Question

不会为第一个单元格调用此事件

 public class pdfCellBorder : IPdfPCellEvent
    {
        public void CellLayout(PdfPCell cell, Rectangle position, PdfContentByte[] canvases)
        {         
            PdfContentByte canvas = canvases[PdfPTable.LINECANVAS];                     
            canvas.SetLineDash(0.5F, 2.2F, 0 );
            canvas.Stroke();       
        }
    }

评论代码：

PdfPTable table = new PdfPTable(1);
pdfCellBorder pdfcell = new pdfCellBorder();
table.DefaultCell.CellEvent = pdfcell;
table.DefaultCell.Border = PdfPCell.NO_BORDER;
PdfPCell cell = new PdfPCell(new Phrase("product"));
cell.Border = Rectangle.BOTTOM_BORDER;
cell.CellEvent = pdfcell;
table.AddCell(cell);
cell = new PdfPCell(new Phrase("product"));
// cell.BorderWidthBottom = 1f;
cell.Border = Rectangle.BOTTOM_BORDER;
cell.CellEvent = pdfcell;
table.AddCell(cell);

public class pdfCellBorder : IPdfPCellEvent {
    public void CellLayout(PdfPCell cell, Rectangle position, PdfContentByte[] canvases) {
        PdfContentByte canvas = canvases[PdfPTable.LINECANVAS];
        //canvas.SetLineWidth(0.5F);
        canvas.SetLineDash(0.5F, 2.2F, 0);
        canvas.Rectangle(position.Left, position.Bottom, position.Width, 0);
        canvas.Stroke();
    }
}

Answer 1

你可以用两件事来解决这个问题。首先，在您的活动中设置实际Rectangle：

public class pdfCellBorder : IPdfPCellEvent {
    public void CellLayout(PdfPCell cell, iTextSharp.text.Rectangle position, PdfContentByte[] canvases) {
        PdfContentByte canvas = canvases[PdfPTable.LINECANVAS];
        canvas.SetLineDash(0.5F, 2.2F, 0);

        //Set the rectangle to draw on
        canvas.Rectangle(position.Left, position.Bottom, position.Width, position.Height);
        canvas.Stroke();
    }
}

其次，禁用默认单元格上的边框：

var t = new PdfPTable(2);
t.DefaultCell.CellEvent = new pdfCellBorder();

//Disable the border
t.DefaultCell.Border = PdfPCell.NO_BORDER;
t.AddCell("Hello");
t.AddCell("World");

doc.Add(t);

修改

根据您的评论，您需要一条线，并且只需在每个单元格的底部绘制一条线。您只想使用Rectangle和MoveTo绘制一条线而不是LineTo：

public class pdfCellBorder : IPdfPCellEvent { public void CellLayout(PdfPCell cell, iTextSharp.text.Rectangle position, PdfContentByte[] canvases) { PdfContentByte canvas = canvases[PdfPTable.LINECANVAS]; canvas.SetLineDash(0.5F, 2.2F, 0); //Move the "pen" to where we want to start drawing canvas.MoveTo(position.Left, position.Bottom); //Draw a straight line canvas.LineTo(position.Right, position.Bottom); canvas.Stroke(); } }

但是，您仍需要在所有单元格上禁用自动边框。如果你设置下面的任何边框，你指示iTextSharp为你绘制它们。此外，由于您致电new PdfPCell()，我们可以删除与DefaultCell
相关的任何内容
PdfPTable table = new PdfPTable(1); pdfCellBorder pdfcell = new pdfCellBorder(); PdfPCell cell = new PdfPCell(new Phrase("product")); cell.Border = PdfPCell.NO_BORDER; cell.CellEvent = pdfcell; table.AddCell(cell); cell = new PdfPCell(new Phrase("product")); cell.Border = PdfPCell.NO_BORDER; cell.CellEvent = pdfcell; table.AddCell(cell);

PdfPCellEvent不适用于第一个细胞？

1 个答案: