2 // System.Data.DataColumnPropertyDescriptor.cs
5 // Daniel Morgan <danmorg@sc.rr.com>
7 // (c) copyright 2002 Daniel Morgan
11 // Copyright (C) 2004 Novell, Inc (http://www.novell.com)
13 // Permission is hereby granted, free of charge, to any person obtaining
14 // a copy of this software and associated documentation files (the
15 // "Software"), to deal in the Software without restriction, including
16 // without limitation the rights to use, copy, modify, merge, publish,
17 // distribute, sublicense, and/or sell copies of the Software, and to
18 // permit persons to whom the Software is furnished to do so, subject to
19 // the following conditions:
21 // The above copyright notice and this permission notice shall be
22 // included in all copies or substantial portions of the Software.
24 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
25 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
26 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
27 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
28 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
29 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
30 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
34 using System
.Data
.Common
;
35 using System
.ComponentModel
;
36 using System
.Reflection
;
40 internal class DataColumnPropertyDescriptor
: PropertyDescriptor
42 private bool readOnly
= true;
43 private Type componentType
= null;
44 private Type propertyType
= null;
45 private PropertyInfo prop
= null;
46 private int columnIndex
= 0;
48 public DataColumnPropertyDescriptor (string name
, int columnIndex
, Attribute
[] attrs
)
51 this.columnIndex
= columnIndex
;
54 public void SetReadOnly (bool value)
59 public void SetComponentType (Type type
)
64 public void SetPropertyType (Type type
)
69 private PropertyInfo
GetPropertyInfo ()
71 string defaultMemberName
= "";
72 object[] attribs
= componentType
.GetCustomAttributes (true);
74 for (int at
= 0; at
< attribs
.Length
; at
++) {
75 if (attribs
[at
] is DefaultMemberAttribute
) {
76 defaultMemberName
= ((DefaultMemberAttribute
) attribs
[at
]).MemberName
;
81 // FIXME: what do I do if a DefaultMemeberAttribute is not found?
82 // should I try looking for DefaultPropertyAttribute?
83 if (defaultMemberName
.Equals(""))
84 throw new Exception("Default property not found.");
86 Type
[] parmTypes
= new Type
[1];
87 parmTypes
[0] = propertyType
;
88 PropertyInfo propertyInfo
= componentType
.GetProperty (defaultMemberName
, parmTypes
);
92 public override object GetValue (object component
)
94 // FIXME: what is the correct way to Get a Value?
95 if(componentType
== typeof(DataRowView
) && component
is DataRowView
) {
96 DataRowView drv
= (DataRowView
) component
;
97 return drv
[base.Name
];
99 else if(componentType
== typeof(DbDataRecord
) && component
is DbDataRecord
) {
100 DbDataRecord dr
= (DbDataRecord
) component
;
101 return dr
[columnIndex
];
103 throw new InvalidOperationException();
107 prop = GetPropertyInfo ();
109 // FIXME: should I allow multiple parameters?
110 object[] parms = new object[1];
111 parms[0] = base.Name;
112 return prop.GetValue (component, parms);
116 public override void SetValue(object component
, object value)
118 DataRowView drv
= (DataRowView
) component
;
119 drv
[base.Name
] = value;
122 prop = GetPropertyInfo ();
124 if (readOnly == true) {
125 // FIXME: what really happens if read only?
126 throw new Exception("Property is ReadOnly");
129 // FIXME: should I allow multiple parameters?
130 object[] parms = new Object[1];
131 parms[0] = base.Name;
132 prop.SetValue (component, value, parms);
137 public override void ResetValue(object component
)
143 public override bool CanResetValue(object component
)
145 return false; // FIXEME
149 public override bool ShouldSerializeValue(object component
)
154 public override Type ComponentType
{
156 return componentType
;
160 public override bool IsReadOnly
{
166 public override Type PropertyType
{