OpenXML的：确定图像在Excel单元格

问题描述

我有一个包含4张图片的Excel文档，每个都在单元格A1，A2，A3，A4中

I have An Excel document with 4 images, each in a cell A1,A2,A3,A4

我可以迭代工作表中的所有图像，但我需要能够编辑这个函数给我的图像在A1和A2例如

I can iterate thru all the images in the worksheet, but I need to be able to edit this function to give me the image in "A1" and "A2" for instance

    [Test]
    public void IterateThruImages()
    {
        WorkbookPart wbPart = document.WorkbookPart;
        var workSheet = wbPart.WorksheetParts.FirstOrDefault();

        foreach(ImagePart i in workSheet.DrawingsPart.GetPartsOfType<ImagePart>())
        {
            Stream stream = i.GetStream();
            long length = stream.Length;
            byte[] byteStream = new byte[length];
            stream.Read(byteStream, 0, (int)length);

            var imageAsString = Convert.ToBase64String(byteStream);
        }
    }

推荐答案

诀窍是获取图像的关系idrId。你得到的行/ col的TwoCellAnchor有问题。然后获取Embed。使用它来获取图像。

The trick is to get the relationship id "rId" of the image. You get that by getting the TwoCellAnchor of the row/col in question. Then get the Embed. Use that to get the image.

    [Test]
    public void GetImageRelationshipIdAndImageOfThatId()
    {
        string row = "1";
        string col = "0";

        WorkbookPart wbPart = document.WorkbookPart;
        var workSheet = wbPart.WorksheetParts.FirstOrDefault();

        TwoCellAnchor cellHoldingPicture = workSheet.DrawingsPart.WorksheetDrawing.OfType<TwoCellAnchor>()
             .Where(c => c.FromMarker.RowId.Text == row &&
                    c.FromMarker.ColumnId.Text == col).FirstOrDefault();

        var picture = cellHoldingPicture.OfType<DocumentFormat.OpenXml.Drawing.Spreadsheet.Picture>().FirstOrDefault();
        string rIdofPicture = picture.BlipFill.Blip.Embed;

        Console.WriteLine("The rID of this Anchor's [{0},{1}] Picture is '{2}'" ,row,col, rIdofPicture);

        ImagePart imageInThisCell = (ImagePart)workSheet.DrawingsPart.GetPartById(rIdofPicture);

    }

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