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 #if NET_2_0
  45         [SupportsEventValidation]
  46 #endif
  47         public class RadioButtonList : ListControl, IRepeatInfoUser,
  48                 INamingContainer, IPostBackDataHandler {
  49 #if !NET_2_0
  50                 bool need_raise;
  51 #endif
  52                 short tabIndex = 0;
  53
  54                 public RadioButtonList ()
  55                 {
  56
  57                 }
  58
  59 #if ONLY_1_1
  60                 [Bindable (true)]
  61 #endif
  62                 [DefaultValue (-1)]
  63                 [WebSysDescription ("")]
  64                 [WebCategory ("Layout")]
  65                 public virtual int CellPadding {
  66                         get {
  67                                 if (ControlStyleCreated == false)
  68                                         return -1; // default value
  69
  70                                 return ((TableStyle) ControlStyle).CellPadding;
  71                         }
  72
  73                         set {
  74                                 ((TableStyle) ControlStyle).CellPadding = value;
  75                         }
  76                 }
  77
  78 #if ONLY_1_1
  79                 [Bindable (true)]
  80 #endif
  81                 [DefaultValue (-1)]
  82                 [WebSysDescription ("")]
  83                 [WebCategory ("Layout")]
  84                 public virtual int CellSpacing {
  85                         get {
  86                                 if (ControlStyleCreated == false)
  87                                         return -1; // default value
  88
  89                                 return ((TableStyle) ControlStyle).CellSpacing;
  90                         }
  91
  92                         set {
  93                                 ((TableStyle) ControlStyle).CellSpacing = value;
  94                         }
  95                 }
  96
  97 #if ONLY_1_1
  98                 [Bindable (true)]
  99 #endif
 100                 [DefaultValue (0)]
 101                 [WebSysDescription ("")]
 102                 [WebCategory ("Layout")]
 103                 public virtual int RepeatColumns  {
 104                         get {
 105                                 return ViewState.GetInt ("RepeatColumns", 0);
 106                         }
 107
 108                         set {
 109                                 if (value < 0)
 110                                         throw new ArgumentOutOfRangeException ("The number of columns is set to a negative value.");
 111
 112                                 ViewState ["RepeatColumns"] = value;
 113                         }
 114                 }
 115
 116 #if ONLY_1_1
 117                 [Bindable (true)]
 118 #endif
 119                 [DefaultValue (RepeatDirection.Vertical)]
 120                 [WebSysDescription ("")]
 121                 [WebCategory ("Layout")]
 122                 public virtual RepeatDirection RepeatDirection {
 123                         get {
 124                                 return (RepeatDirection) ViewState.GetInt ("RepeatDirection", (int) RepeatDirection.Vertical);
 125                         }
 126
 127                         set {
 128                                 if (value != RepeatDirection.Horizontal && value != RepeatDirection.Vertical)
 129                                         throw new ArgumentOutOfRangeException ("he display direction of the list is not one of the RepeatDirection values.");
 130
 131                                 ViewState ["RepeatDirection"] = value;
 132                         }
 133                 }
 134
 135 #if ONLY_1_1
 136                 [Bindable (true)]
 137 #endif
 138                 [DefaultValue (RepeatLayout.Table)]
 139                 [WebSysDescription ("")]
 140                 [WebCategory ("Layout")]
 141                 public virtual RepeatLayout RepeatLayout {
 142                         get {
 143                                 return (RepeatLayout) ViewState.GetInt ("RepeatLayout", (int) RepeatLayout.Table);
 144                         }
 145
 146                         set {
 147                                 if (value != RepeatLayout.Flow && value != RepeatLayout.Table)
 148                                         throw new ArgumentOutOfRangeException ("The radio buttons layout is not one of the RepeatLayout values.");
 149
 150                                 ViewState ["RepeatLayout"] = value;
 151                         }
 152                 }
 153
 154 #if ONLY_1_1
 155                 [Bindable (true)]
 156 #endif
 157                 [DefaultValue (TextAlign.Right)]
 158                 [WebSysDescription ("")]
 159                 [WebCategory ("Appearance")]
 160                 public virtual TextAlign TextAlign {
 161                         get {
 162                                 return (TextAlign )ViewState.GetInt ("TextAlign", (int) TextAlign.Right);
 163                         }
 164
 165                         set {
 166                                 if (value != TextAlign.Left && value != TextAlign.Right)
 167                                         throw new ArgumentOutOfRangeException ("The label text alignment associated with the radio buttons is not one of the TextAlign values.");
 168
 169                                 ViewState ["TextAlign"] = value;
 170                         }
 171                 }
 172
 173                 // Interface properties
 174
 175 #if NET_2_0
 176                 protected virtual
 177 #endif
 178                 bool HasFooter {
 179                         get { return false; }
 180                 }
 181
 182 #if NET_2_0
 183                 protected virtual
 184 #endif
 185                 bool HasHeader {
 186                         get { return false; }
 187                 }
 188
 189 #if NET_2_0
 190                 protected virtual
 191 #endif
 192                 bool HasSeparators {
 193                         get { return false; }
 194                 }
 195
 196 #if NET_2_0
 197                 protected virtual
 198 #endif
 199                 int RepeatedItemCount {
 200                         get { return Items.Count; }
 201                 }
 202
 203                 bool IRepeatInfoUser.HasFooter {
 204                         get { return HasFooter; }
 205                 }
 206
 207                 bool IRepeatInfoUser.HasHeader {
 208                         get { return HasHeader; }
 209                 }
 210
 211                 bool IRepeatInfoUser.HasSeparators {
 212                         get { return HasSeparators; }
 213                 }
 214
 215                 int IRepeatInfoUser.RepeatedItemCount {
 216                         get { return RepeatedItemCount; }
 217                 }
 218
 219                 protected override Style CreateControlStyle ()
 220                 {
 221                         return new TableStyle (ViewState);
 222                 }
 223
 224 #if NET_2_0
 225                 // MSDN: Searches the current naming container for a server control
 226                 // with the specified ID and path offset. The FindControl method
 227                 // always returns the RadioButtonList object.
