利用OleDb方式对DataSet 和 Excel 数据快速导入导出

一：DataSet 导入到Excel

 

        ///   <summary>
         ///  导出数据到Excel
         ///   </summary>
         ///   <param name="Path"> 需要导入的Excel地址 </param>
         ///   <param name="oldds"> 需要导入的数据 </param>
         ///   <param name="TableName"> 表名 </param>
         public   static   void  DSToExcel2003( string  Path, DataSet oldds,  string  TableName)
        {
             // Excel2003的连接字符串
             string  strCon  =   "  Provider = Microsoft.Jet.OLEDB.4.0 ; Data Source = "   +  Path  +   " ;Extended Properties=Excel 8.0 " ;
             // 执行导入
            ExcuteSQL(oldds, TableName, strCon);


        }

         ///   <summary>
         ///  导出数据到Excel
         ///   </summary>
         ///   <param name="Path"> 需要导入的Excel地址 </param>
         ///   <param name="oldds"> 需要导入的数据 </param>
         ///   <param name="TableName"> 表名 </param>
         public   static   void  DSToExcel2007( string  Path, DataSet oldds,  string  TableName)
        {
             // Excel2007的连接字符串  
             string  strConn  =   " Provider=Microsoft.ACE.OLEDB.12.0; "   +   " Data Source= "   +  Path  +   " ; "   +   " Extended Properties=\ " Excel  12.0  Xml;HDR = YES;\ "" ;
             // 执行导入
            ExcuteSQL(oldds, TableName, strConn);


        }
         ///   <summary>
         ///  执行
         ///   </summary>
         ///   <param name="oldds"> 需要导入的数据 </param>
         ///   <param name="TableName"> 表名 </param>
         ///   <param name="strCon"> 连接字符串 </param>
         private   static   void  ExcuteSQL(DataSet oldds,  string  TableName,  string  strCon)
        {
             // 连接
            OleDbConnection myConn  =   new  OleDbConnection(strCon);

             string  strCom  =   " select * from [ "   +  TableName  +   " $] " ;

             try
            {
                myConn.Open();
                OleDbDataAdapter myCommand  =   new  OleDbDataAdapter(strCom, myConn);

                System.Data.OleDb.OleDbCommandBuilder builder  =   new  OleDbCommandBuilder(myCommand);

                 // QuotePrefix和QuoteSuffix主要是对builder生成InsertComment命令时使用。   
                 // 获取insert语句中保留字符（起始位置）  
                builder.QuotePrefix  =   " [ " ;
                
                 // 获取insert语句中保留字符（结束位置）   
                builder.QuoteSuffix  =   " ] " ;
                
                DataSet newds  =   new  DataSet();
                 // 获得表结构
                DataTable ndt  =  oldds.Tables[ 0 ].Clone();
                 // 清空数据
                 // ndt.Rows.Clear();

                ndt.TableName  =  TableName;
                newds.Tables.Add(ndt);

                 // myCommand.Fill(newds, TableName);

                 for  ( int  i  =   0 ; i  <  oldds.Tables[ 0 ].Rows.Count; i ++ )
                {
                     // 在这里不能使用ImportRow方法将一行导入到news中，
                     // 因为ImportRow将保留原来DataRow的所有设置(DataRowState状态不变)。
                     // 在使用ImportRow后newds内有值，但不能更新到Excel中因为所有导入行的DataRowState!=Added     
                    DataRow nrow  =  newds.Tables[ 0 ].NewRow();
                     for  ( int  j  =   0 ; j  <  oldds.Tables[ 0 ].Columns.Count; j ++ )
                    {
                        nrow[j]  =  oldds.Tables[ 0 ].Rows[i][j];
                    }
                    newds.Tables[ 0 ].Rows.Add(nrow);
                }
                 // 插入数据
                myCommand.Update(newds, TableName);
            }
             finally
            {
                myConn.Close();
            }
        }

 

 

 

使用实例

 

         ///   <summary>
         ///  导出数据
         ///   </summary>
         ///   <param name="sender"></param>
         ///   <param name="e"></param>
         private   void  btnExport_Click( object  sender, EventArgs e)
        {

             // string connString = "server=localhost;uid=sa;pwd=123456;database=MYDB";
             string  excelModlePath  =   @" G:\Study\ExcelOper\Model\学籍表.xls " ;

