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  
            {  
            }  
        }