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This article introduces you how to analyze the application of ASP.NET trace in the implementation of the page, the content is very detailed, interested friends can refer to, hope to help you.

What is the use of ASP.NET trace and trace attributes to record the execution of web pages in the Page directory? Let's take a look:

An ancient technique for debugging programs is to insert output statements at key points in the program. usually, the output information contains the values of important variables, and the relevant information can be output to the screen, log file, or database.

How to use ASP.NET trace? This debugging technique is easier to use by using the trace attribute in the Page command. The Page command is a line of code at the beginning of the ASPX file that provides instructions from the compiler. The Page command contains one or more attributes that provide the compiler with information such as the programming language used, the location of the code support file, or the name of the class to inherit.

One of the attributes in the Page command is trace, whose value may be true or false. Here is a typical Page command, where the value of the trace attribute is true:

If the value of the trace property is set to true, the Web page generated by the ASPX file will be displayed, and a great deal of other information about the page will be displayed in addition to the page itself. This information is displayed in a table in the form of the following sections:

The ◆ Request details provide the Session ID, the request time, and the request status code.

◆ Trace Information contains tracking logs and a list of steps in chronological order in the life cycle of a web page. Alternatively, you can add custom information to it.

The ◆ control tree lists all controls on a web page in a hierarchical manner, including the size of each control in bytes.

The ◆ Cookies collection lists all the Cookie created by this page.

◆ headers collect HTTP headers and their values.

◆ Server variable the Server environment variable associated with the page.

It is most useful for ASP.NET trace applications to have trace logs included in the Trace Information section, where we can insert our own trace commands. There are two methods in the trace class that can insert commands into the trace log: Trace.Write and Trace.Warn, which are the same except that the Trace.Warn command is displayed in red font and the Trace.Write command is displayed in black font. The following is a screenshot of the trace log with several Trace.Warn commands.

The most convenient feature in the trace log is that we can insert Trace.Write and Trace.Warn statements throughout the code during development and testing, and when the application is finally delivered, we can disable these commands from working by changing the value of the trace attribute in the Page command, without having to delete these output statements before deploying the application.

On how to analyze the application of ASP.NET trace in the page execution is shared here, I hope that the above content can be of some help to you, can learn more knowledge. If you think the article is good, you can share it for more people to see.

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