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c# winform 打印類

using System;
2

using System.Text;
4

using System.Collections;
6

using System.Collections.Generic;
8

using System.Drawing;
10

using System.Drawing.Printing;
12

using System.Data;
14

using System.Windows.Forms;
16

namespace EtaocnCS
18

{
19

public class DataGridViewPrinter
20

{
21

private DataGridView TheDataGridView; // The DataGridView Control which will be printed
22

private PrintDocument ThePrintDocument; // The PrintDocument to be used for printing
24

private bool IsCenterOnPage; // Determine if the report will be printed in the Top-Center of the page
26

private bool IsWithTitle; // Determine if the page contain title text
28

private string TheTitleText; // The title text to be printed in each page (if IsWithTitle is set to true)
30

private Font TheTitleFont; // The font to be used with the title text (if IsWithTitle is set to true)
32

private Color TheTitleColor; // The color to be used with the title text (if IsWithTitle is set to true)
34

private bool IsWithPaging; // Determine if paging is used
36

static int CurrentRow; // A static parameter that keep track on which Row (in the DataGridView control) that should be printed
38

static int PageNumber;
40

private int PageWidth;
42

private int PageHeight;
44

private int LeftMargin;
46

private int TopMargin;
48

private int RightMargin;
50

private int BottomMargin;
52

private float CurrentY; // A parameter that keep track on the y coordinate of the page, so the next object to be printed will start from this y coordinate
54

private float RowHeaderHeight;
56

private List<float> RowsHeight;
58

private List<float> ColumnsWidth;
60

private float TheDataGridViewWidth;
62

// Maintain a generic list to hold start/stop points for the column printing
66

// This will be used for wrapping in situations where the DataGridView will not fit on a single page
68

private List<int[]> mColumnPoints;
70

private List<float> mColumnPointsWidth;
72

private int mColumnPoint;
74

// The class constructor
78

public DataGridViewPrinter(DataGridView aDataGridView, PrintDocument aPrintDocument, bool CenterOnPage, bool WithTitle, string aTitleText, Font aTitleFont, Color aTitleColor, bool WithPaging)
80

{
81

TheDataGridView = aDataGridView;
83

ThePrintDocument = aPrintDocument;
85

IsCenterOnPage = CenterOnPage;
87

IsWithTitle = WithTitle;
89

TheTitleText = aTitleText;
91

TheTitleFont = aTitleFont;
93

TheTitleColor = aTitleColor;
95

IsWithPaging = WithPaging;
97

PageNumber = 0;
99

100

RowsHeight = new List<float>();
101

102

ColumnsWidth = new List<float>();
103

104

mColumnPoints = new List<int[]>();
105

106

mColumnPointsWidth = new List<float>();
107

108

// Claculating the PageWidth and the PageHeight
109

110

if (!ThePrintDocument.DefaultPageSettings.Landscape)
111

{
112

113

PageWidth = ThePrintDocument.DefaultPageSettings.PaperSize.Width;
114

115

PageHeight = ThePrintDocument.DefaultPageSettings.PaperSize.Height;
116

117

}
118

119

else
120

{
121

122

PageHeight = ThePrintDocument.DefaultPageSettings.PaperSize.Width;
123

124

PageWidth = ThePrintDocument.DefaultPageSettings.PaperSize.Height;
125

126

}
127

128

// Claculating the page margins
129

130

LeftMargin = ThePrintDocument.DefaultPageSettings.Margins.Left;
131

132

TopMargin = ThePrintDocument.DefaultPageSettings.Margins.Top;
133

134

RightMargin = ThePrintDocument.DefaultPageSettings.Margins.Right;
135

136

BottomMargin = ThePrintDocument.DefaultPageSettings.Margins.Bottom;
137

138

// First, the current row to be printed is the first row in the DataGridView control
139

140

CurrentRow = 0;
141

142

}
143

144

// The function that calculate the height of each row (including the header row), the width of each column (according to the longest text in all its cells including the header cell), and the whole DataGridView width
145

146

private void Calculate(Graphics g)
147

{
148

149

if (PageNumber == 0) // Just calculate once
150

{
151

152

SizeF tmpSize = new SizeF();
153

154

Font tmpFont;
155

156

float tmpWidth;
157

158

TheDataGridViewWidth = 0;
159

160

for (int i = 0; i < TheDataGridView.Columns.Count; i++)
161

{
162

163

tmpFont = TheDataGridView.ColumnHeadersDefaultCellStyle.Font;
164

165

if (tmpFont == null) // If there is no special HeaderFont style, then use the default DataGridView font style
166

