NPOI操作Excel

Posted 2020-08-17 wes

创建Excel

 1         #region 操作Excel
 2 
 3         private void ToReadSimpleExcel()
 4         {
 5             StringBuilder builder = new StringBuilder();
 6             using (FileStream fs = File.OpenRead(@"d:/1.xls"))
 7             {
 8                 HSSFWorkbook wk = new HSSFWorkbook(fs);
 9                 for (int i = 0; i < wk.NumberOfSheets; i++)
10                 {
11                     ISheet sheet = wk.GetSheetAt(i);
12                     for (int j = 0; j < sheet.LastRowNum; j++)
13                     {
14                         IRow row = sheet.GetRow(j);
15                         if (row != null)
16                         {
17                             builder.Append("------------");
18                             for (int k = 0; k < row.LastCellNum; k++)
19                             {
20                                 ICell cell = row.GetCell(k);
21                                 if (cell != null)
22                                 {
23                                     builder.Append(cell.ToString());
24                                 }
25                             }
26                         }
27                     }
28                 }
29                 builder.ToString();
30                 using (StreamWriter wr = new StreamWriter(new FileStream(@"d:/1.txt", FileMode.Append)))
31                 {
32                     wr.Write(builder.ToString());
33                     wr.Flush();
34                 }
35 
36             }
37 
38         }
39 
40         #endregion

向Excel中固定插入数据

 1 #region 向固定Excel中插入数据
 2 
 3 
 4         private void ToReadExcel()
 5         {
 6             HSSFWorkbook wk = new HSSFWorkbook();
 7             //创作ceshi表
 8             ISheet tb = wk.CreateSheet("ceshi");
 9             //创建一行。次行为第二行
10             IRow row = tb.CreateRow(1);
11             for (int i = 0; i < 20; i++)
12             {
13                 ICell cell = row.CreateCell(i); //在第二行中创建单元格
14                 cell.SetCellValue(i); //循环往第二个单元格中添加数据
15             }
16             using (FileStream fs = File.OpenWrite(@"c:/1.xls"))
17             {
18                 wk.Write(fs);
19             }
20         }
21 
22         #endregion

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定义单元格常用的样式枚举

 1   #region 定义单元格常用的样式枚举
 2 
 3         public enum stylexls
 4         {
 5             头,
 6             url,
 7             时间,
 8             数字,
 9             钱,
10             百分比,
11             中文大写,
12             科学计数法,
13             默认
14         }
15 
16         #endregion

