GridView中动态添加模板列和其子控件集合
一、实施说明：
1 实施原因：
因为在做一个MOSS WebPart控件时候，遇到一个问题，如何选择需要导出的数据列；
GridView的数据源是动态的，所以没有办法静态使用模板列，来选择导出的列；
之所以没有用BoundField的原因，是因为一列数据列中不能放入两个或两个以上的控件，
以及不能在表头加入相关控件。所以，最后，我采用动态添加模板列的方法解决这个问题，
欢迎大家测试和改善。
2、待改善问题：
a、如何控制模板列中子控件集合的UI布局，
b、HeaderTemplate区域不能对子控件进行数据绑定。
如图所示：
选择文件清单“Site_Menu”时候：
选择文件清单“Web 部件库”时候
二、代码结构
类对象的使用关系：
GridVeiw-->Column-->TemplateField-->Header/DataRow-->MyTemplateColumn-->ColumnField;
其中MyTemplateField继承ITemplate;
ControlField为MyTemplateField提供构造模板列的相关数据。
三、代码内容
1、MyTemplateColumn.cs，详情如下：
MyTemplateColumn.cs
1
using
System;
2
using
System.Data;
3
using
System.Configuration;
4
using
System.Linq;
5
using
System.Web;
6
using
System.Web.Security;
7
using
System.Web.UI;
8
using
System.Web.UI.HtmlControls;
9
using
System.Web.UI.WebControls;
10
using
System.Web.UI.WebControls.WebParts;
11
using
System.Xml.Linq;
12
13
namespace
Test.WebControls.GridView.MyTemplateColumn
14
{
15
public
class
MyTmeplateColumn:ITemplate
16
{
17
///
<summary>
18
///
委托
19
///
</summary>
20
///
<param name="sender"></param>
21
///
<param name="e"></param>
22
public
delegate
void
EventHandler(
object
sender, EventArgs e);
23
///
<summary>
24
///
事件
25
///
</summary>
26
public
event
EventHandler eh;
27
///
<summary>
28
///
模板列的类型
29
///
</summary>
30
private
DataControlRowType templateType;
31
32
///
<summary>
33
///
数据绑定列的标题
34
///
</summary>
35
private
string
HeaderText;
36
///
<summary>
37
///
模板列控件对象的集合
<控件ID, 控件对象>
38
///
</summary>
39
private
System.Collections.Generic.Dictionary
<
string
, ControlField
>
ControlsFieldList;
40
41
public
MyTmeplateColumn(DataControlRowType type,
string
headerText)
42
{
43
this
.templateType
=
type;
44
this
.HeaderText
=
headerText;
45
}
46
47
public
MyTmeplateColumn(DataControlRowType type,
string
headerText, System.Collections.Generic.Dictionary
<
string
, ControlField
>
ControlsFieldList)
48
{
49
this
.templateType
=
type;
50
this
.HeaderText
=
headerText;
51
this
.ControlsFieldList
=
ControlsFieldList;
52
}
53
54
///
<summary>
55
///
进行数据绑定
56
///
</summary>
57
///
<param name="container"></param>
58
public
void
InstantiateIn(System.Web.UI.Control container)
59
{
60
switch
(templateType)
61
{
62
case
DataControlRowType.Header:
63
{
64
if
(
this
.ControlsFieldList
!=
null
&&
this
.ControlsFieldList.Count
>
0
)
65
{
66
for
(
int
i
=
0
; i
<
this
.ControlsFieldList.Count; i
++
)
67
{
68
string
ID
=
this
.ControlsFieldList.Keys.ToArray()[i].ToString().Trim();
69
ControlField controlField
=
this
.ControlsFieldList[ID];
70
71
//
执行数据绑定
72
System.Web.UI.Control control
=
controlField.UIControl;
73
if
(control
!=
null
&&
controlField
!=
null
)
74
{
75
//
control.DataBinding += new System.EventHandler(ControlFieldDataBinding);
76
container.Controls.Add(control);
77
}
78
