1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
|
//
// System.Web.UI.WebControls.ButtonColumn.cs
//
// Authors:
// Gaurav Vaish (gvaish@iitk.ac.in)
// Andreas Nahr (ClassDevelopment@A-SoftTech.com)
//
// (C) Gaurav Vaish (2002)
// (C) 2003 Andreas Nahr
//
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
using System;
using System.ComponentModel;
using System.Web;
using System.Web.UI;
namespace System.Web.UI.WebControls
{
public class ButtonColumn : DataGridColumn
{
private PropertyDescriptor textFieldDescriptor;
public ButtonColumn(): base()
{
}
public override void Initialize()
{
base.Initialize();
textFieldDescriptor = null;
}
public override void InitializeCell(TableCell cell, int columnIndex, ListItemType itemType)
{
base.InitializeCell(cell, columnIndex, itemType);
if (Enum.IsDefined(typeof(ListItemType), itemType) &&
itemType != ListItemType.Footer &&
itemType != ListItemType.Header)
{
WebControl toDisplay = null;
if(ButtonType == ButtonColumnType.PushButton)
{
Button b = new Button();
b.Text = Text;
b.CommandName = CommandName;
b.CausesValidation = false;
toDisplay = b;
} else
{
LinkButton lb = new DataGridLinkButton();
lb.Text = Text;
lb.CommandName = CommandName;
lb.CausesValidation = false;
toDisplay = lb;
}
if(DataTextField.Length > 0)
{
toDisplay.DataBinding += new EventHandler(OnDataBindButtonColumn);
}
cell.Controls.Add(toDisplay);
}
}
private void OnDataBindButtonColumn(object sender, EventArgs e)
{
Control ctrl = (Control)sender;
object item = ((DataGridItem)ctrl.NamingContainer).DataItem;
if(textFieldDescriptor == null)
{
textFieldDescriptor = TypeDescriptor.GetProperties(item).Find(DataTextField, true);
if(textFieldDescriptor == null && !DesignMode)
throw new HttpException(HttpRuntime.FormatResourceString("Field_Not_Found", DataTextField));
}
string text;
if(textFieldDescriptor != null)
{
text = FormatDataTextValue(textFieldDescriptor.GetValue(item));
} else
{
text = "Sample_DataBound_Text";
}
if(ctrl is LinkButton)
{
((LinkButton)ctrl).Text = text;
}
else
{
((Button)ctrl).Text = text;
}
}
protected virtual string FormatDataTextValue(object dataTextValue)
{
string retVal = null;
if(dataTextValue != null)
{
if(DataTextFormatString.Length > 0)
{
retVal = String.Format(DataTextFormatString, dataTextValue);
}
else
{
retVal = dataTextValue.ToString();
}
}
return retVal;
}
// LAMESPEC The framework uses Description values for metadata here. However they should be WebSysDescriptions
// because all metadata in this namespace has WebSysDescriptions
[DefaultValue (typeof (ButtonColumnType), "LinkButton"), WebCategory ("Misc")]
[Description ("The type of button used in this column.")]
public virtual ButtonColumnType ButtonType
{
get
{
object o = ViewState["ButtonType"];
if(o!=null)
return (ButtonColumnType)o;
return ButtonColumnType.LinkButton;
}
set
{
if(!System.Enum.IsDefined(typeof(ButtonColumnType), value))
throw new ArgumentException();
ViewState["ButtonType"] = value;
}
}
[DefaultValue (""), WebCategory ("Misc")]
[Description ("The command assigned to this column.")]
public virtual string CommandName
{
get
{
string cn = (string)ViewState["CommandName"];
if(cn!=null)
return cn;
return String.Empty;
}
set
{
ViewState["CommandName"] = value;
}
}
[DefaultValue (""), WebCategory ("Misc")]
[Description ("The datafield that is bound to the text property.")]
public virtual string DataTextField
{
get
{
string dtf = (string)ViewState["DataTextField"];
if(dtf!=null)
return dtf;
return String.Empty;
}
set
{
ViewState["DataTextField"] = value;
}
}
[DefaultValue (""), WebCategory ("Misc")]
[Description ("A format that is applied to the bound text property.")]
public virtual string DataTextFormatString
{
get
{
string dtfs = (string)ViewState["DataTextFormatString"];
if(dtfs!=null)
return dtfs;
return String.Empty;
}
set
{
ViewState["DataTextFormatString"] = value;
}
}
[DefaultValue (""), WebCategory ("Misc")]
[Description ("The text used for this button.")]
public virtual string Text
{
get
{
string text = (string)ViewState["Text"];
if(text!=null)
return text;
return String.Empty;
}
set
{
ViewState["Text"] = value;
}
}
}
}
|