mcs/class/System.Web.DynamicData/System.Web.DynamicData/DynamicDataManager.cs

   1 //
   2 // DynamicDataManager.cs
   3 //
   4 // Author:
   5 //      Atsushi Enomoto <atsushi@ximian.com>
   6 //      Marek Habersack <mhabersack@novell.com>
   7 //
   8 // Copyright (C) 2008-2009 Novell Inc. http://novell.com
   9 //
  10
  11 //
  12 // Permission is hereby granted, free of charge, to any person obtaining
  13 // a copy of this software and associated documentation files (the
  14 // "Software"), to deal in the Software without restriction, including
  15 // without limitation the rights to use, copy, modify, merge, publish,
  16 // distribute, sublicense, and/or sell copies of the Software, and to
  17 // permit persons to whom the Software is furnished to do so, subject to
  18 // the following conditions:
  19 //
  20 // The above copyright notice and this permission notice shall be
  21 // included in all copies or substantial portions of the Software.
  22 //
  23 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  24 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  25 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  26 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  27 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  28 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  29 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  30 //
  31 using System;
  32 using System.Collections;
  33 using System.Collections.Generic;
  34 using System.Collections.Specialized;
  35 using System.ComponentModel;
  36 using System.Drawing;
  37 using System.Globalization;
  38 using System.Security.Permissions;
  39 using System.Security.Principal;
  40 using System.Web.Caching;
  41 using System.Web.UI;
  42 using System.Web.UI.WebControls;
  43 using System.Web.DynamicData.ModelProviders;
  44
  45 namespace System.Web.DynamicData
  46 {
  47         [ToolboxBitmap (typeof(DynamicDataManager), "DynamicDataManager.ico")]
  48         [AspNetHostingPermission (SecurityAction.InheritanceDemand, Level = AspNetHostingPermissionLevel.Minimal)]
  49         [AspNetHostingPermission (SecurityAction.LinkDemand, Level = AspNetHostingPermissionLevel.Minimal)]
  50         [NonVisualControl]
  51         [ParseChildren (true)]
  52         [PersistChildren (false)]
  53         public class DynamicDataManager : Control
  54         {
  55                 private class AutoFieldGenerator : IAutoFieldGenerator
  56                 {
  57                         MetaTable table;
  58
  59                         public AutoFieldGenerator (MetaTable table)
  60                         {
  61                                 this.table = table;
  62                         }
  63
  64                         public ICollection GenerateFields (Control ctl)
  65                         {
  66                                 var ret = new List <DynamicField> ();
  67                                 foreach (MetaColumn column in table.Columns) {
  68                                         if (!column.Scaffold)
  69                                                 continue;
  70
  71                                         var field = new DynamicField ();
  72                                         field.DataField = column.Name;
  73                                         ret.Add (field);
  74                                 }
  75
  76                                 return ret;
  77                         }
  78                 }
  79
  80                 Dictionary <IDynamicDataSource, bool> knownDataSources;
  81
  82                 public DynamicDataManager ()
  83                 {
  84                 }
  85
  86                 public bool AutoLoadForeignKeys {
  87                         get;
  88                         set;
  89                 }
  90
  91                 [Browsable (false)]
  92                 public override bool Visible {
  93                         get { return true; }
  94
  95                         // NOTE: it is supposed to throw the exception
  96                         set { throw new NotImplementedException (); }
  97                 }
  98
  99                 protected override void OnLoad (EventArgs e)
 100                 {
 101                         base.OnLoad (e);
 102
 103                         // http://forums.asp.net/p/1257004/2339034.aspx
 104                         // http://forums.asp.net/t/1297860.aspx
 105                         // http://forums.asp.net/p/1396453/3005197.aspx#3005197
 106                         if (knownDataSources != null) {
 107                                 foreach (var de in knownDataSources) {
 108                                         IDynamicDataSource dds = de.Key;
 109                                         if (dds == null)
 110                                                 continue;
 111
 112                                         dds.ExpandDynamicWhereParameters ();
 113                                 }
 114                         }
 115                 }
 116
 117                 public void RegisterControl (Control control)
 118                 {
 119                         RegisterControl (control, false);
 120                 }
 121
 122                 public void RegisterControl (Control control, bool setSelectionFromUrl)
 123                 {
 124                         // .NET doesn't check for null here, but since I don't like such code, we
 125                         // will do the check and throw the same exception as .NET
 126                         if (control == null)
 127                                 throw new NullReferenceException ();
 128
 129                         if (!ControlIsValid (control))
 130                                 throw new Exception ("Controls of type " + control.GetType () + " are not supported.");
 131
 132                         // http://forums.asp.net/p/1257004/2339034.aspx
 133                         // http://forums.asp.net/p/1383908/2936065.aspx
 134                         DataBoundControl dbc = control as DataBoundControl;
 135                         if (dbc != null) {
 136                                 IDynamicDataSource dds = dbc.DataSourceObject as IDynamicDataSource;
 137                                 if (dds == null)
 138                                         return;
 139
 140                                 RegisterDataSource (dds);
 141                                 MetaTable table = dds.GetTable ();
 142                                 if (table == null)
 143                                         return;
 144
 145                                 if (String.IsNullOrEmpty (dds.Where))
 146                                         dds.AutoGenerateWhereClause = true;
 147                                 else
 148                                         dds.AutoGenerateWhereClause = false;
 149
 150                                 Type contextType = dds.ContextType;
 151                                 if (contextType == null)
 152                                         dds.ContextType = table.DataContextType;
 153
 154                                 string entityName = dds.EntitySetName;
 155                                 if (String.IsNullOrEmpty (entityName))
 156                                         dds.EntitySetName = table.DataContextPropertyName;
 157
 158                                 if (AutoLoadForeignKeys) {
 159                                         var ldds = dds as LinqDataSource;
 160                                         if (ldds != null)
 161                                                 ldds.LoadWithForeignKeys (table.EntityType);
 162                                 }
 163
 164                                 var gv = control as GridView;
 165                                 if (gv != null) {
 166                                         gv.ColumnsGenerator = new AutoFieldGenerator (table);
 167                                         return;
 168                                 }
 169
 170                                 var dv = control as DetailsView;
 171                                 if (dv != null) {
 172                                         dv.RowsGenerator = new AutoFieldGenerator (table);
 173                                         return;
 174                                 }
 175                         }
 176                 }
 177
 178                 void RegisterDataSource (IDynamicDataSource dds)
 179                 {
 180                         if (knownDataSources == null) {
 181                                 knownDataSources = new Dictionary <IDynamicDataSource, bool> ();
 182                                 knownDataSources.Add (dds, true);
 183                                 return;
 184                         }
 185
 186                         if (knownDataSources.ContainsKey (dds))
 187                                 return;
 188
 189                         knownDataSources.Add (dds, true);
 190                 }
 191
 192                 bool ControlIsValid (Control control)
 193                 {
 194                         if (control is Repeater) {
 195                                 if (control.NamingContainer == null)
 196                                         throw new HttpException ("The Repeater control '" + control.ID + "' does not have a naming container.");
 197                                 return true;
 198                         }
 199
 200                         DataBoundControl dbc = control as DataBoundControl;
 201                         if (dbc == null)
 202                                 return false;
 203
 204                         return true;
 205                 }
 206         }
 207 }