}
79
}
80
81
Literal lc
=
new
Literal();
82
lc.Text
=
this
.HeaderText;
83
container.Controls.Add(lc);
84
85
break
;
86
}
87
case
DataControlRowType.DataRow:
88
{
89
90
if
(
this
.ControlsFieldList
!=
null
&&
this
.ControlsFieldList.Count
>
0
)
91
{
92
for
(
int
i
=
0
; i
<
this
.ControlsFieldList.Count; i
++
)
93
{
94
string
ID
=
this
.ControlsFieldList.Keys.ToArray()[i].ToString().Trim();
95
ControlField controlField
=
this
.ControlsFieldList[ID];
96
97
//
执行数据绑定
98
System.Web.UI.Control control
=
controlField.UIControl;
99
if
(control
!=
null
&&
controlField
!=
null
)
100
{
101
control.DataBinding
+=
new
System.EventHandler(ControlFieldDataBinding);
102
container.Controls.Add(control);
103
}
104
}
105
}
106
break
;
107
}
108
default
:
109
{
110
break
;
111
}
112
}
113
}
114
115
///
<summary>
116
///
ControlField的对象进行数据绑定
117
///
</summary>
118
///
<param name="controlField"></param>
119
public
void
ControlFieldDataBinding(
object
sender, EventArgs e)
120
{
121
GridViewRow container
=
null
;
122
ControlField controlField
=
null
;
123
124
string
control_type
=
sender.GetType().Name;
125
string
control_id
=
""
;
126
switch
(control_type)
127
{
128
case
"
Label
"
:
129
{
130
control_id
=
(sender
as
Label).ID.Trim();
131
break
;
132
}
133
case
"
TextBox
"
:
134
{
135
control_id
=
(sender
as
TextBox).ID.Trim();
136
break
;
137
}
138
case
"
LinkButton
"
:
139
{
140
control_id
=
(sender
as
LinkButton).ID.Trim();
141
break
;
142
}
143
case
"
Button
"
:
144
{
145
control_id
=
(sender
as
Button).ID.Trim();
146
break
;
147
}
148
case
"
DropDownList
"
:
149
{
150
control_id
=
(sender
as
DropDownList).ID.Trim();
151
break
;
152
}
153
case
"
CheckBox
"
:
154
{
155
control_id
=
(sender
as
CheckBox).ID.Trim();
156
break
;
157
}
158
case
"
RadioButton
"
:
159
{
160
control_id
=
(sender
as
RadioButton).ID.Trim();
161
break
;
162
}
163
}
164
if
(control_id
!=
""
)
165
{
166
controlField
=
this
.ControlsFieldList[control_id];
167
}
168
169
170
if
(controlField
!=
null
)
171
{
172
//
转化子控件
173
System.Collections.Generic.Dictionary
<
string
,
string
>
fields
=
null
;
//
<property, key> = <服务器控件属性名称， 属性绑定数据字段>
174
string
property
=
""
;
//
服务器控件属性名称
175
string
key
=
""
;
//
属性绑定数据字段
176
string
value
=
""
;
//
临时变量
177
//
178
switch
(controlField.ControlType)
179
{
180
#region
按控件类别，进行数据绑定
181
case
ControlTypeEnum.Label:
182
{
183
#region
Label DataBinding
184
Label obj
=
controlField.UIControl
as
Label;
185
container
=
obj.NamingContainer
as
GridViewRow;
186
187
if
(obj
!=
null
&&
container
!=
null
)
188
{
189
if
(obj
!=
null
&&
controlField.Fields
!=
null
&&
controlField.Fields.Count
>
0
)
190
{
191
fields
=
controlField.Fields;
192
for
(
int
i
=
0
; i
<
fields.Count; i
++
)
193
{
194
property
=
fields.Keys.ToArray()[i];
195
if