167

tmpFont = TheDataGridView.DefaultCellStyle.Font;
168

169

tmpSize = g.MeasureString(TheDataGridView.Columns[i].HeaderText, tmpFont);
170

171

tmpWidth = tmpSize.Width;
172

173

RowHeaderHeight = tmpSize.Height;
174

175

for (int j = 0; j < TheDataGridView.Rows.Count; j++)
176

{
177

178

tmpFont = TheDataGridView.Rows[j].DefaultCellStyle.Font;
179

180

if (tmpFont == null) // If the there is no special font style of the CurrentRow, then use the default one associated with the DataGridView control
181

182

tmpFont = TheDataGridView.DefaultCellStyle.Font;
183

184

tmpSize = g.MeasureString("Anything", tmpFont);
185

186

RowsHeight.Add(tmpSize.Height);
187

188

tmpSize = g.MeasureString(TheDataGridView.Rows[j].Cells[i].EditedFormattedValue.ToString(), tmpFont);
189

190

if (tmpSize.Width > tmpWidth)
191

192

tmpWidth = tmpSize.Width;
193

194

}
195

196

if (TheDataGridView.Columns[i].Visible)
197

198

TheDataGridViewWidth += tmpWidth;
199

200

ColumnsWidth.Add(tmpWidth);
201

202

}
203

204

// Define the start/stop column points based on the page width and the DataGridView Width
205

206

// We will use this to determine the columns which are drawn on each page and how wrapping will be handled
207

208

// By default, the wrapping will occurr such that the maximum number of columns for a page will be determine
209

210

int k;
211

212

int mStartPoint = 0;
213

214

for (k = 0; k < TheDataGridView.Columns.Count; k++)
215

216

if (TheDataGridView.Columns[k].Visible)
217

{
218

219

mStartPoint = k;
220

221

break;
222

223

}
224

225

int mEndPoint = TheDataGridView.Columns.Count;
226

227

for (k = TheDataGridView.Columns.Count - 1; k >= 0; k--)
228

229

if (TheDataGridView.Columns[k].Visible)
230

{
231

232

mEndPoint = k + 1;
233

234

break;
235

236

}
237

238

float mTempWidth = TheDataGridViewWidth;
239

240

float mTempPrintArea = (float)PageWidth - (float)LeftMargin - (float)RightMargin;
241

242

243

244

// We only care about handling where the total datagridview width is bigger then the print area
245

246

if (TheDataGridViewWidth > mTempPrintArea)
247

{
248

249

mTempWidth = 0.0F;
250

251

for (k = 0; k < TheDataGridView.Columns.Count; k++)
252

{
253

254

if (TheDataGridView.Columns[k].Visible)
255

{
256

257

mTempWidth += ColumnsWidth[k];
258

259

// If the width is bigger than the page area, then define a new column print range
260

261

if (mTempWidth > mTempPrintArea)
262

{
263

264

mTempWidth -= ColumnsWidth[k];
265

266

mColumnPoints.Add(new int[] { mStartPoint, mEndPoint });
267

268

mColumnPointsWidth.Add(mTempWidth);
269

270

mStartPoint = k;
271

272

mTempWidth = ColumnsWidth[k];
273

274

}
275

276

}
277

278

// Our end point is actually one index above the current index
279

280

mEndPoint = k + 1;
281

282

}
283

284

}
285

286

// Add the last set of columns
287

288

mColumnPoints.Add(new int[] { mStartPoint, mEndPoint });
289

290

mColumnPointsWidth.Add(mTempWidth);
291

292

mColumnPoint = 0;
293

294

}
295

296

}
297

298

// The funtion that print the title, page number, and the header row
299

300

private void DrawHeader(Graphics g)
301

{
302

303

CurrentY = (float)TopMargin;
304

305

// Printing the page number (if isWithPaging is set to true)
306

307

if (IsWithPaging)
308

{
309

310

PageNumber = PageNumber+1;
311

312

string PageString = "Page " + PageNumber.ToString();
313

314

StringFormat PageStringFormat = new StringFormat();
315

316

PageStringFormat.Trimming = StringTrimming.Word;
317

318

PageStringFormat.FormatFlags = StringFormatFlags.NoWrap | StringFormatFlags.LineLimit | StringFormatFlags.NoClip;
319

