将excel文件内容读取到datatable数据表中,支持97-2003和2007两种版本的excel
1.第一种是根据excel文件路径读取excel并返回datatable
1 /// <summary>
2 /// 将excel文件内容读取到DataTable数据表中
3 /// </summary>
4 /// <param name="fileName">文件完整路径名</param>
5 /// <param name="sheetName">指定读取excel工作薄sheet的名称</param>
6 /// <param name="isFirstRowColumn">第一行是否是DataTable的列名：true=是，false=否</param>
7 /// <returns>DataTable数据表</returns>
8 public static DataTable ReadExcelToDataTable(string fileName, string sheetName = null, bool isFirstRowColumn = true)
9 {
10 //定义要返回的datatable对象
11 DataTable data = new DataTable();
12 //excel工作表
13 Npoi.SS.UserModel.ISheet sheet = null;
14 //数据开始行(排除标题行)
15 int startRow = 0;
16 try
17 {
18 if (!File.Exists(fileName))
19 {
20 return null;
21 }
22 //根据指定路径读取文件
23 FileStream fs = new FileStream(fileName, FileMode.Open, FileAccess.Read);
24 //根据文件流创建excel数据结构
25 Npoi.SS.UserModel.IWorkbook workbook = Npoi.SS.UserModel.WorkbookFactory.Create(fs);
26 //IWorkbook workbook = new HSSFWorkbook(fs);
27 //如果有指定工作表名称
28 if (!string.IsNullOrEmpty(sheetName))
29 {
30 sheet = workbook.GetSheet(sheetName);
31 //如果没有找到指定的sheetName对应的sheet，则尝试获取第一个sheet
32 if (sheet == null)
33 {
34 sheet = workbook.GetSheetAt(0);
35 }
36 }
37 else
38 {
39 //如果没有指定的sheetName，则尝试获取第一个sheet
40 sheet = workbook.GetSheetAt(0);
41 }
42 if (sheet != null)
43 {
44 Npoi.SS.UserModel.IRow firstRow = sheet.GetRow(0);
45 //一行最后一个cell的编号 即总的列数
46 int cellCount = firstRow.LastCellNum;
47 //如果第一行是标题列名
48 if (isFirstRowColumn)
49 {
50 for (int i = firstRow.FirstCellNum; i < cellCount; ++i)
51 {
52 Npoi.SS.UserModel.ICell cell = firstRow.GetCell(i);
53 if (cell != null)
54 {
55 string cellValue = cell.StringCellValue;
56 if (cellValue != null)
57 {
58 DataColumn column = new DataColumn(cellValue);
59 data.Columns.Add(column);
60 }
61 }
62 }
63 startRow = sheet.FirstRowNum + 1;
64 }
65 else
66 {
67 startRow = sheet.FirstRowNum;
68 }
69 //最后一列的标号
70 int rowCount = sheet.LastRowNum;
71 for (int i = startRow; i <= rowCount; ++i)
72 {
73 Npoi.SS.UserModel.IRow row = sheet.GetRow(i);
74 if (row == null) continue; //没有数据的行默认是null
75
76 DataRow dataRow = data.NewRow();
77 for (int j = row.FirstCellNum; j < cellCount; ++j)
78 {
79 if (row.GetCell(j) != null) //同理，没有数据的单元格都默认是null
80 dataRow[j] = row.GetCell(j).ToString();
81 }
82 data.Rows.Add(dataRow);
83 }
84 }
85 return data;
86 }
87 catch (Exception ex)
88 {
89 throw ex;
90 }
91 }
2.第二种是将excel文件流读取到datatable中
1 /// <summary>
2 /// 将文件流读取到DataTable数据表中
3 /// </summary>
4 /// <param name="fileStream">文件流</param>
5 /// <param name="sheetName">指定读取excel工作薄sheet的名称</param>
6 /// <param name="isFirstRowColumn">第一行是否是DataTable的列名：true=是，false=否</param>
7 /// <returns>DataTable数据表</returns>
8 public static DataTable ReadStreamToDataTable(Stream fileStream, string sheetName = null, bool isFirstRowColumn = true)
9 {
10 //定义要返回的datatable对象
11 DataTable data = new DataTable();
12 //excel工作表
13 Npoi.SS.UserModel.ISheet sheet = null;
14 //数据开始行(排除标题行)
15 int startRow = 0;
16 try
17 {
18 //根据文件流创建excel数据结构,NPOI的工厂类WorkbookFactory会自动识别excel版本，创建出不同的excel数据结构
19 Npoi.SS.UserModel.IWorkbook workbook = Npoi.SS.UserModel.WorkbookFactory.Create(fileStream);
20 //如果有指定工作表名称
21 if (!string.IsNullOrEmpty(sheetName))
22 {
23 sheet = workbook.GetSheet(sheetName);
24 //如果没有找到指定的sheetName对应的sheet，则尝试获取第一个sheet
25 if (sheet == null)
26 {
27 sheet = workbook.GetSheetAt(0);
28 }
29 }
30 else
31 {
32 //如果没有指定的sheetName，则尝试获取第一个sheet
33 sheet = workbook.GetSheetAt(0);
34 }
35 if (sheet != null)
36 {
37 Npoi.SS.UserModel.IRow firstRow = sheet.GetRow(0);
38 //一行最后一个cell的编号 即总的列数
39 int cellCount = firstRow.LastCellNum;
40 //如果第一行是标题列名
41 if (isFirstRowColumn)
42 {
43 for (int i = firstRow.FirstCellNum; i < cellCount; ++i)
44 {
45 Npoi.SS.UserModel.ICell cell = firstRow.GetCell(i);
46 if (cell != null)
47 {
48 string cellValue = cell.StringCellValue;
49 if (cellValue != null)
50 {
51 DataColumn column = new DataColumn(cellValue);
52 data.Columns.Add(column);
53 }
54 }
55 }
56 startRow = sheet.FirstRowNum + 1;
57 }
58 else
59 {
60 startRow = sheet.FirstRowNum;
61 }
62 //最后一列的标号
63 int rowCount = sheet.LastRowNum;
64 for (int i = startRow; i <= rowCount; ++i)
65 {
66 Npoi.SS.UserModel.IRow row = sheet.GetRow(i);
67 if (row == null || row.FirstCellNum < 0) continue; //没有数据的行默认是null
68
69 DataRow dataRow = data.NewRow();
70 for (int j = row.FirstCellNum; j < cellCount; ++j)
71 {
72 //同理，没有数据的单元格都默认是null
73 Npoi.SS.UserModel.ICell cell = row.GetCell(j);
74 if (cell != null)
75 {
76 if (cell.CellType == Npoi.SS.UserModel.CellType.Numeric)
77 {
78 //判断是否日期类型
79 if (Npoi.SS.UserModel.DateUtil.IsCellDateFormatted(cell))
80 {
81 dataRow[j] = row.GetCell(j).DateCellValue;
82 }
83 else
84 {
85 dataRow[j] = row.GetCell(j).ToString().Trim();
86 }
87 }
88 else
89 {
90 dataRow[j] = row.GetCell(j).ToString().Trim();
91 }
92 }
93 }
94 data.Rows.Add(dataRow);
95 }
96 }
97 return data;
98 }
99 catch (Exception ex)
100 {
101 throw ex;
102 }
103 }
时间： 2024-10-15 18:02:22