(property
!=
null
&&
property.Trim()
!=
""
)
196
{
197
key
=
fields[property];
198
value
=
DataBinder.Eval(container.DataItem, key).ToString().Trim();
199
switch
(property.Trim().ToUpper())
200
{
201
case
"
TEXT
"
:
202
{
203
obj.Text
=
value;
204
break
;
205
}
206
case
"
TOOLTIP
"
:
207
{
208
obj.ToolTip
=
value;
209
break
;
210
}
211
case
"
ENABLED
"
:
212
{
213
obj.Enabled
=
Convert.ToBoolean(value);
214
break
;
215
}
216
case
"
VISIBLE
"
:
217
{
218
obj.Visible
=
Convert.ToBoolean(value);
219
break
;
220
}
221
}
222
}
223
}
224
}
225
}
226
break
;
227
#endregion
228
}
229
case
ControlTypeEnum.TextBox:
230
{
231
#region
TextBox DataBinding
232
TextBox obj
=
controlField.UIControl
as
TextBox;
//
sender as TextBox;
233
container
=
obj.NamingContainer
as
GridViewRow;
234
235
if
(obj
!=
null
&&
container
!=
null
)
236
{
237
if
(obj
!=
null
&&
controlField.Fields
!=
null
&&
controlField.Fields.Count
>
0
)
238
{
239
fields
=
controlField.Fields;
240
for
(
int
i
=
0
; i
<
fields.Count; i
++
)
241
{
242
property
=
fields.Keys.ToArray()[i];
243
if
(property
!=
null
&&
property.Trim()
!=
""
)
244
{
245
key
=
fields[property];
246
value
=
DataBinder.Eval(container.DataItem, key).ToString().Trim();
247
switch
(property.Trim().ToUpper())
248
{
249
case
"
TEXT
"
:
250
{
251
obj.Text
=
value;
252
break
;
253
}
254
case
"
TOOLTIP
"
:
255
{
256
obj.ToolTip
=
value;
257
break
;
258
}
259
case
"
ENABLED
"
:
260
{
261
obj.Enabled
=
Convert.ToBoolean(value);
262
break
;
263
}
264
case
"
VISIBLE
"
:
265
{
266
obj.Visible
=
Convert.ToBoolean(value);
267
break
;
268
}
269
}
270
}
271
}
272
}
273
}
274
break
;
275
#endregion
276
}
277
case
ControlTypeEnum.LinkButton:
278
{
279
#region
LinkButton DataBinding
280
LinkButton obj
=
controlField.UIControl
as
LinkButton;
281
container
=
obj.NamingContainer
as
GridViewRow;
282
283
if
(obj
!=
null
&&
container
!=
null
)
284
{
285
if
(obj
!=
null
&&
controlField.Fields
!=
null
&&
controlField.Fields.Count
>
0
)
286
{
287
fields
=
controlField.Fields;
288
for
(
int
i
=
0
; i
<
fields.Count; i
++
)
289
{
290
property
=
fields.Keys.ToArray()[i];
291
if
(property
!=
null
&&
property.Trim()
!=
""
)
292
{
293
key
=
fields[property];
294
value
=
DataBinder.Eval(container.DataItem, key).ToString().Trim();
295
switch
(property.Trim().ToUpper())
296
{
297
case
"
TEXT
"
:
298
{
299
obj.Text
=
value;
300
break
;
301
}
302
case
"
TOOLTIP
"
:
303
{
304
obj.ToolTip
=
value;
305
break
;
306
}
307
case
"
ENABLED
"
:
308
{
309
obj.Enabled
=
Convert.ToBoolean(value);
310
break
;
311
}
312
case
"
VISIBLE
"
:
313
{
314
obj.Visible
=
Convert.ToBoolean(value);
315
break
;
316
}
317
case
"
POSTBACKURL
"
:
318
{
319
obj.PostBackUrl
=
value;
320
break
;
321
}
322
}
323
}
324
}
325
}
326
}
327
break
;
328
#endregion
329
}
