How to Colorize Selected Rows in an iText Table?

Question

I want to draw a visual distinction between rows based on their content in my iText table.

I found a tutorial here:, but it's in Java instead of C#, and I don't know what version of iText it is for.

I am using iText 7 and it is apparently radically different than previous versions.

I tried using this code from that article:

if ((pod.Doc1Count > 0) && (pod.Doc2Count > 0))
{
    Cell cell = new Cell();
    cell.SetBackgroundColor(Color.DARK_GRAY);
}

...but it won't even compile (the Color class has no definition for DARK_GRAY).

I would much prefer to work with a row at a time, if that's possible, but I don't think it is.

Does anybody know how to change the background color of a row, either all at once, or a cell at a time, using iText 7?

UPDATE

I tried to convert this Java example to C#, but so far no go. This is what I have:

Color headerBg = new DeviceRgb(0xA6, 0xCB, 0x0B);
Color lineColor = new DeviceRgb(0xCC, 0xCC, 0xCC);
. . .
foreach (PairODocs pod in lstPairODocs.OrderByDescending(a => a.Doc1Prcntg).ThenByDescending(a => a.Doc2Prcntg))
{
    if ((pod.Doc1Count > 0) && (pod.Doc2Count > 0))
    {
        Cell cell = new Cell();
        cell.Add(new Paragraph(pod.Whirred));
        cell.SetBackgroundColor(Color.headerBg);
        table.AddCell(cell);
        // TODO: If get it to work, add for the other four vals below, too...
    }
    else // these work, but are plain jane
    {
        table.AddCell(pod.Whirred);
        table.AddCell(pod.Doc1Count.ToString());
        table.AddCell(pod.Doc1Prcntg.ToString());
        table.AddCell(pod.Doc2Count.ToString());
        table.AddCell(pod.Doc2Prcntg.ToString());
    }          
}

...and the compiler says, "Error CS0117 'Color' does not contain a definition for 'headerBg'" on the cell.SetBackgroundColor(Color.headerBg); line.

UPDATE 2

I had an extraneous "Color." preceding "headerBg" which was causing it to not compile. After removing it, it compiles with this code:

if ((pod.Doc1Count > 0) && (pod.Doc2Count > 0))
{
    Cell cell = new Cell();
    cell.Add(new Paragraph(pod.Whirred));
    cell.SetBackgroundColor(headerBg);
    table.AddCell(cell);

    cell = new Cell();
    cell.Add(new Paragraph(pod.Doc1Count.ToString()));
    cell.SetBackgroundColor(headerBg);
    table.AddCell(cell);

    ... // etc.
}

Does this answer your question? [How to create / set custom color of table cells and borders in iText 7?](https://stackoverflow.com/questions/47038011/how-to-create-set-custom-color-of-table-cells-and-borders-in-itext-7) — mathis1337, Jun 13 '20 at 21:01
@mathis1337: No, it's for Java and doesn't work in C#. I'll post what I tried with it... — B. Clay Shannon-B. Crow Raven, Jun 13 '20 at 23:36
I linked that because it links to API docs for iText. Where it is clear as day on how to handle this in .net. I'd give them a read: https://api.itextpdf.com/iText7/dotnet/7.1.11/classi_text_1_1_kernel_1_1_colors_1_1_color.html — mathis1337, Jun 13 '20 at 23:39
@mathis1337: "clear as day" is "muddy as a swamp" to me; it would have been nice if they would have given an example of how to apply all that whizbang gobbledygook. — B. Clay Shannon-B. Crow Raven, Jun 13 '20 at 23:51
Reading documents is core for any level of developer. It would help with the question and what all you have already tried friend. If I have time I will get you an example as this seems rather straight forward to me. I will see what I can whip up once back home. Is using iText a must by the way? — mathis1337, Jun 13 '20 at 23:52
`cell.SetBackgroundColor(headerBg);` shouldn't this be working? — Chetan, Jun 14 '20 at 00:04
@mathis1337: Thanks; iText isn't necessarily a must, if there's a better way. — B. Clay Shannon-B. Crow Raven, Jun 14 '20 at 10:15
@ChetanRanpariya: Yes, it finally worked; I had an extraneous "Color" prepending the "headerBg" — B. Clay Shannon-B. Crow Raven, Jun 14 '20 at 10:23

score 1 · Answer 1 · answered Jun 15 '20 at 03:49

1

Actually, if you're willing to stick with some basic colors, it's far simpler to use the iText.Kernel.Color class' ColorConstants class like so:

cell.SetBackgroundColor(ColorConstants.YELLOW);

answered Jun 15 '20 at 03:49

B. Clay Shannon-B. Crow Raven

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score 1 · Accepted Answer · answered Jun 16 '20 at 14:16

iText.Kernel.Colors.Color bgColour = new DeviceRgb(169, 169, 169);  //Create Darkgray color
cell.SetBackgroundColor(bgColour);  // Set the color we created to the cell

https://www.rapidtables.com/web/color/gray-color.html Here you can find multiple colors, just choose the one you like and edit the '169, 169, 169' in the example above.

How to Colorize Selected Rows in an iText Table?

UPDATE

UPDATE 2

2 Answers2