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Devart.Data.SQLite Namespace / SQLiteCommand Class
Members Example

SQLiteCommand Class
Represents a SQL statement to execute against SQLite.
Syntax
Remarks
The SQLiteCommand class provides the following methods for executing commands against the SQLite database:
Item Description
ExecuteReader Executes commands that return rows.
Devart.Common.DbCommandBase.ExecutePageReader Returns a specific subset of rows when paging through the results of a query.
ExecuteNonQuery Executes SQL commands such as INSERT, DELETE, UPDATE.
ExecuteScalar Retrieves a single value (for example, an aggregate value) from a data source.

If execution of the command results in a fatal SQLiteException, the SQLiteConnection may close. However, the user can reopen the connection and continue.

This class supports cross-form data binding with the InterForm Technology.

Example
The following example uses the ExecuteReader method of SQLiteCommand, along with SQLiteDataReader and SQLiteConnection, to select rows from a table.
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();
  SQLiteDataReader sqReader = sqCommand.ExecuteReader();
  try
  {
    while (sqReader.Read())
    {
      Console.WriteLine(sqReader.GetInt32(0).ToString() + ", " + sqReader.GetString(1));
    }
  }
  finally
  {
  // always call Close when done reading.
  sqReader.Close();
  // always call Close when done reading.
  sqConnection.Close();
  }
}
Public Sub ReadMyData(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()
  Dim sqReader As SQLiteDataReader = sqCommand.ExecuteReader()
  Try
    While sqReader.Read()
      Console.WriteLine(sqReader.GetInt32(0).ToString() + ", " _
        + sqReader.GetString(1))
    End While
  Finally
      ' always call Close when done reading.
      sqReader.Close()
      ' always call Close when done with connection.
      sqConnection.Close()
  End Try
End Sub
Inheritance Hierarchy

System.Object
   System.MarshalByRefObject
      System.ComponentModel.Component
         System.Data.Common.DbCommand
            Devart.Common.DbCommandBase
               Devart.Data.SQLite.SQLiteCommand

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

See Also