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Extraer Tabla de Documento PDF
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El siguiente fragmento de código también funciona con la biblioteca Aspose.PDF.Drawing.
Extraer Tabla de 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);
}
}
}
}
}
}
}
Extraer el borde de la tabla como Imagen
Los bordes de la página son operaciones de dibujo de rutas. Por lo tanto, la lógica de procesamiento de Pdf->Html simplemente realiza instrucciones de dibujo y coloca el fondo detrás del texto. Así que, para repetir la lógica, debe procesar manualmente los operadores de contenido y dibujar los gráficos usted mismo. También tenga en cuenta que el siguiente fragmento de código puede no funcionar con precisión para varios archivos PDF, pero si encuentra algún problema, no dude en contactar. Este código fue desarrollado para archivos PDF específicos. El siguiente fragmento de código muestra los pasos para extraer el borde de la tabla como Imagen de un documento 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);
}
}
}