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This article mainly explains "how to connect ADO.NET data sources", the content of the explanation is simple and clear, easy to learn and understand, now please follow the editor's ideas slowly in depth, together to study and learn how to connect ADO.NET data sources!

ADO.NET data source is an efficient. Net programming language. It is a mixture of functional language and object-oriented programming language, and is suitable for programming, algorithm, technology and exploratory development, so you can feel interesting and attractive in the process of using it.

A typical step to access data using an ADO.NET data source in the actual programming process is:

(1) connect data sources

(2) Open Recordset object

(3) use recordset

(4) disconnect

So how exactly is it used? ADO.NET data sources are viewed separately. I will give you a complete example of using ADO for your reference.

(1) how to connect data sources

You can create a connection to a data source using the Connection object. The applied method is the Open method of the Connection object.

Syntax:

Connection object. Open ConnectionString, UserID, PassWord, OpenOptions

Where:

Connection object is an instance of the Connection object that you define.

ConnectionString is optional and contains information about the connected database; UserID is optional and ADO.NET data source contains the user name for establishing the connection; PassWord is optional and contains the user password for establishing the connection; OpenOptions is optional. If set to adConnectAsync, the connection will be opened asynchronously.

(2) Open Recordset object

In fact, the recordset returns a query result set retrieved from the ADO.NET data source library. So he has two ways to open it: one using the recordset's Open method and the other using the Connection object's Execute method.

Thank you for your reading, the above is the content of "how to connect ADO.NET data sources", after the study of this article, I believe you have a deeper understanding of how to connect ADO.NET data sources, and the specific use needs to be verified in practice. Here is, the editor will push for you more related knowledge points of the article, welcome to follow!

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