 228                 protected override Control FindControl (string id, int pathOffset)
 229                 {
 230                         return this;
 231                 }
 232 #endif
 233
 234 #if NET_2_0
 235                 protected virtual
 236 #endif
 237                 Style GetItemStyle (ListItemType itemType, int repeatIndex)
 238                 {
 239                         return null;
 240                 }
 241
 242 #if NET_2_0
 243                 protected virtual
 244 #endif
 245                 void RenderItem (ListItemType itemType, int repeatIndex, RepeatInfo repeatInfo, HtmlTextWriter writer)
 246                 {
 247                         ListItem item = Items [repeatIndex];
 248
 249                         RadioButton radio = new RadioButton ();
 250                         radio.Text = item.Text;
 251                         radio.ID = ClientID + "_"  + repeatIndex;
 252                         radio.TextAlign = TextAlign;
 253                         radio.GroupName = UniqueID;
 254                         radio.Page = Page;
 255                         radio.Checked = item.Selected;
 256                         radio.ValueAttribute = item.Value;
 257                         radio.AutoPostBack = AutoPostBack;
 258                         radio.Enabled = Enabled;
 259                         radio.TabIndex = tabIndex;
 260 #if NET_2_0
 261                         radio.ValidationGroup = ValidationGroup;
 262                         radio.CausesValidation = CausesValidation;
 263                         if (radio.HasAttributes)
 264                                 radio.Attributes.Clear ();
 265                         if (item.HasAttributes)
 266                                 radio.Attributes.CopyFrom (item.Attributes);
 267 #endif
 268                         radio.RenderControl (writer);
 269                 }
 270 #if NET_2_0
 271                 protected virtual
 272 #endif
 273                 bool LoadPostData (string postDataKey, NameValueCollection postCollection)
 274                 {
 275 #if NET_2_0
 276                         EnsureDataBound ();
 277 #endif
 278                         string val = postCollection [postDataKey];
 279                         ListItemCollection items = Items;
 280                         int end = items.Count;
 281                         int selected = SelectedIndex;
 282                         for (int i = 0; i < end; i++) {
 283                                 ListItem item = items [i];
 284                                 if (item == null || val != item.Value)
 285                                         continue;
 286
 287                                 if (i != selected) {
 288                                         SelectedIndex = i;
 289 #if NET_2_0
 290                                         return true;
 291 #else
 292                                         need_raise = true;
 293 #endif
 294                                 }
 295 #if !NET_2_0
 296                                 return true;
 297 #endif
 298                         }
 299
 300                         return false;
 301                 }
 302
 303 #if NET_2_0
 304                 protected virtual
 305 #endif
 306                 void RaisePostDataChangedEvent ()
 307                 {
 308 #if NET_2_0
 309                         ValidateEvent (UniqueID, String.Empty);
 310                         if (CausesValidation)
 311                                 Page.Validate (ValidationGroup);
 312 #endif
 313
 314 #if !NET_2_0
 315                         if (need_raise)
 316 #endif
 317                                 OnSelectedIndexChanged (EventArgs.Empty);
 318                 }
 319
 320                 bool IPostBackDataHandler.LoadPostData (string postDataKey, NameValueCollection postCollection)
 321                 {
 322                         return LoadPostData (postDataKey, postCollection);
 323                 }
 324
 325                 void IPostBackDataHandler.RaisePostDataChangedEvent ()
 326                 {
 327                         RaisePostDataChangedEvent ();
 328                 }
 329
 330                 Style IRepeatInfoUser.GetItemStyle (ListItemType itemType,  int repeatIndex)
 331                 {
 332                         return GetItemStyle (itemType, repeatIndex);
 333                 }
 334
 335                 void IRepeatInfoUser.RenderItem (ListItemType itemType, int repeatIndex, RepeatInfo repeatInfo, HtmlTextWriter writer)
 336                 {
 337                         RenderItem (itemType, repeatIndex, repeatInfo, writer);
 338                 }
 339
 340 #if NET_2_0
 341                 protected internal
 342 #else
 343                 protected
 344 #endif
 345                 override void Render (HtmlTextWriter writer)
 346                 {
 347 #if NET_2_0
 348                         if (Page != null)
 349                                 Page.ClientScript.RegisterForEventValidation (UniqueID);
 350
 351                         if (Items.Count == 0)
 352                                 return;
 353 #endif
 354                         RepeatInfo repeat = new RepeatInfo ();
 355                         repeat.RepeatColumns = RepeatColumns;
 356                         repeat.RepeatDirection = RepeatDirection;
 357                         repeat.RepeatLayout = RepeatLayout;
 358
 359                         tabIndex = TabIndex;
 360                         TabIndex = 0;
 361
 362                         repeat.RenderRepeater (writer, this, ControlStyle, this);
 363
 364                         TabIndex = tabIndex;
 365                 }
 366         }
 367
 368 }
 369
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 371
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 373