1 #region 滚动鼠标滚轮实现鼠标缩放

2 /* ***********************************************************

3 * 滚动鼠标滚轮实现鼠标缩放

4 *********************************************************** */

5 private void picView_MouseWheel( object sender, MouseEventArgs e)

6 {

7 switch (keyAction)

8 {

9 case 1 :

10 if (e.Delta > 0 && picView.Width < 10000 )

11 {

12 zoom(e.Location, 1100 );

13 }

14 else if (e.Delta < 0 && picView.Image.Width / picView.Width < 5 )

15 {

16 zoom(e.Location, 900 );

17 }

18 CenterImage(); // 使图片居中显示

19   break ;

20 case 2 :

21 if (hScrollBarImageView.Visible)

22 hScrollBarImageView.Value = (hScrollBarImageView.Value - e.Delta < 0 ? 0 : (hScrollBarImageView.Value - e.Delta > hScrollBarImageView.Maximum ? hScrollBarImageView.Maximum : hScrollBarImageView.Value - e.Delta));

23 break ;

24 default :

25 if (vScrollBarImageView.Visible)

26 vScrollBarImageView.Value = (vScrollBarImageView.Value - e.Delta < 0 ? 0 : (vScrollBarImageView.Value - e.Delta > vScrollBarImageView.Maximum ? vScrollBarImageView.Maximum : vScrollBarImageView.Value - e.Delta));

27 break ;

28 }

29 }

30 #endregion

1 #region 版权信息

2 /* ---------------------------------------------------------------------*

3 // Copyright (C) 2010 http://www.cnblogs.com/huyong

4 // 版权所有。

5 // 项目 名称：《Winform通用控件库》

6 // 文 件 名： UcImageView.cs

7 // 类 全 名： DotNet.Controls.UcImageView

8 // 描 述: 图像显示控件

9 // 创建 时间： 2010-08-05

10 // 创建人信息： [**** 姓名:胡勇 QQ:80368704 E-Mail:80368704@qq.com *****]

11 *---------------------------------------------------------------------- */

12 #endregion

13

14 using System;

15 using System.ComponentModel;

16 using System.Drawing;

17 using System.Windows.Forms;

18 using System.Drawing.Printing;

19 using DotNet.Common;

20

21 namespace DotNet.Controls

22 {

23 /// <summary>

24 /// 图像显示控件

25 /// UcImageView

26 ///

27 /// 修改纪录

28 /// 2010-11-6 胡勇 优化相关代码。

29 /// 2010-8-5 胡勇 创建图像显示控件

30 ///

31 /// <author>

32 /// <name> 胡勇 </name>

33 /// <QQ> 80368704 </QQ>

34 /// <Email> 80368704@qq.com </Email>

35 /// </author>

36 /// </summary>

37 public partial class UcImageView : UserControl

38 {

39 #region 构造函数

40 public UcImageView()

41 {

42 InitializeComponent();

43 // 记录PnlMain的size

44 panelOldSize.X = PnlMain.Width;

45 panelOldSize.Y = PnlMain.Height;

46 }

47 #endregion

48

49 #region 公共变量

50 private Point StartP = new Point( 0 , 0 );

51 private bool isMouseDown = false ;

52 private Point panelOldSize = new Point( 0 , 0 );

53 private int imgIndexBy1000 = 0 ;

54 private int keyAction = 0 ;

55 private int w, h;

56 #endregion

57

58 #region 公共事件

59

60 [Category( " 图片浏览 " ), Description( " 移动或漫游图片的Checked事件Changed时发生。 " ), Browsable( true )]

61 public event EventHandler OnMnuMoveImageCheckedChanged;

62

63 #endregion

64

65 #region 公共方法

66

67 #region 增加图片到PictureBox:void AddImage(string fileName, bool isAsync)

