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IDataAdapter Interface

Allows an object to implement a DataAdapter, and represents a set of methods and mapping action-related properties used to fill and refresh a DataSet and update a data source.

Namespace: System.Data
Assembly: System.Data (in system.data.dll)

public interface IDataAdapter
public interface IDataAdapter
public interface IDataAdapter

The IDataAdapter interface allows an inheriting class to implement a DataAdapter class, which represents the bridge between a data source and a DataSet. For more information about DataAdapter classes, see Populating a DataSet from a DataAdapter. For more information about implementing .NET Framework data providers, see Implementing a .NET Framework Data Provider.

An application does not create an instance of the IDbDataAdapter interface directly, but implements an instance of a class that inherits IDbDataAdapter.

Classes that inherit IDataAdapter must implement the inherited members, and typically define additional members to add provider-specific functionality. For example, the IDataAdapter interface defines a Fill method that takes a DataSet as a parameter. In turn, the OleDbDataAdapter class inherits the Fill method, and also defines two additional overloads of the Fill method that take an ADO Recordset object as a parameter.

Notes to Implementers To promote consistency among .NET Framework data providers, name the inheriting class in the form Prv DataAdapter where Prv is the uniform prefix given to all classes in a specific .NET Framework data provider namespace. For example, Sql is the prefix of the SqlDataAdapter class in the System.Data.SqlClient namespace. When you inherit from the IDataAdapter interface, you should implement the following constructors:

Item

Description

PrvDataAdapter()

Initializes a new instance of the PrvDataAdapter class.

PrvDataAdapter(PrvCommand selectCommand)

Initializes a new instance of the PrvDataAdapter class with the specified SQL SELECT statement.

PrvDataAdapter(string selectCommandText, string selectConnectionString)

Initializes a new instance of the PrvDataAdapter class with an SQL SELECT statement and a connection string.

PrvDataAdapter(string selectCommandText, PrvConnection selectConnection)

Initializes a new instance of the PrvDataAdapter class with an SQL SELECT statement and a PrvConnection object.

The following example uses the derived classes, SqlCommand, SqlDataAdapter and SqlConnection, to select records from a database. The filled DataSet is then returned. To accomplish this, the method is passed an initialized DataSet, a connection string, and a query string that is a Transact-SQL SELECT statement.

private static DataSet SelectRows(DataSet dataset,
    string connectionString,string queryString) 
{
    using (SqlConnection connection = 
        new SqlConnection(connectionString))
    {
        SqlDataAdapter adapter = new SqlDataAdapter();
        adapter.SelectCommand = new SqlCommand(
            queryString, connection);
        adapter.Fill(dataset);
        return dataset;
    



Windows 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see System Requirements.

.NET Framework

Supported in: 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 2.0, 1.0

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