NPOI获取Excel文件里的形状/图片的坐标/锚点
2022/4/14 6:17:22
本文主要是介绍NPOI获取Excel文件里的形状/图片的坐标/锚点,对大家解决编程问题具有一定的参考价值,需要的程序猿们随着小编来一起学习吧!
有个妹纸找我请教如何获取图片坐标,因此我到家后花了点时间,写了这份代码。
实测下来,可以正确获取Excel 2003版本的形状和图片这两种的坐标/锚点,以及Excel 2007版本的图片的坐标/锚点。
暂未解决如何将Excel 2007以上版本的形状(XSSFSimpleShape)转换成图片(XSSFPicture)的问题?
如有大佬懂的,还请多多指教。
class Program { static void Main(params string[] args) { string excel2003FilePath = @"D:\Users\Allen\Desktop\image.xls"; GetPictureAnchorTest(excel2003FilePath); string excel2007FilePath = @"D:\Users\Allen\Desktop\image.xlsx"; GetPictureAnchorTest(excel2007FilePath); Console.ReadKey(); } static void GetPictureAnchorTest(string excelFilePath) { IWorkbook workbook = WorkbookFactory.Create(excelFilePath); ISheet sheet = workbook.GetSheetAt(0); IEnumerable<IPicture> pictures = sheet.GetPictures(); foreach (IPicture picture in pictures) { PictureAnchor anchor = picture.GetPictureAnchor(); Console.WriteLine($"PictureType:{picture.GetType().FullName}, LeftmostCellIndex: {anchor.LeftmostCellIndex}, RightmostCellIndex: {anchor.RightmostCellIndex}, TopmostRowIndex: {anchor.TopmostRowIndex}, BottommostRowIndex: {anchor.BottommostRowIndex}"); } } } public readonly struct PictureAnchor { public PictureAnchor(int leftmostCellIndex, int rightmostCellIndex, int topmostRowIndex, int bottommostRowIndex) { LeftmostCellIndex = leftmostCellIndex; RightmostCellIndex = rightmostCellIndex; TopmostRowIndex = topmostRowIndex; BottommostRowIndex = bottommostRowIndex; } public int LeftmostCellIndex { get; } public int RightmostCellIndex { get; } public int TopmostRowIndex { get; } public int BottommostRowIndex { get; } public override string ToString() { return $"LeftmostCellIndex: {LeftmostCellIndex}, RightmostCellIndex: {RightmostCellIndex}, TopmostRowIndex: {TopmostRowIndex}, BottommostRowIndex: {BottommostRowIndex}"; } } public static class NPOIExtensions { public static IEnumerable<IPicture> GetPictures(this ISheet sheet) { var dp = sheet.DrawingPatriarch; // Excel 2003 if (dp is HSSFPatriarch patriarch) { return patriarch.GetShapes().Select(x => { if (x is HSSFPicture picture) { return picture; } else { return new HSSFPicture(x, x.Anchor); } }).Cast<IPicture>(); } // Excel 2007 above if (dp is XSSFDrawing dr) { //TODO: How convert XSSFSimpleShape to XSSFPicture ??? return dr.GetShapes().Where(x => x is XSSFPicture).Cast<IPicture>(); } throw new NotSupportedException($"Unsupported DrawingPatriarch object type:{dp.GetType().FullName}"); } public static PictureAnchor GetPictureAnchor(this IPicture picture) { var anchor = picture.ClientAnchor; return new PictureAnchor(anchor.Col1, anchor.Col2, anchor.Row1, anchor.Row2); } }
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