操作EXCEL数据

string filePath = @"F:\Tim\UpdatePIMData1\Staff.xls";    private DataSet SearchDataSource()    {        string strCon;        strCon = "Provider=Microsoft.Jet.Oledb.4.0;Data Source=" + filePath + ";Extended Properties='Excel 8.0;HDR=Yes;IMEX=1;'";        OleDbConnection olecon = new OleDbConnection(strCon);        OleDbDataAdapter myda = new OleDbDataAdapter("SELECT StaffID,JoinDate FROM [Staff$]", olecon);        DataSet myds = new DataSet();        myda.Fill(myds);        return myds;    }

　　

/// <summary>  /// 写入Excel文档  /// </summary>  /// <param name="Path">文件名称</param>  public bool SaveFP2toExcel(string Path)  {   try   {    string strConn = "Provider=Microsoft.Jet.OLEDB.4.0;" +"Data Source="+ Path +";"+"Extended Properties=Excel 8.0;";    OleDbConnection conn = new OleDbConnection(strConn);    conn.Open();      System.Data.OleDb.OleDbCommand cmd=new OleDbCommand ();    cmd.Connection =conn;    //cmd.CommandText ="UPDATE [sheet1$] SET 姓名='2005-01-01' WHERE 工号='日期'";    //cmd.ExecuteNonQuery ();    for(int i=0;i<fp2.Sheets [0].RowCount -1;i++)    {     if(fp2.Sheets [0].Cells[i,0].Text!="")     {      cmd.CommandText ="INSERT INTO [sheet1$] (工号,姓名,部门,职务,日期,时间) VALUES('"+fp2.Sheets [0].Cells[i,0].Text+ "','"+       fp2.Sheets [0].Cells[i,1].Text+"','"+fp2.Sheets [0].Cells[i,2].Text+"','"+fp2.Sheets [0].Cells[i,3].Text+       "','"+fp2.Sheets [0].Cells[i,4].Text+"','"+fp2.Sheets [0].Cells[i,5].Text+"')";      cmd.ExecuteNonQuery ();     }    }    conn.Close ();    return true;   }   catch(System.Data.OleDb.OleDbException ex)   {    System.Diagnostics.Debug.WriteLine ("写入Excel发生错误："+ex.Message );   }   return false;  }

　　

protected void DoOleSql(string sql, string database)    {                OleDbConnection conn = new OleDbConnection();        conn.ConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source="        + Server.MapPath("\\") + database        + "; Extended Properties='Excel 8.0;HDR=no;IMEX=0'";        try        {//打开连接            conn.Open();        }        catch (Exception e)        {            Response.Write(e.ToString());        }        OleDbCommand  olecommand = new OleDbCommand(sql, conn);                try        {//执行语句            olecommand.ExecuteNonQuery();        }        catch (Exception eee)        {            Response.Write(eee.ToString());            conn.Close();        }        finally        {            conn.Close();//关闭数据库        }        conn.Close();}

3、从excel文件读取数据

string sql = "select * from [sheet1$]";

DoOleSql(sql,"test.xls");

4、更新excel文件中的数据

 

string sql = "update [sheet1$] set FieldName1='333' where FieldName2='b3'";

DoOleSql(sql,"test.xls");

 

5、向excel文件插入数据

string sql = "insert into [sheet1$](FieldName1,FieldName2,…) values('a',’b’,…)";

DoOleSql(sql,"test.xls");

6、删除excel文件中的数据：不提倡使用这种方法

7、对于非标准结构的excel表格，可以指定excel中sheet的范围

1）读取数据：string sql = "select * from [sheet1$A3:F20]";

2）更新数据：string sql = "update [sheet1$A9:F15] set FieldName='333' where AnotherFieldName='b3'";

3）插入数据：string sql = "insert into [sheet1$A9:F15](FieldName1,FieldName2,…) values('a',’b’,…)";

4）删除数据：不提倡

注：1）代码根据需要可以自行修改；2）如果出现“操作必须使用一个可更新的查询”错误，可能sql语句中对excel文件中的“字段”引用有错误，或对excel文件不具有“修改”权限；3）如果出现“不能扩充选定范围”错误，可能是对excel文件引用的“范围”有错误。

public static bool SaveDataTableToExcel(System.Data.DataTable excelTable, string filePath)          {              Microsoft.Office.Interop.Excel.Application app =                  new Microsoft.Office.Interop.Excel.ApplicationClass();              try              {                  app.Visible = false;                  Workbook wBook = app.Workbooks.Add(true);                  Worksheet wSheet = wBook.Worksheets[1] as Worksheet;                  if (excelTable.Rows.Count > 0)                  {                      int row = 0;                      row = excelTable.Rows.Count;                      int col = excelTable.Columns.Count;                      for (int i = 0; i < row; i++)                      {                          for (int j = 0; j < col; j++)                          {                              string str = excelTable.Rows[i][j].ToString();                              wSheet.Cells[i + 2, j + 1] = str;                          }                      }                  }                    int size = excelTable.Columns.Count;                  for (int i = 0; i < size; i++)                  {                      wSheet.Cells[1, 1 + i] = excelTable.Columns[i].ColumnName;                  }                  //设置禁止弹出保存和覆盖的询问提示框                   app.DisplayAlerts = false;                  app.AlertBeforeOverwriting = false;                  //保存工作簿                   wBook.Save();                  //保存excel文件                   app.Save(filePath);                  app.SaveWorkspace(filePath);                  app.Quit();                  app = null;                  return true;              }              catch (Exception err)              {                  MessageBox.Show("导出Excel出错！错误原因：" + err.Message, "提示信息",                      MessageBoxButtons.OK, MessageBoxIcon.Information);                  return false;              }              finally              {              }          }  

　　

来源：https://www.cnblogs.com/jack-liang/archive/2011/08/04/2127338.html