See Also

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

Language

Visual Basic

C#

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SQLiteDataReader Class

Devart.Data.SQLite Namespace : SQLiteDataReader Class

Reads a forward-only stream of rows from a SQLite database.

For a list of all members of this type, see SQLiteDataReader members.

Inheritance Hierarchy

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

Syntax

[Visual Basic]
Public Class SQLiteDataReader    Inherits DbDataReaderBase
[C#]
public class SQLiteDataReader : DbDataReaderBase

Remarks

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

Devart.Common.DbDataReaderBase.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.

[C#] 

public void ReadMyData(string myConnString)  

  string mySelectQuery = "SELECT DeptNo, DName FROM Dept"; 
  SQLiteConnection sqConnection = new SQLiteConnection(myConnString); 
  SQLiteCommand sqCommand = new SQLiteCommand(mySelectQuery,sqConnection); 
  sqConnection.Open(); 
  try 
  { 
    SQLiteDataReader sqReader = sqCommand.ExecuteReader(); 
     
    // Always call Read before accessing data. 
    while (sqReader.Read())  
    { 
      Console.WriteLine(sqReader.GetInt32(0) + ", " + sqReader.GetString(sqReader.GetOrdinal("DName"))); 
    } 
 
    // always call Close when done reading. 
    sqReader.Close(); 
 
    // Close the connection when done with it. 
    } 
  finally 
  { 
    sqConnection.Close(); 
  } 

[Visual Basic] 

Public Sub ReadMyData(ByVal myConnString As String)
  Dim mySelectQuery As String = "SELECT DeptNo, DName FROM Dept"
  Dim sqConnection As New SQLiteConnection(myConnString)
  Dim sqCommand As New SQLiteCommand(mySelectQuery, sqConnection)
  sqConnection.Open()
  Try
    Dim sqReader As SQLiteDataReader = sqCommand.ExecuteReader()

    ' Always call Read before accessing data.
    While sqReader.Read()
      Console.WriteLine(sqReader.GetInt32(0).ToString() + ", " _
          + sqReader.GetString(sqReader.GetOrdinal("DName")))
    End While
    ' always call Close when done reading.
    sqReader.Close()

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

See Also

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

 

 


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