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
221
222
223
224
225
226
227
228
|
//------------------------------------------------------------------------------
// <copyright file="Label.cs" company="Microsoft">
// Copyright (c) Microsoft Corporation. All rights reserved.
// </copyright>
//------------------------------------------------------------------------------
namespace System.Web.UI.WebControls {
using System;
using System.ComponentModel;
using System.Web;
using System.Web.UI;
using System.Web.Util;
/// <devdoc>
/// <para>Interacts with the parser to build a <see cref='System.Web.UI.WebControls.Label'/> control.</para>
/// </devdoc>
public class LabelControlBuilder : ControlBuilder {
/// <internalonly/>
/// <devdoc>
/// <para>Specifies whether white space literals are allowed.</para>
/// </devdoc>
public override bool AllowWhitespaceLiterals() {
return false;
}
}
/// <devdoc>
/// <para>Constructs a label for displaying text programmatcially on a
/// page.</para>
/// </devdoc>
[
ControlBuilderAttribute(typeof(LabelControlBuilder)),
ControlValueProperty("Text"),
DataBindingHandler("System.Web.UI.Design.TextDataBindingHandler, " + AssemblyRef.SystemDesign),
DefaultProperty("Text"),
ParseChildren(false),
Designer("System.Web.UI.Design.WebControls.LabelDesigner, " + AssemblyRef.SystemDesign),
ToolboxData("<{0}:Label runat=\"server\" Text=\"Label\"></{0}:Label>")
]
public class Label : WebControl, ITextControl {
private bool _textSetByAddParsedSubObject = false;
/// <devdoc>
/// <para>Initializes a new instance of the <see cref='System.Web.UI.WebControls.Label'/> class and renders
/// it as a SPAN tag.</para>
/// </devdoc>
public Label() {
}
/// <devdoc>
/// </devdoc>
internal Label(HtmlTextWriterTag tag) : base(tag) {
}
/// <devdoc>
/// <para>[To be supplied.]</para>
/// </devdoc>
[
DefaultValue(""),
IDReferenceProperty(),
TypeConverter(typeof(AssociatedControlConverter)),
WebCategory("Accessibility"),
WebSysDescription(SR.Label_AssociatedControlID),
Themeable(false)
]
public virtual string AssociatedControlID {
get {
string s = (string)ViewState["AssociatedControlID"];
return (s == null) ? String.Empty : s;
}
set {
ViewState["AssociatedControlID"] = value;
}
}
internal bool AssociatedControlInControlTree {
get {
object o = ViewState["AssociatedControlNotInControlTree"];
return (o == null ? true : (bool)o);
}
set {
ViewState["AssociatedControlNotInControlTree"] = value;
}
}
public override bool SupportsDisabledAttribute {
get {
return RenderingCompatibility < VersionUtil.Framework40;
}
}
internal override bool RequiresLegacyRendering {
get {
return true;
}
}
protected override HtmlTextWriterTag TagKey {
get {
if (AssociatedControlID.Length != 0) {
return HtmlTextWriterTag.Label;
}
return base.TagKey;
}
}
/// <devdoc>
/// <para>Gets or sets the text content of the <see cref='System.Web.UI.WebControls.Label'/>
/// control.</para>
/// </devdoc>
[
Localizable(true),
Bindable(true),
WebCategory("Appearance"),
DefaultValue(""),
WebSysDescription(SR.Label_Text),
PersistenceMode(PersistenceMode.InnerDefaultProperty)
]
public virtual string Text {
get {
object o = ViewState["Text"];
return((o == null) ? String.Empty : (string)o);
}
set {
if (HasControls()) {
Controls.Clear();
}
ViewState["Text"] = value;
}
}
protected override void AddAttributesToRender(HtmlTextWriter writer) {
string associatedControlID = AssociatedControlID;
if (associatedControlID.Length != 0) {
if (AssociatedControlInControlTree) {
Control wc = FindControl(associatedControlID);
if (wc == null) {
// Don't throw in the designer.
if (!DesignMode)
throw new HttpException(SR.GetString(SR.LabelForNotFound, associatedControlID, ID));
}
else {
writer.AddAttribute(HtmlTextWriterAttribute.For, wc.ClientID);
}
}
else {
writer.AddAttribute(HtmlTextWriterAttribute.For, associatedControlID);
}
}
base.AddAttributesToRender(writer);
}
/// <internalonly/>
/// <devdoc>
/// </devdoc>
protected override void AddParsedSubObject(object obj) {
if (HasControls()) {
base.AddParsedSubObject(obj);
}
else {
if (obj is LiteralControl) {
if (_textSetByAddParsedSubObject) {
Text += ((LiteralControl)obj).Text;
}
else {
Text = ((LiteralControl)obj).Text;
}
_textSetByAddParsedSubObject = true;
}
else {
string currentText = Text;
if (currentText.Length != 0) {
Text = String.Empty;
base.AddParsedSubObject(new LiteralControl(currentText));
}
base.AddParsedSubObject(obj);
}
}
}
/// <internalonly/>
/// <devdoc>
/// <para>Load previously saved state.
/// Overridden to synchronize Text property with LiteralContent.</para>
/// </devdoc>
protected override void LoadViewState(object savedState) {
if (savedState != null) {
base.LoadViewState(savedState);
string s = (string)ViewState["Text"];
// Dev10 703061 If Text is set, we want to clear out any child controls, but not dirty viewstate
if (s != null && HasControls()) {
Controls.Clear();
}
}
}
/// <internalonly/>
/// <devdoc>
/// <para>Renders the contents of the <see cref='System.Web.UI.WebControls.Label'/> into the specified writer.</para>
/// </devdoc>
protected internal override void RenderContents(HtmlTextWriter writer) {
if (HasRenderingData()) {
base.RenderContents(writer);
}
else {
writer.Write(Text);
}
}
}
}
|
