如何在c＃asp.net中使用itextsharp为表添加外行

I'am creating a 2*2 table on pdf file. I Just want to put outer border for the table, No need to show the inner cells border. I have tried like this

我正在pdf文件上创建一个2 * 2表。我只是想把桌子的外边框，不需要显示内部细胞边界。我试过这样的

 var back= new PdfPTable(2); //table for back
           back.DefaultCell.Border = 1;
           PdfPCell cell20 = new PdfPCell(new Phrase("cell1", body));
           cell20.Border = 0;
           back.AddCell(cell20);

           PdfPCell cell21 = new PdfPCell(new Phrase("cell2", body));
           cell21.Border = 0;
           cell21.HorizontalAlignment = 1; //0=Left, 1=Centre, 2=Right
           back.AddCell(cell21);

           PdfPCell cell22 = new PdfPCell(new Phrase("cell3"));
           cell22.Border = 0;
           cell22.HorizontalAlignment = 1; //0=Left, 1=Centre, 2=Right
           back.AddCell(cell22);

           PdfPCell cell23 = new PdfPCell(new Phrase("cell4", body));
           cell23.Border = 0;
           cell23.HorizontalAlignment = 1; //0=Left, 1=Centre, 2=Right
           back.AddCell(cell23);

but it results a table without any border, please help

但它导致没有任何边框的表，请帮助

1 个解决方案

#1

You need to create a table event, for instance:

您需要创建一个表事件，例如：

public class OuterBorder implements PdfPTableEvent {
    public void tableLayout(PdfPTable table, float[][] width, float[] height,
            int headerRows, int rowStart, PdfContentByte[] canvas) {
        float widths[] = width[0];
        float x1 = widths[0];
        float x2 = widths[widths.length - 1];
        float y1 = height[0];
        float y2 = height[height.length - 1];
        PdfContentByte cb = canvas[PdfPTable.LINECANVAS];
        cb.rectangle(x1, y1, x2 - x1, y2 - y1);
        cb.stroke();
    }
}

As you can see, we use the width and height parameter passed to the tableLayout() method to define the borders of a rectangle, and we draw that rectangle to the LINECANVAS.

如您所见，我们使用传递给tableLayout（）方法的width和height参数来定义矩形的边框，然后将该矩形绘制到LINECANVAS。

For this table event to work, you need to declare it to the table. In your case, that would be:

要使此表事件起作用，您需要将其声明为表。在你的情况下，那将是：

back.setTableEvent(new OuterBorder());

Note that my code is written in Java based on the PressPreviews example from my book. For the corresponding C# code, please consult the iTextSharp examples.

请注意，我的代码是基于我书中的PressPreviews示例用Java编写的。有关相应的C＃代码，请参阅iTextSharp示例。

#1