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This article focuses on "what are the steps of ADO.Net programming". Interested friends may wish to take a look. The method introduced in this paper is simple, fast and practical. Let's let the editor take you to learn what are the steps of ADO.Net programming.

So you should enter a statement related to ADO.Net technology, and of course, the system can automatically generate this statement by clicking the "query Builder" button. It is important to note that the standard select statement is entered in ADO.Net technology. In this case, we will return the columns id and d from the table Table1.

ActiveX Data Object (ADO for short) is a data access model provided by Microsoft. According to this model, the database can be easily operated. At the same time, ADO is supported by all the development tools of Microsoft, so it can be used by VB, VC and ASP development. So develop ASP database application.

By embedding SQL (structured query language) commands in the code, users can easily enter, update, and delete background database records. When the browser of the client fills out the information required by the form and presses the "Submit" button, it sends the HTTP request to the WEB server through the Internet and the intranet, where the request executes an Active Server Pages program specified in the form (a document with the suffix .ASP).

In the past, the main method of data processing in ADO was OLEDB, and now it is the same in ADO.Net technology. However, in order to better support the two widely used databases, Oracle and SQL Server, Microsoft has made special extensions to OLEDB, which are OracleClient and SQLClient respectively. Of course, because there are many database products, in order to facilitate the previous OLEDB program upgrade, OLEDB itself has also been upgraded. Represented as an OLEDB class in .net.

So what is the difference between the three classes-- OLEDB, OracleClient, and SQLClient-- in programming use? Fortunately, when programming a database in .net, no matter which of the three classes mentioned above, the three classes are more or less the same in syntax and usage, which can be described as one-size-fits-all.

After learning and using ADO.Net technology, the author summarizes the following three necessary steps, and the order of these three steps can never be changed. If you find that the order of the three steps is changed or missing in later programming, then your code must be wrong:

1. Use the connection method in the corresponding class to connect to the database. If you use the SQLClient class, then use SqlConnection1 to establish a link to the database.

two。 Open this link.

3. Execute the command method in the corresponding class to specify the SQL statement to execute. If you use the SQLClient class, use SqlCommand to execute the specified SQL statement.

The two examples below are code that uses ADO.Net technology in .net. Because SQL Server is easier to use than Oracle, the database here uses Microsoft's SQL Server 2000. The reason is that it can be used directly without configuration after installation. Since you are accessing SQL Server, the class you use is, of course, the SQLClient class. These two examples are:

1. Add, delete, and modify data in the database.

two。 Use ADO technology to establish a database of SQL Server 2000. Start SQL Server2000, and then set up a database and a table, and there must be a primary key in the table. ADO.Net technology can enter some data casually. Save this table when you are finished.

The table structure used in this article is as follows:

Id column int type flag column primary key dliechar type here, I believe that we have a deeper understanding of "what are the steps of ADO.Net programming", you might as well to actually operate it! Here is the website, more related content can enter the relevant channels to inquire, follow us, continue to learn!

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