自定义的GridView控件源代码

　　简单地扩展GridView控件的功能。扩展的功能有：当前页/共几页，首页上一页下一页末页 go[]ok
而且还能把gridview导入到excel中。

Code
1

namespace KFC
2

{
3

using System;
4

using System.ComponentModel;
5

using System.Drawing.Design;
6

using System.IO;
7

using System.Runtime.InteropServices;
8

using System.Web;
9

using System.Web.UI;
10

using System.Web.UI.HtmlControls;
11

using System.Web.UI.WebControls;
12

public class myGridView : GridView
14

{
15

protected void btnExport_Click(object sender, ImageClickEventArgs e)
16

{
17

ImageButton button = (ImageButton)sender;
18

GridView parent = (GridView)button.Parent.Parent.Parent.Parent;
19

HttpResponse response = this.Context.ApplicationInstance.Response;
20

if ((parent.Rows.Count + 1) < 0x10000)
21

{
22

parent.AllowPaging = false;
23

parent.DataBind();
24

StringWriter writer = new StringWriter();
25

HtmlTextWriter writer2 = new HtmlTextWriter(writer);
26

HtmlForm child = new HtmlForm();
27

response.Charset = "gb2312";
28

response.ContentEncoding = System.Text.Encoding.UTF8;
29

response.ContentType = "application/vnd.ms-word";
30

response.AddHeader("content-disposition", "attachment;filename=Report.doc");
31

this.EnableViewState = false;
34

this.Page.Controls.Add(child);
35

child.Controls.Add(parent);
36

this.ClearControls(parent);
37

child.RenderControl(writer2);
38

response.Write(writer.ToString());
39

response.End();
40

parent.AllowPaging = true;
41

parent.DataBind();
42

}
43

else
44

{
45

response.Write("记录数量过大，无法导出到Excel。");
46

}
47

}
48

protected void Button1_Click(object sender, EventArgs e)
50

{
51

Button button = (Button)sender;
52

myGridView parent = (myGridView)button.Parent.Parent.Parent.Parent;
53

HttpResponse response = this.Context.ApplicationInstance.Response;
54

response.Clear();
55

response.AddHeader("content-disposition", "attachment;filename=FileName.xls");
56

response.Charset = "gb2312";
57

response.ContentType = "application/vnd.xls";
58

StringWriter writer = new StringWriter();
59

HtmlTextWriter writer2 = new HtmlTextWriter(writer);
60

parent.AllowPaging = false;
61

parent.DataBind();
62

parent.RenderControl(writer2);
63

response.Write(writer.ToString());
64

response.End();
65

parent.AllowPaging = true;
66

parent.DataBind();
67

}
68

private void ClearControls(Control control)
70

{
71

for (int i = control.Controls.Count - 1; i >= 0; i--)
72

{
73

this.ClearControls(control.Controls[i]);
74

}
75

if ((control is ImageButton) || (control is Image))
76

{
77

control.Parent.Controls.Remove(control);
78

}
79

if (control is TableCell)
80

{
81

for (int j = 0; j < control.Controls.Count; j++)
82

{
83

LiteralControl control2;
84

if ((control.Controls[j] is ImageButton) || (control.Controls[j] is Image))
85

{
86

control.Controls.Remove(control.Controls[j]);
87

}
88

if (control.Controls[j] is CheckBox)
89

{
90

CheckBox box = (CheckBox) control.Controls[j];
91

control2 = new LiteralControl();
92

control2.Text = box.Checked ? "true" : "false";
93

control.Controls.Add(control2);
94

control.Controls.Remove(box);
95

}
96

else if (!(control.Controls[j] is Label) && !(control.Controls[j] is LiteralControl))
97

{
98

Control control3 = control.Controls[j];
99

if (control3.GetType().GetProperty("SelectedItem") != null)
100

{
101

control2 = new LiteralControl();
102

try
103

{
104

control2.Text = control3.GetType().GetProperty("SelectedItem").GetValue(control3, null).ToString();
105

