استخراج جدول من مستند PDF

الشفرة التالية تعمل أيضًا مع مكتبة Aspose.PDF.Drawing .

استخراج جدول من PDF

// For complete examples and data files, visit https://github.com/aspose-pdf/Aspose.PDF-for-.NET
private static void Extract_Table()
{
    // The path to the documents directory
    var dataDir = RunExamples.GetDataDir_AsposePdf_Tables();

    // Open PDF document
    using (var document = new Aspose.Pdf.Document(dataDir + "the_worlds_cities_in_2018_data_booklet 7.pdf"))
    {          
        foreach (var page in document.Pages)
        {
            Aspose.Pdf.Text.TableAbsorber absorber = new Aspose.Pdf.Text.TableAbsorber();
            absorber.Visit(page);
            foreach (var table in absorber.TableList)
            {
                foreach (var row in table.RowList)
                {
                    foreach (var cell in row.CellList)
                    {
                        var textfragment = new Aspose.Pdf.Text.TextFragment();
                        TextFragmentCollection textFragmentCollection = cell.TextFragments;
                        foreach (var fragment in textFragmentCollection)
                        {
                            string txt = "";
                            foreach (var seg in fragment.Segments)
                            {
                                txt += seg.Text;
                            }
                            Console.WriteLine(txt);
                        }
                    }
                }
            }
        }
    }
}

استخراج حدود الجدول كصورة

حدود الصفحة هي عمليات رسم المسار. لذلك، فإن منطق معالجة Pdf->Html يقوم فقط بتنفيذ تعليمات الرسم ويضع الخلفية خلف النص. لذا، لتكرار المنطق، يجب عليك معالجة مشغلات المحتويات يدويًا ورسم الرسومات بنفسك. أيضًا، يرجى ملاحظة أن الشفرة التالية قد لا تعمل بدقة مع ملفات PDF المختلفة، ولكن إذا واجهت أي مشكلة، فلا تتردد في الاتصال. تم تطوير هذه الشفرة لملفات PDF محددة. توضح الشفرة التالية الخطوات لاستخراج حدود الجدول كصورة من مستند PDF.

// For complete examples and data files, visit https://github.com/aspose-pdf/Aspose.PDF-for-.NET
private static void ExtractTableBorder()
{
    // The path to the documents directory
    var dataDir = RunExamples.GetDataDir_AsposePdf_Tables();

    // Open PDF document
    using (var document = new Aspose.Pdf.Document(dataDir + "input.pdf"))
    {
        Stack graphicsState = new Stack();
        using (var bitmap = new System.Drawing.Bitmap((int)document.Pages[1].PageInfo.Width, (int)document.Pages[1].PageInfo.Height))
        {
            System.Drawing.Drawing2D.GraphicsPath graphicsPath = new System.Drawing.Drawing2D.GraphicsPath();
            // Default ctm matrix value is 1,0,0,1,0,0
            System.Drawing.Drawing2D.Matrix lastCTM = new System.Drawing.Drawing2D.Matrix(1, 0, 0, -1, 0, 0);
            // System.Drawing coordinate system is top left based, while pdf coordinate system is low left based, so we have to apply the inversion matrix
            System.Drawing.Drawing2D.Matrix inversionMatrix = new System.Drawing.Drawing2D.Matrix(1, 0, 0, -1, 0, (float)document.Pages[1].PageInfo.Height);
            System.Drawing.PointF lastPoint = new System.Drawing.PointF(0, 0);
            System.Drawing.Color fillColor = System.Drawing.Color.FromArgb(0, 0, 0);
            System.Drawing.Color strokeColor = System.Drawing.Color.FromArgb(0, 0, 0);

            using (System.Drawing.Graphics gr = System.Drawing.Graphics.FromImage(bitmap))
            {
                gr.SmoothingMode = SmoothingMode.HighQuality;
                graphicsState.Push(new System.Drawing.Drawing2D.Matrix(1, 0, 0, 1, 0, 0));