68 /// <summary>

69 /// 增加要显示的图片

70 /// </summary>

71 /// <param name="fileName"> 图片路径全名 </param>

72 /// <param name="isAsync"> true:异步方式加载图片 </param>

73 public void AddImage( string fileName, bool isAsync)

74 {

75 if (isAsync) // 异步加载图片

76 {

77 // 图片异步加载完成后的处理事件

78 picView.LoadCompleted += new AsyncCompletedEventHandler(picView_LoadCompleted);

79 // 图片加裁时，显示等待光标

80 picView.UseWaitCursor = true ;

81 // 采用异步加裁方式

82 picView.WaitOnLoad = false ;

83 // 开始异步加裁图片

84 picView.LoadAsync(fileName);

85 }

86 else

87 {

88 picView.Image = Image.FromFile(fileName); // 载入图片

89 }

90

91 InitialImage();

92

93 }

94

95 /// <summary>

96 /// 增加要显示的图片

97 /// </summary>

98 /// <param name="img"> Image </param>

99 public void AddImage(Image img)

100 {

101 if (img != null )

102 {

103 picView.Image = img;

104 InitialImage();

105 }

106 else

107 {

108 picView = null ;

109 }

110 }

111 #endregion

112

113 #region 得到ImageView中的图片:Image GetImageInImageView()

114 /// <summary>

115 /// 得到ImageView中的图片

116 /// </summary>

117 /// <returns> Image </returns>

118 public Image GetImageInImageView()

119 {

120 if (picView.Image != null )

121 {

122 return picView.Image;

123 }

124 else

125 {

126 return null ;

127 }

128 }

129 #endregion

130

131 #region 放大、缩小、适应图片大小、移动图片、左旋转图片与右旋转图片

132 /// <summary>

133 /// 放大图片

134 /// </summary>

135 public void ZoomInImage()

136 {

137 if (picView.Image != null )

138 {

139 if (picView.Width < 5000 )

140 {

141 zoom(picView.Location, 1100 );

142 CenterImage();

143 }

144 else

145 {

146 MessageBox.Show( " 对不起，不能再进行放大! " , " 提示信息 " ,MessageBoxButtons.OK,MessageBoxIcon.Information);

147 }

148 }

149 }

150

151 /// <summary>

152 /// 缩小图片

153 /// </summary>

154 public void ZoomOutImage()

155 {

156 if (picView.Image != null )

157 {

158 if (picView.Image.Width / picView.Width < 5 && - 7 < 0 )

159 {

160 zoom(picView.Location, 900 );

161 CenterImage();

162 }

163 else

164 {

165 MessageBox.Show( " 对不起，不能再进行缩小! " , " 提示信息 " , MessageBoxButtons.OK, MessageBoxIcon.Information);

166 }

167 }

168 }

169

170 /// <summary>

171 /// 适应图片大小

172 /// </summary>

173 public void FitImageSize()

174 {

175 if (picView.Image != null )

176 {

177 float r1 = ( float ) this .w / this .picView.Width;

178 float r2 = ( float ) this .h / this .picView.Height;

179 this .picView.Scale(r1, r2);

180 this .picView.Left = ( this .PnlMain.Width - this .picView.Width) / 2 ;

181 this .picView.Top = ( this .PnlMain.Height - this .picView.Height) / 2 ;

182 this .picView.Cursor = Cursors.Default;

183 CenterImage();

184 }

185 }

186

187 /// <summary>

188 /// 移动图片

189 /// </summary>

190 public void MoveImage()

191 {

192 mnuMy.Checked = MnuMoveImageChecked;

193 }

194

195 /// <summary>

196 /// 左旋转图片

197 /// </summary>

198 public void LeftRotateImage()

199 {

200 if (picView.Image != null )

201 {

202 picView.Image.RotateFlip(RotateFlipType.Rotate90FlipX);

203 picView.Refresh();

204 CenterImage();

205 }

206 }

207

208 /// <summary>

209 /// 右旋转图片

210 /// </summary>

211 public void RightRotateImage()

