SqlDataAdapter Class

Definition

public ref class SqlDataAdapter sealed : System::Data::Common::DbDataAdapter, ICloneable, System::Data::IDbDataAdapter

public ref class SqlDataAdapter sealed : System::Data::Common::DbDataAdapter, ICloneable

public sealed class SqlDataAdapter : System.Data.Common.DbDataAdapter, ICloneable, System.Data.IDbDataAdapter

public sealed class SqlDataAdapter : System.Data.Common.DbDataAdapter, ICloneable

type SqlDataAdapter = class
    inherit DbDataAdapter
    interface IDbDataAdapter
    interface IDataAdapter
    interface ICloneable

Public NotInheritable Class SqlDataAdapter
Inherits DbDataAdapter
Implements ICloneable, IDbDataAdapter

Public NotInheritable Class SqlDataAdapter
Inherits DbDataAdapter
Implements ICloneable

Inheritance

Object

MarshalByRefObject

Component

DataAdapter

DbDataAdapter

SqlDataAdapter

Implements

IDataAdapter IDbDataAdapter ICloneable

Examples

The following example uses the SqlCommand, SqlDataAdapter, and SqlConnection to select records from a database and populate a DataSet with the selected rows. 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;
    }
}

Public Function SelectRows( _
    ByVal dataSet As DataSet, ByVal connectionString As String, _
    ByVal queryString As String) As DataSet

    Using connection As New SqlConnection(connectionString)
        Dim adapter As New SqlDataAdapter()
        adapter.SelectCommand = New SqlCommand( _
            queryString, connection)
        adapter.Fill(dataSet)
        Return dataSet
    End Using
End Function

Remarks

The SqlDataAdapter, serves as a bridge between a DataSet and SQL Server for retrieving and saving data. The SqlDataAdapter provides this bridge by mapping Fill, which changes the data in the DataSet to match the data in the data source, and Update, which changes the data in the data source to match the data in the DataSet, using the appropriate Transact-SQL statements against the data source. The update is performed on a by-row basis. For every inserted, modified, and deleted row, the Update method determines the type of change that has been performed on it (Insert, Update, or Delete). Depending on the type of change, the Insert, Update, or Delete command template executes to propagate the modified row to the data source. When the SqlDataAdapter fills a DataSet, it creates the necessary tables and columns for the returned data if they do not already exist. However, primary key information is not included in the implicitly created schema unless the MissingSchemaAction property is set to AddWithKey. You may also have the SqlDataAdapter create the schema of the DataSet, including primary key information, before filling it with data using FillSchema. For more information, see Adding Existing Constraints to a DataSet.

SqlDataAdapter is used in conjunction with SqlConnection and SqlCommand to increase performance when connecting to a SQL Server database.

The SqlDataAdapter also includes the SelectCommand, InsertCommand,