在导入前都需要将上传的文件保存到服务器,所以避免重复的写这些代码,先贴出上传文件并保存到服务器指定路径的代码
protected void btnImport_Click(object sender,EventArgs e)
{
Random random=new Random();
ImportClass Import=new ImportClass();
//保存文件的虚拟路径
string path="Import/";
//获取选择的文件名
string fileName=FileUpload.FileName;
//获取文件扩展名称
string fileExt=Path.GetExtension(fileName);
//生成新文件名
string newName=DateTime.Now.ToString("yyyyMMddHHmmssfff")+random.Next(0,9999).ToString();
//获取指定虚拟机路径的物理路径
string fullPath=HttpContext.Current.Server.MapPath(path);
//上传文件保存路径
string savePath=fullPath+newName+fileExt;
//保存文件到服务器
FileUpload1.SaveAs(savePath);
try{
//获取导入的数据
DataSet ds=Import.ImportExcel(savePath);
if(ds !=null&&ds.Tables.Count>0)
{
//这里可以写插入数据库的方法
}
}
catch(Exception ex)
{
throw;
}
}
第一种:
public DataSet ImportExcel(string filePath)
{
DataSet ds=null;
OleDbConnection conn;
string strConn=string.Empty;
string sheetName=string.Empty;
try { // Excel 2003 版本连接字符串 strConn = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + filePath + ";Extended Properties=‘Excel 8.0; HDR=YES; IMEX=1;‘"; conn = new OleDbConnection(strConn); conn.Open(); } catch { // Excel 2007 以上版本连接字符串 strConn = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + filePath + ";Extended Properties=‘Excel 12.0;HDR=Yes;IMEX=1;‘"; conn = new OleDbConnection(strConn); conn.Open(); } //获取所有的 sheet 表 DataTable dtSheetName = conn.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, new object[] { null, null, null, "Table" }); ds = new DataSet(); for (int i = 0; i < dtSheetName.Rows.Count; i++) { DataTable dt = new DataTable(); dt.TableName = "table" + i.ToString(); //获取表名 sheetName = dtSheetName.Rows[i]["TABLE_NAME"].ToString(); OleDbDataAdapter oleda = new OleDbDataAdapter("select * from [" + sheetName + "]", conn); oleda.Fill(dt); ds.Tables.Add(dt); } //关闭连接,释放资源 conn.Close(); conn.Dispose(); return ds; }除了读取过程不太灵活之外,这种读取方式还有个弊端就是,当Excel数据量很大时,会非常占用内存,当内存不够时会抛出内存溢出的异常,不过一般的都适用了。第二种:Microsoft.Office.Interop.Excel.dllpublic DataSet ImportExcel(string filePath){ DataSet ds=null;DataTable dt=null;Microsoft.Office.Interop.Excel.Application excel=new Microsoft.Office.Interop.Excel.Application();Microsoft.Office.Interop.Excel.Workbook workbook=null;Microsoft.Office.Interop.Excel.Worksheet worksheet=null;Microsoft.Office.Interop.Excel.Sheets sheets=null;Microsoft.Office.Interop.Excel.Range range=null;object missing=System.Reflection.Missing.Value;try{if(excel==null){return null;}//打开Excel文件workbook=excel.Workbooks.Open(
filePath, missing, missing, missing, missing, missing, missing, missing, missing, missing, missing, missing, missing, missing, missing);//获取所有的sheet表sheets=workbook.Worksheets;ds=new DataSet();for(int i=1;i<=sheets.Count;i++){//获取第一个表worksheet=(Microsoft.Office.Interop.Excel.Worksheet)sheets.get_Item(i);int rowCount=worksheet.UsedRange.Rows.Count;int colCount=worksheet.UsedRange.Columns.Count;int rowIndex=1;int colIndex=1;DataColumn dc;dt=new DataTable();dt.TableName="table"+i.ToString();//读取列名for(int j=0;j<colCount;j++){ range=worksheet.Cells[rowIndex,colIndex+j];dc=new DataColumn();dc.DataType=Type.GetType("System.String");dc.ColumnName=range.Text.ToString().Trim();//添加列dt.Columns.Add(dc);}//读取行数据for(int k=1;k<rowCount;k++){DataRow dr=dt.NewRow();for(int l=0;l<colCount;l++){range=worksheet.Cells[rowIndex+k,colIndex+l];dr[l]=range.Text.ToString();}dt.Tables.Add(dt);}}catch(Exception