c# 将Datatable数据导出到Excel表格中

话不多说，请看代码：

public FileResult GetExcelFile()
    {
      if (Session["beginDate"] != null)
      {
 string bdate = Session["beginDate"].ToString();
 DateTime ld = Convert.ToDateTime(Session["lastDate"].ToString());
 DateTime ldate = ld.AddDays(1);
 string lldate = ldate.ToString("yyyy-MM-dd");
 int ptkey = Convert.ToInt32(Session["Process_PTR"]);
 string proceSql = "select * from Assay_Process where RKEY="+ptkey;
 DataTable proceDt = SqlHelper.QueryTable(proceSql);
 IDataParameter[] iDataTitle = new SqlParameter[3];
 iDataTitle[0] = new SqlParameter("@BeginDate", bdate);
 iDataTitle[1] = new SqlParameter("@LastDate", lldate);
 iDataTitle[2] = new SqlParameter("@RKEY", ptkey);
 DataSet dtTitle = SqlHelper.RunProceduresByParameter("pro_GetAssalyInfoByExportPrint", iDataTitle);
 DataTable dt = dtTitle.Tables[0];
 string outStr = ExcelExport.outExcel(dt);
 byte[] fileContents = Encoding.UTF8.GetBytes(outStr.ToString());
 return File(fileContents, "application/ms-excel", "" + proceDt.Rows[0]["ProcessName"].ToString().Trim() + "化验单据(" + bdate.Trim() + "-" + lldate.Trim() + ").xls"); 
      }
      else
      {
 string qua_no = Session["quano"].ToString();
 IDataParameter[] iDataTitle = new SqlParameter[1];
 iDataTitle[0] = new SqlParameter("@Qua_no", qua_no);
 DataSet dtTitle = SqlHelper.RunProceduresByParameter("pro_GetAssalyInfoByQua_No", iDataTitle);
 DataTable dt = dtTitle.Tables[0];
 string outStr = ExcelExport.outExcel(dt);
 byte[] fileContents = Encoding.UTF8.GetBytes(outStr.ToString());
 return File(fileContents, "application/ms-excel", "化验单据(" + qua_no.Trim()+ ").xls"); 
      }
    }

以上就是本文的全部内容，希望本文的内容对大家的学习或者工作能带来一定的帮助，同时也希望多多支持考高分网！