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

   1 //
   2 // DynamicDataExtensions.cs
   3 //
   4 // Authors:
   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.Globalization;
  36 using System.Security.Permissions;
  37 using System.Security.Principal;
  38 using System.Web.Caching;
  39 using System.Web.UI;
  40 using System.Web.UI.WebControls;
  41 using System.Web.DynamicData.ModelProviders;
  42
  43 namespace System.Web.DynamicData
  44 {
  45         [AspNetHostingPermission (SecurityAction.LinkDemand, Level = AspNetHostingPermissionLevel.Minimal)]
  46         public static class DynamicDataExtensions
  47         {
  48                 public static object ConvertEditedValue (this IFieldFormattingOptions formattingOptions, string value)
  49                 {
  50                         // Not a surprise anymore...
  51                         if (formattingOptions == null)
  52                                 throw new NullReferenceException ();
  53
  54                         if (String.IsNullOrEmpty (value)) {
  55                                 if (formattingOptions.ConvertEmptyStringToNull)
  56                                         return null;
  57                         } else {
  58                                 string nullDisplayText = formattingOptions.NullDisplayText;
  59                                 if (!String.IsNullOrEmpty (nullDisplayText) && String.Compare (value, nullDisplayText, StringComparison.Ordinal) == 0)
  60                                         return null;
  61                         }
  62
  63                         return value;
  64                 }
  65
  66                 [MonoTODO]
  67                 public static void EnablePersistedSelection (this BaseDataBoundControl dataBoundControl)
  68                 {
  69                         throw new NotImplementedException ();
  70                 }
  71
  72                 [MonoTODO]
  73                 public static void ExpandDynamicWhereParameters (this IDynamicDataSource dataSource)
  74                 {
  75                         // http://forums.asp.net/p/1396453/3005197.aspx#3005197
  76                         throw new NotImplementedException ();
  77                 }
  78
  79                 [MonoTODO]
  80                 public static IDynamicDataSource FindDataSourceControl (this Control current)
  81                 {
  82                         var control = current as BaseDataBoundControl;
  83                         if (control == null)
  84                                 return null;
  85
  86                         string dataSourceID = control.DataSourceID;
  87                         if (!String.IsNullOrEmpty (dataSourceID))
  88                                 return control.DataSource as IDynamicDataSource;
  89
  90                         Control namingContainer = control.NamingContainer;
  91                         IDynamicDataSource dds;
  92                         while (namingContainer != null) {
  93                                 dds = namingContainer.FindControl (dataSourceID) as IDynamicDataSource;
  94                                 if (dds != null)
  95                                         return dds;
  96
  97                                 namingContainer = namingContainer.NamingContainer;
  98                         }
  99
 100                         return null;
 101                 }
 102
 103                 [MonoTODO]
 104                 public static Control FindFieldTemplate (this Control control, string columnName)
 105                 {
 106                         throw new NotImplementedException ();
 107                 }
 108
 109                 public static MetaTable FindMetaTable (this Control current)
 110                 {
 111                         // .NET doesn't perform the check, we will
 112                         if (current == null)
 113                                 throw new NullReferenceException ();
 114
 115                         while (current != null) {
 116                                 DataBoundControl dbc = current as DataBoundControl;
 117                                 if (dbc != null) {
 118                                         IDynamicDataSource dds = dbc.DataSourceObject as IDynamicDataSource;
 119                                         if (dds != null)
 120                                                 return dds.GetTable ();
 121                                 }
 122
 123                                 current = current.NamingContainer;
 124                         }
 125
 126                         return null;
 127                 }
 128
 129                 [MonoTODO]
 130                 public static string FormatEditValue (this IFieldFormattingOptions formattingOptions, object fieldValue)
 131                 {
 132                         throw new NotImplementedException ();
 133                 }
 134
 135                 [MonoTODO]
 136                 public static string FormatValue (this IFieldFormattingOptions formattingOptions, object fieldValue)
 137                 {
 138                         throw new NotImplementedException ();
 139                 }
 140
 141                 static string GetDataSourceId (IDynamicDataSource dataSource)
 142                 {
 143                         Control c = dataSource as Control;
 144                         if (c == null)
 145                                 return String.Empty;
 146
 147                         return c.ID;
 148                 }
 149
 150                 public static MetaTable GetTable (this IDynamicDataSource dataSource)
 151                 {
 152                         if (dataSource == null)
 153                                 return null;
 154
 155                         string entitySetName = dataSource.EntitySetName;
 156                         if (String.IsNullOrEmpty (entitySetName)) {
 157                                 // LAMESPEC: MSDN says we should throw in this case, but .NET calls
 158                                 // DynamicDataRouteHandler.GetRequestMetaTable(HttpContext
 159                                 // httpContext) instead (eventually)
 160                                 MetaTable ret = DynamicDataRouteHandler.GetRequestMetaTable (HttpContext.Current);
 161                                 if (ret == null)
 162                                         throw new InvalidOperationException ("The control '" + GetDataSourceId (dataSource) +
 163                                                                              "' does not have a TableName property and a table name cannot be inferred from the URL.");
 164                         }
 165
 166                         Type contextType = dataSource.ContextType;
 167                         if (contextType == null)
 168                                 throw new InvalidOperationException ("The ContextType property of control '" + GetDataSourceId (dataSource) + "' must specify a data context");
 169
 170                         return MetaModel.GetModel (contextType).GetTable (entitySetName);
 171                 }
 172
 173                 [MonoTODO]
 174                 public static void LoadWithForeignKeys (this LinqDataSource dataSource, Type rowType)
 175                 {
 176                         throw new NotImplementedException ();
 177                 }
 178         }
 179 }