如何把Excel中的数据导入到数据库
NPOI：
using NPOI.HSSF.UserModel; using NPOI.SS.Formula.Eval; using NPOI.SS.UserModel; using NPOI.XSSF.UserModel; using System; using System.Data; using System.IO; namespace ZZAS.HNYZ.GPSInstallManage.Common { public class ExcelHelper : IDisposable { private string fileName = null; //文件名 private IWorkbook workbook = null; private FileStream fs = null; private bool disposed; public ExcelHelper(string fileName) { this.fileName = fileName; disposed = false; } /// <summary> /// 将DataTable数据导入到excel中 /// </summary> /// <param name="data">要导入的数据</param> /// <param name="isColumnWritten">DataTable的列名是否要导入</param> /// <param name="sheetName">要导入的excel的sheet的名称</param> /// <returns>导入数据行数(包含列名那一行)</returns> public int DataTableToExcel(DataTable data, string sheetName, bool isColumnWritten) { int i = 0; int j = 0; int count = 0; ISheet sheet = null; fs = new FileStream(fileName, FileMode.OpenOrCreate, FileAccess.ReadWrite); if (fileName.IndexOf(".xlsx") > 0) // 2007版本 workbook = new XSSFWorkbook(); else if (fileName.IndexOf(".xls") > 0) // 2003版本 workbook = new HSSFWorkbook(); try { if (workbook != null) { sheet = workbook.CreateSheet(sheetName); } else { return -1; } if (isColumnWritten == true) //写入DataTable的列名 { IRow row = sheet.CreateRow(0); for (j = 0; j < data.Columns.Count; ++j) { row.CreateCell(j).SetCellValue(data.Columns[j].ColumnName); } count = 1; } else { count = 0; } for (i = 0; i < data.Rows.Count; ++i) { IRow row = sheet.CreateRow(count); for (j = 0; j < data.Columns.Count; ++j) { row.CreateCell(j).SetCellValue(data.Rows[i][j].ToString()); } ++count; } workbook.Write(fs); //写入到excel return count; } catch (Exception ex) { Console.WriteLine("Exception: " + ex.Message); return -1; } } /// <summary> /// 将excel中的数据导入到DataTable中 /// </summary> /// <param name="sheetName">excel工作薄sheet的名称</param> /// <param name="isFirstRowColumn">第一行是否是DataTable的列名</param> /// <returns>返回的DataTable</returns> public DataTable ExcelToDataTable(string sheetName, bool isFirstRowColumn) { ISheet sheet = null; DataTable data = new DataTable(); int startRow = 0; fs = new FileStream(fileName, FileMode.Open, FileAccess.Read); if (fileName.IndexOf(".xlsx") > 0) // 2007版本 workbook = new XSSFWorkbook(fs); else if (fileName.IndexOf(".xls") > 0) // 2003版本 workbook = new HSSFWorkbook(fs); if (sheetName != null) { sheet = workbook.GetSheet(sheetName); if (sheet == null) //如果没有找到指定的sheetName对应的sheet，则尝试获取第一个sheet { sheet = workbook.GetSheetAt(0); } } else { sheet = workbook.GetSheetAt(0); } if (sheet != null) { IRow firstRow = sheet.GetRow(0); int cellCount = firstRow.LastCellNum; //一行最后一个cell的编号 即总的列数 if (isFirstRowColumn) { for (int i = firstRow.FirstCellNum; i < cellCount; ++i) { ICell cell = firstRow.GetCell(i); if (cell != null) { string cellValue = cell.StringCellValue; if (cellValue != null) { DataColumn column = new DataColumn(cellValue, typeof(string)); data.Columns.Add(column); } } } startRow = sheet.FirstRowNum + 1; } else { startRow = sheet.FirstRowNum; } //最后一行的编号 int rowCount = sheet.LastRowNum; for (int i = startRow; i < rowCount; ++i) { IRow row = sheet.GetRow(i); if (row == null) continue; //没有数据的行默认是null DataRow dataRow = data.NewRow(); for (int j = row.FirstCellNum; j < cellCount; ++j) { if (row.GetCell(j) == null) { continue; } switch (row.GetCell(j).CellType) { case CellType.Boolean: dataRow[j] = row.GetCell(j).BooleanCellValue; break; case CellType.Error: dataRow[j] = ErrorEval.GetText(row.GetCell(j).ErrorCellValue); break; case CellType.Formula: switch (row.GetCell(j).CachedFormulaResultType) { case CellType.Boolean: dataRow[j] = row.GetCell(j).BooleanCellValue; break; case CellType.Error: dataRow[j] = ErrorEval.GetText(row.GetCell(j).ErrorCellValue); break; case CellType.Numeric: if (DateUtil.IsCellDateFormatted(row.GetCell(j))) { dataRow[j] = row.GetCell(j).DateCellValue.ToString("yyyy-MM-dd"); } else { dataRow[j] = row.GetCell(j).NumericCellValue; } break; case CellType.String: string str = row.GetCell(j).StringCellValue; if (!string.IsNullOrEmpty(str)) { dataRow[j] = str.ToString(); } else { dataRow[j] = null; } break; case CellType.Unknown: case CellType.Blank: default: dataRow[j] = string.Empty; break; } break; case CellType.Numeric: if (DateUtil.IsCellDateFormatted(row.GetCell(j))) { dataRow[j] = row.GetCell(j).DateCellValue.ToString("yyyy-MM-dd"); } else { dataRow[j] = row.GetCell(j).NumericCellValue; } break; case CellType.String: string strValue = row.GetCell(j).StringCellValue; if (!string.IsNullOrEmpty(strValue)) { dataRow[j] = strValue.ToString(); } else { dataRow[j] = null; } break; case CellType.Unknown: case CellType.Blank: default: dataRow[j] = string.Empty; break; } } data.Rows.Add(dataRow); } } return data; } public void Dispose() { Dispose(true); GC.SuppressFinalize(this); } protected virtual void Dispose(bool disposing) { if (!this.disposed) { if (disposing) { if (fs != null) fs.Close(); } fs = null; disposed = true; } } } }
Excel：
public static System.Data.DataTable GetExcelDatatable(string fileUrl, string table) { //office2007之前 仅支持.xls //const string cmdText = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source={0};Extended Properties='Excel 8.0;IMEX=1';"; //支持.xls和.xlsx，即包括office2010等版本的 HDR=Yes代表第一行是标题，不是数据； const string cmdText = "Provider=Microsoft.Ace.OleDb.12.0;Data Source={0};Extended Properties='Excel 12.0; HDR=Yes; IMEX=1'"; System.Data.DataTable dt = null; //建立连接 OleDbConnection conn = new OleDbConnection(string.Format(cmdText, fileUrl)); try { //打开连接 if (conn.State == ConnectionState.Broken || conn.State == ConnectionState.Closed) { conn.Open(); } System.Data.DataTable schemaTable = conn.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, null); //获取Excel的第一个Sheet名称 string sheetName = schemaTable.Rows[0]["TABLE_NAME"].ToString().Trim(); //查询sheet中的数据 string strSql = "select * from [" + sheetName + "]"; OleDbDataAdapter da = new OleDbDataAdapter(strSql, conn); DataSet ds = new DataSet(); da.Fill(ds, table); dt = ds.Tables[0]; return dt; } catch (Exception exc) { throw exc; } finally { conn.Close(); conn.Dispose(); } }
