SQLiteDataReader Class

In This Topic

Reads a forward-only stream of rows from SQLite.

Syntax

Visual Basic
C#

'Declaration
 
Public Class SQLiteDataReader 
   Inherits Devart.Common.DbDataReaderBase
   Implements System.Collections.IEnumerable, System.Data.IDataReader, System.Data.IDataRecord, System.IDisposable

public class SQLiteDataReader : Devart.Common.DbDataReaderBase, System.Collections.IEnumerable, System.Data.IDataReader, System.Data.IDataRecord, System.IDisposable

Remarks

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

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

Example

The following example creates a SQLiteConnection, a SQLiteCommand, and a SQLiteDataReader. The example reads through the data, writing it out to the console. Finally, the example closes the SQLiteDataReader, then the SQLiteConnection.

csharp

public void ReadMyData(string myConnString)  {
        SQLiteConnection sqConnection = new SQLiteConnection(myConnString);
        SQLiteCommand sqCommand = (SQLiteCommand)sqConnection.CreateCommand();
        sqCommand.CommandText = "SELECT DeptNo, DName, Loc FROM Dept";
        sqConnection.Open();
        SQLiteDataReader sqReader = sqCommand.ExecuteReader();
        try {
                // Always call Read before accessing data.
                while (sqReader.Read()) {
                Console.WriteLine(sqReader.GetInt32(0).ToString() + " " + 
                sqReader.GetString(1) + " " + sqReader.GetString(2));
        }
        }
        finally {
                // always call Close when done reading.
                sqReader.Close();

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

Visual Basic

Public Sub ReadMyData(ByVal myConnString As String)
        Dim sqConnection As New SQLiteConnection(myConnString)
        Dim sqCommand As SQLiteCommand = sqConnection.CreateCommand()
                sqCommand.CommandText = "SELECT DeptNo, DName, Loc FROM Dept"
        sqConnection.Open()
        Dim sqReader As SQLiteDataReader = sqCommand.ExecuteReader()
        Try
                ' Always call Read before accessing data.
                While sqReader.Read()
                        Console.WriteLine(String.Concat(sqReader.GetInt32(0).ToString(), " ", _
                        sqReader.GetString(1), " ", sqReader.GetString(2)))
                End While
        Finally
                ' always call Close when done reading.
                sqReader.Close()

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

Inheritance Hierarchy

System.Object
   System.MarshalByRefObject
      System.Data.Common.DbDataReader
         Devart.Common.DbDataReaderBase
            Devart.Data.SQLite.SQLiteDataReader

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

SQLiteDataReader Members
Devart.Data.SQLite Namespace
SQLiteConnection Class
SQLiteCommand Class

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