ex){throw;}finally{workbook.Close();excel.Quit();Marshal.ReleaseComObject(worksheet);Marshal.ReleaseComObject(workbook);Marshal.ReleaseComObject(excel);worksheet=null;workbook=null;excel=null;GC.Collect();}return ds;}这种方法首先需要安装有office Excel,并且是一个单元格一个单元格的读取,所以性能会比较差第三种:NPOIpublic DataSet ImportExcel(string filePath){DataSet ds=null;try{FileStream fileStream=new FileStream(filePath,FileMode.Open);XSSFWorkbook workbook=new XSSFWorkbook(fileStream);ISheet sheet=null;IRow row=null;ds=new DataSet();DataTable dt=null;for(int i=0;i<workbook.Count;i++){dt=new DataTable();dt.TableName="table"+i.ToString();//获取sheet表sheet=workbook.GetSheetAt(i);//起始行索引int rowIndex=sheet.FirstRowNum;//获取行数int rowCount=sheet.LastRowNum;//获取第一行IRow firstRow=sheet.GetRow(rowIndex);//起始列索引int colIndex=firstRow.FirstCellNum;//获取列数int colCount=firstRow.LastCellNum;DataColumn dc=null;//获取列数for(int j=colIndex;j<colCount;j+++{dc=new DataColumn(firstRow.GetCell(j).StringCellValue);dt.Columns.Add(dc);}//跳过第一行列名rowIndex++;for(int k=rowIndex;k<=rowCount;k++){DataRow dr=dt.NewRow();row=sheet.GetRow(k);for(int l=colIndex;l<colCount;l++){if(row.GetCell(l)==null){ continue;}dr[l]=row.GetCell(l).StringCellValue; }dt.Rows.Add(dr);}ds.Tables.Add(dt);}sheet=null;workbook=null;fileStream.Close();fileStream.Dispose();}catch(Exception ex){throw;}return ds;}我这里用的是.xlsx格式的,也就是Excel2007及以上版本,2003版本的话方法类似,只是打开文件的操作类不一样//2007及以上版本XSSFWorkbook xWorkbook=new XSSFWorkbook(fileStream);//2003版本HSSFWorkbook hWorkbook=new HSSFWorkbook(fileStream);第四种:Aspose.Cells.dllpublic DataSet ImportExcel(string filePath){DataSet ds=null;try{Aspose.Cells.Workbook workbook=new Aspose.Cells.Workbook();//打开文件,参数可以使文件的路径,也可以直接传入一个文件流workbook.Open(filePath)//获取sheet表Aspose.Cells.Worksheets worksheets=workbook.Worksheets;Aspose.Cells.Worksheet worksheet=null;Aspose.Cells.Cells cell=null;ds=new DataSet();DataTable dt=null;int rowIndex=0;int colIndex=0;for(int i=0;i<worksheets.Count;i++){dt=new DataTable();dt.TableName="table"+i.ToString();worksheet=worksheets[i];//获取每个sheet表的所有单元格cells=worksheet.Cells;dt=cells.ExportDataTableAsString(rowIndex,colIndex,Cells.MaxDataRow+1,cells.MaxDataColumn+1,true);ds.Tables.Add(dt);}worksheets.Clear();worksheet=null;worksheets=null;workbokk=null;}catch(Exception ex){throw;}return ds;}这种方法操作比较方便,跟OleDB一样直接获取一个sheet表的数据,不用一个单元格一个单元格的获取。而且操作也比较灵活,你可以一行一行的获取数据,甚至一个单元格一个单元格的获取数据第五种:EPPluspublic DataSet ImportExcel(string filePath){DataSet ds=null;try{//打开文件FileStream fileStream=new FileStream(filePath,FileMode.Open);//读取文件流ExcelPackage package=new ExcelPackage(fileStream);//获取sheet表ExcelWorksheets worksheets=package.Workbook.Worksheets;ExcelWorksheet worksheet=null;ds=new DataSet();DataTable dt=null;for(int i=1;i<=worksheets.Count;i++){dt=new DataTable();dt.TableName="table"+i.ToString();worksheet=worksheets[i];//获取行数int rowCount=worksheet.Dimension.End.Row;//获取列数int colCount=worksheet.Dimension.End.Column;//起始行为1int rowIndex=worksheet.Dimenson.Start.Row;//起始列为1int colIndex=worksheet.Dimension.Start.Colimn;DataColumn dc=null;for(int j=colIndex;j<=colCount;j++){dc=new DataColumn(worksheet.Cells[rowIndex,j].Value.ToString());dt.Columns.Add(dc);}rowIndex++;for(int k=rowIndex;k<=rowCount;k++){DataRow dr=dt.NewRow();for(int l=colIndex;l<=colCount;l++){if(worksheet.GetValue(k,l)==null){continue;}dr[l-1]=worksheet.GetValue(k,l).ToString();}ds.Tables.Add(dt);}package.Dispose();worksheet=null;worksheets=null;package=null;fileStream.Close();fileStream.Dispose();}catch(Exception ex){throw;}return ds;}这种方法读取Excel数据性能还不错,但是要注意的是,sheet、row、col的起始值都是从1开始的