使用 iText7 从页面剪切矩形并放置到另一页

Question

我想复制矩形大小的位置并放到另一个页面。例如。我有 100 页，我想切入 x、y 并具有 width、height 坐标的 54 页矩形并将其放入 3 页。
我的方法是这样的：

public void CopyRect(string filenamePdf, 
                     Rectangle rect, 
                     int sourcePageNumber, 
                     int destinationPageNumber)
{
}

string filenamePdf 是我的来源 pdf
rectangle rect 是我的坐标 (x,y, width, height)
int sourcePageNumber 是我要从中复制带有信息的矩形的页面
int destinantionPageNumber 是我要放置带有信息的矩形的页面。

我该如何描述这个方法？谢谢。

Answer 1

在这里我找到了解决办法：

 public void CopyRectCopy(string filenamePdf,
                          Rectangle rect,
                          int sourcePageNumber,
                          int destinationPageNumber)
    {
        PdfDocument srcDoc = new PdfDocument(new PdfReader(filenamePdf));
        PdfDocument resultPdfDoc = new PdfDocument(newPdfWriter(@"C:\Users\USER123"));
        int pageCounter = srcDoc.GetNumberOfPages();
        Rectangle toMove = rect;
        Rectangle pageSize = srcDoc.GetPage(sourcePageNumber).GetPageSize();
        PdfFormXObject pageXObject = srcDoc.GetPage(sourcePageNumber).CopyAsFormXObject(resultPdfDoc);


        PdfFormXObject formXObjectA = new PdfFormXObject(pageSize);
        for (int i = 1; i <= pageCounter; i++)
        {
            //deletes an rectangle from exact page.
            if (i == sourcePageNumber)
            {
                resultPdfDoc.AddNewPage();

                PdfCanvas canvasas = new PdfCanvas(formXObjectA, resultPdfDoc);
                canvasas.Rectangle(0, 0, 595.28, 841.89);
                canvasas.Rectangle(toMove);
                canvasas.EoClip();
                canvasas.EndPath();
                canvasas.AddXObject(pageXObject, 0, 0);
            }
            else
            {
                srcDoc.CopyPagesTo(i, i, resultPdfDoc);
            }

        }
        // Create a formXObject of the area to move.
        PdfFormXObject formXObject2 = new PdfFormXObject(pageSize);
        PdfCanvas canvas2 = new PdfCanvas(formXObject2, resultPdfDoc);
        canvas2.Rectangle(toMove);
        // This method uses the nonzero winding rule to determine which regions lie inside the clipping path.
        canvas2.Clip();
        canvas2.EndPath();
        canvas2.AddXObject(pageXObject, 0, 0);


        PdfCanvas canvas = new PdfCanvas(resultPdfDoc.GetPage(destinationPageNumber));
        PdfCanvas canvass = new PdfCanvas(resultPdfDoc.GetPage(sourcePageNumber));
        // Add the area to move content, shifted 10 points to the left and 2 points to the bottom.
        canvas.AddXObject(formXObject2, 0, -50);
        canvass.AddXObject(formXObjectA, 0, 0);

        srcDoc.Close();
        resultPdfDoc.Close();
    }

它从一页剪切一个矩形并粘贴到另一页。

已编辑。

使用 iText7 从页面剪切矩形并放置到另一页

Cut rectangle from page and place to another page by using iText7

c#

pdf

methods

winforms

itext7