class/System.Data.DataSetExtensions/System.Data/TypedTableBase.cs

   1 //
   2 // TypedTableBase.cs
   3 //
   4 // Author:
   5 //   Atsushi Enomoto  <atsushi@ximian.com>
   6 //
   7 // Copyright (C) 2008 Novell, Inc. http://www.novell.com
   8 //
   9
  10 //
  11 // Permission is hereby granted, free of charge, to any person obtaining
  12 // a copy of this software and associated documentation files (the
  13 // "Software"), to deal in the Software without restriction, including
  14 // without limitation the rights to use, copy, modify, merge, publish,
  15 // distribute, sublicense, and/or sell copies of the Software, and to
  16 // permit persons to whom the Software is furnished to do so, subject to
  17 // the following conditions:
  18 //
  19 // The above copyright notice and this permission notice shall be
  20 // included in all copies or substantial portions of the Software.
  21 //
  22 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  23 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  24 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  25 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  26 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  27 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  28 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  29 //
  30
  31 using System;
  32 using System.Collections;
  33 using System.Collections.Generic;
  34 using System.Linq;
  35 using System.Runtime.Serialization;
  36
  37 namespace System.Data
  38 {
  39         [Serializable]
  40         public abstract class TypedTableBase<T> : DataTable, IEnumerable<T>, IEnumerable
  41                 where T : DataRow
  42         {
  43                 protected TypedTableBase ()
  44                 {
  45                 }
  46
  47                 protected TypedTableBase (SerializationInfo info, StreamingContext context)
  48                         : base (info, context)
  49                 {
  50                 }
  51
  52                 public EnumerableRowCollection<TResult> Cast<TResult> ()
  53                 {
  54                         return new EnumerableRowCollection<TResult> (Enumerable.Cast<TResult> (this));
  55                 }
  56
  57                 public IEnumerator<T> GetEnumerator ()
  58                 {
  59                         foreach (object o in Rows)
  60                                 yield return (T) o;
  61                 }
  62
  63                 IEnumerator IEnumerable.GetEnumerator ()
  64                 {
  65                         return GetEnumerator ();
  66                 }
  67         }
  68 }