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This article mainly introduces "what are the operation steps of the ADO.NET object". In the daily operation, I believe that many people have doubts about what the operation steps of the ADO.NET object are. The editor consulted all kinds of materials and sorted out simple and easy-to-use operation methods. I hope it will be helpful for you to answer the doubts about "what are the operation steps of the ADO.NET object?" Next, please follow the editor to study!

ADO.NET object is very good for speed, if you want to modify the operation skills, a better way is to use the DataSet,.Net platform program is a common class of ADO.NET objects, the following details on the use of ADO.NET objects.

So DataSet class has a special position in ADO.NET because DataSet plays a key role in extracting data from database in ADO.NET. After data extraction from database, DataSet is the storage place of data. It is the cache of data from various data sources mapped in computer memory, so sometimes DataSet can be regarded as a data container. At the same time, it acts as an intermediate component in the process of reading and updating the database on the client side (DataReader can only retrieve the data in the database).

Various .net platform development languages to develop database applications generally do not directly operate on the database (except for calling stored procedures directly in the program, etc.), but first complete the data connection and populate the DataSet object through the data adapter, and then the client obtains the required data by reading DataSet, and also updates the data in the database first by updating the ADO.NET object. Then update the corresponding data in the database through DataSet. It can be seen that to understand and master ADO.NET, we must first understand and master DataSet. DataSet has three main features:

1. Independence. DataSet is independent of various data sources. When Microsoft launched DataSet, it considered the diversity and complexity of various data sources. In .net, regardless of the type of data source, it provides a consistent relational programming model, and this is DataSet.

two。 Offline (disconnected) and connected. ADO.NET objects can manipulate data in the database either offline or with real-time connections. This is a bit like RecordSet in ADO.

3. The DataSet object is a data view that can be represented in the form of XML, and it is a data relational view.

I. the structure model of dataset object and its comparison with RecordSet

Although ADO.NET is the successor to ADO on the .net platform, there is a big difference between the two. The RecordSet object in ADO and the DataSet object in ADO.NET are highlighted. In fact, RecordSet is also a very flexible object, Microsoft launched it is also painstaking, such as: RecordSet can operate databases offline, good performance, high efficiency and so on all cheered programmers at that time.

Although RecordSet is already very complex, ADO.NET objects are much more complex than RecordSet. We know that each DataSet is often a collection of one or more DataTable objects, which are composed of data rows and columns, as well as primary keys, foreign keys, constraints, and relational information about the data in DataTable objects. RecordSet can only hold a single data table, although this data table can be generated by several data tables JOIN. So sometimes it is said that RecordSet is more like DataTable in DataSet. The structural model of the DataSet object.

At this point, the study on "what is the operation procedure of ADO.NET object" is over. I hope to be able to solve your doubts. The collocation of theory and practice can better help you learn, go and try it! If you want to continue to learn more related knowledge, please continue to follow the website, the editor will continue to work hard to bring you more practical articles!

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