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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:
Re***nse.Clear();
Re***nse.BufferOutput = true;
Re***nse.Charset = "GB2312";
Re***nse.AppendHeader("Content-Disposition","attachment;filename = Fi***ame.xls");
Re***nse.ContentEncoding = En***ing.GetEncoding("GB2312");
Re***nse.ContentType = "application/ms-excel";
th***EnableViewState = false;
Sy***m.Globalization.CultureInfo myinfo = new Sy***m.Globalization.CultureInfo("ZH-CN", true);
StringWriter osw = new StringWriter(myinfo);
HtmlTextWriter ohtw = new HtmlTextWriter(osw);
dg***ryResult.RenderControl(ohtw);
Re***nse.Write(osw);
Re***nse.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:
Re***nse.Clear();
Re***nse.BufferOutput = true;
Re***nse.Charset = "GB2312";
Re***nse.AppendHeader("Content-Disposition","attachment;filename = 订单.xls");
Re***nse.ContentEncoding = System.Text.En***ing.GetEncoding("GB2312");
Re***nse.ContentType = "application/ms-excel";
string strExcelHeader = st***g.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tn";
// 向HTTP输出流中写入取得的数据信息
Re***nse.Write(strExcelHeader);
// 逐行处理查询结果数据
ITDBHandle itDbHandle = new ITDBHandle();
it***andle.QueryString = ViewState["SQL"].ToString();
SqlDataReader reader = it***andle.ExecuteDataReader();
while(re***r.Read())
{
strExcelItems = st***g.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["IsValid"].ToString() + "t";
strExcelItems += reader["DealState"].ToString() +"n";
Re***nse.Write(strExcelItems);
}
re***r.Close();
Re***nse.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。