mcs/class/referencesource/System.Data/System/Data/DataColumnChangeEvent.cs

   1 //------------------------------------------------------------------------------
   2 // <copyright file="DataColumnChangeEvent.cs" company="Microsoft">
   3 //     Copyright (c) Microsoft Corporation.  All rights reserved.
   4 // </copyright>
   5 // <owner current="true" primary="true">Microsoft</owner>
   6 // <owner current="true" primary="false">Microsoft</owner>
   7 // <owner current="false" primary="false">Microsoft</owner>
   8 //------------------------------------------------------------------------------
   9
  10 namespace System.Data {
  11     using System;
  12
  13     /// <devdoc>
  14     ///    <para>
  15     ///       Provides data for the <see cref='System.Data.DataTable.ColumnChanging'/> event.
  16     ///    </para>
  17     /// </devdoc>
  18     public class DataColumnChangeEventArgs : EventArgs {
  19
  20         private readonly DataRow _row;
  21         private DataColumn _column;
  22         private object _proposedValue;
  23
  24         internal DataColumnChangeEventArgs(DataRow row) {
  25             _row = row;
  26         }
  27
  28         /// <devdoc>
  29         ///    <para>
  30         ///       Initializes a new instance of the <see cref='System.Data.DataColumnChangeEventArgs'/> class.
  31         ///    </para>
  32         /// </devdoc>
  33         public DataColumnChangeEventArgs(DataRow row, DataColumn column, object value) {
  34             _row = row;
  35             _column = column;
  36             _proposedValue = value;
  37         }
  38
  39         /// <devdoc>
  40         ///    <para>Gets the column whose value is changing.</para>
  41         /// </devdoc>
  42         public DataColumn Column {
  43             get {
  44                 return _column;
  45             }
  46         }
  47
  48         /// <devdoc>
  49         ///    <para>Gets the row whose value is changing.</para>
  50         /// </devdoc>
  51         public DataRow Row {
  52             get {
  53                 return _row;
  54             }
  55         }
  56
  57         /// <devdoc>
  58         ///    <para>Gets or sets the proposed value.</para>
  59         /// </devdoc>
  60         public object ProposedValue {
  61             get {
  62                 return _proposedValue;
  63             }
  64             set {
  65                 _proposedValue = value;
  66             }
  67         }
  68
  69         internal void InitializeColumnChangeEvent(DataColumn column, object value) {
  70             _column = column;
  71             _proposedValue = value;
  72         }
  73     }
  74 }