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

   1 //
   2 // System.Web.UI.WebControls.BoundColumn.cs
   3 //
   4 // Author:
   5 //      Dick Porter  <dick@ximian.com>
   6 //
   7 // Copyright (C) 2005 Novell, Inc (http://www.novell.com)
   8 //
   9 // Permission is hereby granted, free of charge, to any person obtaining
  10 // a copy of this software and associated documentation files (the
  11 // "Software"), to deal in the Software without restriction, including
  12 // without limitation the rights to use, copy, modify, merge, publish,
  13 // distribute, sublicense, and/or sell copies of the Software, and to
  14 // permit persons to whom the Software is furnished to do so, subject to
  15 // the following conditions:
  16 //
  17 // The above copyright notice and this permission notice shall be
  18 // included in all copies or substantial portions of the Software.
  19 //
  20 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  21 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  22 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  23 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  24 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  25 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  26 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  27 //
  28
  29 using System.ComponentModel;
  30 using System.Security.Permissions;
  31
  32 namespace System.Web.UI.WebControls {
  33
  34         // CAS
  35         [AspNetHostingPermission (SecurityAction.LinkDemand, Level = AspNetHostingPermissionLevel.Minimal)]
  36         [AspNetHostingPermission (SecurityAction.InheritanceDemand, Level = AspNetHostingPermissionLevel.Minimal)]
  37         public class BoundColumn : DataGridColumn
  38         {
  39                 string data_format_string;
  40
  41                 public BoundColumn ()
  42                 {
  43                 }
  44
  45                 public static readonly string thisExpr = "!";
  46
  47                 [DefaultValue("")]
  48                 [WebSysDescription ("")]
  49                 [WebCategory ("Misc")]
  50                 public virtual string DataField
  51                 {
  52                         get {
  53                                 return ViewState.GetString ("DataField", String.Empty);
  54                         }
  55                         set {
  56                                 ViewState ["DataField"] = value;
  57                         }
  58                 }
  59
  60                 [DefaultValue("")]
  61                 [WebSysDescription ("")]
  62                 [WebCategory ("Misc")]
  63                 public virtual string DataFormatString
  64                 {
  65                         get {
  66                                 return ViewState.GetString ("DataFormatString", String.Empty);
  67                         }
  68                         set {
  69                                 ViewState ["DataFormatString"] = value;
  70                         }
  71                 }
  72
  73                 [DefaultValue(false)]
  74                 [WebSysDescription ("")]
  75                 [WebCategory ("Misc")]
  76                 public virtual bool ReadOnly
  77                 {
  78                         get {
  79                                 return ViewState.GetBool ("ReadOnly", false);
  80                         }
  81                         set {
  82                                 ViewState ["ReadOnly"] = value;
  83                         }
  84                 }
  85
  86                 public override void Initialize ()
  87                 {
  88                         data_format_string = DataFormatString;
  89                 }
  90
  91                 public override void InitializeCell (TableCell cell, int columnIndex,
  92                                 ListItemType itemType)
  93                 {
  94                         base.InitializeCell (cell, columnIndex, itemType);
  95
  96                         string df = DataField;
  97
  98                         switch (itemType) {
  99                         case ListItemType.Item:
 100                         case ListItemType.SelectedItem:
 101                         case ListItemType.AlternatingItem:
 102                                 if (df != null && df.Length != 0)
 103                                         cell.DataBinding += new EventHandler (ItemDataBinding);
 104                                 break;
 105                         case ListItemType.EditItem:
 106                                 if (ReadOnly && df != null && df.Length != 0) {
 107                                         cell.DataBinding += new EventHandler (ItemDataBinding);
 108                                         break;
 109                                 }
 110                                 TextBox tb = new TextBox ();
 111                                 if (df != null && df.Length != 0)
 112                                         tb.DataBinding += new EventHandler (ItemDataBinding);
 113                                 cell.Controls.Add (tb);
 114                                 break;
 115                         }
 116                 }
 117
 118                 protected virtual string FormatDataValue (object dataValue)
 119                 {
 120                         if (dataValue == null)
 121                                 return "";
 122
 123                         if (data_format_string == String.Empty)
 124                                 return dataValue.ToString ();
 125
 126                         return String.Format (data_format_string, dataValue);
 127                 }
 128
 129                 string GetValueFromItem (DataGridItem item)
 130                 {
 131                         object val;
 132                         if (DataField != thisExpr) {
 133                                 val = DataBinder.Eval (item.DataItem, DataField);
 134                         } else {
 135                                 val = item.DataItem;
 136                         }
 137
 138                         string text = FormatDataValue (val);
 139                         return (text != "" ?  text : "&nbsp;");
 140                 }
 141
 142                 void ItemDataBinding (object sender, EventArgs e)
 143                 {
 144                         Control ctrl = (Control) sender;
 145                         string text = GetValueFromItem ((DataGridItem) ctrl.NamingContainer);
 146
 147                         TableCell cell = sender as TableCell;
 148                         if (cell == null) {
 149                                 TextBox tb = (TextBox) sender;
 150                                 tb.Text = text;
 151                         } else {
 152                                 cell.Text = text;
 153                         }
 154                 }
 155         }
 156 }
 157