfnet) SystemNet Information: 0 : HeaderCollection#23085090::Set(to=bill@sempfnet) SystemNet Information: 0 : HeaderCollection#23085090::Set(date=1 Apr 2010 16:32:32 -0500) SystemNet Information: 0 : HeaderCollection#23085090::Set(subject=FTP Successful) SystemNet Information: 0 : HeaderCollection#23085090::Get(mime-version) SystemNet Information: 0 : HeaderCollection#23085090::Get(from) SystemNet Information: 0 : HeaderCollection#23085090::Get(to) SystemNet Information: 0 : HeaderCollection#23085090::Get(date) SystemNet Information: 0 : HeaderCollection#23085090::Get(subject) SystemNet Information: 0 : HeaderCollection#30689639::Get(content-type) SystemNet Information: 0 : HeaderCollection#30689639::Get(content-transferencoding) SystemNet Information: 0 : Exiting SmtpClient#17113003::Send()

Reading this file, you can see that the reference numbers that match the requests on the server all appear, dramatically improving the ease of debugging Also, because everything is in order of action, finding out exactly where the error occurred in the process is much easier

Understanding the SystemDrawing namespace Finding out how the drawing classes fit into the NET Framework Using SystemDrawing to create a simple game application

o one is going to write the next edition of Bioshock using C# It just isn t the kind of language you use to write graphics-intensive applications like shoot- em-up games Still, C# packs a fair amount of power into the SystemDrawing classes Though these classes are somewhat primitive in some areas, and using them might cause you to have to write a few more lines of code than you should, there isn t much that these classes can t do with sufficient work The drawing capability provided by the NET Framework is divided into four logical areas by the namespace design provided by Microsoft All the general drawing capability is in the SystemDrawing namespace Then there are some specialized namespaces: SystemDrawing2D has advanced vector drawing functionality SystemDrawingImaging is mostly about using bitmap graphic formats, like bmp and jpg files SystemDrawingText deals with advanced typography In this chapter, I focus on the base namespace and cover only the basics of drawing in C# (Discussing every aspect of drawing could easily fill an entire book)

Even at the highest level, graphics programming consists of drawing polygons, filling them with color, and labeling them with text all on a canvas of some sort Unsurprisingly, this leaves you with four objects that form the core of the graphics code you write: graphics, pens, brushes, and text

Generally speaking, the Graphics class creates an object that is your palette It s the canvas All the methods and properties of the Graphics object are designed to make the area you draw upon more appropriate for your needs Also, most of the graphics- and image-related methods of other classes in the framework provide the Graphics object as output For instance, you can call the SystemWebFormsControlCreateGraphics method from a Windows Forms application and get a Graphics object back that enables you to draw in a form control in your project You can also handle the Paint event of a form, and check out the Graphics property of the event Graphics objects use pens and brushes (discussed later in this chapter, in the Pens and Brushes sections) to draw and fill Graphics objects have methods such as these: DrawRectangle FillRectangle DrawCircle FillCircle DrawBezier DrawLine These methods accept pens and brushes as parameters You might think, How can a circle help me but you must remember that even complex graphic objects such as the Covenant in Halo 3 are made up of circles and rectangles thousands of them The trick to useful art is using math to put together lots of circles and squares until you have a complete image The sample application described later in this chapter is a simple example of just that