MagentoDataReader Class

In This Topic

Reads a forward-only stream of rows from Magento.

Syntax

Visual Basic
C#

'Declaration
 
Public NotInheritable Class MagentoDataReader 
   Inherits Devart.Data.SqlShimDataReader
   Implements System.Collections.IEnumerable, System.Data.IDataReader, System.Data.IDataRecord, System.IDisposable

public sealed class MagentoDataReader : Devart.Data.SqlShimDataReader, System.Collections.IEnumerable, System.Data.IDataReader, System.Data.IDataRecord, System.IDisposable

Remarks

To create a MagentoDataReader, you must call the ExecuteReader method of the MagentoCommand object, rather than directly using a constructor.

System.Data.Common.DbDataReader.IsClosed and RecordsAffected are the only properties that you can call after the MagentoDataReader is closed. In some cases, you must call Close before you can call RecordsAffected.

Example

The following example creates a MagentoConnection, a MagentoCommand, and a MagentoDataReader. The example reads through the data, writing it out to the console. Finally, the example closes the MagentoDataReader, then the MagentoConnection.

csharp

public void ReadMyData(string myConnString)  {
        MagentoConnection magentoConnection = new MagentoConnection(myConnString);
        MagentoCommand magentoCommand = (MagentoCommand)magentoConnection.CreateCommand();
        magentoCommand.CommandText = "SELECT customer_id, firstname, lastname FROM Customers";
        magentoConnection.Open();
        MagentoDataReader magentoReader = magentoCommand.ExecuteReader();
        try {
                // Always call Read before accessing data.
                while (magentoReader.Read()) {
                Console.WriteLine(magentoReader.GetInt32(0).ToString() + " " + 
                magentoReader.GetString(1) + " " + magentoReader.GetString(2));
        }
        }
        finally {
                // always call Close when done reading.
                magentoReader.Close();

                // Close the connection when done with it.
                magentoConnection.Close();
        }
}

Visual Basic

Public Sub ReadMyData(ByVal myConnString As String)
        Dim magentoConnection As New MagentoConnection(myConnString)
        Dim magentoCommand As MagentoCommand = magentoConnection.CreateCommand()
                magentoCommand.CommandText = "SELECT customer_id, firstname, lastname FROM Customers"
        magentoConnection.Open()
        Dim magentoReader As MagentoDataReader = magentoCommand.ExecuteReader()
        Try
                ' Always call Read before accessing data.
                While magentoReader.Read()
                        Console.WriteLine(String.Concat(magentoReader.GetInt32(0).ToString(), " ", _
                        magentoReader.GetString(1), " ", magentoReader.GetString(2)))
                End While
        Finally
                ' always call Close when done reading.
                magentoReader.Close()

                        ' Close the connection when done with it.
                        magentoConnection.Close()
        End Try
End Sub

Inheritance Hierarchy

System.Object
   System.MarshalByRefObject
      System.Data.Common.DbDataReader
         Devart.Common.DbDataReaderBase
            Devart.Data.SqlShimDataReader
               Devart.Data.Magento.MagentoDataReader

Requirements

Target Platforms: Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

Reference

MagentoDataReader Members
Devart.Data.Magento Namespace
MagentoConnection Class
MagentoCommand Class

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