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

   1 /**\r
   2  * Namespace: System.Web.UI.WebControls\r
   3  * Class:     BaseDataList\r
   4  *\r
   5  * Author:  Gaurav Vaish\r
   6  * Maintainer: gvaish@iitk.ac.in\r
   7  * Contact: <my_scripts2001@yahoo.com>, <gvaish@iitk.ac.in>\r
   8  * Status:  20%\r
   9  *\r
  10  * (C) Gaurav Vaish (2001)\r
  11  */\r
  12 \r
  13 using System;\r
  14 using System.Collections;\r
  15 using System.Web;\r
  16 using System.Web.UI;\r
  17 \r
  18 namespace System.Web.UI.WebControls\r
  19 {\r
  20         public abstract class BaseDataList: WebControl\r
  21         {\r
  22 \r
  23                 private int cellPadding = -1;\r
  24                 private int cellSpacing = 0;\r
  25                 private object dataSource = null;\r
  26                 private string dataKeyField = String.Empty;\r
  27                 private DataKeyCollection dataKeys;             // TODO: From where do get the values into it?\r
  28                 private string dataMember;\r
  29                 private GridLines gridLines;\r
  30                 private HorizontalAlign hAlign;\r
  31 \r
  32                 public BaseDataList()\r
  33                 {\r
  34                         // TODO Something\r
  35                         dataKeys = new DataKeyCollection(new ArrayList());\r
  36                         dataMember = String.Empty;\r
  37                         gridLines = GridLines.Both;\r
  38                         hAlign = HorizontalAlign.NotSet;\r
  39                 }\r
  40 \r
  41                 public static bool IsBindableType(Type type)\r
  42                 {\r
  43                         //TODO: To see what has to be here\r
  44                         if(type.IsPrimitive)\r
  45                         {\r
  46                                 //Type.GetTypeFromHandle(new RuntimeTypeHandle());\r
  47                         }\r
  48                         return false; //for the time being, to be able to make it compile\r
  49                 }\r
  50 \r
  51                 public virtual int CellPadding\r
  52                 {\r
  53                         get\r
  54                         {\r
  55                                 return cellPadding;\r
  56                         }\r
  57                         set\r
  58                         {\r
  59                                 cellPadding = value;\r
  60                         }\r
  61                 }\r
  62 \r
  63                 public virtual int CellSpacing\r
  64                 {\r
  65                         get\r
  66                         {\r
  67                                 return cellSpacing;\r
  68                         }\r
  69                         set\r
  70                         {\r
  71                                 cellSpacing = value;\r
  72                         }\r
  73                 }\r
  74 \r
  75                 public virtual string DataKeyField\r
  76                 {\r
  77                         get\r
  78                         {\r
  79                                 return dataKeyField;\r
  80                         }\r
  81                         set\r
  82                         {\r
  83                                 dataKeyField = value;\r
  84                         }\r
  85                 }\r
  86 \r
  87                 public DataKeyCollection DataKeys\r
  88                 {\r
  89                         get\r
  90                         {\r
  91                                 return dataKeys;\r
  92                         }\r
  93                 }\r
  94 \r
  95                 public string DataMember\r
  96                 {\r
  97                         get\r
  98                         {\r
  99                                 return dataMember;\r
 100                         }\r
 101                         set\r
 102                         {\r
 103                                 dataMember = value;\r
 104                         }\r
 105                 }\r
 106 \r
 107                 public virtual object DataSource\r
 108                 {\r
 109                         get\r
 110                         {\r
 111                                 return dataSource;\r
 112                         }\r
 113                         set\r
 114                         {\r
 115                                 dataSource = value;\r
 116                         }\r
 117                 }\r
 118 \r
 119                 public virtual GridLines GridLines\r
 120                 {\r
 121                         get\r
 122                         {\r
 123                                 return gridLines;\r
 124                         }\r
 125                         set\r
 126                         {\r
 127                                 gridLines = value;\r
 128                         }\r
 129                 }\r
 130 \r
 131                 public virtual HorizontalAlign HorizontalAlign\r
 132                 {\r
 133                         get\r
 134                         {\r
 135                                 return hAlign;\r
 136                         }\r
 137                         set\r
 138                         {\r
 139                                 hAlign = value;\r
 140                         }\r
 141                 }\r
 142 \r
 143                 public override void DataBind()\r
 144                 {\r
 145                         // TODO: have to write the implementation\r
 146                         // I am not sure of whether it will be of any use here since\r
 147                         // I am an abstract class, and have no identity of myself.\r
 148                         //dataBindEventArgs = EventArgs.Empty;\r
 149                         OnDataBinding(EventArgs.Empty);\r
 150                         throw new NotImplementedException();\r
 151                 }\r
 152 \r
 153                 //TODO: Check - where are the following abstract methods?\r
 154                 /*\r
 155                  * CreateControlHierarchy(bool)\r
 156                  * PrepareControlHierarchy()\r
 157                 */\r
 158 \r
 159                 protected override void AddParsedSubObject(object o)\r
 160                 {\r
 161                         // Preventing literal controls from being added as children: Do nothing here.\r
 162                 }\r
 163 \r
 164                 protected override void CreateChildControls()\r
 165                 {\r
 166                         Controls.Clear();\r
 167                         if(ViewState["_!ItemCount"]!=null)\r
 168                         {\r
 169                                 CreateControlHierarchy(true);\r
 170                                 ClearChildViewState();\r
 171                         }\r
 172                 }\r
 173 \r
 174                 protected abstract void CreateControlHierarchy(bool useDataSource);\r
 175         }\r
 176 }\r