dateTable导出到excel的MemoryStream
1 /// <summary> 2 /// DataTable导出到Excel的MemoryStream Export() 3 /// </summary> 4 /// <param name="dtSource">DataTable数据源</param> 5 /// <param name="excelConfig">导出设置包含文件名、标题、列设置</param> 6 /// <param name="isRemoveColumns"></param> 7 public static MemoryStream ExportMemoryStream(DataTable dtSource, ExcelConfig excelConfig, bool isRemoveColumns = false) 8 { 9 if (isRemoveColumns) 10 { 11 int colint = 0; 12 for (int i = 0; i < dtSource.Columns.Count; ) 13 { 14 DataColumn column = dtSource.Columns[i]; 15 if (colint>=excelConfig.ColumnEntity.Count || excelConfig.ColumnEntity[colint].Column != column.ColumnName) 16 { 17 dtSource.Columns.Remove(column.ColumnName); 18 } 19 else 20 { 21 ColumnEntity columnentity = excelConfig.ColumnEntity.Find(t => t.Column == dtSource.Columns[i].ColumnName); 22 dtSource.Columns[i].ColumnName = columnentity.ExcelColumn;//修改列头名 23 i++; 24 colint++; 25 } 26 27 } 28 } 29 30 31 HSSFWorkbook workbook = new HSSFWorkbook(); 32 ISheet sheet = workbook.CreateSheet(); 33 34 #region 右击文件 属性信息 35 { 36 DocumentSummaryInformation dsi = PropertySetFactory.CreateDocumentSummaryInformation(); 37 dsi.Company = "NPOI"; 38 workbook.DocumentSummaryInformation = dsi; 39 40 SummaryInformation si = PropertySetFactory.CreateSummaryInformation(); 41 si.Author = "zdd"; //填加xls文件作者信息 42 si.ApplicationName = "XX系统"; //填加xls文件创建程序信息 43 si.LastAuthor = "zdd"; //填加xls文件最后保存者信息 44 si.Comments = "zdd"; //填加xls文件作者信息 45 si.Title = "标题信息"; //填加xls文件标题信息 46 si.Subject = "主题信息";//填加文件主题信息 47 si.CreateDateTime = System.DateTime.Now; 48 workbook.SummaryInformation = si; 49 } 50 #endregion 51 52 #region 设置标题样式 53 ICellStyle headStyle = workbook.CreateCellStyle(); 54 int[] arrColWidth = new int[dtSource.Columns.Count]; 55 string[] arrColName = new string[dtSource.Columns.Count];//列名 56 ICellStyle[] arryColumStyle = new ICellStyle[dtSource.Columns.Count];//样式表 57 headStyle.Alignment = HorizontalAlignment.Center; // ------------------ 58 if (excelConfig.Background != new Color()) 59 { 60 if (excelConfig.Background != new Color()) 61 { 62 headStyle.FillPattern = FillPattern.SolidForeground; 63 headStyle.FillForegroundColor = GetXLColour(workbook, excelConfig.Background); 64 } 65 } 66 IFont font = workbook.CreateFont(); 67 font.FontHeightInPoints = excelConfig.TitlePoint; 68 if (excelConfig.ForeColor != new Color()) 69 { 70 font.Color = GetXLColour(workbook, excelConfig.ForeColor); 71 } 72 font.Boldweight = 700; 73 headStyle.SetFont(font); 74 #endregion 75 76 #region 列头及样式 77 ICellStyle cHeadStyle = workbook.CreateCellStyle(); 78 cHeadStyle.Alignment = HorizontalAlignment.Center; // ------------------ 79 IFont cfont = workbook.CreateFont(); 80 cfont.FontHeightInPoints = excelConfig.HeadPoint; 81 cHeadStyle.SetFont(cfont); 82 #endregion 83 84 #region 设置内容单元格样式 85 foreach (DataColumn item in dtSource.Columns) 86 { 87 ICellStyle columnStyle = workbook.CreateCellStyle(); 88 columnStyle.Alignment = HorizontalAlignment.Center; 89 arrColWidth[item.Ordinal] = Encoding.GetEncoding(936).GetBytes(item.ColumnName.ToString()).Length; 