212 {

213 if (picView.Image != null )

214 {

215 picView.Image.RotateFlip(RotateFlipType.Rotate90FlipY);

216 picView.Refresh();

217 CenterImage();

218 }

219 }

220 #endregion

221

222 #endregion

223

224 #region 公共属性

225 private bool _mnuMoveImageChecked;

226 /// <summary>

227 /// 确定漫游菜单项是否处于选中状态(用于是否可以移动或漫游图片)

228 /// </summary>

229 [Category( " 图片浏览 " ), Description( " 确定漫游菜单项是否处于选中状态(用于是否可以移动或漫游图片) " ),Browsable( false )]

230 public bool MnuMoveImageChecked

231 {

232 get

233 {

234 return _mnuMoveImageChecked;

235 }

236 set

237 {

238 _mnuMoveImageChecked = value;

239 this .mnuMy.Checked = _mnuMoveImageChecked;

240 }

241 }

242

243 private bool _mnuPrintVisible = true ; // 默认可见

244 /// <summary>

245 /// 确定打印菜单项是可见还是隐藏

246 /// </summary>

247 [Category( " 图片浏览 " ), Description( " 确定打印菜单项是可见还是隐藏 " ), Browsable( true )]

248 public bool MnuPrintVisible

249 {

250 get

251 {

252 return _mnuPrintVisible;

253 }

254 set

255 {

256 _mnuPrintVisible = value;

257 this .mnuPrint.Visible = _mnuPrintVisible;

258 }

259 }

260 #endregion

261

262 #region 私有方法

263

264 private void picView_LoadCompleted( object sender, AsyncCompletedEventArgs e)

265 {

266 // 图片加载完成后，将光标恢复

267 picView.UseWaitCursor = false ;

268 }

269

270 #region 图片缩放

271 /// <summary>

272 /// 图片缩放

273 /// </summary>

274 /// <param name="center"> 缩放中心点 </param>

275 /// <param name="zoomIndexBy1000"> 缩放倍率的1000倍 </param>

276 private void zoom(Point center, int zoomIndexBy1000)

277 {

278 // 记录原始的picView的Size

279 Point oldSize = new Point(picView.Width, picView.Height);

280 // 实施放大（以x方向为基准计算得出y方向大小，防止多次运算误差积累使Image和picView的尺寸不匹配）

281 picView.Width = picView.Width * zoomIndexBy1000 / 1000 ;

282 picView.Height = picView.Width * imgIndexBy1000 / 1000 ;

283 // 重新定位标定后的picView位置

284 picView.Left -= ((picView.Width - oldSize.X) * (center.X * 1000 / oldSize.X)) / 1000 ;

285 picView.Top -= ((picView.Height - oldSize.Y) * (center.Y * 1000 / oldSize.Y)) / 1000 ;

286 // 重新设定横向滚动条最大值和位置

287 if (picView.Width - PnlMain.Width > 0 )

288 {

289 hScrollBarImageView.Visible = true ;

290 hScrollBarImageView.Maximum = picView.Width - PnlMain.Width + vScrollBarImageView.Width + 2 ;

291 hScrollBarImageView.Value = (picView.Left >= 0 ? 0 : ( - picView.Left > hScrollBarImageView.Maximum ? hScrollBarImageView.Maximum : - picView.Left));

292 }

293 else

294 {

295 hScrollBarImageView.Visible = false ;

296 }

297 // 重新设定纵向滚动条最大值和位置

298 if (picView.Height - PnlMain.Height > 0 )

299 {

300 vScrollBarImageView.Visible = true ;

301 vScrollBarImageView.Maximum = picView.Height - PnlMain.Height + hScrollBarImageView.Width + 2 ;

302 vScrollBarImageView.Value = (picView.Top >= 0 ? 0 : ( - picView.Top > vScrollBarImageView.Maximum ? vScrollBarImageView.Maximum : - picView.Top));

