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

   1 //
   2 // System.Web.UI.WebControls.RadioButtonList.cs
   3 //
   4 // Authors:
   5 //   Gaurav Vaish (gvaish@iitk.ac.in)
   6 //   Andreas Nahr (ClassDevelopment@A-SoftTech.com)
   7 //
   8 // (C) Gaurav Vaish (2002)
   9 // (C) 2003 Andreas Nahr
  10 //
  11 \r
  12 using System;\r
  13 using System.Collections.Specialized;\r
  14 using System.ComponentModel;\r
  15 using System.Globalization;\r
  16 using System.Web;\r
  17 using System.Web.UI;\r
  18 \r
  19 namespace System.Web.UI.WebControls\r
  20 {\r
  21         [ValidationProperty("SelectedItem")]\r
  22         public class RadioButtonList : ListControl, IRepeatInfoUser, INamingContainer, IPostBackDataHandler\r
  23         {\r
  24                 private bool  selectionIndexChanged;\r
  25                 private short  tabIndex;\r
  26 \r
  27                 public RadioButtonList(): base()\r
  28                 {\r
  29                         selectionIndexChanged = false;\r
  30                 }\r
  31
  32                 [DefaultValue (-1), Bindable (true), WebCategory ("Layout")]
  33                 [WebSysDescription ("The border left within a RadioButton.")]\r
  34                 public virtual int CellPadding\r
  35                 {\r
  36                         get\r
  37                         {\r
  38                                 if(ControlStyleCreated)\r
  39                                 {\r
  40                                         return (int)(((TableStyle)ControlStyle).CellPadding);\r
  41                                 }\r
  42                                 return -1;\r
  43                         }\r
  44                         set {
  45                                 if (value < -1)
  46                                         throw new ArgumentOutOfRangeException ("value", "CellPadding value has to be -1 for 'not set' or > -1.");\r
  47                                 ((TableStyle)ControlStyle).CellPadding = value;\r
  48                         }\r
  49                 }\r
  50
  51                 [DefaultValue (-1), Bindable (true), WebCategory ("Layout")]
  52                 [WebSysDescription ("The border left between RadioButtons.")]\r
  53                 public virtual int CellSpacing\r
  54                 {\r
  55                         get\r
  56                         {\r
  57                                 if(ControlStyleCreated)\r
  58                                 {\r
  59                                         return (int)(((TableStyle)ControlStyle).CellSpacing);\r
  60                                 }\r
  61                                 return -1;\r
  62                         }\r
  63                         set {
  64                                 if (value < -1)
  65                                         throw new ArgumentOutOfRangeException ("value", "CellSpacing value has to be -1 for 'not set' or > -1.");\r
  66                                 ((TableStyle)ControlStyle).CellSpacing = value;\r
  67                         }\r
  68                 }\r
  69
  70                 [DefaultValue (0), Bindable (true), WebCategory ("Layout")]
  71                 [WebSysDescription ("The number of columns that should be used to display the RadioButtons.")]\r
  72                 public virtual int RepeatColumns\r
  73                 {\r
  74                         get\r
  75                         {\r
  76                                 object o = ViewState["RepeatColumns"];\r
  77                                 if(o != null)\r
  78                                         return (int)o;\r
  79                                 return 0;\r
  80                         }\r
  81                         set {\r
  82                                 if (value < 0)\r
  83                                         throw new ArgumentOutOfRangeException ("value", "RepeatColumns value has to be 0 for 'not set' or > 0.");\r
  84                                 ViewState["RepeatColumns"] = value;\r
  85                         }\r
  86                 }\r
  87
  88                 [DefaultValue (typeof (RepeatDirection), "Vertical"), Bindable (true), WebCategory ("Layout")]
  89                 [WebSysDescription ("The direction that is followed when doing the layout.")]\r
  90                 public virtual RepeatDirection RepeatDirection\r
  91                 {\r
  92                         get\r
  93                         {\r
  94                                 object o = ViewState["RepeatDirection"];\r
  95                                 if(o != null)\r
  96                                         return (RepeatDirection)o;\r
  97                                 return RepeatDirection.Vertical;\r
  98                         }\r
  99                         set\r
 100                         {\r
 101                                 if(!Enum.IsDefined(typeof(RepeatDirection), value))\r
 102                                         throw new ArgumentOutOfRangeException ("value", "Only valid enumeration members are allowed");\r
 103                                 ViewState["RepeatDirection"] = value;\r
 104                         }\r
 105                 }\r
 106
 107                 [DefaultValue (typeof (RepeatLayout), "Table"), Bindable (true), WebCategory ("Layout")]
 108                 [WebSysDescription ("The method used to create the layout.")]\r
 109                 public virtual RepeatLayout RepeatLayout\r
 110                 {\r
 111                         get\r
 112                         {\r
 113                                 object o = ViewState["RepeatLayout"];\r
 114                                 if(o != null)\r
 115                                         return (RepeatLayout)o;\r
 116                                 return RepeatLayout.Table;\r
 117                         }\r
 118                         set\r
 119                         {\r
 120                                 if(!Enum.IsDefined(typeof(RepeatLayout), value))\r
 121                                         throw new ArgumentOutOfRangeException ("value", "Only valid enumeration members are allowed");\r
 122                                 ViewState["RepeatLayout"] = value;\r
 123                         }\r
 124                 }\r