320

PageStringFormat.Alignment = StringAlignment.Far;
321

322

Font PageStringFont = new Font("Tahoma", 8, FontStyle.Regular, GraphicsUnit.Point);
323

324

RectangleF PageStringRectangle = new RectangleF((float)LeftMargin, CurrentY, (float)PageWidth - (float)RightMargin - (float)LeftMargin, g.MeasureString(PageString, PageStringFont).Height);
325

326

g.DrawString(PageString, PageStringFont, new SolidBrush(Color.Black), PageStringRectangle, PageStringFormat);
327

328

CurrentY += g.MeasureString(PageString, PageStringFont).Height;
329

330

}
331

332

// Printing the title (if IsWithTitle is set to true)
333

334

if (IsWithTitle)
335

{
336

337

StringFormat TitleFormat = new StringFormat();
338

339

TitleFormat.Trimming = StringTrimming.Word;
340

341

TitleFormat.FormatFlags = StringFormatFlags.NoWrap | StringFormatFlags.LineLimit | StringFormatFlags.NoClip;
342

343

if (IsCenterOnPage)
344

345

TitleFormat.Alignment = StringAlignment.Center;
346

347

else
348

349

TitleFormat.Alignment = StringAlignment.Near;
350

351

RectangleF TitleRectangle = new RectangleF((float)LeftMargin, CurrentY, (float)PageWidth - (float)RightMargin - (float)LeftMargin, g.MeasureString(TheTitleText, TheTitleFont).Height);
352

353

g.DrawString(TheTitleText, TheTitleFont, new SolidBrush(TheTitleColor), TitleRectangle, TitleFormat);
354

355

CurrentY += g.MeasureString(TheTitleText, TheTitleFont).Height;
356

357

}
358

359

// Calculating the starting x coordinate that the printing process will start from
360

361

float CurrentX = (float)LeftMargin;
362

363

if (IsCenterOnPage)
364

365

CurrentX += (((float)PageWidth - (float)RightMargin - (float)LeftMargin) - mColumnPointsWidth[mColumnPoint]) / 2.0F;
366

367

// Setting the HeaderFore style
368

369

Color HeaderForeColor = TheDataGridView.ColumnHeadersDefaultCellStyle.ForeColor;
370

371

if (HeaderForeColor.IsEmpty) // If there is no special HeaderFore style, then use the default DataGridView style
372

373

HeaderForeColor = TheDataGridView.DefaultCellStyle.ForeColor;
374

375

SolidBrush HeaderForeBrush = new SolidBrush(HeaderForeColor);
376

377

// Setting the HeaderBack style
378

379

Color HeaderBackColor = TheDataGridView.ColumnHeadersDefaultCellStyle.BackColor;
380

381

if (HeaderBackColor.IsEmpty) // If there is no special HeaderBack style, then use the default DataGridView style
382

383

HeaderBackColor = TheDataGridView.DefaultCellStyle.BackColor;
384

385

SolidBrush HeaderBackBrush = new SolidBrush(HeaderBackColor);
386

387

// Setting the LinePen that will be used to draw lines and rectangles (derived from the GridColor property of the DataGridView control)
388

389

Pen TheLinePen = new Pen(TheDataGridView.GridColor, 1);
390

391

// Setting the HeaderFont style
392

393

Font HeaderFont = TheDataGridView.ColumnHeadersDefaultCellStyle.Font;
394

395

if (HeaderFont == null) // If there is no special HeaderFont style, then use the default DataGridView font style
396

397

HeaderFont = TheDataGridView.DefaultCellStyle.Font;
398

399

// Calculating and drawing the HeaderBounds
400

401

RectangleF HeaderBounds = new RectangleF(CurrentX, CurrentY, mColumnPointsWidth[mColumnPoint], RowHeaderHeight);
402

403

g.FillRectangle(HeaderBackBrush, HeaderBounds);
404

405

// Setting the format that will be used to print each cell of the header row
406

407

StringFormat CellFormat = new StringFormat();
408

409

CellFormat.Trimming = StringTrimming.Word;
410

411

CellFormat.FormatFlags = StringFormatFlags.NoWrap | StringFormatFlags.LineLimit | StringFormatFlags.NoClip;
412

413

// Printing each visible cell of the header row
414

415

RectangleF CellBounds;
416

417

float ColumnWidth;
418

419

for (int i = (int)mColumnPoints[mColumnPoint].GetValue(0); i < (int)mColumnPoints[mColumnPoint].GetValue(1); i++)
420