303 }

304 else

305 {

306 vScrollBarImageView.Visible = false ;

307 }

308 }

309 #endregion

310

311 #region 图片加裁到PictureBox中后，对其进行初始化操作

312 /// <summary>

313 /// 图片加裁到PictureBox中后，对其进行初始化操作

314 /// </summary>

315 private void InitialImage()

316 {

317 ImageChange(); // 得到最适合显示的图片尺寸

318 this .w = this .picView.Width;

319 this .h = this .picView.Height;

320

321 // 设定图片位置

322 picView.Location = new Point( 0 , 0 );

323 // 设定图片初始尺寸

324 picView.Size = picView.Image.Size;

325 // 设定图片纵横比

326 imgIndexBy1000 = (picView.Image.Height * 1000 ) / picView.Image.Width;

327 // 设定滚动条

328 if (picView.Width - PnlMain.Width > 0 )

329 {

330 hScrollBarImageView.Maximum = picView.Width - PnlMain.Width + vScrollBarImageView.Width + 2 ; // + hScrollBarImageView.LargeChange

331 hScrollBarImageView.Visible = true ;

332 }

333 if (picView.Height - PnlMain.Height > 0 )

334 {

335 vScrollBarImageView.Maximum = picView.Height - PnlMain.Height + hScrollBarImageView.Height + 2 ; // + vScrollBarImageView.LargeChange

336 vScrollBarImageView.Visible = true ;

337 }

338 CenterImage();

339 }

340 #endregion

341

342 #region 居中与全屏显示图片

343

344 /// <summary>

345 /// 使图片全屏显示

346 /// </summary>

347 private void FullImage()

348 {

349 if (picView.Image.Width < picView.Width && picView.Image.Height < picView.Height)

350 {

351 picView.SizeMode = PictureBoxSizeMode.CenterImage;

352 }

353 CalculateAspectRatioAndSetDimensions();

354 }

355

356

357 /// <summary>

358 /// 保持图片居中显示

359 /// </summary>

360 private void CenterImage()

361 {

362 picView.Left = PnlMain.Width / 2 - picView.Width / 2 ;

363 picView.Top = PnlMain.Height / 2 - picView.Height / 2 ;

364 }

365

366 #endregion

367

368 #region CalculateAspectRatioAndSetDimensions

369 /// <summary>

370 /// CalculateAspectRatioAndSetDimensions

371 /// </summary>

372 /// <returns> double </returns>

373 private double CalculateAspectRatioAndSetDimensions()

374 {

375 double ratio;

376 if (picView.Image.Width > picView.Image.Height)

377 {

378 ratio = picView.Image.Width / picView.Image.Height;

379 picView.Height = Convert.ToInt16( double .Parse(picView.Width.ToString()) / ratio);

380 }

381 else

382 {

383 ratio = picView.Image.Height / picView.Image.Width;

384 picView.Width = Convert.ToInt16( double .Parse(picView.Height.ToString()) / ratio);

385 }

386 return ratio;

387 }

388 #endregion

389

390 #region 用于适应图片大小

391 /// <summary>

392 /// 用于适应图片大小

393 /// </summary>

394 private void ImageChange()

395 {

396 this .picView.Height = this .picView.Image.Height;

397 this .picView.Width = this .picView.Image.Width;

398 float cx = 1 ;

399 if ( this .picView.Image.Height > this .PnlMain.Height) cx =

400 ( float )( this .PnlMain.Height - 10 ) / ( float ) this .picView.Image.Height;

401

402 this .picView.Scale(cx);

403 this .picView.Left = ( this .PnlMain.Width - this .picView.Width) / 2 ;

404 this .picView.Top = ( this .PnlMain.Height - this .picView.Height) / 2 ;