330
case
ControlTypeEnum.Button:
331
{
332
#region
Button DataBinding
333
Button obj
=
controlField.UIControl
as
Button;
334
container
=
obj.NamingContainer
as
GridViewRow;
335
336
if
(obj
!=
null
&&
container
!=
null
)
337
{
338
if
(obj
!=
null
&&
controlField.Fields
!=
null
&&
controlField.Fields.Count
>
0
)
339
{
340
fields
=
controlField.Fields;
341
for
(
int
i
=
0
; i
<
fields.Count; i
++
)
342
{
343
property
=
fields.Keys.ToArray()[i];
344
if
(property
!=
null
&&
property.Trim()
!=
""
)
345
{
346
key
=
fields[property];
347
value
=
DataBinder.Eval(container.DataItem, key).ToString().Trim();
348
switch
(property.Trim().ToUpper())
349
{
350
case
"
TEXT
"
:
351
{
352
obj.Text
=
value;
353
break
;
354
}
355
case
"
TOOLTIP
"
:
356
{
357
obj.ToolTip
=
value;
358
break
;
359
}
360
case
"
ENABLED
"
:
361
{
362
obj.Enabled
=
Convert.ToBoolean(value);
363
break
;
364
}
365
case
"
VISIBLE
"
:
366
{
367
obj.Visible
=
Convert.ToBoolean(value);
368
break
;
369
}
370
case
"
POSTBACKURL
"
:
371
{
372
obj.PostBackUrl
=
value;
373
break
;
374
}
375
}
376
}
377
}
378
}
379
}
380
break
;
381
#endregion
\
382
}
383
case
ControlTypeEnum.DropDownList:
384
{
385
386
break
;
387
}
388
case
ControlTypeEnum.CheckBox:
389
{
390
#region
CheckBox DataBinding
391
CheckBox obj
=
controlField.UIControl
as
CheckBox;
392
container
=
obj.NamingContainer
as
GridViewRow;
393
394
if
(obj
!=
null
&&
container
!=
null
)
395
{
396
if
(obj
!=
null
&&
controlField.Fields
!=
null
&&
controlField.Fields.Count
>
0
)
397
{
398
fields
=
controlField.Fields;
399
for
(
int
i
=
0
; i
<
fields.Count; i
++
)
400
{
401
property
=
fields.Keys.ToArray()[i];
402
if
(property
!=
null
&&
property.Trim()
!=
""
)
403
{
404
key
=
fields[property];
405
value
=
DataBinder.Eval(container.DataItem, key).ToString().Trim();
406
switch
(property.Trim().ToUpper())
407
{
408
case
"
TEXT
"
:
409
{
410
obj.Text
=
value;
411
break
;
412
}
413
case
"
TOOLTIP
"
:
414
{
415
obj.ToolTip
=
value;
416
break
;
417
}
418
case
"
ENABLED
"
:
419
{
420
obj.Enabled
=
Convert.ToBoolean(value);
421
break
;
422
}
423
case
"
VISIBLE
"
:
424
{
425
obj.Visible
=
Convert.ToBoolean(value);
426
break
;
427
}
428
case
"
CHECKED
"
:
429
{
430
obj.Checked
=
Convert.ToBoolean(value);
431
break
;
432
}
433
}
434
}
435
}
436
}
437
}
438
break
;
439
#endregion
440
}
441
case
ControlTypeEnum.RadioButton:
442
{
443
#region
RadioButton DataBinding
444
RadioButton obj
=
controlField.UIControl
as
RadioButton;
445
container
=
obj.NamingContainer
as
GridViewRow;
446
447
if
(obj
!=
null
&&
container
!=
null
)
448
{
449
if
(obj
!=
null
&&
controlField.Fields
!=
null
&&
controlField.Fields.Count
>
0
)
450
{
451
fields
=
controlField.Fields;
452
for
(
int
i
=
0
; i
<
fields.Count; i
++
)
453
{
454
property
=
