mcs/class/System.Web/System.Web.UI.WebControls/RadioButtonList.cs

   1 //
   2 // System.Web.UI.WebControls.RadioButtonList.cs
   3 //
   4 // Authors:
   5 //    Jordi Mas i Hernandez (jordi@ximian.com)
   6 //
   7 // (C) 2005 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
  32 using System.Collections;
  33 using System.ComponentModel;
  34 using System.Collections.Specialized;
  35 using System.Security.Permissions;
  36
  37 namespace System.Web.UI.WebControls {
  38
  39         // CAS
  40         [AspNetHostingPermissionAttribute (SecurityAction.LinkDemand, Level = AspNetHostingPermissionLevel.Minimal)]
  41         [AspNetHostingPermissionAttribute (SecurityAction.InheritanceDemand, Level = AspNetHostingPermissionLevel.Minimal)]
  42         // attributes
  43         [ValidationProperty ("SelectedItem")]
  44         [SupportsEventValidation]
  45         public class RadioButtonList : ListControl, IRepeatInfoUser, INamingContainer, IPostBackDataHandler
  46         {
  47                 short tabIndex = 0;
  48
  49                 public RadioButtonList ()
  50                 {
  51
  52                 }
  53
  54                 [DefaultValue (-1)]
  55                 [WebSysDescription ("")]
  56                 [WebCategory ("Layout")]
  57                 public virtual int CellPadding {
  58                         get {
  59                                 if (ControlStyleCreated == false)
  60                                         return -1; // default value
  61
  62                                 return ((TableStyle) ControlStyle).CellPadding;
  63                         }
  64
  65                         set {
  66                                 ((TableStyle) ControlStyle).CellPadding = value;
  67                         }
  68                 }
  69
  70                 [DefaultValue (-1)]
  71                 [WebSysDescription ("")]
  72                 [WebCategory ("Layout")]
  73                 public virtual int CellSpacing {
  74                         get {
  75                                 if (ControlStyleCreated == false)
  76                                         return -1; // default value
  77
  78                                 return ((TableStyle) ControlStyle).CellSpacing;
  79                         }
  80
  81                         set {
  82                                 ((TableStyle) ControlStyle).CellSpacing = value;
  83                         }
  84                 }
  85
  86                 [DefaultValue (0)]
  87                 [WebSysDescription ("")]
  88                 [WebCategory ("Layout")]
  89                 public virtual int RepeatColumns  {
  90                         get {
  91                                 return ViewState.GetInt ("RepeatColumns", 0);
  92                         }
  93
  94                         set {
  95                                 if (value < 0)
  96                                         throw new ArgumentOutOfRangeException ("The number of columns is set to a negative value.");
  97
  98                                 ViewState ["RepeatColumns"] = value;
  99                         }
 100                 }
 101
 102                 [DefaultValue (RepeatDirection.Vertical)]
 103                 [WebSysDescription ("")]
 104                 [WebCategory ("Layout")]
 105                 public virtual RepeatDirection RepeatDirection {
 106                         get {
 107                                 return (RepeatDirection) ViewState.GetInt ("RepeatDirection", (int) RepeatDirection.Vertical);
 108                         }
 109
 110                         set {
 111                                 if (value != RepeatDirection.Horizontal && value != RepeatDirection.Vertical)
 112                                         throw new ArgumentOutOfRangeException ("he display direction of the list is not one of the RepeatDirection values.");
 113
 114                                 ViewState ["RepeatDirection"] = value;
 115                         }
 116                 }
 117
 118                 [DefaultValue (RepeatLayout.Table)]
 119                 [WebSysDescription ("")]
 120                 [WebCategory ("Layout")]
 121                 public virtual RepeatLayout RepeatLayout {
 122                         get {
 123                                 return (RepeatLayout) ViewState.GetInt ("RepeatLayout", (int) RepeatLayout.Table);
 124                         }
 125
 126                         set {
 127                                 bool outOfRange;
 128                                 outOfRange = value < RepeatLayout.Table || value > RepeatLayout.OrderedList;
 129                                 if (outOfRange)
 130                                         throw new ArgumentOutOfRangeException ("The radio buttons layout is not one of the RepeatLayout values.");
 131
 132                                 ViewState ["RepeatLayout"] = value;
 133                         }
 134                 }
 135
 136                 [DefaultValue (TextAlign.Right)]
 137                 [WebSysDescription ("")]
 138                 [WebCategory ("Appearance")]
 139                 public virtual TextAlign TextAlign {
 140                         get {
 141                                 return (TextAlign )ViewState.GetInt ("TextAlign", (int) TextAlign.Right);
 142                         }
 143
 144                         set {
 145                                 if (value != TextAlign.Left && value != TextAlign.Right)
 146                                         throw new ArgumentOutOfRangeException ("The label text alignment associated with the radio buttons is not one of the TextAlign values.");
 147
 148                                 ViewState ["TextAlign"] = value;
 149                         }
 150                 }
 151
 152                 // Interface properties
 153
 154                 protected virtual bool HasFooter {
 155                         get { return false; }
 156                 }
 157
 158                 protected virtual bool HasHeader {
 159                         get { return false; }
 160                 }
 161
 162                 protected virtual bool HasSeparators {
 163                         get { return false; }
 164                 }
 165
 166                 protected virtual int RepeatedItemCount {
 167                         get { return Items.Count; }
 168                 }
 169
 170                 bool IRepeatInfoUser.HasFooter {
 171                         get { return HasFooter; }
 172                 }
 173
 174                 bool IRepeatInfoUser.HasHeader {
 175                         get { return HasHeader; }
 176                 }
 177
 178                 bool IRepeatInfoUser.HasSeparators {
 179                         get { return HasSeparators; }
 180                 }
 181
 182                 int IRepeatInfoUser.RepeatedItemCount {
 183                         get { return RepeatedItemCount; }
 184                 }
 185
 186                 protected override Style CreateControlStyle ()
 187                 {
 188                         return new TableStyle (ViewState);
 189                 }
 190
 191                 // MSDN: Searches the current naming container for a server control
 192                 // with the specified ID and path offset. The FindControl method
 193                 // always returns the RadioButtonList object.