405 }

406 #endregion

407

408 #endregion

409

410 #region 窗口（PnlMain）尺寸改变时图像的显示位置控制

411 /* ***********************************************************

412 * 窗口（PnlMain）尺寸改变时图像的显示位置控制

413 *********************************************************** */

414 private void PnlMain_Resize( object sender, EventArgs e)

415 {

416 // 对左右的方向操作（左右）

417 if (picView.Width <= PnlMain.Width) // 图片左右居中

418 {

419 picView.Left = (PnlMain.Width - picView.Width) / 2 ;

420 hScrollBarImageView.Visible = false ;

421 }

422 else if (picView.Left < 0 && picView.Width + picView.Left < PnlMain.Width) // 图片靠右

423 {

424 picView.Left = PnlMain.Width - picView.Width;

425 hScrollBarImageView.Visible = true ;

426 }

427 else if (picView.Left > 0 && picView.Width + picView.Left > PnlMain.Width) // 图片靠左

428 {

429 picView.Left = 0 ;

430 hScrollBarImageView.Visible = true ;

431 }

432 else // 保证显示的中心图样不变（左右）

433 {

434 picView.Left += (PnlMain.Width - panelOldSize.X) / 2 ;

435 hScrollBarImageView.Visible = true ;

436 }

437 // 设定横向滚动条最大值

438 hScrollBarImageView.Maximum = (picView.Width - PnlMain.Width > 0 ? picView.Width - PnlMain.Width + hScrollBarImageView.Maximum + 2 : 0 );

439 // 设定横向滚动条Value

440 hScrollBarImageView.Value = (picView.Left >= 0 ? 0 : - picView.Left);

441 // 重置旧的pannel1的Width

442 panelOldSize.X = PnlMain.Width;

443

444 // 对上下的方向操作（上下）

445 if (picView.Height <= PnlMain.Height) // 图片上下居中

446 {

447 picView.Top = (PnlMain.Height - picView.Height) / 2 ;

448 vScrollBarImageView.Visible = false ;

449 }

450 else if (picView.Top < 0 && picView.Height + picView.Top < PnlMain.Height) // 图片靠下

451 {

452 picView.Top = PnlMain.Height - picView.Height;

453 vScrollBarImageView.Visible = true ;

454 }

455 else if (picView.Top > 0 && picView.Height + picView.Top > PnlMain.Height) // 图片靠上

456 {

457 picView.Top = 0 ;

458 vScrollBarImageView.Visible = true ;

459 }

460 else // 保证显示的中心图样不变（上下）

461 {

462 picView.Top += (PnlMain.Height - panelOldSize.Y) / 2 ;

463 vScrollBarImageView.Visible = true ;

464 }

465 // 设定纵向滚动条最大值

466 vScrollBarImageView.Maximum = (picView.Height - PnlMain.Height > 0 ? picView.Height - PnlMain.Height + vScrollBarImageView.Maximum + 2 : 0 );

467 // 设定纵向滚动条Value

468 vScrollBarImageView.Value = (picView.Top >= 0 ? 0 : - picView.Top);

469 // 重置旧的pannel1的Height

470 panelOldSize.Y = PnlMain.Height;

471 }

472 #endregion

473

474 #region 滚动条滚动时，图片移动

475 /* ***********************************************************

476 * 滚动条滚动时，图片移动

477 *********************************************************** */

478 private void vScrollBarImageView_ValueChanged( object sender, EventArgs e)

479 {

480 picView.Top = - vScrollBarImageView.Value;

481 }

482

483 private void hScrollBarImageView_ValueChanged( object sender, EventArgs e)

484 {

485 picView.Left = - hScrollBarImageView.Value;

486 }

487 #endregion

488

489 #region PictureBox 鼠标按下、鼠标进入、松开与移动事件

490 private void picView_MouseDown( object sender, MouseEventArgs e)

491 {

492 StartP = e.Location;

493 isMouseDown = true ;

494 }

495

496 private void picView_MouseEnter( object sender, EventArgs e)

497 {

498 picView.Focus();

