dotConnect for FreshBooks Documentation
Devart.Common Namespace / DbCommandBase Class
Members Example

DbCommandBase Class
Represents a SQL statement or stored procedure to execute against a data source.
Syntax
'Declaration
 
Public MustInherit Class DbCommandBase 
   Inherits System.Data.Common.DbCommand
   Implements System.ComponentModel.IComponentSystem.Data.IDbCommandSystem.IDisposable 
 
Remarks
Abstract DbCommandBase class implements some of DbCommandBase functionality that is data source-independent.
Example
The following sample demonstrates how using base classes helps to create data source-independent code.
public void PrintDept(DbConnectionBase myConnection) {
        DbCommandBase myCommand = (DbCommandBase)myConnection.CreateCommand();
        myCommand.CommandText = "SELECT Id, FirstName, LastName FROM Client";
        myConnection.Open();
        DbDataReader myReader = myCommand.ExecuteReader();
        try {
                while (myReader.Read()) {
                        Console.WriteLine(myReader.GetString(0) + " " + 
                                myReader.GetString(1) + " " + myReader.GetString(2));
                }
        }
        finally {
                myReader.Close();
                myConnection.Close();
        }
}
Public Sub PrintDept(ByVal myConnection As DbConnectionBase)
        Dim myCommand As DbCommandBase = myConnection.CreateCommand()
        myCommand.CommandText = "SELECT Id, FirstName, LastName FROM Client"
        myConnection.Open()
        Dim myReader As DbDataReader = myCommand.ExecuteReader()
        Try
                While myReader.Read()
                        Console.WriteLine(String.Concat(myReader.GetString(0), " ", _
                                myReader.GetString(1), " ", myReader.GetString(2)))
                End While
        Finally
                myReader.Close()
                myConnection.Close()
        End Try
End Sub
Inheritance Hierarchy

System.Object
   System.MarshalByRefObject
      System.ComponentModel.Component
         System.Data.Common.DbCommand
            Devart.Common.DbCommandBase
               Devart.Data.SqlShimCommand

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