}
106

catch (Exception)
107

{
108

}
109

control.Controls.Add(control2);
110

control.Controls.Remove(control3);
111

}
112

else if (control3.GetType().GetProperty("Text") != null)
113

{
114

control2 = new LiteralControl();
115

control2.Text = control3.GetType().GetProperty("Text").GetValue(control3, null).ToString();
116

control.Controls.Add(control2);
117

control.Controls.Remove(control3);
118

}
119

}
120

}
121

}
122

}
123

124

private void CustomizePageBar(GridViewRowEventArgs e)
125

{
126

127

Label label = new Label();
128

label.Text = (this.PageIndex + 1) + "/" + this.PageCount;
129

label.Font.Bold = true;
130

131

TableCell cell2 = new TableCell();
132

cell2.Width = Unit.Pixel(80);
133

cell2.Controls.Add(label);
134

135

/**//*
136

Label lbTotal = new Label();
137

lbTotal.Font.Bold = true;
138

int currentPageIndex = this.PageIndex;
139

this.PageIndex = this.PageCount - 1;
140

141

lbTotal.Text = "共"+(this.PageCount - 1) * this.PageSize + this.Rows.Count+"条记录";
142

143

this.PageIndex = currentPageIndex;
144

145

TableCell cellTotal = new TableCell();
146

cellTotal.Width = Unit.Pixel(120);
147

cellTotal.Controls.Add(lbTotal);
148

*/
149

150

151

152

LinkButton lbtnFirst = new LinkButton();
153

lbtnFirst.ID = "lbtnfirst";
154

lbtnFirst.Text = "首页";
155

lbtnFirst.Font.Bold = true;
156

lbtnFirst.Font.Size = base.PagerStyle.Font.Size;
157

lbtnFirst.Click += new EventHandler(this.Pagination);
158

lbtnFirst.CommandArgument = "First";
159

160

TableCell cellFirst = new TableCell();
161

cellFirst.Width = Unit.Pixel(70);
162

cellFirst.Controls.Add(lbtnFirst);
163

164

LinkButton lbtnPrev = new LinkButton();
165

lbtnPrev.ID = "lbtnprev";
166

lbtnPrev.Text = "上一页";
167

lbtnPrev.Font.Bold = true;
168

lbtnPrev.Font.Size = base.PagerStyle.Font.Size;
169

lbtnPrev.Click+=new EventHandler(this.Pagination);
170

lbtnPrev.CommandArgument = "Prev";
171

172

TableCell cellPrev = new TableCell();
173

cellPrev.Width = Unit.Pixel(70);
174

cellPrev.Controls.Add(lbtnPrev);
175

176

LinkButton lbtnNext = new LinkButton();
177

lbtnNext.ID = "lbtnnext";
178

lbtnNext.Text = "下一页";
179

lbtnNext.Font.Bold = true;
180

lbtnNext.Font.Size = base.PagerStyle.Font.Size;
181

lbtnNext.Click+=new EventHandler(this.Pagination);
182

lbtnNext.CommandArgument = "Next";
183

184

TableCell cellNext = new TableCell();
185

cellNext.Width = Unit.Pixel(70);
186

cellNext.Controls.Add(lbtnNext);
187

188

LinkButton lbtnLast = new LinkButton();
189

lbtnLast.ID = "lbtnLast";
190

lbtnLast.Text = "末页";
191

lbtnLast.Font.Bold = true;
192

lbtnLast.Font.Size = base.PagerStyle.Font.Size;
193

lbtnLast.Click+=new EventHandler(this.Pagination);
194

lbtnLast.CommandArgument = "Last";
195

196

TableCell cellLast = new TableCell();
197

cellLast.Width = Unit.Pixel(70);
198

cellLast.Controls.Add(lbtnLast);
199

200

//cellFirst.Controls.Add(lbtnFirst);
201

//cellFirst.Controls.Add(lbtnPrev);
202

//cellFirst.Controls.Add(lbtnNext);
203

//cellFirst.Controls.Add(lbtnLast);
204

205

206

207

Label label2 = new Label();
208

label2.Text = "go: ";
209

label2.ID = "lblGoTo";
210

label2.Font.Bold = true;
211

label2.Font.Size = base.PagerStyle.Font.Size;
212

213

TableCell cell3 = new TableCell();
214

//cell3.Width = Unit.Pixel(0x10);
215

216

cell3.Controls.Add(label2);
217

218

219

DropDownList list = new DropDownList();
220

list.ID = "ddlPick";
221

list.AutoPostBack = true;