499 }

500

501 private void picView_MouseMove( object sender, MouseEventArgs e)

502 {

503 if (mnuMy.Checked && isMouseDown)

504 {

505 this .picView.Cursor = Cursors.SizeAll;

506 // 计算出移动后两个滚动条应该的Value

507 int x = - picView.Left + StartP.X - e.X;

508 int y = - picView.Top + StartP.Y - e.Y;

509

510 // 如果滚动条的value有效则执行操作；

511 if (x >= - PnlMain.Width + 10 && x <= picView.Width - 10 )

512 {

513 if (hScrollBarImageView.Visible)

514 {

515 if (x > 0 )

516 hScrollBarImageView.Value = x > hScrollBarImageView.Maximum ? hScrollBarImageView.Maximum : x;

517 picView.Left = - x - (vScrollBarImageView.Visible && x < 0 ? vScrollBarImageView.Width : 0 );

518 }

519 else

520 picView.Left = - x;

521 }

522

523 if (y >= - PnlMain.Height + 10 && y <= picView.Height - 10 )

524 {

525 if (vScrollBarImageView.Visible)

526 {

527 if (y > 0 )

528 vScrollBarImageView.Value = y > vScrollBarImageView.Maximum ? vScrollBarImageView.Maximum : y;

529 picView.Top = - y - (hScrollBarImageView.Visible && y < 0 ? hScrollBarImageView.Height : 0 );

530 }

531 else

532 picView.Top = - y;

533 }

534

535

536 /* ****************************************************

537 * 给予调整滚动条调整图片位置

538 *****************************************************

539 计算出移动后两个滚动条应该的Value */

540 /* int w = hScrollBarImageView.Value + StartP.X -e.X;

541 int z = vScrollBarImageView.Value + StartP.Y -e.Y;

542 如果滚动条的value有效则执行操作；

543 否则将滚动条按不同情况拉到两头

544 if (w >= 0 && w <= hScrollBarImageView.Maximum)

545 {

546 hScrollBarImageView.Value = w;

547 }

548 else

549 {

550 hScrollBarImageView.Value = (w < 0 ? 0 : hScrollBarImageView.Maximum);

551 }

552 if (z >= 0 && z <= vScrollBarImageView.Maximum)

553 {

554 vScrollBarImageView.Value = z;

555 }

556 else

557 {

558 vScrollBarImageView.Value = (z < 0 ? 0 : vScrollBarImageView.Maximum);

559 } */

560 }

561 else

562 {

563 this .picView.Cursor = Cursors.Default;

564 }

565 }

566

567 private void picView_MouseUp( object sender, MouseEventArgs e)

568 {

569 isMouseDown = false ;

570 }

571 #endregion

572

573 #region 滚动鼠标滚轮实现鼠标缩放

574 /* ***********************************************************

575 * 滚动鼠标滚轮实现鼠标缩放

576 *********************************************************** */

577 private void picView_MouseWheel( object sender, MouseEventArgs e)

578 {

579 switch (keyAction)

580 {

581 case 1 :

582 if (e.Delta > 0 && picView.Width < 10000 )

583 {

584 zoom(e.Location, 1100 );

585 }

586 else if (e.Delta < 0 && picView.Image.Width / picView.Width < 5 )

587 {

588 zoom(e.Location, 900 );

589 }

590 CenterImage(); // 使图片居中显示

591 break ;

592 case 2 :

593 if (hScrollBarImageView.Visible)

594 hScrollBarImageView.Value = (hScrollBarImageView.Value - e.Delta < 0 ? 0 : (hScrollBarImageView.Value - e.Delta > hScrollBarImageView.Maximum ? hScrollBarImageView.Maximum : hScrollBarImageView.Value - e.Delta));

595 break ;

596 default :

597 if (vScrollBarImageView.Visible)