{
421

422

if (!TheDataGridView.Columns[i].Visible) continue; // If the column is not visible then ignore this iteration
423

424

ColumnWidth = ColumnsWidth[i];
425

426

// Check the CurrentCell alignment and apply it to the CellFormat
427

428

if (TheDataGridView.ColumnHeadersDefaultCellStyle.Alignment.ToString().Contains("Right"))
429

430

CellFormat.Alignment = StringAlignment.Far;
431

432

else if (TheDataGridView.ColumnHeadersDefaultCellStyle.Alignment.ToString().Contains("Center"))
433

434

CellFormat.Alignment = StringAlignment.Center;
435

436

else
437

438

CellFormat.Alignment = StringAlignment.Near;
439

440

CellBounds = new RectangleF(CurrentX, CurrentY, ColumnWidth, RowHeaderHeight);
441

442

// Printing the cell text
443

444

g.DrawString(TheDataGridView.Columns[i].HeaderText, HeaderFont, HeaderForeBrush, CellBounds, CellFormat);
445

446

// Drawing the cell bounds
447

448

if (TheDataGridView.RowHeadersBorderStyle != DataGridViewHeaderBorderStyle.None) // Draw the cell border only if the HeaderBorderStyle is not None
449

450

g.DrawRectangle(TheLinePen, CurrentX, CurrentY, ColumnWidth, RowHeaderHeight);
451

452

CurrentX += ColumnWidth;
453

454

}
455

456

CurrentY += RowHeaderHeight;
457

458

}
459

460

// The function that print a bunch of rows that fit in one page
461

462

// When it returns true, meaning that there are more rows still not printed, so another PagePrint action is required
463

464

// When it returns false, meaning that all rows are printed (the CureentRow parameter reaches the last row of the DataGridView control) and no further PagePrint action is required
465

466

private bool DrawRows(Graphics g)
467

{
468

469

// Setting the LinePen that will be used to draw lines and rectangles (derived from the GridColor property of the DataGridView control)
470

471

Pen TheLinePen = new Pen(TheDataGridView.GridColor, 1);
472

473

// The style paramters that will be used to print each cell
474

475

Font RowFont;
476

477

Color RowForeColor;
478

479

Color RowBackColor;
480

481

SolidBrush RowForeBrush;
482

483

SolidBrush RowBackBrush;
484

485

SolidBrush RowAlternatingBackBrush;
486

487

// Setting the format that will be used to print each cell
488

489

StringFormat CellFormat = new StringFormat();
490

491

CellFormat.Trimming = StringTrimming.Word;
492

493

CellFormat.FormatFlags = StringFormatFlags.NoWrap | StringFormatFlags.LineLimit;
494

495

// Printing each visible cell
496

497

RectangleF RowBounds;
498

499

float CurrentX;
500

501

float ColumnWidth;
502

503

while (CurrentRow < TheDataGridView.Rows.Count)
504

{
505

506

if (TheDataGridView.Rows[CurrentRow].Visible) // Print the cells of the CurrentRow only if that row is visible
507

{
508

509

// Setting the row font style
510

511

RowFont = TheDataGridView.Rows[CurrentRow].DefaultCellStyle.Font;
512

513

if (RowFont == null) // If the there is no special font style of the CurrentRow, then use the default one associated with the DataGridView control
514

515

RowFont = TheDataGridView.DefaultCellStyle.Font;
516

517

// Setting the RowFore style
518

519

RowForeColor = TheDataGridView.Rows[CurrentRow].DefaultCellStyle.ForeColor;
520

521

if (RowForeColor.IsEmpty) // If the there is no special RowFore style of the CurrentRow, then use the default one associated with the DataGridView control
522

523

RowForeColor = TheDataGridView.DefaultCellStyle.ForeColor;
524

525

RowForeBrush = new SolidBrush(RowForeColor);
526

527

// Setting the RowBack (for even rows) and the RowAlternatingBack (for odd rows) styles
528

529

RowBackColor = TheDataGridView.Rows[CurrentRow].DefaultCellStyle.BackColor;
530

531

if (RowBackColor.IsEmpty) // If the there is no special RowBack style of the CurrentRow, then use the default one associated with the DataGridView control
532

{
533

534

RowBackBrush = new SolidBrush(TheDataGridView.DefaultCellStyle.BackColor);
535

536

RowAlternatingBackBrush = new SolidBrush(TheDataGridView.AlternatingRowsDefaultCellStyle.BackColor);
537

