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This article mainly introduces "how to create ADO.NET SqlDataAdapter objects". In daily operation, I believe many people have doubts about how to create ADO.NET SqlDataAdapter objects. 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 create ADO.NET SqlDataAdapter objects". Next, please follow the editor to study!

ADO.NET can process data through DataSet,DataTable objects when it is disconnected from the database, reconnect to the data source when it needs to be updated, and update the data source. The DataTable object represents a table stored in native memory, and it provides various operations on the row and column data objects in the table. You can populate data directly from the database into DataTable objects, or you can add DataTable objects to existing DataSet objects. In the way of disconnection, DataSet objects provide the same relational data model as relational databases. DataTable objects in DataSet objects can be accessed directly in the code, and DataTable objects can be added or deleted.

ADO.NET SqlDataAdapter object

The SqlDataAdapter object completes the interaction between the database and the local DataSet in a connectionless way. The general steps to manipulate the database in this way are:

1. Create an instance of SqlConnection

two。 Create an instance of SqlDataAdapter and, if necessary, generate other SQL statements according to the select statement

3. Create an instance of DataSet

4. Use the Fill method to populate the tables in the database into the tables in DataSet

5. Edit or display data using DataGridView or other control objects

6. Use the Update method to update the database if necessary.

The ADO.NET SqlDataAdapter object provides the corresponding operation commands to the background database through the SelectCommand, InsertCommand, UpdateCommand, and DeleteCommand properties, and passes the required parameters. In general, you only need to provide a SELECT statement and a connection string to create a SqlDataAdapter object, and then use the SqlCommandBuilder object to generate InsertCommand, UpdateCommand, and DeleteCommand properties.

DataSet object

1. Create a DataSet object

Various data operations can be accomplished using the created DataSet object, and the database data source generated by the wizard is a strongly typed DataSet and a combination of one or more pairs of strongly typed DataTable and TableAdapter. Typed DataSet is a generated class that is derived from the generic DataSet class of the .NET Framework, but provides a defined schema as well as properties and methods specific to that schema. At the same time, for each table in the DataSet, additional derived classes specific to that DataSet are generated, and each class provides specific schemas, properties, and methods for the related tables.

Of course, you can also create generic DataSet objects directly, such as:

DataSet myDataset = new DataSet ()

two。 Populate DataSet object

After you create the DataSet, you can use the SqlDataAdapter object to import the data into the DataSet object, such as populating the data into a table in the DataSet through the Fill method.

At this point, the study on "how to create ADO.NET SqlDataAdapter objects" 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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