598 vScrollBarImageView.Value = (vScrollBarImageView.Value - e.Delta < 0 ? 0 : (vScrollBarImageView.Value - e.Delta > vScrollBarImageView.Maximum ? vScrollBarImageView.Maximum : vScrollBarImageView.Value - e.Delta));

599 break ;

600 }

601 }

602 #endregion

603

604 #region 窗体按键事件处理

605

606 private void UcImageView_KeyDown( object sender, KeyEventArgs e)

607 {

608 if (e.Control)

609 keyAction = 1 ;

610 else if (e.Shift)

611 keyAction = 2 ;

612 }

613

614 private void UcImageView_KeyUp( object sender, KeyEventArgs e)

615 {

616 keyAction = 0 ;

617 }

618

619 private void picView_KeyDown( object sender, KeyEventArgs e)

620 {

621 if (e.Control)

622 keyAction = 1 ;

623 else if (e.Shift)

624 keyAction = 2 ;

625 else

626 keyAction = 3 ;

627 }

628 private void picView_KeyUp( object sender, KeyEventArgs e)

629 {

630 keyAction = 0 ;

631 }

632 #endregion

633

634 #region 快捷菜单事件代码

635 // 放大图片

636 private void mnuZoomIn_Click( object sender, EventArgs e)

637 {

638 this .ZoomInImage();

639 }

640

641 // 缩小图片

642 private void mnuZoomOut_Click( object sender, EventArgs e)

643 {

644 this .ZoomOutImage();

645 }

646

647 // 适应图片大小

648 private void mnuFitSize_Click( object sender, EventArgs e)

649 {

650 this .FitImageSize();

651 }

652

653 // 漫游图片

654 private void mnuMy_Click( object sender, EventArgs e)

655 {

656 MnuMoveImageChecked = ! mnuMy.Checked;

657 this .MoveImage();

658 }

659

660 // 左旋转图片

661 private void mnuLeftRotate_Click( object sender, EventArgs e)

662 {

663 this .LeftRotateImage();

664 }

665

666 // 右旋转图片

667 private void mnuRightRotate_Click( object sender, EventArgs e)

668 {

669 this .RightRotateImage();

670 }

671

672 #region 打印图片

673 // 打印图片

674 private void mnuPrint_Click( object sender, EventArgs e)

675 {

676 if (picView.Image != null )

677 {

678 PrintDialog printDgImageView = new PrintDialog();

679

680 /* 设置纸张类型

681 PaperSize pg = new PaperSize("A3",297,420);

682 printDocImageView.DefaultPageSettings.PaperSize = pg; */

683 PaperSize pg = new PaperSize( " A3 " , 23 , 33 );

684 printDgImageView.Document = printDocImageView;

685 if (printDgImageView.ShowDialog() == DialogResult.OK)

686 {

687 try

688 {

689 printDocImageView.Print();

690 }

691 catch

692 {

693 // 停止打印

694 printDocImageView.PrintController.OnEndPrint(printDocImageView, new System.Drawing.Printing.PrintEventArgs());

695 }

696 }

697 }

698 else

699 {

700 DialogHelper.ShowWarningMsg( " 对不起，没有要打印的数据! " );

701 }

702 }

703

704 private void printDocImageView_PrintPage( object sender, PrintPageEventArgs e)

705 {

706 this .FitImageSize(); // 实际尺寸

707 if (picView.Image != null )

708 {

709 e.Graphics.DrawImage(picView.Image, picView.Location.X, picView.Location.Y, picView.Width, picView.Height);

710 }

711 }

712 #endregion

713

714 #endregion

715

716 #region 窗体事件

717 private void mnuMy_CheckedChanged( object sender, EventArgs e)

718 {

719 if (OnMnuMoveImageCheckedChanged != null )

720 {

721 MnuMoveImageChecked = this .mnuMy.Checked;

722 OnMnuMoveImageCheckedChanged(sender, EventArgs.Empty);

723 }

724 }

725 #endregion

726 }

727 }