 194                 protected override Control FindControl (string id, int pathOffset)
 195                 {
 196                         return this;
 197                 }
 198
 199                 protected virtual Style GetItemStyle (ListItemType itemType, int repeatIndex)
 200                 {
 201                         return null;
 202                 }
 203
 204                 protected virtual void RenderItem (ListItemType itemType, int repeatIndex, RepeatInfo repeatInfo, HtmlTextWriter writer)
 205                 {
 206                         ListItem item = Items [repeatIndex];
 207
 208                         RadioButton radio = new RadioButton ();
 209                         radio.Text = item.Text;
 210                         radio.ID = ClientID + "_"  + repeatIndex;
 211                         radio.TextAlign = TextAlign;
 212                         radio.GroupName = UniqueID;
 213                         radio.Page = Page;
 214                         radio.Checked = item.Selected;
 215                         radio.ValueAttribute = item.Value;
 216                         radio.AutoPostBack = AutoPostBack;
 217                         radio.Enabled = IsEnabled;
 218                         radio.TabIndex = tabIndex;
 219                         radio.ValidationGroup = ValidationGroup;
 220                         radio.CausesValidation = CausesValidation;
 221                         if (radio.HasAttributes)
 222                                 radio.Attributes.Clear ();
 223                         if (item.HasAttributes)
 224                                 radio.Attributes.CopyFrom (item.Attributes);
 225
 226                         radio.RenderControl (writer);
 227                 }
 228
 229                 protected virtual bool LoadPostData (string postDataKey, NameValueCollection postCollection)
 230                 {
 231                         EnsureDataBound ();
 232                         string val = postCollection [postDataKey];
 233                         ListItemCollection items = Items;
 234                         int end = items.Count;
 235                         int selected = SelectedIndex;
 236                         for (int i = 0; i < end; i++) {
 237                                 ListItem item = items [i];
 238                                 if (item == null || val != item.Value)
 239                                         continue;
 240
 241                                 if (i != selected) {
 242                                         SelectedIndex = i;
 243                                         return true;
 244                                 }
 245                         }
 246
 247                         return false;
 248                 }
 249
 250                 protected virtual void RaisePostDataChangedEvent ()
 251                 {
 252                         ValidateEvent (UniqueID, String.Empty);
 253                         Page page = Page;
 254                         if (CausesValidation && page != null)
 255                                 page.Validate (ValidationGroup);
 256
 257                         OnSelectedIndexChanged (EventArgs.Empty);
 258                 }
 259
 260                 bool IPostBackDataHandler.LoadPostData (string postDataKey, NameValueCollection postCollection)
 261                 {
 262                         return LoadPostData (postDataKey, postCollection);
 263                 }
 264
 265                 void IPostBackDataHandler.RaisePostDataChangedEvent ()
 266                 {
 267                         RaisePostDataChangedEvent ();
 268                 }
 269
 270                 Style IRepeatInfoUser.GetItemStyle (ListItemType itemType,  int repeatIndex)
 271                 {
 272                         return GetItemStyle (itemType, repeatIndex);
 273                 }
 274
 275                 void IRepeatInfoUser.RenderItem (ListItemType itemType, int repeatIndex, RepeatInfo repeatInfo, HtmlTextWriter writer)
 276                 {
 277                         RenderItem (itemType, repeatIndex, repeatInfo, writer);
 278                 }
 279
 280                 protected internal override void Render (HtmlTextWriter writer)
 281                 {
 282                         Page page = Page;
 283                         if (page != null)
 284                                 page.ClientScript.RegisterForEventValidation (UniqueID);
 285
 286                         if (Items.Count == 0)
 287                                 return;
 288
 289                         RepeatInfo repeat = new RepeatInfo ();
 290                         repeat.RepeatColumns = RepeatColumns;
 291                         repeat.RepeatDirection = RepeatDirection;
 292                         repeat.RepeatLayout = RepeatLayout;
 293
 294                         tabIndex = TabIndex;
 295                         TabIndex = 0;
 296
 297                         repeat.RenderRepeater (writer, this, ControlStyle, this);
 298
 299                         TabIndex = tabIndex;
 300                 }
 301         }
 302
 303 }
 304
 305
 306
 307
 308