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This article mainly introduces "how to establish and maintain ADO.NET database". In daily operation, I believe many people have doubts about how to establish and maintain ADO.NET database. The editor consulted all kinds of materials and sorted out simple and easy-to-use operation methods. I hope it will be helpful to answer the doubts about "how to establish and maintain ADO.NET database". Next, please follow the editor to study!

The data access objects of ADO.NET are as follows:

1. Connection object: establish a connection with the data source, connect to sql server7.0 or newer database using SqlConnection, and connect to OLEDB data source using OledbConnection.

2. Command object: execute the SQL command against the data source and return the result. SQL Server7.0 or newer version uses SqlCommand,OLE DB data source using OledbCommand.

3. DataReader object: read the data from the data source. You can only read the data from the data source from beginning to end. Sql server7.0 or above uses SqlDataReader,Oledb data source and OledbReader.

4. DataAdapter object: perform operations on the data source and return results, establish communication between the DataSet and the data source, write the data in the data source to DataSet, or must the data source according to the data in DataSet. Sql server7.0 or above uses SqlDataAdapter,Oledb data sources using OledbAdpater.

5. DataSet object: the database in the server memory

6. DataView object: used to display data in DataSet

Another way to read records from a database is to use Dataset objects and Dataadapter objects. Dataset is one of the main components of ADO.NET and is used to cache data information retrieved from data sources. Dataadapter acts as a bridge between the Dataset and the data source to retrieve and save data. Dataadapter uses the Fill method to populate the data into the Dataset after fetching the ADO.NET database from the database. Let's take Sqldataadapter as an example to show how to use Dataset objects and Dataadapter objects to read records from a database. The key steps to execute the query are as follows:

1. Create a Sqlconnection to establish a connection with the database and pass the connection string.

2. Construct the Sqldataadapter object containing the query statement

3. To populate the Dataset object with query results, call the command Fill method.

C # basic steps of database development using ado.net:

1. Create a connection object that connects to the ADO.NET database.

2. Configure the DataAdapter object and create and manipulate the dataset DataSet.

3. Add the tables in the database to DataSet.

4. Bind the dataset DataSet to DataGrid. The Fill method of DataAdapter is used to populate the data into DataSet, and the data in the final ADO.NET database is displayed in the DataGrid of the user interface.

At this point, the study on "how to establish and maintain the ADO.NET database" 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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