把WebForm数据导出到Excel中

        上午给系统的订单管理部分添加了一个功能,把查询到的订单信息导出到Excel,供管理员分析用。以前写的代码如下:

Response.Clear();
Response.BufferOutput 
=   true ;
Response.Charset 
=   " GB2312 " ;
Response.AppendHeader(
" Content-Disposition " , " attachment;filename = FileName.xls " ); 
Response.ContentEncoding 
=  Encoding.GetEncoding( " GB2312 " );
Response.ContentType 
=   " application/ms-excel " ;
this .EnableViewState  =   false ;
System.Globalization.CultureInfo myinfo 
=   new  System.Globalization.CultureInfo( " ZH-CN " true );
StringWriter osw 
=   new  StringWriter(myinfo);
HtmlTextWriter ohtw 
=   new  HtmlTextWriter(osw);
dgQueryResult.RenderControl(ohtw);
Response.Write(osw);
Response.End();
  
        我的查询用了分页,客户要求把所有查询到的数据都导出到Excel,所以不能象以前那样通过把控件的内容导出到Excel来实现此功能,于是把代码改成这样:
  
Response.Clear();
Response.BufferOutput 
=   true ;
Response.Charset 
=   " GB2312 " ;
Response.AppendHeader(
" Content-Disposition " , " attachment;filename = 订单.xls " ); 
Response.ContentEncoding 
=  System.Text.Encoding.GetEncoding( " GB2312 " );
Response.ContentType 
=   " application/ms-excel " ;
string  strExcelHeader  =   string .Empty;
string  strExcelItems; 
if (ViewState[ " SQL " !=   null )    // 取前面查询用的SQL语句
{
    
//  取得各列标题,各标题之间以\t分割,最后一个列标题后加回车符  
     strExcelHeader  =   " 订单号\t经销商\t地区\t小类\t商品\t实付金额\t下单时间\t有效状态\t处理状态\t\n " ;                                      
    //  向HTTP输出流中写入取得的数据信息  
   
Response.Write(strExcelHeader);    
          
    //  逐行处理查询结果数据  
    ITDBHandle itDbHandle  =   new  ITDBHandle();
    itDbHandle.QueryString 
=  ViewState[ " SQL " ].ToString();
    SqlDataReader reader 
=  itDbHandle.ExecuteDataReader();       
    while (reader.Read())  
    {  
        strExcelItems 
=   string .Empty;
        strExcelItems 
+=  reader[ " OrderID " ].ToString()  +   " \t " ;    
        strExcelItems 
+=  reader[ " DealerName " ].ToString()  +   " \t " ;
        strExcelItems 
+=  reader[ " City " ].ToString()  +   " \t " ;
        strExcelItems 
+=  reader[ " SmallClassName " ].ToString()  +   " \t " ;
        strExcelItems 
+=  reader[ " BrandName " ].ToString()  +  reader[ " Model " ].ToString()  +   " \t " ;
        strExcelItems 
+=  reader[ " TotalPrice " ].ToString()  +   " \t " ;
        strExcelItems 
+=  reader[ " OrderDate " ].ToString()  +   " \t " ;
        strExcelItems 
+=  reader[ "Is Valid " ].ToString()  +   " \t " ;
        strExcelItems 
+=  reader[ " DealState " ].ToString()   + " \n " ;                                                   
        Response.Write(strExcelItems);  
   }  
    reader.Close();
    Response.End();
}
    
       我这里只是简单的把查询到的数据以Excel的形式Write出来(当然也可以是其他格式,比如XML),对简单的需求足矣了,当然,用.NET直接去操作Excel文件也是很简单的,有很多这样的例子可以参考。
   

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