AN OVERVIEW OF .NET ERROR HANDLING in Font

Creator PDF417 in Font AN OVERVIEW OF .NET ERROR HANDLING

CHAPTER 4 AN OVERVIEW OF .NET ERROR HANDLING
Draw PDF417 In None
Using Barcode printer for Font Control to generate, create PDF 417 image in Font applications.
www.OnBarcode.com
DataMatrix Generation In None
Using Barcode printer for Font Control to generate, create ECC200 image in Font applications.
www.OnBarcode.com
Figure 4-30. Creating a configuration file
Barcode Creator In None
Using Barcode drawer for Font Control to generate, create Barcode image in Font applications.
www.OnBarcode.com
Print PDF 417 In None
Using Barcode maker for Font Control to generate, create PDF417 image in Font applications.
www.OnBarcode.com
Note We are showing the C# version of this file; the VB .NET version includes many other setting and it looks pretty messy. If you are using VB .NET, you need to find the <switches> section and just add another tag inside of it, like the one shown previously. We have provided a demo of both the C# and VB .NET versions in the DownloadFiles\4\Exercises\DemoCode folder. You can find this folder on the Apress website (www.apress.com) in the Source Code section. See Appendix A for more download details.
QR Code Generator In None
Using Barcode generator for Font Control to generate, create QR Code 2d barcode image in Font applications.
www.OnBarcode.com
USS Code 39 Maker In None
Using Barcode encoder for Font Control to generate, create Code 3 of 9 image in Font applications.
www.OnBarcode.com
Of course, adding a switch to the configuration file will not have any impact if you do not associate the switch to a WriteIf() and WriteLineIf() statement. To do this you must create a new BooleanSwitch object and then provide the exact name of your switch from your configuration file (see Listing 4-10). You also must provide a description of the switch right after that, so that somebody looking at the configuration file later will know what it does. Lastly, you need to use the BooleanSwitch as the conditional of your WriteIf() and WritelineIf() statements. Since both of these statements will only run when a condition is true, all you need to do is check the status of the switch, as shown in Listing 4-10. You may also add new Listeners if you d like, as you did in Exercise 4-5. Listing 4-10. Using Switches VB .NET Private Sub Button1_Click _ (ByVal sender As System.Object, ByVal e As System.EventArgs) _ Handles Button1.Click
EAN13 Creation In None
Using Barcode printer for Font Control to generate, create European Article Number 13 image in Font applications.
www.OnBarcode.com
Generate OneCode In None
Using Barcode printer for Font Control to generate, create Intelligent Mail image in Font applications.
www.OnBarcode.com
CHAPTER 4 AN OVERVIEW OF .NET ERROR HANDLING
Reading PDF417 In Visual C#.NET
Using Barcode reader for .NET Control to read, scan read, scan image in Visual Studio .NET applications.
www.OnBarcode.com
PDF 417 Encoder In Visual Basic .NET
Using Barcode generator for VS .NET Control to generate, create PDF417 image in .NET framework applications.
www.OnBarcode.com
Dim BS1 As BooleanSwitch = New _ BooleanSwitch("MySwitch", "Decription: Toggles Trace") Dim objTWFile As TextWriterTraceListener = New _ TextWriterTraceListener("c:\SwitchDemo.txt") Trace.Listeners.Add(objTWFile) Trace.AutoFlush = True Trace.WriteLineIf(BS1.Enabled = True, "MyMessage", "MyCatagory") MessageBox.Show("Now look in SwitchDemo.txt when switch is on") objTWFile.Close() Trace.Listeners.Clear() End Sub C# private void button1_Click(object sender, EventArgs e) { //make sure to add using System.Diagnostics; at the top of the code file BooleanSwitch BS1 = new BooleanSwitch("MySwitch", "Decription: Toggles Trace"); TextWriterTraceListener objTWFile = new TextWriterTraceListener("c:\\SwitchDemo.txt"); Trace.Listeners.Add(objTWFile); Trace.AutoFlush = true ; Trace.WriteLineIf(BS1.Enabled == true, "MyMessage", "MyCatagory"); MessageBox.Show("Now look in SwitchDemo.txt when switch is on"); objTWFile.Close(); Trace.Listeners.Clear(); } One last note, when you are ready to deploy the .exe file for you application, you would send the configuration file along with it. When the .exe file and the configuration file are in the same folder, the Trace switch will be read and set to whatever value you have typed in. To change this setting later on, you would just open the file in a text editor, like Notepad, and change the 0 to 1. In this case, your Trace messages would then show up in the Windows Event log, but you could also make a Listener that sends it to a text file. If a developer includes these, you can easily continue testing and troubleshooting applications in a production environment. Since you may be the developer of your testware, you may want to include these features as well.
Scanning QR-Code In Java
Using Barcode recognizer for Java Control to read, scan read, scan image in Java applications.
www.OnBarcode.com
ANSI/AIM Code 39 Reader In Java
Using Barcode reader for Java Control to read, scan read, scan image in Java applications.
www.OnBarcode.com
CHAPTER 4 AN OVERVIEW OF .NET ERROR HANDLING
Code-39 Creation In Java
Using Barcode generation for Java Control to generate, create Code 39 Extended image in Java applications.
www.OnBarcode.com
QR Code Creator In Objective-C
Using Barcode generator for iPad Control to generate, create QR Code 2d barcode image in iPad applications.
www.OnBarcode.com
Summary
Read Barcode In VS .NET
Using Barcode Control SDK for ASP.NET Control to generate, create, read, scan barcode image in ASP.NET applications.
www.OnBarcode.com
Generating Barcode In None
Using Barcode encoder for Office Word Control to generate, create Barcode image in Microsoft Word applications.
www.OnBarcode.com
In this chapter, you looked at several different debugging tools that you can use in your test projects. These range from built-in windows and features of Visual Studio to customizations you can add to your testware. If you would like to learn more on this subject, check out the references in Appendix C for further information. There you will find a reference to Dan Appleman s Trace and Logging in .NET booklet, which we believe you will find quite good.
Code 39 Decoder In VB.NET
Using Barcode scanner for VS .NET Control to read, scan read, scan image in .NET applications.
www.OnBarcode.com
Barcode Generation In Java
Using Barcode maker for Java Control to generate, create Barcode image in Java applications.
www.OnBarcode.com
Tester s Checklist
Code 128C Printer In Objective-C
Using Barcode drawer for iPhone Control to generate, create Code 128 Code Set C image in iPhone applications.
www.OnBarcode.com
Universal Product Code Version A Recognizer In Visual Studio .NET
Using Barcode scanner for Visual Studio .NET Control to read, scan read, scan image in VS .NET applications.
www.OnBarcode.com
Use breakpoints to pause your program. Use the debugging windows to help you test in Visual Studio. Use Debug and Trace to get debugging information after an application is deployed. Use Try-Catch blocks to handle exceptions in your applications. Use the built-in Exception classes for standard error handling. Use custom build Exception classes to provide your own error handling. Create code to throw exception errors when non .NET errors are encountered.
Copyright © OnBarcode.com . All rights reserved.