             // 文件保存对话框
            System.Windows.Forms.SaveFileDialog fd  =   new  SaveFileDialog();

            fd.DefaultExt  =   " .xls " ;
   

             // string savefilepath = @"G:\Study\ExcelOper\SaveFolder\study.xls";

             if  (fd.ShowDialog()  ==  DialogResult.OK)
            {
                 using  (ExcelHelper excel  =   new  ExcelHelper())
                {
                    excel.Open(excelModlePath);
                     // 保存数据到用户指定的文件夹
                    excel.SaveFile(fd.FileName);
                }

                 string  connString  =   " server=localhost;uid=sa;pwd=123456;database=MYDB " ;


                DataSet ds  =  SqlHelper.ExecuteDataSet(connString, CommandType.Text,  " select * from study " );

                ds.Tables[ 0 ].TableName  =   " study " ;

                ExcelHelper.DSToExcel2003(fd.FileName, ds,  " study " );
            }
        }

 

二 Excel导出到DataSet

 

        ///   <summary>
         ///  查询Excle2007的数据
         ///   </summary>
         ///   <param name="Path"></param>
         ///   <returns></returns>
         public   static  DataSet Excel2007ToDS( string  Path,  string  SheetName)
        {
             // Excel2007链接字符串
             string  strConn  =   " Provider=Microsoft.ACE.OLEDB.12.0; "   +   " Data Source= "   +  Path  +   " ; "   +   " Extended Properties=\ " Excel  12.0  Xml;HDR = YES;\ "" ;
             return  ExcuteQuery(strConn, SheetName);
        }

         ///   <summary>
         ///  查询Excle2003的数据
         ///   </summary>
         ///   <param name="Path"></param>
         ///   <returns></returns>
         public   static  DataSet Excel2003ToDS( string  Path,  string  SheetName)
        {
             // Excel2003链接字符串
             string  strConn  =   " Provider=Microsoft.Jet.OLEDB.4.0; "   +   " Data Source= "   +  Path  +   " ; "   +   " Extended Properties=Excel 8.0; " ;

             return  ExcuteQuery(strConn, SheetName);
        }

         ///   <summary>
         ///  执行查询
         ///   </summary>
         ///   <param name="strConn"></param>
         ///   <returns></returns>
         private   static  DataSet ExcuteQuery( string  strConn,  string  SheetName)
        {
             // 默认sheet名
             if  ( string .IsNullOrEmpty(SheetName))
            {
                SheetName  =   " Sheet1 " ;
            }

             // 链接
            OleDbConnection conn  =   new  OleDbConnection(strConn);
            DataSet ds  =   null ;
             try
            {
                conn.Open();
                 string  strExcel  =   "" ;
                OleDbDataAdapter myCommand  =   null ;
                
                strExcel  =   " select * from [ "   +  SheetName  +   " $] " ;
                myCommand  =   new  OleDbDataAdapter(strExcel, strConn);
                ds  =   new  DataSet();
                 // 查询数据
                myCommand.Fill(ds, SheetName);
            }
             finally
            {
                conn.Close();
            }
             //

             return  ds;
        }

 

使用实例

         private   void  btnImport_Click( object  sender, EventArgs e)
        {
             // openFileDialog1.ShowDialog();

             // if (openFileDialog1.RestoreDirectory)
             // {

             // }


             string  connString  =   " server=localhost;uid=sa;pwd=123456;database=MYDB " ;
            System.Windows.Forms.OpenFileDialog fd  =   new  OpenFileDialog();
             if  (fd.ShowDialog()  ==  DialogResult.OK)
            {
                TransferData(fd.FileName,  " study " , connString);

                DataSet ds  =  SqlHelper.ExecuteDataSet(connString, CommandType.Text,  " select * from study " );

                dataGridView1.DataSource  =  ds.Tables[ 0 ];
            }

        }

 

 注意事项：

       一：DataSet导入到Excel时 导入的Excel的文件的Sheet名要和要导入的DataTable名一致，

Sheet的数据列名也要和DataTable列名一致放在Sheet的第一排

如下图:

二：Excel导出数据到DataSet的SheetName 需要和实际的Sheet名一致

 

总结：和直接使用office内核访问Excel数据的方式相比相信这种方式的读写速度上会占有很大优势

并且不用担心非托管资源的释放