90 arrColName[item.Ordinal] = item.ColumnName.ToString(); 91 if (excelConfig.ColumnEntity != null) 92 { 93 ColumnEntity columnentity = excelConfig.ColumnEntity.Find(t => t.Column == item.ColumnName); 94 if (columnentity != null) 95 { 96 arrColName[item.Ordinal] = columnentity.ExcelColumn; 97 if (columnentity.Width != 0) 98 { 99 arrColWidth[item.Ordinal] = columnentity.Width; 100 } 101 if (columnentity.Background != new Color()) 102 { 103 if (columnentity.Background != new Color()) 104 { 105 columnStyle.FillPattern = FillPattern.SolidForeground; 106 columnStyle.FillForegroundColor = GetXLColour(workbook, columnentity.Background); 107 } 108 } 109 if (columnentity.Font != null || columnentity.Point != 0 || columnentity.ForeColor != new Color()) 110 { 111 IFont columnFont = workbook.CreateFont(); 112 columnFont.FontHeightInPoints = 10; 113 if (columnentity.Font != null) 114 { 115 columnFont.FontName = columnentity.Font; 116 } 117 if (columnentity.Point != 0) 118 { 119 columnFont.FontHeightInPoints = columnentity.Point; 120 } 121 if (columnentity.ForeColor != new Color()) 122 { 123 columnFont.Color = GetXLColour(workbook, columnentity.ForeColor); 124 } 125 columnStyle.SetFont(font); 126 } 127 columnStyle.Alignment = getAlignment(columnentity.Alignment); 128 } 129 } 130 arryColumStyle[item.Ordinal] = columnStyle; 131 } 132 if (excelConfig.IsAllSizeColumn) 133 { 134 #region 根据列中最长列的长度取得列宽 135 for (int i = 0; i < dtSource.Rows.Count; i++) 136 { 137 for (int j = 0; j < dtSource.Columns.Count; j++) 138 { 139 if (arrColWidth[j] != 0) 140 { 141 int intTemp = Encoding.GetEncoding(936).GetBytes(dtSource.Rows[i][j].ToString()).Length; 142 if (intTemp > arrColWidth[j]) 143 { 144 arrColWidth[j] = intTemp; 145 } 146 } 147 148 } 149 } 150 #endregion 151 } 152 #endregion 153 154 #region 填充数据 155 156 #endregion 157 158 ICellStyle dateStyle = workbook.CreateCellStyle(); 159 IDataFormat format = workbook.CreateDataFormat(); 160 dateStyle.DataFormat = format.GetFormat("yyyy-mm-dd"); 161 int rowIndex = 0; 162 foreach (DataRow row in dtSource.Rows) 163 { 164 #region 新建表，填充表头，填充列头，样式 165 if (rowIndex == 65535 || rowIndex == 0) 166 { 167 if (rowIndex != 0) 168 { 169 sheet = workbook.CreateSheet(); 170 } 171 172 #region 表头及样式 173 { 174 if (excelConfig.Title != null) 175 { 176 IRow headerRow = sheet.CreateRow(0); 177 if (excelConfig.TitleHeight != 0) 178 { 179 headerRow.Height = (short)(excelConfig.TitleHeight * 20); 180 } 181 headerRow.HeightInPoints = 25; 182 headerRow.CreateCell(0).SetCellValue(excelConfig.Title); 183 headerRow.GetCell(0).CellStyle = headStyle; 184 sheet.AddMergedRegion(new NPOI.SS.Util.CellRangeAddress(0, 0, 0, dtSource.Columns.Count - 1)); // ------------------ 185 } 186 187 } 188 #endregion 189 190 #region 列头及样式 191 { 192 IRow headerRow = sheet.CreateRow(1); 193 #region 如果设置了列标题就按列标题定义列头，没定义直接按字段名输出 194 foreach (DataColumn column in dtSource.Columns) 195 { 196 headerRow.CreateCell(column.Ordinal).SetCellValue(arrColName[column.Ordinal]); 197 headerRow.GetCell(column.Ordinal).CellStyle = cHeadStyle; 198 //设置列宽 199 