#Visual studio ms sql data entry update

It consists of the DataRow and DataColumn objects. It represents a table in the DataTableCollection of a dataset. It contains additional information, like the SQL statement for retrieving data, time of retrieval, etc. It contains relationships and the links between tables in a data set.

It contains all the tables retrieved from the data source. The following table describes all the components of DataSet − The DataSet class is present in the System.Data namespace. The following diagram shows the dataset object model − The dataset works as a virtual database containing tables, rows, and columns. This is called the 'disconnected architecture'.

After the data is retrieved and stored in a dataset, the connection with the database is closed. When a connection is established with the database, the data adapter creates a dataset and stores data in it. It is a disconnected, cached set of records that are retrieved from a database. The Entit圜lient provider - enables accessing data through Entity Data Model (EDM) applications.ĭataSet is an in-memory representation of data. Net Framework data provider for Oracle - provides access to Oracle data source. Net Framework data provider for ODBC - provides access to data sources exposed by ODBC. Net Framework data provider for OLE DB - provides access to data sources exposed by using OLE DB. Net Framework data provider for SQL Server - provides access to Microsoft SQL Server.

There are following different types of data providers included in ADO.Net When changes are made to the dataset, the changes in the database are actually done by the data adapter. It retrieves data from a database into a dataset and updates the database. This is integral to the working of ADO.Net since data is transferred to and from a database through a data adapter. This component is used to set up a connection with a data source.Ī command is a SQL statement or a stored procedure used to retrieve, insert, delete or modify data in a data source.ĭata reader is used to retrieve data from a data source in a read-only and forward-only mode. The data provider in ADO.Net consists of the following four objects −

#Visual studio ms sql data entry update

Various components of the data provider retrieve data for the application and update data.Īn application accesses data either through a dataset or a data reader.ĭatasets store data in a disconnected cache and the application retrieves data from it.ĭata readers provide data to the application in a read-only and forward-only mode.Ī data provider is used for connecting to a database, executing commands and retrieving data, storing it in a dataset, reading the retrieved data and updating the database. The data residing in a data store or database is retrieved through the data provider. The object model can be pictorially described as − ADO.Net Object ModelĪDO.Net object model is nothing but the structured process flow through various components. Net applications for retrieving, accessing and updating data. Microsoft ActiveX Data Objects.Net (ADO.Net) is a model, a part of the. Applications communicate with a database, firstly, to retrieve the data stored there and present it in a user-friendly way, and secondly, to update the database by inserting, modifying and deleting data.