                // Process all the contents commands
                foreach (var op in document.Pages[1].Contents)
                {
                    var opSaveState = op as Aspose.Pdf.Operators.GSave;
                    var opRestoreState = op as Aspose.Pdf.Operators.GRestore;
                    var opCtm = op as Aspose.Pdf.Operators.ConcatenateMatrix;
                    var opMoveTo = op as Aspose.Pdf.Operators.MoveTo;
                    var opLineTo = op as Aspose.Pdf.Operators.LineTo;
                    var opRe = op as Aspose.Pdf.Operators.Re;
                    var opEndPath = op as Aspose.Pdf.Operators.EndPath;
                    var opStroke = op as Aspose.Pdf.Operators.Stroke;
                    var opFill = op as Aspose.Pdf.Operators.Fill;
                    var opEOFill = op as Aspose.Pdf.Operators.EOFill;
                    var opRGBFillColor = op as Aspose.Pdf.Operators.SetRGBColor;
                    var opRGBStrokeColor = op as Aspose.Pdf.Operators.SetRGBColorStroke;

                    if (opSaveState != null)
                    {
                        // Save previous state and push current state to the top of the stack
                        graphicsState.Push(((System.Drawing.Drawing2D.Matrix)graphicsState.Peek()).Clone());
                        lastCTM = (System.Drawing.Drawing2D.Matrix)graphicsState.Peek();
                    }
                    else if (opRestoreState != null)
                    {
                        // Throw away current state and restore previous one
                        graphicsState.Pop();
                        lastCTM = (System.Drawing.Drawing2D.Matrix)graphicsState.Peek();
                    }
                    else if (opCtm != null)
                    {
                        System.Drawing.Drawing2D.Matrix cm = new System.Drawing.Drawing2D.Matrix(
                            (float)opCtm.Matrix.A,
                            (float)opCtm.Matrix.B,
                            (float)opCtm.Matrix.C,
                            (float)opCtm.Matrix.D,
                            (float)opCtm.Matrix.E,
                            (float)opCtm.Matrix.F);

                        // Multiply current matrix with the state matrix
                        ((System.Drawing.Drawing2D.Matrix)graphicsState.Peek()).Multiply(cm);
                        lastCTM = (System.Drawing.Drawing2D.Matrix)graphicsState.Peek();
                    }
                    else if (opMoveTo != null)
                    {
                        lastPoint = new System.Drawing.PointF((float)opMoveTo.X, (float)opMoveTo.Y);
                    }
                    else if (opLineTo != null)
                    {
                        System.Drawing.PointF linePoint = new System.Drawing.PointF((float)opLineTo.X, (float)opLineTo.Y);
                        graphicsPath.AddLine(lastPoint, linePoint);

                        lastPoint = linePoint;
                    }
                    else if (opRe != null)
                    {
                        System.Drawing.RectangleF re = new System.Drawing.RectangleF((float)opRe.X, (float)opRe.Y, (float)opRe.Width, (float)opRe.Height);
                        graphicsPath.AddRectangle(re);
                    }
                    else if (opEndPath != null)
                    {
                        graphicsPath = new System.Drawing.Drawing2D.GraphicsPath();
                    }
                    else if (opRGBFillColor != null)
                    {
                        fillColor = opRGBFillColor.getColor();
                    }
                    else if (opRGBStrokeColor != null)
                    {
                        strokeColor = opRGBStrokeColor.getColor();
                    }
                    else if (opStroke != null)
                    {
                        graphicsPath.Transform(lastCTM);
                        graphicsPath.Transform(inversionMatrix);
                        gr.DrawPath(new System.Drawing.Pen(strokeColor), graphicsPath);
                        graphicsPath = new System.Drawing.Drawing2D.GraphicsPath();
                    }
                    else if (opFill != null)
                    {
                        graphicsPath.FillMode = FillMode.Winding;
                        graphicsPath.Transform(lastCTM);
                        graphicsPath.Transform(inversionMatrix);
                        gr.FillPath(new System.Drawing.SolidBrush(fillColor), graphicsPath);
                        graphicsPath = new System.Drawing.Drawing2D.GraphicsPath();
                    }
                    else if (opEOFill != null)
                    {
                        graphicsPath.FillMode = FillMode.Alternate;
                        graphicsPath.Transform(lastCTM);
                        graphicsPath.Transform(inversionMatrix);
                        gr.FillPath(new System.Drawing.SolidBrush(fillColor), graphicsPath);
                        graphicsPath = new System.Drawing.Drawing2D.GraphicsPath();
                    }
                }
            }

            bitmap.Save(dataDir + "ExtractTableBorder_out.png", ImageFormat.Png);
        }
    }
}