fields.Keys.ToArray()[i];
455
if
(property
!=
null
&&
property.Trim()
!=
""
)
456
{
457
key
=
fields[property];
458
value
=
DataBinder.Eval(container.DataItem, key).ToString().Trim();
459
switch
(property.Trim().ToUpper())
460
{
461
case
"
TEXT
"
:
462
{
463
obj.Text
=
value;
464
break
;
465
}
466
case
"
TOOLTIP
"
:
467
{
468
obj.ToolTip
=
value;
469
break
;
470
}
471
case
"
ENABLED
"
:
472
{
473
obj.Enabled
=
Convert.ToBoolean(value);
474
break
;
475
}
476
case
"
VISIBLE
"
:
477
{
478
obj.Visible
=
Convert.ToBoolean(value);
479
break
;
480
}
481
case
"
CHECKED
"
:
482
{
483
obj.Checked
=
Convert.ToBoolean(value);
484
break
;
485
}
486
}
487
}
488
}
489
}
490
}
491
break
;
492
#endregion
493
}
494
#endregion
495
}
496
}
497
498
}
499
500
}
501
}
502
2、ControlField.cs代码详情：
ControlField.cs代码详情
1
using
System;
2
using
System.Data;
3
using
System.Configuration;
4
using
System.Linq;
5
using
System.Web;
6
using
System.Web.Security;
7
using
System.Web.UI;
8
using
System.Web.UI.HtmlControls;
9
using
System.Web.UI.WebControls;
10
using
System.Web.UI.WebControls.WebParts;
11
using
System.Xml.Linq;
12
13
namespace
Test.WebControls.GridView.MyTemplateColumn
14
{
15
///
<summary>
16
///
控件类型
17
///
</summary>
18
public
enum
ControlTypeEnum
19
{
20
Label,
21
22
TextBox,
23
24
LinkButton,
25
26
DropDownList,
27
28
Button,
29
30
CheckBox,
31
32
RadioButton
33
}
34
35
///
<summary>
36
///
37
///
</summary>
38
public
class
ControlField
39
{
40
///
<summary>
41
///
服务器控件类型
42
///
</summary>
43
public
ControlTypeEnum ControlType
44
{
45
get
;
46
set
;
47
}
48
49
///
<summary>
50
///
服务器控件对象
51
///
</summary>
52
public
System.Web.UI.Control UIControl
53
{
54
get
;
55
set
;
56
}
57
58
///
<summary>
59
///
<服务器控件属性名称， 属性绑定数据字段>
60
///
</summary>
61
public
System.Collections.Generic.Dictionary
<
string
,
string
>
Fields
62
{
63
get
;
64
set
;
65
}
66
67
public
ControlField(ControlTypeEnum controlType, System.Web.UI.Control control, System.Collections.Generic.Dictionary
<
string
,
string
>
fileds)
68
{
69
this
.ControlType
=
controlType;
70
this
.UIControl
=
control;
71
this
.Fields
=
fileds;
72
}
73
}
74
}
75
3、 动态添加模板列的代码
动态添加模板列的代码
1
using
System;
2
using
System.Collections;
3
using
System.Configuration;
4
using
System.Data;
5
using
System.Linq;
6
using
System.Web;
7
using
System.Web.Security;
8
using
System.Web.UI;
9
using
System.Web.UI.HtmlControls;
10
using
System.Web.UI.WebControls;
11
using
System.Web.UI.WebControls.WebParts;
12
using
System.Xml.Linq;
13
14
namespace
Test.WebControls.GridView.MyTemplateColumn
15
{
16
public
partial
class
test01 : System.Web.UI.Page
17
{
18
protected
override
void
OnInit(EventArgs e)
19
{
20
this
.GeneralCols();
21
base
.OnInit(e);
22
}
23
24
protected
void
Page_Load(
object
sender, EventArgs e)
25
{
26
if
(
!
