获取excel中每行的图片

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最近有个项目需要将excel中每行插入图片导入数据库。首次导图片参考了好多资料，今天把自己的整理一份，以供今后参考并和大家分享。

先定义一个图片实体类

public   class PicturesInfo    {        public int MinRow { get; set; }          public int MaxRow { get; set; }         public int MinCol { get; set; }        public int MaxCol { get; set; }        public Byte[] PictureData { get; private set; }        public PicturesInfo(int minRow, int maxRow, int minCol, int maxCol, Byte[] pictureData)        {            this.MinRow = minRow;            this.MaxRow = maxRow;            this.MinCol = minCol;            this.MaxCol = maxCol;            this.PictureData = pictureData;        }    }

excel插件扩展类

public static class NpoiExtend    {        public static List<PicturesInfo> GetAllPictureInfos(this ISheet sheet)        {            return sheet.GetAllPictureInfos(null, null, null, null);        }        public static List<PicturesInfo> GetAllPictureInfos(this ISheet sheet, int? minRow, int? maxRow, int? minCol, int? maxCol, bool onlyInternal = true)        {             if (sheet is HSSFSheet) //2003            {                return GetAllPictureInfos((HSSFSheet)sheet, minRow, maxRow, minCol, maxCol, onlyInternal);            }            else if (sheet is XSSFSheet) //2007            {                 return GetAllPictureInfos((XSSFSheet)sheet, minRow, maxRow, minCol, maxCol, onlyInternal);            }             else            {                 throw new Exception("未处理类型，没有为该类型添加：GetAllPicturesInfos()扩展方法！");             }         }         private static List<PicturesInfo> GetAllPictureInfos(HSSFSheet sheet, int? minRow, int? maxRow, int? minCol, int? maxCol, bool onlyInternal)        {             List<PicturesInfo> picturesInfoList = new List<PicturesInfo>();            var shapeContainer = sheet.DrawingPatriarch as HSSFShapeContainer;            if (null != shapeContainer)            {                var shapeList = shapeContainer.Children;                 foreach (var shape in shapeList)                {                     if (shape is HSSFPicture && shape.Anchor is HSSFClientAnchor)                     {                         var picture = (HSSFPicture)shape;                        var anchor = (HSSFClientAnchor)shape.Anchor;                        if (IsInternalOrIntersect(minRow, maxRow, minCol, maxCol, anchor.Row1, anchor.Row2, anchor.Col1, anchor.Col2, onlyInternal))                        {                            picturesInfoList.Add(new PicturesInfo(anchor.Row1, anchor.Row2, anchor.Col1, anchor.Col2, picture.PictureData.Data));                         }                     }                }             }             return picturesInfoList;        }        private static List<PicturesInfo> GetAllPictureInfos(XSSFSheet sheet, int? minRow, int? maxRow, int? minCol, int? maxCol, bool onlyInternal)        {            List<PicturesInfo> picturesInfoList = new List<PicturesInfo>();            var documentPartList = sheet.GetRelations();            foreach (var documentPart in documentPartList)             {                if (documentPart is XSSFDrawing)                 {                    var drawing = (XSSFDrawing)documentPart;                    var shapeList = drawing.GetShapes();                     foreach (var shape in shapeList)                     {                         if (shape is XSSFPicture)                        {                             var picture = (XSSFPicture)shape;                            //var anchor = picture.GetPreferredSize();                            var anchor =(XSSFClientAnchor) shape.GetAnchor();                            if (IsInternalOrIntersect(minRow, maxRow, minCol, maxCol, anchor.Row1, anchor.Row2, anchor.Col1, anchor.Col2, onlyInternal))                            {                                 picturesInfoList.Add(new PicturesInfo(anchor.Row1, anchor.Row2, anchor.Col1, anchor.Col2, picture.PictureData.Data));                            }                        }                    }                }            }            return picturesInfoList;         }         private static bool IsInternalOrIntersect(int? rangeMinRow, int? rangeMaxRow, int? rangeMinCol, int? rangeMaxCol, int pictureMinRow, int pictureMaxRow, int pictureMinCol, int pictureMaxCol, bool onlyInternal) {             int _rangeMinRow = rangeMinRow ?? pictureMinRow;             int _rangeMaxRow = rangeMaxRow ?? pictureMaxRow;            int _rangeMinCol = rangeMinCol ?? pictureMinCol;             int _rangeMaxCol = rangeMaxCol ?? pictureMaxCol;             if (onlyInternal)             {                return (_rangeMinRow <= pictureMinRow && _rangeMaxRow >= pictureMaxRow && _rangeMinCol <= pictureMinCol && _rangeMaxCol >= pictureMaxCol);             }            else            {                return ((Math.Abs(_rangeMaxRow - _rangeMinRow) + Math.Abs(pictureMaxRow - pictureMinRow) >= Math.Abs(_rangeMaxRow + _rangeMinRow - pictureMaxRow - pictureMinRow)) && (Math.Abs(_rangeMaxCol - _rangeMinCol) + Math.Abs(pictureMaxCol - pictureMinCol) >= Math.Abs(_rangeMaxCol + _rangeMinCol - pictureMaxCol - pictureMinCol)));            }        }         }