538

}
539

540

else // If the there is a special RowBack style of the CurrentRow, then use it for both the RowBack and the RowAlternatingBack styles
541

{
542

543

RowBackBrush = new SolidBrush(RowBackColor);
544

545

RowAlternatingBackBrush = new SolidBrush(RowBackColor);
546

547

}
548

549

// Calculating the starting x coordinate that the printing process will start from
550

551

CurrentX = (float)LeftMargin;
552

553

if (IsCenterOnPage)
554

555

CurrentX += (((float)PageWidth - (float)RightMargin - (float)LeftMargin) - mColumnPointsWidth[mColumnPoint]) / 2.0F;
556

557

// Calculating the entire CurrentRow bounds
558

559

RowBounds = new RectangleF(CurrentX, CurrentY, mColumnPointsWidth[mColumnPoint], RowsHeight[CurrentRow]);
560

561

// Filling the back of the CurrentRow
562

563

if (CurrentRow % 2 == 0)
564

565

g.FillRectangle(RowBackBrush, RowBounds);
566

567

else
568

569

g.FillRectangle(RowAlternatingBackBrush, RowBounds);
570

571

// Printing each visible cell of the CurrentRow
572

573

for (int CurrentCell = (int)mColumnPoints[mColumnPoint].GetValue(0); CurrentCell < (int)mColumnPoints[mColumnPoint].GetValue(1); CurrentCell++)
574

{
575

576

if (!TheDataGridView.Columns[CurrentCell].Visible) continue; // If the cell is belong to invisible column, then ignore this iteration
577

578

// Check the CurrentCell alignment and apply it to the CellFormat
579

580

if (TheDataGridView.Columns[CurrentCell].DefaultCellStyle.Alignment.ToString().Contains("Right"))
581

582

CellFormat.Alignment = StringAlignment.Far;
583

584

else if (TheDataGridView.Columns[CurrentCell].DefaultCellStyle.Alignment.ToString().Contains("Center"))
585

586

CellFormat.Alignment = StringAlignment.Center;
587

588

else
589

590

CellFormat.Alignment = StringAlignment.Near;
591

592

593

594

ColumnWidth = ColumnsWidth[CurrentCell];
595

596

RectangleF CellBounds = new RectangleF(CurrentX, CurrentY, ColumnWidth, RowsHeight[CurrentRow]);
597

598

// Printing the cell text
599

600

g.DrawString(TheDataGridView.Rows[CurrentRow].Cells[CurrentCell].EditedFormattedValue.ToString(), RowFont, RowForeBrush, CellBounds, CellFormat);
601

602

603

604

// Drawing the cell bounds
605

606

if (TheDataGridView.CellBorderStyle != DataGridViewCellBorderStyle.None) // Draw the cell border only if the CellBorderStyle is not None
607

608

g.DrawRectangle(TheLinePen, CurrentX, CurrentY, ColumnWidth, RowsHeight[CurrentRow]);
609

610

CurrentX += ColumnWidth;
611

612

}
613

614

CurrentY += RowsHeight[CurrentRow];
615

616

// Checking if the CurrentY is exceeds the page boundries
617

618

// If so then exit the function and returning true meaning another PagePrint action is required
619

620

if ((int)CurrentY > (PageHeight - TopMargin - BottomMargin))
621

{
622

623

CurrentRow++;
624

625

return true;
626

627

}
628

629

}
630

631

CurrentRow++;
632

633

}
634

635

CurrentRow = 0;
636

637

mColumnPoint++; // Continue to print the next group of columns
638

639

if (mColumnPoint == mColumnPoints.Count) // Which means all columns are printed
640

{
641

642

mColumnPoint = 0;
643

644

return false;
645

646

}
647

648

else
649

650

return true;
651

652

}
653

654

// The method that calls all other functions
655

656

public bool DrawDataGridView(Graphics g)
657

{
658

659

try
660

{
661

662

Calculate(g);
663

664

665

DrawHeader(g);
666

IsWithTitle = false;
667

bool bContinue = DrawRows(g);
668

669

return bContinue;
670

671

}
672

673

catch (Exception ex)
674

{
675

676

MessageBox.Show("Operation failed: " + ex.Message.ToString(), Application.ProductName + " - Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
677

678

return false;
679

680

}
681

682

}
683

684

685

}
686

}
687

688

689

690

691

posted on 2009-08-06 17:31 賀挺閱讀(672) 評論(0) 編輯收藏所屬分類: c#范例

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