111 lines
4.0 KiB
C#
111 lines
4.0 KiB
C#
using DocumentFormat.OpenXml;
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using DocumentFormat.OpenXml.Packaging;
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using DocumentFormat.OpenXml.Spreadsheet;
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using System;
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using System.Drawing;
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using System.IO;
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using System.Linq;
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using System.Text;
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using A = DocumentFormat.OpenXml.Drawing;
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using Xdr = DocumentFormat.OpenXml.Drawing.Spreadsheet;
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namespace OnlineSalesAutoCrop.CoreAPI.Models.Global
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{
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internal static class ExcelTools
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{
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private static PartTypeInfo GetImagePartTypeByBitmap(byte[] bytes)
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{
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byte[] tiff = "II*"u8.ToArray(); // TIFF
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byte[] tiff2 = "MM*"u8.ToArray(); // TIFF
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byte[] jpeg = [255, 216, 255]; // jpeg
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byte[] bmp = Encoding.ASCII.GetBytes("BM"); // BMP
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byte[] gif = Encoding.ASCII.GetBytes("GIF"); // GIF
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byte[] png = [137, 80, 78, 71]; // PNG
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if (bmp.SequenceEqual(bytes.Take(bmp.Length)))
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return ImagePartType.Bmp;
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else if (gif.SequenceEqual(bytes.Take(gif.Length)))
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return ImagePartType.Gif;
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else if (png.SequenceEqual(bytes.Take(png.Length)))
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return ImagePartType.Png;
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else if (tiff.SequenceEqual(bytes.Take(tiff.Length)))
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return ImagePartType.Tiff;
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else if (tiff2.SequenceEqual(bytes.Take(tiff2.Length)))
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return ImagePartType.Tiff;
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else if (jpeg.SequenceEqual(bytes.Take(jpeg.Length)))
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return ImagePartType.Jpeg;
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throw new InvalidOperationException("Image type could not be determined.");
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}
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/// <summary>
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///
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/// </summary>
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/// <param name="worksheetPart"></param>
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/// <param name="stream"></param>
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/// <param name="imgDescription"></param>
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/// <param name="colNumber"></param>
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/// <param name="rowNumber"></param>
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public static void AddImage(WorksheetPart worksheetPart, Stream stream, string imgDescription, int colNumber, int rowNumber)
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{
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var drawingsPart = worksheetPart.DrawingsPart;
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drawingsPart ??= worksheetPart.AddNewPart<DrawingsPart>();
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if (!worksheetPart.Worksheet.ChildElements.OfType<Drawing>().Any())
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worksheetPart.Worksheet.AppendChild(new Drawing { Id = worksheetPart.GetIdOfPart(drawingsPart) });
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drawingsPart.WorksheetDrawing ??= new Xdr.WorksheetDrawing();
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var worksheetDrawing = drawingsPart.WorksheetDrawing;
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ImagePart imagePart;
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long extentsCx = 0, extentsCy = 0;
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using (MemoryStream ms = new())
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{
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stream.Position = 0;
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stream.CopyTo(ms);
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stream.Position = 0;
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#pragma warning disable CA1416 // Validate platform compatibility
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using Bitmap bmp = new(ms);
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imagePart = drawingsPart.AddImagePart(GetImagePartTypeByBitmap(ms.ToArray()));
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imagePart.FeedData(stream);
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extentsCx = bmp.Width * (long)(914400 / bmp.HorizontalResolution);
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extentsCy = bmp.Height * (long)(914400 / bmp.VerticalResolution);
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#pragma warning restore CA1416 // Validate platform compatibility
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}
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uint nvpId = worksheetDrawing.Descendants<Xdr.NonVisualDrawingProperties>().Any() ? (UInt32Value)worksheetDrawing.Descendants<Xdr.NonVisualDrawingProperties>().Max(p => p.Id.Value) + 1 : 1U;
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Xdr.OneCellAnchor oneCellAnchor = new(
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new Xdr.FromMarker
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{
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ColumnId = new Xdr.ColumnId((colNumber - 1).ToString()),
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RowId = new Xdr.RowId((rowNumber - 1).ToString()),
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ColumnOffset = new Xdr.ColumnOffset("0"),
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RowOffset = new Xdr.RowOffset("0")
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},
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new Xdr.Extent { Cx = extentsCx, Cy = extentsCy },
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new Xdr.Picture(
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new Xdr.NonVisualPictureProperties(
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new Xdr.NonVisualDrawingProperties { Id = nvpId, Name = "Picture " + nvpId, Description = imgDescription },
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new Xdr.NonVisualPictureDrawingProperties(new A.PictureLocks { NoChangeAspect = true })
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),
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new Xdr.BlipFill(
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new A.Blip { Embed = drawingsPart.GetIdOfPart(imagePart), CompressionState = A.BlipCompressionValues.Print },
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new A.Stretch(new A.FillRectangle())
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),
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new Xdr.ShapeProperties(
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new A.Transform2D(
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new A.Offset { X = 0, Y = 0 },
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new A.Extents { Cx = extentsCx, Cy = extentsCy }
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),
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new A.PresetGeometry { Preset = A.ShapeTypeValues.Rectangle }
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)
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),
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new Xdr.ClientData()
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);
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worksheetDrawing.Append(oneCellAnchor);
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}
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}
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}
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