应用测试

    #region 应用测试        public static List<PicturesInfo> GetTableFromExcel(HttpPostedFile fileData)        {            try            {                                if (fileData != null)                {                    if (fileData.ContentLength == 0)                    {                                               return null;                    }                }                Stream streamfile = fileData.InputStream;                XSSFWorkbook hssfworkbook = new XSSFWorkbook(streamfile);//2007以上版本                                NPOI.SS.UserModel.ISheet sheet = hssfworkbook.GetSheetAt(0);                DataTable table = new DataTable();                IRow headerRow = sheet.GetRow(0);//第一行为标题行                    int cellCount = headerRow.LastCellNum;//LastCellNum = PhysicalNumberOfCells                    int rowCount = sheet.LastRowNum;//LastRowNum = PhysicalNumberOfRows - 1                    //handling header.                    for (int i = headerRow.FirstCellNum; i < cellCount; i++)                {                    DataColumn column = new DataColumn(headerRow.GetCell(i).StringCellValue);                    table.Columns.Add(column);                }                for (int i = (sheet.FirstRowNum + 1); i <= rowCount; i++)                {                    IRow row = sheet.GetRow(i);                    DataRow dataRow = table.NewRow();                    if (row != null)                    {                        for (int j = row.FirstCellNum+1; j <= cellCount; j++)                        {                            if (row.GetCell(j) != null)                                dataRow[j] = GetCellValue(row.GetCell(j));                        }                    }                    table.Rows.Add(dataRow);                }                              List<PicturesInfo> picture_list = new List<PicturesInfo>();                picture_list = NpoiExtend.GetAllPictureInfos(sheet, 1, rowCount, 0, cellCount, false);                return picture_list;                           }            catch (Exception ex)            {                return null;                          }        }        /// <summary>            /// 根据Excel列类型获取列的值            /// </summary>            /// <param name="cell">Excel列</param>            /// <returns></returns>            private static string GetCellValue(ICell cell)        {            if (cell == null)                return string.Empty;            switch (cell.CellType)            {                case CellType.Blank:                    return string.Empty;                case CellType.Boolean:                    return cell.BooleanCellValue.ToString();                case CellType.Error:                    return cell.ErrorCellValue.ToString();                case CellType.Numeric:                case CellType.Unknown:                default:                    return cell.ToString();                case CellType.String:                    return cell.StringCellValue;                case CellType.Formula:                    try                    {                        HSSFFormulaEvaluator e = new HSSFFormulaEvaluator(cell.Sheet.Workbook);                        e.EvaluateInCell(cell);                        return cell.ToString();                    }                    catch                    {                        return cell.NumericCellValue.ToString();                    }            }        }           #endregion

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