222

list.EnableViewState = true;
223

list.Font.Size = base.PagerStyle.Font.Size;
224

225

for (int i = 1; i <= this.PageCount; i++)
226

{
227

list.Items.Add(i.ToString());
228

}
229

list.SelectedIndex = this.PageIndex;
230

list.SelectedIndexChanged += new EventHandler(this.OnPagePicked);
231

232

TextBox txtPage = new TextBox();
233

txtPage.Text = "";
234

txtPage.Width = Unit.Pixel(20);
235

txtPage.EnableViewState = true;
236

txtPage.Font.Size = base.PagerStyle.Font.Size;
237

238

239

TableCell cell4 = new TableCell();
240

//cell4.Width = Unit.Pixel(0x10);
241

242

243

Button btnOK = new Button();
244

btnOK.ID = "btnok";
245

btnOK.Text = "OK";
246

btnOK.Click+=new EventHandler(this.OnbtnOK_Click);
247

248

cell4.Controls.Add(txtPage);
249

cell4.Controls.Add(btnOK);
250

251

252

TableCell cell5 = new TableCell();
253

cell5.Width = Unit.Pixel(150);
254

255

foreach (Control control in e.Row.Cells[0].Controls)
256

{
257

cell5.Controls.Add(control);
258

}
259

260

Table child = new Table();//
261

child.BorderWidth = 0;
262

child.CellPadding = 0;
263

child.CellSpacing = 0;
264

child.Width = Unit.Percentage(100.0);
265

child.Height = Unit.Pixel(20);
266

267

child.Rows.Add(new TableRow());
268

269

child.Rows[0].Cells.Add(cell2);
270

271

//child.Rows[0].Cells.Add(cellTotal);
272

child.Rows[0].Cells.Add(cellFirst);
273

child.Rows[0].Cells.Add(cellPrev);
274

child.Rows[0].Cells.Add(cellNext);
275

child.Rows[0].Cells.Add(cellLast);
276

277

child.Rows[0].Cells.Add(cell5);
278

child.Rows[0].Cells.Add(cell3);
279

child.Rows[0].Cells.Add(cell4);
280

e.Row.Cells[0].Controls.Add(child);
281

}
282

283

protected void DisplaySortOrderImages(string sortExpression, GridViewRow dgItem)
284

{
285

string[] sortColumns = sortExpression.Split(",".ToCharArray());
286

for (int i = 0; i < dgItem.Cells.Count; i++)
287

{
288

if ((dgItem.Cells[i].Controls.Count > 0) && (dgItem.Cells[i].Controls[0] is LinkButton))
289

{
290

string str;
291

int num2;
292

string commandArgument = ((LinkButton)dgItem.Cells[i].Controls[0]).CommandArgument;
293

this.SearchSortExpression(sortColumns, commandArgument, out str, out num2);
294

if (num2 > 0)
295

{
296

string str3 = str.Equals("ASC") ? this.SortAscImageUrl : this.SortDescImageUrl;
297

if (str3 != string.Empty)
298

{
299

Image child = new Image();
300

child.ImageUrl = str3;
301

dgItem.Cells[i].Controls.Add(child);
302

Label label = new Label();
303

label.Font.Size = FontUnit.Small;
304

label.Text = num2.ToString();
305

dgItem.Cells[i].Controls.Add(label);
306

}
307

else
308

{
309

Label label2 = new Label();
310

label2.Font.Size = FontUnit.XSmall;
311

label2.Font.Name = "webdings";
312

label2.EnableTheming = false;
313

label2.Text = str.Equals("ASC") ? "5" : "6";
314

dgItem.Cells[i].Controls.Add(label2);
315

if (this.AllowMultiColumnSorting)
316

{
317

Literal literal = new Literal();
318

literal.Text = num2.ToString();
319

dgItem.Cells[i].Controls.Add(literal);
320

}
321

}
322

}
323

}
324

}
325

}
326

327

protected string GetSortExpression(GridViewSortEventArgs e)
328

{
329

string[] sortColumns = null;
330

string sortExpression = this.SortExpression;
331

if (sortExpression != string.Empty)
332

{
333

sortColumns = sortExpression.Split(",".ToCharArray());
334

}
335

if ((sortExpression.IndexOf(e.SortExpression) > 0) || sortExpression.StartsWith(e.SortExpression))
336

