dotConnect for SQLite Documentation
Devart.Data.SQLite Namespace / SQLiteCommand Class
Members Example

In This Topic
    SQLiteCommand Class
    In This Topic
    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.
    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