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1 using System;
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2 using System.Web.UI.Design;
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3 using System.Security.Permissions;
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4 using System.ComponentModel;
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5
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6 namespace BLToolkit.Web.UI.Design
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7 {
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8 [SecurityPermission(SecurityAction.Demand, Flags=SecurityPermissionFlag.UnmanagedCode)]
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9 class WebObjectBinderDesigner : DataSourceDesigner
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10 {
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11 private DesignerDataSourceView _view;
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12 private WebObjectBinder _component;
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13
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14 public override string[] GetViewNames()
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15 {
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16 return new string[] { "DefaultView" };
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17 }
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18
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19 public override DesignerDataSourceView GetView(string viewName)
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20 {
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21 if (string.IsNullOrEmpty(viewName))
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22 viewName = "DefaultView";
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23
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24 if (viewName != "DefaultView")
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25 return null;
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26
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27 if (_view == null)
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28 _view = new ObjectDesignerDataSourceView(this, viewName);
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29
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30 return _view;
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31 }
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32
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33 public override void Initialize(IComponent component)
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34 {
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35 _component = (WebObjectBinder)component;
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36
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37 base.Initialize(component);
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38 }
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39
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40 public override bool CanConfigure
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41 {
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42 get { return true; }
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43 }
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44
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45 public override void Configure()
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46 {
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47 }
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48
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49 #region ObjectDesignerDataSourceView
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50
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51 class ObjectDesignerDataSourceView : DesignerDataSourceView
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52 {
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53 public ObjectDesignerDataSourceView(WebObjectBinderDesigner owner, string viewName)
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54 : base(owner, viewName)
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55 {
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56 _owner = owner;
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57 }
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58
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59 private readonly WebObjectBinderDesigner _owner;
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60
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61 public override IDataSourceViewSchema Schema
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62 {
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63 get { return new ObjectViewSchema(_owner); }
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64 }
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65
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66 public override bool CanDelete { get { return _owner._component._objectBinder.AllowRemove; } }
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67 public override bool CanInsert { get { return _owner._component._objectBinder.AllowNew; } }
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68 public override bool CanUpdate { get { return _owner._component._objectBinder.AllowEdit; } }
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69 public override bool CanPage { get { return true; } }
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70 public override bool CanSort { get { return true; } }
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71 public override bool CanRetrieveTotalRowCount { get { return true; } }
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72
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73 class ObjectViewSchema : IDataSourceViewSchema
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74 {
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75 public ObjectViewSchema(WebObjectBinderDesigner owner)
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76 {
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77 _owner = owner;
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78 }
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79
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80 private readonly WebObjectBinderDesigner _owner;
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81
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82 public IDataSourceViewSchema[] GetChildren()
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83 {
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84 return null;
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85 }
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86
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87 public IDataSourceFieldSchema[] GetFields()
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88 {
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89 PropertyDescriptorCollection fields =
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90 ((ITypedList)_owner._component._objectBinder).GetItemProperties(null);
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91
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92 IDataSourceFieldSchema[] schema = new IDataSourceFieldSchema[fields.Count];
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93
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94 for (int i = 0; i < schema.Length; i++)
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95 schema[i] = new ObjectFieldSchema(fields[i]);
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96
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97 return schema;
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98 }
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99
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100 public string Name
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101 {
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102 get
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103 {
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104 Type type = _owner._component._objectBinder.ItemType;
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105
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106 return type != null? type.Name: string.Empty;
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107 }
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108 }
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109
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110 class ObjectFieldSchema : IDataSourceFieldSchema
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111 {
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112 public ObjectFieldSchema(PropertyDescriptor propertyDescriptor)
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113 {
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114 _propertyDescriptor = propertyDescriptor;
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115
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116 DataObjectFieldAttribute attr =
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117 (DataObjectFieldAttribute)_propertyDescriptor.Attributes[typeof(DataObjectFieldAttribute)];
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118
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119 if (attr != null)
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120 {
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121 _length = attr.Length;
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122 _primaryKey = attr.PrimaryKey;
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123 _isIdentity = attr.IsIdentity;
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124 _isNullable = attr.IsNullable;
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125 }
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126 }
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127
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128 private readonly PropertyDescriptor _propertyDescriptor;
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129 private readonly int _length = -1;
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130 private readonly bool _isIdentity;
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131 private readonly bool _isNullable;
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132 private readonly bool _primaryKey;
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133
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134 public Type DataType { get { return _propertyDescriptor.PropertyType; } }
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135 public bool Identity { get { return _isIdentity; } }
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136 public bool IsReadOnly { get { return _propertyDescriptor.IsReadOnly; } }
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137 public bool IsUnique { get { return false; } }
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138 public int Length { get { return _length; } }
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139 public string Name { get { return _propertyDescriptor.Name; } }
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140 public int Precision { get { return -1; } }
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141 public bool PrimaryKey { get { return _primaryKey; } }
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142 public int Scale { get { return -1; } }
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143
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144 public bool Nullable
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145 {
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146 get
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147 {
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148 Type type = _propertyDescriptor.PropertyType;
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149 Type underlyingType = System.Nullable.GetUnderlyingType(type);
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150
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151 return underlyingType != null? true: _isNullable;
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152 }
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153 }
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154 }
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155 }
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156 }
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157
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158 #endregion
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159 }
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160 }
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