{
337

sortExpression = this.ModifySortExpression(sortColumns, e.SortExpression);
338

}
339

else
340

{
341

sortExpression = sortExpression + ("," + e.SortExpression + " ASC ");
342

}
343

return sortExpression.TrimStart(",".ToCharArray()).TrimEnd(",".ToCharArray());
344

}
345

346

protected void imgToggle_Click(object sender, ImageClickEventArgs e)
347

{
348

ImageButton button = (ImageButton)sender;
349

GridView parent = (GridView)button.Parent.Parent.Parent.Parent;
350

351

parent.AllowPaging = !parent.AllowPaging;
352

}
353

354

protected string ModifySortExpression(string[] sortColumns, string sortExpression)
355

{
356

string str = sortExpression + " ASC ";
357

string str2 = sortExpression + " DESC ";
358

for (int i = 0; i < sortColumns.Length; i++)
359

{
360

if (str.Equals(sortColumns[i]))
361

{
362

sortColumns[i] = str2;
363

}
364

else if (str2.Equals(sortColumns[i]))
365

{
366

Array.Clear(sortColumns, i, 1);
367

}
368

}
369

return string.Join(",", sortColumns).Replace(",,", ",").TrimStart(",".ToCharArray());
370

}
371

372

protected void OnPagePicked(object sender, EventArgs e)
373

{
374

DropDownList list = (DropDownList)sender;
375

this.PageIndex = Convert.ToInt32(list.SelectedItem.Value) - 1;
376

GridViewPageEventArgs args = new GridViewPageEventArgs(Convert.ToInt32(list.SelectedItem.Value) - 1);
377

