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It is believed that many inexperienced people have no idea about how to analyze the technology of ADO.NET accessing database. Therefore, this paper summarizes the causes and solutions of the problem. Through this article, I hope you can solve this problem.

This paper focuses on the steps of ADO.NET access to the database. Before introducing the ADO.NET access database technology, we should first understand what is the ADO.NET access database technology and what are the attentive problems of ADO.NET access to the database.

ADO.NET is significantly different from ADO in terms of syntax, style and design goals. To access a database through ADO in ASP, you usually go through the following four steps:

1. Create a link to the database, namely ADO.Connection

2. Query a data set, that is, execute SQL to generate a Recordset

3. Perform the required operations on the data set

4. Close the data link.

These steps have changed a lot in ADO.NET. One of the most important concepts of ADO.NET is DataSet. A DataSet is an independent collection of data that does not depend on the database. The so-called independence means that DataSet is still available even if the data link is disconnected or the database is shut down. If you have ever used a disconnected record set (Connectionless Recordset) in ASP, then DataSet is the most thorough alternative to this technology.

With DataSet, the steps for ADO.NET to access the database change accordingly:

1. Create a database link

2. Request a set of records

3. Temporarily save the record collection to DataSet

4. Return to step 2 if necessary; (DataSet can accommodate multiple data sets)

5. Close the database link

6. Do the required operations on DataSet.

DataSet internally uses XML to describe data. Because XML is a platform-independent and language-independent data description language, and can describe data with complex data relationships, such as parent-child relationship data, DataSet can actually accommodate data with complex relationships and is no longer dependent on database links.

ADO.NET accesses the database with many objects. Let's first look at the most basic and most commonly used ones. First, take a look at ADOConnection. Corresponding to the ADODB.Connection object of ADO, ADOConnection maintains a link to the database. To use the ADO.NET object, we need to introduce two NameSpace:System.Data and System.Data.ADO, using the Import instruction of ASP.NET:

After reading the above, have you mastered the method of technical analysis of how to access the database by ADO.NET? If you want to learn more skills or want to know more about it, you are welcome to follow the industry information channel, thank you for reading!

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