mcs/class/System.Design/System.Web.UI.Design.WebControls/RepeaterDesigner.cs

   1
   2 //
   3 // Permission is hereby granted, free of charge, to any person obtaining
   4 // a copy of this software and associated documentation files (the
   5 // "Software"), to deal in the Software without restriction, including
   6 // without limitation the rights to use, copy, modify, merge, publish,
   7 // distribute, sublicense, and/or sell copies of the Software, and to
   8 // permit persons to whom the Software is furnished to do so, subject to
   9 // the following conditions:
  10 //
  11 // The above copyright notice and this permission notice shall be
  12 // included in all copies or substantial portions of the Software.
  13 //
  14 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  15 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  16 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  17 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  18 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  19 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  20 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  21 //
  22 /**
  23  * Namespace:   System.Web.UI.Design.WebControls
  24  * Class:       RepeaterDesigner
  25  *
  26  * Author:      Gaurav Vaish
  27  * Maintainer:  gvaish_mono@lycos.com
  28  *
  29  * (C) Gaurav Vaish (2002)
  30  */
  31
  32 using System;
  33 using System.Collections;
  34 using System.Data;
  35 using System.Web.UI.WebControls;
  36 using System.Web.UI.Design;
  37
  38 namespace System.Web.UI.Design.WebControls
  39 {
  40         public class RepeaterDesigner : ControlDesigner, IDataSourceProvider
  41         {
  42                 private DataTable desTimeDataTable;
  43                 private DataTable dummyDataTable;
  44                 private Repeater  repeater;
  45
  46                 public RepeaterDesigner()
  47                 {
  48                 }
  49
  50                 public string DataMember
  51                 {
  52                         get
  53                         {
  54                                 return repeater.DataMember;
  55                         }
  56                         set
  57                         {
  58                                 repeater.DataMember = value;
  59                         }
  60                 }
  61
  62                 public string DataSource
  63                 {
  64                         get
  65                         {
  66                                 DataBinding db = DataBindings["DataSource"];
  67                                 if(db != null)
  68                                         return db.Expression;
  69                                 return String.Empty;
  70                         }
  71                         set
  72                         {
  73                                 if(value == null || value.Length == 0)
  74                                 {
  75                                         DataBindings.Remove("DataSource");
  76                                 } else
  77                                 {
  78                                         DataBinding toSet = new DataBinding("DataSource",
  79                                                                             typeof(IEnumerable), value);
  80                                         toSet.Expression = value;
  81                                         DataBindings.Add(toSet);
  82                                 }
  83                                 OnDataSourceChanged();
  84                                 OnBindingsCollectionChanged("DataSource");
  85                         }
  86                 }
  87
  88                 public virtual void OnDataSourceChanged()
  89                 {
  90                         desTimeDataTable = null;
  91                 }
  92
  93                 protected bool TemplateExists
  94                 {
  95                         get
  96                         {
  97                                 return (repeater.ItemTemplate != null ||
  98                                         repeater.HeaderTemplate != null ||
  99                                         repeater.FooterTemplate != null ||
 100                                         repeater.AlternatingItemTemplate != null);
 101                         }
 102                 }
 103
 104                 protected IEnumerable GetDesignTimeDataSource(int minimumRows)
 105                 {
 106                         return GetDesignTimeDataSource(GetResolvedSelectedDataSource(),
 107                                                        minimumRows);
 108                 }
 109
 110                 protected IEnumerable GetDesignTimeDataSource(IEnumerable selectedDataSource,
 111                                                               int minimumRows)
 112                 {
 113                         DataTable toDeploy = desTimeDataTable;
 114                         if(toDeploy == null)
 115                         {
 116                                 if(selectedDataSource != null)
 117                                 {
 118                                         desTimeDataTable = DesignTimeData.CreateSampleDataTable(
 119                                                                           selectedDataSource);
 120                                         toDeploy = desTimeDataTable;
 121                                 } else
 122                                 {
 123                                         if(dummyDataTable == null)
 124                                                 dummyDataTable = DesignTimeData.CreateDummyDataTable();
 125                                         toDeploy = dummyDataTable;
 126                                 }
 127                         }
 128                         return DesignTimeData.GetDesignTimeDataSource(toDeploy,
 129                                                                       minimumRows);
 130                 }
 131
 132                 protected override void Dispose(bool disposing)
 133                 {
 134                         if(disposing)
 135                                 repeater = null;
 136                         base.Dispose(disposing);
 137                 }
 138
 139                 public object GetSelectedDataSource()
 140                 {
 141                         object retVal = null;
 142                         DataBinding db = DataBindings["DataSource"];
 143                         if(db != null)
 144                         {
 145                                 retVal = DesignTimeData.GetSelectedDataSource(repeater, db.Expression);
 146                         }
 147                         return retVal;
 148                 }
 149
 150                 public virtual IEnumerable GetResolvedSelectedDataSource()
 151                 {
 152                         IEnumerable retVal = null;
 153                         DataBinding db = DataBindings["DataSource"];
 154                         if(db != null)
 155                         {
 156                                 retVal = DesignTimeData.GetSelectedDataSource(repeater, db.Expression, DataMember);
 157                         }
 158                         return retVal;
 159                 }
 160         }
 161 }