this.OnPageIndexChanging(args);
378

}
379

380

protected void OnbtnOK_Click(object sender, EventArgs e)
381

{
382

383

//if (((Button)sender).Text.Trim() != "")
384

//{
385

386

// int intPageNo = Convert.ToInt32(((Button)sender).Text.Trim())-1;
387

// if (intPageNo > 0 && intPageNo < this.PageCount)
388

// {
389

// this.PageIndex = intPageNo;
390

// GridViewPageEventArgs args = new GridViewPageEventArgs(intPageNo);
391

// this.OnPageIndexChanging(args);
392

// }
393

//}
394

}
395

396

protected void Pagination(object sender, EventArgs e)
397

{
398

LinkButton lbtn = (LinkButton)sender;
399

string PageArgs = lbtn.CommandArgument;
400

switch (PageArgs)
401

{
402

case "First":
403

this.PageIndex = 0;
404

break;
405

case "Prev":
406

if (this.PageIndex > 0)
407

{
408

this.PageIndex = this.PageIndex - 1;
409

}
410

break;
411

case "Next":
412

if (this.PageIndex < this.PageCount - 1)
413

{
414

this.PageIndex = this.PageIndex + 1;
415

}
416

break;
417

case "Last":
418

this.PageIndex = this.PageCount - 1;
419

break;
420

}
421

GridViewPageEventArgs args = new GridViewPageEventArgs(this.PageIndex);
422

this.OnPageIndexChanging(args);
423

424

425

}
426

427

protected override void OnRowCreated(GridViewRowEventArgs e)
428

{
429

GridViewRow row;
430

if (e.Row.RowType == DataControlRowType.Header)
431

{
432

if (this.AllowPagingToggle)
433

{
434

ImageButton child = new ImageButton();
435

child.AlternateText = "toggle";
436

child.ImageUrl = "~/images/toggle.gif";
437

child.Click += new ImageClickEventHandler(this.imgToggle_Click);
438

Image image = new Image();
439

image.ImageUrl = "~/images/spacer.gif";
440

image.Width = 10;
441

ImageButton button2 = new ImageButton();
442

button2.AlternateText = "excel";
443

button2.ImageUrl = "~/images/excel.gif";
444

button2.Click += new ImageClickEventHandler(this.btnExport_Click);
445

row = e.Row;
446

row.Cells[0].Controls.Add(child);
447

row.Cells[0].Controls.Add(image);
448

row.Cells[0].Controls.Add(button2);
449

}
450

if (this.SortExpression != string.Empty)
451

{
452

this.DisplaySortOrderImages(this.SortExpression, e.Row);
453

}
454

}
455

else if (e.Row.RowType == DataControlRowType.DataRow)
456

{
457

row = e.Row;
458

bool flag = (row.RowIndex % 2) == 0;
459

row.Attributes["onmouseover"] = "HandleOver( this );";
460

row.Attributes["onmouseout"] = "HandleOut( this );";
461

}
462

else if (e.Row.RowType == DataControlRowType.Pager)
463

{
464

this.CustomizePageBar(e);
465

}
466

base.OnRowCreated(e);
467

}
468

469

protected override void OnRowDataBound(GridViewRowEventArgs e)
470

{
471

if (e.Row.RowType == DataControlRowType.DataRow)
472

{
473

GridViewRow row = e.Row;
474

for (int i = 0; i < row.Cells.Count; i++)
475

{
476

if (!string.IsNullOrEmpty(row.Cells[i].Text) && char.IsNumber(row.Cells[i].Text[0]))
477

{
478

row.Cells[i].Attributes.Add("style", "vnd.ms-excel.numberformat:@");
479

}
480

}
481

}
482

base.OnRowDataBound(e);
483

}
484

485

protected override void OnSorting(GridViewSortEventArgs e)
486

{
487

if (this.AllowMultiColumnSorting)
488

{
489

e.SortExpression = this.GetSortExpression(e);
490

}
491

base.OnSorting(e);
492

}
493

494

protected void SearchSortExpression(string[] sortColumns, string sortColumn, out string sortOrder, out int sortOrderNo)
495

{
496

sortOrder = "";
497

sortOrderNo = -1;
498

for (int i = 0; i < sortColumns.Length; i++)
499

{
500

if (sortColumns[i].StartsWith(sortColumn))
501

{
502

sortOrderNo = i + 1;
503

if (this.AllowMultiColumnSorting)
504

{
505

sortOrder = sortColumns[i].Substring(sortColumn.Length).Trim();
506

}
507

else
508

{
509

sortOrder = (this.SortDirection == SortDirection.Ascending) ? "ASC" : "DESC";
510

}
511

}
512

}
513

}
514

515

[ DefaultValue("false"),Description("Whether Sorting On more than one column is enabled"), Category("Behavior")]
516

public bool AllowMultiColumnSorting
517

{
518

get
519

{
520

object obj2 = this.ViewState["EnableMultiColumnSorting"];
521

return ((obj2 != null) ? ((bool)obj2) : false);
522

}
523

set
524

{
525

this.AllowSorting = true;
526

this.ViewState["EnableMultiColumnSorting"] = value;
527

}
528

}
529

530

[DefaultValue("true"), Description("Whether Paging Toggle is enabled"), Category("Behavior")]
531

public bool AllowPagingToggle
532

{
533

get
534

{
535

object obj2 = this.ViewState["AllowPagingToggle"];
536

return ((obj2 != null) ? ((bool)obj2) : false);
537

}
538

set
539

{
540

this.ViewState["AllowPagingToggle"] = value;
541

}
542

}
543

544

[DefaultValue(""), Editor("System.Web.UI.Design.UrlEditor", typeof(UITypeEditor)), Description("Image to display for Ascending Sort"), Category("Misc")]
545

public string SortAscImageUrl
546

{
547

get
548

{
549

object obj2 = this.ViewState["SortImageAsc"];
550

return ((obj2 != null) ? obj2.ToString() : "");
551

}
552

set
553

{
554

this.ViewState["SortImageAsc"] = value;
555

}
556

}
557

558

[DefaultValue(""), Editor("System.Web.UI.Design.UrlEditor", typeof(UITypeEditor)), Description("Image to display for Descending Sort"), Category("Misc")]
559

public string SortDescImageUrl
560

{
561

get
562

{
563

object obj2 = this.ViewState["SortImageDesc"];
564

return ((obj2 != null) ? obj2.ToString() : "");
565

}
566

set
567

{
568

this.ViewState["SortImageDesc"] = value;
569

}
570

}
571

}
572

}

转载于:https://www.cnblogs.com/shajianheng/archive/2008/12/24/1361190.html

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