IsPostBack)
27
{
28
this
.Bind();
29
}
30
}
31
32
private
void
GeneralCols()
33
{
34
//
第1个模板列： Label
35
//
HeaderTemplate Row
36
System.Collections.Generic.Dictionary
<
string
, ControlField
>
controlFieldList1
=
new
System.Collections.Generic.Dictionary
<
string
, ControlField
>
();
37
TemplateField col1
=
new
TemplateField();
38
col1.ShowHeader
=
true
;
39
//
CheckBox
40
System.Web.UI.WebControls.CheckBox chk
=
new
CheckBox();
41
chk.ID
=
"
chk
"
;
42
//
43
System.Collections.Generic.Dictionary
<
string
,
string
>
fields0
=
new
System.Collections.Generic.Dictionary
<
string
,
string
>
();
44
fields0.Add(
"
Checked
"
,
"
isYes
"
);
45
//
46
ControlField controlField0
=
new
ControlField(ControlTypeEnum.CheckBox, chk, fields0);
47
controlFieldList1.Add(chk.ID, controlField0);
48
//
49
MyTmeplateColumn col1_headerow
=
new
MyTmeplateColumn(DataControlRowType.Header,
"
学生编号
"
, controlFieldList1);
50
col1.HeaderTemplate
=
col1_headerow;
51
52
//
ItemTemplate Row
53
System.Collections.Generic.Dictionary
<
string
, ControlField
>
controlFieldList2
=
new
System.Collections.Generic.Dictionary
<
string
, ControlField
>
();
54
//
55
System.Web.UI.WebControls.Label lblID
=
new
Label();
56
lblID.ID
=
"
lblID
"
;
57
//
58
System.Collections.Generic.Dictionary
<
string
,
string
>
fields2
=
new
System.Collections.Generic.Dictionary
<
string
,
string
>
();
59
fields2.Add(
"
Text
"
,
"
ID
"
);
60
//
61
ControlField controlField1
=
new
ControlField(ControlTypeEnum.Label, lblID, fields2);
62
controlFieldList2.Add(lblID.ID, controlField1);
63
//
64
//
TextBox
65
System.Web.UI.WebControls.TextBox txtName
=
new
TextBox();
66
txtName.ID
=
"
txtName
"
;
67
//
68
System.Collections.Generic.Dictionary
<
string
,
string
>
fields3
=
new
System.Collections.Generic.Dictionary
<
string
,
string
>
();
69
fields3.Add(
"
Text
"
,
"
Name
"
);
70
//
71
ControlField controlField2
=
new
ControlField(ControlTypeEnum.TextBox, txtName, fields3);
72
controlFieldList2.Add(txtName.ID, controlField2);
73
//
74
MyTmeplateColumn col1_itemrow
=
new
MyTmeplateColumn(DataControlRowType.DataRow,
"
学生编号
"
, controlFieldList2);
75
col1.ItemTemplate
=
col1_itemrow;
76
77
gvShow.Columns.Add(col1);
78
79
}
80
81
public
void
lbtn_Click(
object
sender, EventArgs e)
82
{
83
ClientScript.RegisterStartupScript(GetType(),
"
test
"
,
"
alert('ok');
"
,
true
);
84
}
85
86
87
private
void
Bind()
88
{
89
DataTable dt
=
new
DataTable();
90
dt.Columns.Add(
"
id
"
,
typeof
(
string
));
91
dt.Columns.Add(
"
name
"
,
typeof
(
string
));
92
dt.Columns.Add(
"
isyes
"
,
typeof
(
bool
));
93
dt.Columns.Add(
"
url
"
,
typeof
(
string
));
94
DataRow dr
=
dt.NewRow();
95
dr[
0
]
=
"
No123456
"
;
96
dr[
1
]
=
"
王晓巍
"
;
97
dr[
2
]
=
true
;
98
dr[
3
]
=
"
http://www.baidu.com
"
;
99
dt.Rows.Add(dr);
100
//
101
gvShow.AutoGenerateColumns
=
false
;
102
gvShow.HeaderStyle.BackColor
=
System.Drawing.Color.BlueViolet;
103
gvShow.HeaderStyle.ForeColor
=
System.Drawing.Color.FromName(
"
#FFFFFF
"
);
104
gvShow.HeaderStyle.Font.Name
=
"
华文行楷
"
;
105
gvShow.HeaderStyle.Font.Bold
=
true
;
106
gvShow.RowStyle.BackColor
=
System.Drawing.Color.ForestGreen;
107
gvShow.GridLines
=
GridLines.Both;
108
gvShow.CellPadding
=
3
;
109
gvShow.CellSpacing
=
0
;
110
gvShow.DataSource
=
dt;
111
gvShow.DataBind();
112
}
113
114
protected
void
btn_Click(
object
sender, EventArgs e)
115
{
116
Button btn
=
sender
as
Button;
117
if
(btn
!=
null
)
118
{
119
string
s
=
string
.Format(
"
刚才你单击控件{0}: btn.Text={1}
"
,btn.ID, btn.Text);
120
ClientScript.RegisterStartupScript(GetType(),
"
alert
"
,
"
alert('
"
+
s
+
"
')
"
,
true
);
121
}
122
}
123
}
124
}
125
4、动态添加模板列的效果图：