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定义单元格常用到样式

  1  #region 定义单元格常用到样式
  2 
  3         private static ICellStyle Getcellstyle(IWorkbook wb, stylexls str)
  4         {
  5             ICellStyle cellStyle = wb.CreateCellStyle();
  6 
  7             //定义几种字体  
  8             //也可以一种字体，写一些公共属性，然后在下面需要时加特殊的  
  9             IFont font12 = wb.CreateFont();
 10             font12.FontHeightInPoints = 10;
 11             font12.FontName = "微软雅黑";
 12 
 13 
 14             IFont font = wb.CreateFont();
 15             font.FontName = "微软雅黑";
 16             //font.Underline = 1;下划线  
 17 
 18 
 19             IFont fontcolorblue = wb.CreateFont();
 20             fontcolorblue.Color = HSSFColor.OLIVE_GREEN.BLUE.index;
 21             fontcolorblue.IsItalic = true; //下划线  
 22             fontcolorblue.FontName = "微软雅黑";
 23 
 24 
 25             //边框  
 26             cellStyle.BorderBottom = NPOI.SS.UserModel.BorderStyle.DOTTED;
 27             cellStyle.BorderLeft = NPOI.SS.UserModel.BorderStyle.HAIR;
 28             cellStyle.BorderRight = NPOI.SS.UserModel.BorderStyle.HAIR;
 29             cellStyle.BorderTop = NPOI.SS.UserModel.BorderStyle.DOTTED;
 30             //边框颜色  
 31             cellStyle.BottomBorderColor = HSSFColor.OLIVE_GREEN.BLUE.index;
 32             cellStyle.TopBorderColor = HSSFColor.OLIVE_GREEN.BLUE.index;
 33 
 34             //背景图形，我没有用到过。感觉很丑  
 35             //cellStyle.FillBackgroundColor = HSSFColor.OLIVE_GREEN.BLUE.index;  
 36             //cellStyle.FillForegroundColor = HSSFColor.OLIVE_GREEN.BLUE.index;  
 37             cellStyle.FillForegroundColor = HSSFColor.WHITE.index;
 38             // cellStyle.FillPattern = FillPatternType.NO_FILL;  
 39             cellStyle.FillBackgroundColor = HSSFColor.BLUE.index;
 40 
 41             //水平对齐  
 42             cellStyle.Alignment = NPOI.SS.UserModel.HorizontalAlignment.LEFT;
 43 
 44             //垂直对齐  
 45             cellStyle.VerticalAlignment = VerticalAlignment.CENTER;
 46 
 47             //自动换行  
 48             cellStyle.WrapText = true;
 49 
 50             //缩进;当设置为1时，前面留的空白太大了。希旺官网改进。或者是我设置的不对  
 51             cellStyle.Indention = 0;
 52 
 53             //上面基本都是设共公的设置  
 54             //下面列出了常用的字段类型  
 55             switch (str)
 56             {
 57                 case stylexls.头:
 58                     // cellStyle.FillPattern = FillPatternType.LEAST_DOTS;  
 59                     cellStyle.SetFont(font12);
 60                     break;
 61                 case stylexls.时间:
 62                     IDataFormat datastyle = wb.CreateDataFormat();
 63 
 64                     cellStyle.DataFormat = datastyle.GetFormat("yyyy/mm/dd");
 65                     cellStyle.SetFont(font);
 66                     break;
 67                 case stylexls.数字:
 68                     cellStyle.DataFormat = HSSFDataFormat.GetBuiltinFormat("0.00");
 69                     cellStyle.SetFont(font);
 70                     break;
 71                 case stylexls.钱:
 72                     IDataFormat format = wb.CreateDataFormat();
 73                     cellStyle.DataFormat = format.GetFormat("￥#,##0");
 74                     cellStyle.SetFont(font);
 75                     break;
 76                 case stylexls.url:
 77                     fontcolorblue.Underline = 1;
 78                     cellStyle.SetFont(fontcolorblue);
 79                     break;
 80                 case stylexls.百分比:
 81                     cellStyle.DataFormat = HSSFDataFormat.GetBuiltinFormat("0.00%");
 82                     cellStyle.SetFont(font);
 83                     break;
 84                 case stylexls.中文大写:
 85                     IDataFormat format1 = wb.CreateDataFormat();
 86                     cellStyle.DataFormat = format1.GetFormat("[DbNum2][$-804]0");
 87                     cellStyle.SetFont(font);
 88                     break;
 89                 case stylexls.科学计数法:
 90                     cellStyle.DataFormat = HSSFDataFormat.GetBuiltinFormat("0.00E+00");
 91                     cellStyle.SetFont(font);
 92                     break;
 93                 case stylexls.默认:
 94                     cellStyle.SetFont(font);
 95                     break;
 96             }
 97             return cellStyle;
 98         }
 99 
100         #endregion

View Code

插入标题各种样式

 1   #region 插入标题各种样式
 2         private void CreateCommonExcel()
 3         {
 4             IWorkbook wb = new HSSFWorkbook();
 5             //创建表
 6             ISheet sh = wb.CreateSheet("zhiyuan");
 7             //设置单元的宽度
 8             sh.SetColumnWidth(0, 15 * 256);
 9             sh.SetColumnWidth(1, 35 * 256);
10             sh.SetColumnWidth(2, 15 * 256);
11             sh.SetColumnWidth(3, 10 * 256);
12             int i = 0;
13 
14             #region 合并单元格
15 
16             sh.AddMergedRegion(new NPOI.SS.Util.CellRangeAddress(0, 0, 0, 3));
17 
18             IRow row0 = sh.CreateRow(0);
19             row0.Height = 20 * 20;
20             ICell icelltop0 = row0.CreateCell(0);
21 
22             icelltop0.CellStyle = Getcellstyle(wb, stylexls.头);
23             icelltop0.SetCellValue("标题合并单元");
24 
25             #endregion
26 
27             i++;
28 
29             #region 设置表头
30 
31             IRow row1 = sh.CreateRow(1);
32             row1.Height = 20 * 20;
33             ICell iCell = row1.CreateCell(0);
34             iCell.CellStyle = Getcellstyle(wb, stylexls.头);
35             iCell.SetCellValue("网站名");
36             ICell iCell2 = row1.CreateCell(1);
37             iCell2.CellStyle = Getcellstyle(wb, stylexls.头);
38             iCell2.SetCellValue("网址");
39             ICell iCell3 = row1.CreateCell(2);
40             iCell3.CellStyle = Getcellstyle(wb, stylexls.头);
41             iCell3.SetCellValue("百度快照");
42             ICell iCell4 = row1.CreateCell(3);
43             iCell4.CellStyle = Getcellstyle(wb, stylexls.头);
44             iCell4.SetCellValue("百度收录");
45 
46             using (FileStream st = File.OpenWrite(@"d:/ceshi.xls"))
47             {
48                 wb.Write(st);
49                 System.Web.HttpContext.Current.Response.Write("<script>alert(\'成功\')</script>");
50             }
51 
52             #endregion
53         } 
54         #endregion

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