Excel 操作

在进行.net开发的时候,经常遇到对Excel进行操作,在此记录一些自己用过的操作! 所有的操作都是基于微软的Excel类库. 还有Aspose.Cells,这个对Excel的操作是非常强大的,不过是收费的,但是贵国的盗版太强大了~~~~懂撒!

• 一 把DataTable写入Excel
  Code
  /**//// <summary>
          /// 把dataTable写入到excel,从指定行,指定列开始写
          /// </summary>
          /// <param name="dataTable">写入的数据源</param>
          /// <param name="filePath">文件路径</param>
          /// <param name="row">指定行</param>
          /// <param name="col">指定列</param>
          /// <param name="sheet">指定sheet</param>           
  public void WriteDataToExcelCommon(System.Data.DataTable dataTable, string filePath, int row, int col, string sheet)
            {
              Application application = new Application();
              application.Application.Workbooks.Add(true);
              object missing = Type.Missing;
              Workbook workbook = application.Workbooks.Open(filePath, missing, missing, missing, missing, missing,
                                                                   missing, missing, missing, missing, missing, missing,
                                                                   missing, missing,
                                                                   missing);
              application.Visible = false;
  
              //获得指定sheet
              Worksheet worksheet = application.Sheets[sheet] as Worksheet;
  
              int columnCount = dataTable.Columns.Count;
              int rowCount = dataTable.Rows.Count;
              int tempRow = row;
              for (int i = 0; i <= columnCount - 1; i++)
              {
                  for (int j = 0; j < rowCount; j++)
                  {
                      worksheet.Cells[row, col] = dataTable.Rows[j][i];
                      row++;
                  }
                  row = tempRow;
                  col++;
              }
              workbook.Save();
              workbook.Close(missing, missing, missing);
              application.Quit();
          }
•  二 把Excel中的数据写入DataTable
  Code
          /**//// <summary>
         /// 读取Excel文档中的数据
          /// </summary>
          /// <param name="file">文件名</param>
          /// <returns>填充后的DataTable</returns>
          public static DataTable GetExcelData(string file,string excelName)
          {
              DataTable mydt = new DataTable();
  
              string connectionString = "Provider = Microsoft.Jet.OLEDB.4.0 ; Data Source = '" + file + "';Extended Properties='Excel 8.0;HDR=Yes;IMEX=1;'";
              string selectCommand = "select * from [" + excelName + "]";
  
  
              using (OleDbConnection connection = new OleDbConnection(connectionString))
              {
                  try
                  {
                      OleDbDataAdapter adapter = new OleDbDataAdapter(selectCommand, connection);
                      adapter.Fill(mydt);
                  }
                  catch (Exception ex)
                  {
                      throw ex;
                  }
              }
              return mydt;
          }