sheet.SetColumnWidth(column.Ordinal, (arrColWidth[column.Ordinal] + 1) * 256); 200 } 201 #endregion 202 } 203 #endregion 204 205 rowIndex = 2; 206 } 207 #endregion 208 209 #region 填充内容 210 IRow dataRow = sheet.CreateRow(rowIndex); 211 212 213 214 foreach (DataColumn column in dtSource.Columns) 215 { 216 ICell newCell = dataRow.CreateCell(column.Ordinal); 217 newCell.CellStyle = arryColumStyle[column.Ordinal]; 218 string drValue = row[column].ToString(); 219 220 //如果是图片列 221 if (column.ToString() == "图片") 222 { 223 224 225 226 string tPath = DirFileHelper.MapPath("/ExportFile/ImageFiles/");//服务器图片存储目录 227 if (!DirFileHelper.IsExistDirectory(tPath))//判断是否存在此目录 无则创建 228 { 229 DirFileHelper.CreateDir("/ExportFile/ImageFiles/");//创建临时存储压缩后图片路径 230 } 231 string filePath = SharedImagePath + drValue; 232 string newImagePath = tPath + drValue;//压缩后图片绝对路径 233 if (DirFileHelper.IsExistFile(newImagePath))//若果本地已存在 则不从100共享盘中取图片 234 { 235 byte[] bytes = System.IO.File.ReadAllBytes(newImagePath); 236 int pictureIndex = workbook.AddPicture(bytes, PictureType.JPEG); 237 HSSFPatriarch par = sheet.CreateDrawingPatriarch() as HSSFPatriarch; 238 239 HSSFClientAnchor anchor = new HSSFClientAnchor 240 { 241 Dx1 = 0,//起始单元格的x偏移量，如例子中的255表示直线起始位置距A1单元格左侧的距离； 242 Dy1 = 0,//起始单元格的y偏移量，如例子中的125表示直线起始位置距A1单元格上侧的距离； 243 Dx2 = 0,//终止单元格的x偏移量，如例子中的1023表示直线起始位置距C3单元格左侧的距离； 244 Dy2 = 0,//：终止单元格的y偏移量，如例子中的150表示直线起始位置距C3单元格上侧的距离； 245 Col1 = column.Ordinal +1, //批注起始位置的纵坐标（当前单元格位置+2） 246 Col2 = column.Ordinal + 6, //批注结束位置的纵坐标 247 Row1 = column.Ordinal + 0, //批注起始位置的横坐标 248 Row2 = column.Ordinal + 17 //批注结束位置的横坐标 249 }; 250 HSSFComment comment = par.CreateComment(anchor); 251 comment.SetBackgroundImage(pictureIndex); 252 newCell.CellComment = comment; 253 } 254 else//取100共享盘图片并压缩指定大小 255 { 256 if (DirFileHelper.IsExistFile(filePath))//需要增加判断是否存在此图片 257 { 258 ImageHelper.CreateMinImageAndDel(filePath, 300, 400, tPath);//压缩指定大小图片 259 byte[] bytes = System.IO.File.ReadAllBytes(newImagePath); 260 int pictureIndex = workbook.AddPicture(bytes, PictureType.JPEG); 261 HSSFPatriarch par = sheet.CreateDrawingPatriarch() as HSSFPatriarch; 262 HSSFClientAnchor anchor = new HSSFClientAnchor 263 { 264 Dx1 = 0,//起始单元格的x偏移量，如例子中的255表示直线起始位置距A1单元格左侧的距离； 265 Dy1 = 0,//起始单元格的y偏移量，如例子中的125表示直线起始位置距A1单元格上侧的距离； 266 Dx2 = 0,//终止单元格的x偏移量，如例子中的1023表示直线起始位置距C3单元格左侧的距离； 267 Dy2 = 0,//：终止单元格的y偏移量，如例子中的150表示直线起始位置距C3单元格上侧的距离； 268 Col1 = column.Ordinal + 2, //批注起始位置的纵坐标（当前单元格位置+2） 269 Col2 = column.Ordinal + 6, //批注结束位置的纵坐标 270 Row1 = column.Ordinal + 0, //批注起始位置的横坐标 271 Row2 = column.Ordinal + 17 //批注结束位置的横坐标 272 }; 273 HSSFComment comment = par.CreateComment(anchor); 274 comment.SetBackgroundImage(pictureIndex); 275 } 276 } 277 //newCell.SetCellValue(drValue); 278 SetCell(newCell, dateStyle, column.DataType, drValue); 279 } 280 else 281 { 282 SetCell(newCell, dateStyle, column.DataType, drValue); 283 } 284 285 286 } 287 #endregion 288 rowIndex++; 289 } 290 using (MemoryStream ms = new MemoryStream()) 291 { 292 workbook.Write(ms); 293 ms.Flush(); 294 ms.Position = 0; 295 return ms; 296 } 297 } 298 #endregion