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This article is to share with you what the skills in ASP.NET programming are, the editor thinks it is very practical, so I share it with you to learn. I hope you can get something after reading this article. Let's take a look at it with the editor.

This paper introduces a skill that programmers should pay attention to when programming in ASP.NET.

The difference between HyperLink Control and LinkButton Control

For Web visitors, HyperLink and LinkButton controls are the same, but they are still quite different in terms of functionality.

When the user clicks on the control, the HyperLink control immediately "navigates" the user to the target URL, and the watch is not sent back to the server. The LinkButton control first sends the watch back to the server, and then navigates the user to the target URL. Use the LinkButton control if server-side processing is required before reaching the target URL; if server-side processing is not required, you can use the HyperLink control.

Comment code

This technique is not aimed at asp.net programming, but it is a good programming habit.

Comments should indicate not only what the code will do, but also why. For example, don't just state in the comments that you are traversing the array, but that the traversal array calculates a value based on an algorithm, and unless the algorithm is fairly simple, you should also briefly explain the algorithm.

Different programming languages in the .net project have their own annotation symbols. Here is a brief description:

HTML JavaScript / / comment VBScript 'comment VB.net' comment C # / comment / * comment on multiple lines * / SQL-comment

There are no comment symbols in the opening and closing tags of the server control, but the server can ignore all attributes it does not recognize, so we can insert comments by using undefined properties. Here is an example:

Commenting on the source code in Visual Studio. Net is very simple. Highlight the lines that need to be commented, and then press Ctrl+K+C to add comments. To delete a comment, simply highlight the commented code and press Ctrl+K+U.

In a C# project, we can also use the / input XML comment section at the beginning of each line. In the comments section, we can organize comments using the following XML tags:

To view formatted reports of these XML comments in Visual Studio. Net, we can first select the tools menu item, and then select the create annotated Web Page menu item.

Use the trace method and the trace property to record the execution of web pages in the Page directory

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.

In asp.net, 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 the 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 set HTTP headers and their values.

The Server variable is the Server environment variable associated with the page.

The trace logs included in the Trace Information section are the most useful, 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.

Using stored procedures

Microsoft's SQL Server and other modern relational databases use SQL commands to define and process queries. A SQL statement or a series of SQL statements submitted to SQL Server,SQL Server parses the command, creates a query plan, optimizes it, and then executes the query plan, which takes a lot of time.

Stored procedures are a series of SQL commands that are pre-parsed and optimized by the query processor. These commands are stored and can be executed quickly. A stored procedure, also known as sprocs, can receive input parameters, enabling a single stored procedure to handle a wide range of specific queries.

Because sprocs is parsed in advance, it is more important for complex queries, and its query plan is pre-optimized, so calling the query process is much faster than SQL statements that perform the same function.

Use the .net command line

The. Net command line tool runs in a command prompt window. In order for a command to execute, it must reside in the current directory at the command prompt, or by setting the PATH environment variable.

Net SDK installs a menu item on the launch menu that opens a command prompt window with the PATH environment variable set correctly. We can start the command prompt window by clicking start-> programs-> Microsoft Visual Studio .net tools-> Visual Studio .net Command prompt.

By pressing Ctrl+ C while dragging the menu item from the menu to the desktop, you can copy the shortcut of the menu item to the desktop, which is very convenient to use.

These are the skills in ASP.NET programming, and the editor believes that there are some knowledge points that we may see or use in our daily work. I hope you can learn more from this article. For more details, please follow the industry information channel.

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