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
  31 namespace System.Web.UI.WebControls {
  32         public class BoundColumn : DataGridColumn
  33         {
  34
  35                 private string data_format_string;
  36
  37                 public BoundColumn ()
  38                 {
  39                 }
  40
  41                 public static readonly string thisExpr = "!";
  42
  43                 [DefaultValue("")]
  44                 [WebSysDescription ("")]
  45                 [WebCategory ("Misc")]
  46                 public virtual string DataField
  47                 {
  48                         get {
  49                                 return ViewState.GetString ("DataField", String.Empty);
  50                         }
  51                         set {
  52                                 ViewState ["DataField"] = value;
  53                         }
  54                 }
  55
  56                 [DefaultValue("")]
  57                 [WebSysDescription ("")]
  58                 [WebCategory ("Misc")]
  59                 public virtual string DataFormatString
  60                 {
  61                         get {
  62                                 return ViewState.GetString ("DataFormatString", String.Empty);
  63                         }
  64                         set {
  65                                 ViewState ["DataFormatString"] = value;
  66                         }
  67                 }
  68
  69                 [DefaultValue(false)]
  70                 [WebSysDescription ("")]
  71                 [WebCategory ("Misc")]
  72                 public virtual bool ReadOnly
  73                 {
  74                         get {
  75                                 return ViewState.GetBool ("ReadOnly", false);
  76                         }
  77                         set {
  78                                 ViewState ["ReadOnly"] = value;
  79                         }
  80                 }
  81
  82                 public override void Initialize ()
  83                 {
  84                         data_format_string = DataFormatString;
  85                 }
  86
  87                 public override void InitializeCell (TableCell cell, int columnIndex,
  88                                 ListItemType itemType)
  89                 {
  90                         base.InitializeCell (cell, columnIndex, itemType);
  91
  92                         switch (itemType) {
  93                         case ListItemType.Item:
  94                         case ListItemType.SelectedItem:
  95                         case ListItemType.AlternatingItem:
  96                                 cell.DataBinding += new EventHandler (ItemDataBinding);
  97                                 break;
  98                         case ListItemType.EditItem:
  99                                 string df = DataField;
 100                                 TextBox tb = new TextBox ();
 101                                 if (df != null && df != "")
 102                                         tb.DataBinding += new EventHandler (ItemDataBinding);
 103                                 cell.Controls.Add (tb);
 104                                 break;
 105                         }
 106                 }
 107
 108                 protected virtual string FormatDataValue (object dataValue)
 109                 {
 110                         if (dataValue == null)
 111                                 return "";
 112
 113                         if (data_format_string == String.Empty)
 114                                 return dataValue.ToString ();
 115
 116                         return String.Format (data_format_string, dataValue);
 117                 }
 118
 119                 string GetValueFromItem (DataGridItem item)
 120                 {
 121                         object val;
 122                         if (DataField != thisExpr) {
 123                                 val = DataBinder.Eval (item.DataItem, DataField);
 124                         } else {
 125                                 val = item.DataItem;
 126                         }
 127
 128                         string text = FormatDataValue (val);
 129                         return (text != "" ?  text : "&nbsp;");
 130                 }
 131
 132                 void ItemDataBinding (object sender, EventArgs e)
 133                 {
 134                         Control ctrl = (Control) sender;
 135                         string text = GetValueFromItem ((DataGridItem) ctrl.NamingContainer);
 136
 137                         TableCell cell = sender as TableCell;
 138                         if (cell == null) {
 139                                 TextBox tb = (TextBox) sender;
 140                                 tb.Text = text;
 141                         } else {
 142                                 cell.Text = text;
 143                         }
 144                 }
 145         }
 146 }
 147