 125
 126                 [DefaultValue (typeof (TextAlign), "Right"), Bindable (true), WebCategory ("Appearance")]
 127                 [WebSysDescription ("The alignment of the RadioButton text.")]\r
 128                 public virtual TextAlign TextAlign\r
 129                 {\r
 130                         get\r
 131                         {\r
 132                                 object o = ViewState["TextAlign"];\r
 133                                 if(o != null)\r
 134                                         return (TextAlign)o;\r
 135                                 return TextAlign.Right;\r
 136                         }\r
 137                         set\r
 138                         {\r
 139                                 if(!Enum.IsDefined(typeof(TextAlign), value))\r
 140                                         throw new ArgumentOutOfRangeException ("value", "Only valid enumeration members are allowed");\r
 141                                 ViewState["TextAlign"] = value;\r
 142                         }\r
 143                 }\r
 144 \r
 145                 protected override Style CreateControlStyle()\r
 146                 {\r
 147                         return new TableStyle(ViewState);\r
 148                 }\r
 149 \r
 150                 protected override void Render(HtmlTextWriter writer)\r
 151                 {\r
 152                         RepeatInfo info = new RepeatInfo();\r
 153                         Style cStyle = (ControlStyleCreated ? ControlStyle : null);\r
 154                         bool dirty = false;\r
 155                         tabIndex = TabIndex;\r
 156                         if(tabIndex != 0)\r
 157                         {\r
 158                                 dirty = !ViewState.IsItemDirty("TabIndex");\r
 159                                 TabIndex = 0;\r
 160                         }\r
 161                         info.RepeatColumns = RepeatColumns;\r
 162                         info.RepeatDirection = RepeatDirection;\r
 163                         info.RenderRepeater(writer, this, cStyle, this);\r
 164                         if(tabIndex != 0)\r
 165                         {\r
 166                                 TabIndex = tabIndex;\r
 167                         }\r
 168                         if(dirty)\r
 169                         {\r
 170                                 ViewState.SetItemDirty("TabIndex", false);\r
 171                         }\r
 172                 }\r
 173
 174                 bool IPostBackDataHandler.LoadPostData(string postDataKey, NameValueCollection postCollection)
 175                 {
 176                         string value = postCollection [postDataKey];
 177                         int c = Items.Count;
 178                         for (int i = 0; i < c; i++) {
 179                                 if (Items [i].Value != value)
 180                                         continue;
 181
 182                                 if (i != SelectedIndex) {
 183                                         SelectedIndex = i;
 184                                         selectionIndexChanged = true;
 185                                 }
 186
 187                                 return true;
 188                         }
 189
 190                         return false;
 191                 }
 192
 193                 void IPostBackDataHandler.RaisePostDataChangedEvent()\r
 194                 {\r
 195                         if(selectionIndexChanged)\r
 196                                 OnSelectedIndexChanged(EventArgs.Empty);\r
 197                 }\r
 198 \r
 199                 Style IRepeatInfoUser.GetItemStyle(System.Web.UI.WebControls.ListItemType itemType, int repeatIndex)\r
 200                 {\r
 201                         return null;\r
 202                 }\r
 203 \r
 204                 void IRepeatInfoUser.RenderItem (System.Web.UI.WebControls.ListItemType itemType,\r
 205                                                  int repeatIndex,\r
 206                                                  RepeatInfo repeatInfo,\r
 207                                                  HtmlTextWriter writer)\r
 208                 {\r
 209                         /* Create a new RadioButton as if it was defined in the page and render it */\r
 210                         RadioButton button = new RadioButton ();\r
 211                         button.Page = Page;
 212                         button.GroupName = UniqueID;\r
 213                         button.TextAlign = TextAlign;\r
 214                         button.AutoPostBack = AutoPostBack;\r
 215                         button.ID = ClientID + "_" + repeatIndex.ToString (NumberFormatInfo.InvariantInfo);;\r
 216                         button.TabIndex = tabIndex;
 217                         ListItem current = Items [repeatIndex];\r
 218                         button.Text = current.Text;\r
 219                         button.Attributes ["value"] = current.Value;\r
 220                         button.Checked = current.Selected;\r
 221                         button.Enabled = Enabled;\r
 222                         button.RenderControl (writer);\r
 223                 }\r
 224 \r
 225                 bool IRepeatInfoUser.HasFooter\r
 226                 {\r
 227                         get\r
 228                         {\r
 229                                 return false;\r
 230                         }\r
 231                 }\r
 232 \r
 233                 bool IRepeatInfoUser.HasHeader\r
 234                 {\r
 235                         get\r
 236                         {\r
 237                                 return false;\r
 238                         }\r
 239                 }\r
 240 \r
 241                 bool IRepeatInfoUser.HasSeparators\r
 242                 {\r
 243                         get\r
 244                         {\r
 245                                 return false;\r
 246                         }\r
 247                 }\r
 248 \r
 249                 int IRepeatInfoUser.RepeatedItemCount\r
 250                 {\r
 251                         get\r
 252                         {\r
 253                                 return Items.Count;\r
 254                         }\r
 255                 }\r
 256         }\r
 257 }\r