我在reportviewer.aspx中有一个报告查看器。生成报告后，选择Excel格式，然后单击“导出”。我发现在后端，当我按导出按钮时，它将再次加载数据，这会使导出花费20分钟或更长时间。我怀疑导出是否只是转储已经生成的报告内容，还是会加载函数并再次进行计算。如何避免导出再次进行计算，而只是转储已生成的报告？
这是我在reportviewer.aspx后面的代码。
public partial class ReportViewer : CustomPage
{
private string _reportSourceFolder = ConfigurationManager.AppSettings["ReportSourceFolder"];
protected void Page_Load(object sender, EventArgs e)
{
try
{
EW_REPORTS, true); // added by HC on 2014-10-21, for permission checking
string reportFileName = Request.QueryString["ReportFileName"];
if (string.IsNullOrEmpty(reportFileName))
{
}
else
{
int? yearInt = null;
string year = Request.QueryString["Year"];
if (string.IsNullOrEmpty(year))
{
yearInt = DateTime.Now.Year;
}
else
{
try
{
yearInt = Convert.ToInt32(year);
}
catch { }
}
string reportFullPath = Path.Combine(_reportSourceFolder, reportFileName);
Telerik.Reporting.UriReportSource uriReportSource = new Telerik.Reporting.UriReportSource();
uriReportSource.Parameters.Add(new Telerik.Reporting.Parameter("lang", WebUtil.GetLanguage()));
uriReportSource.Parameters.Add(new Telerik.Reporting.Parameter("companyID", WebUtil.GetCompanyID()));
if (yearInt != null)
{
uriReportSource.Parameters.Add(new Telerik.Reporting.Parameter("year", yearInt));
}
if (
!"AuditReport.trdx".Equals(reportFileName, StringComparison.OrdinalIgnoreCase)
//"Report1.trdx".Equals(reportFileName, StringComparison.OrdinalIgnoreCase)
//|| "ESGSummaryReport.trdx".Equals(reportFileName, StringComparison.OrdinalIgnoreCase)
)
{
int? fromYear = Common.Util.TryToConvertToInt32(Request.QueryString["fromYear"]);
int? fromMonth = Common.Util.TryToConvertToInt32(Request.QueryString["fromMonth"]);
int? toYear = Common.Util.TryToConvertToInt32(Request.QueryString["toYear"]);
int? toMonth = Common.Util.TryToConvertToInt32(Request.QueryString["toMonth"]);
string indicatorIDs = Request.QueryString["indicatorIDs"];
string locationIDs = Request.QueryString["locationIDs"];
if (fromYear == null || fromMonth == null || toYear== null || toMonth == null)
{
try
{
DateTime? fiscalYearStartDate = Util.GetCorporateFiscalYearStartDate();
if (fiscalYearStartDate != null)
{
DateTime now = DateTime.Now;
DateTime startDate = new DateTime(now.Year, fiscalYearStartDate.Value.Month, 1);
if (now < startDate)
{
startDate = startDate.AddYears(-1);
}
DateTime endDate = startDate.AddYears(1).AddMilliseconds(-1d);
if (fromYear == null)
{
fromYear = startDate.Year;
}
if (fromMonth == null)
{
fromMonth = startDate.Month;
}
if (toYear == null)
{
toYear = endDate.Year;
}
if (toMonth == null)
{
toMonth = endDate.Month;
}
}
}
catch { }
}
// prevent incorrect numbers
List<int> indicatorIDsList = new List<int>(1024);
string[] indicatorIDsArr = new string[] { };
if (indicatorIDs != null)
{
indicatorIDsArr = indicatorIDs.Split(",".ToCharArray(), StringSplitOptions.RemoveEmptyEntries);
}
foreach(string indicatorID in indicatorIDsArr)
{
int? temp = Common.Util.TryToConvertToInt32(indicatorID);
if (temp != null && !indicatorIDsList.Contains(temp.Value))
{
indicatorIDsList.Add(temp.Value);
}
}
if (indicatorIDsList.Count > 0)
{
indicatorIDs = string.Join(",", indicatorIDsList);
}
else
{
indicatorIDs = "0";
}
List<int> locationIDsList = new List<int>(1024);
string[] locationIDsArr = new string[] { };
if (locationIDs != null)
{
locationIDsArr = locationIDs.Split(",".ToCharArray(), StringSplitOptions.RemoveEmptyEntries);
}
foreach (string locationID in locationIDsArr)
{
int? temp = Common.Util.TryToConvertToInt32(locationID);
if (temp != null && !locationIDsList.Contains(temp.Value))
{
locationIDsList.Add(temp.Value);
}
}
if (locationIDsList.Count > 0)
{
locationIDs = string.Join(",", locationIDsList);
}
else
{
locationIDs = "0";
}
uriReportSource.Parameters.Add(new Telerik.Reporting.Parameter("fromYear", fromYear));
uriReportSource.Parameters.Add(new Telerik.Reporting.Parameter("toYear", toYear));
uriReportSource.Parameters.Add(new Telerik.Reporting.Parameter("fromMonth", fromMonth));
uriReportSource.Parameters.Add(new Telerik.Reporting.Parameter("toMonth", toMonth));
//uriReportSource.Parameters.Add(new Telerik.Reporting.Parameter("indicatorIDs", indicatorIDs));
uriReportSource.Parameters.Add(new Telerik.Reporting.Parameter("locationIDs", locationIDs));
}
if ("AuditReport.trdx".Equals(reportFileName, StringComparison.OrdinalIgnoreCase))
{
uriReportSource.Parameters.Add(new Telerik.Reporting.Parameter("performedDateFrom", DateTime.Now.AddDays(-1d)));
uriReportSource.Parameters.Add(new Telerik.Reporting.Parameter("performedDateTo", DateTime.Now));
}
uriReportSource.Uri = reportFullPath;
if (IsPrintPreviewMode())
{
uiReportViewer.ViewMode = Telerik.ReportViewer.WebForms.ViewMode.PrintPreview;
}
uiReportViewer.ReportSource = uriReportSource;
} // end if
}
catch (Exception ex)
{
uiPanel.Alert(Convert.ToString(HttpContext.GetGlobalResourceObject("Resource", "Message_Error_Occurs")));
Logger.Log(string.Format("Error occurs in the '{0}.{1}' method.{2}{3}"
, System.Reflection.MethodBase.GetCurrentMethod().DeclaringType.ToString()
, System.Reflection.MethodBase.GetCurrentMethod().Name
, Environment.NewLine
, ex.ToString()));
}
} // end method
private bool IsPrintPreviewMode()
{
bool val = false;
string temp = Request.QueryString["IsPrintPreviewMode"];
if (!string.IsNullOrEmpty(temp))
{
try
{
val = Convert.ToBoolean(temp);
}
catch { }
}
return val;
}
protected void uiBack_Click(object sender, EventArgs e)
{
string reportFileName = Request.QueryString["ReportFileName"];
Response.Redirect(string.Format("~/ReportCriteria.aspx?ReportFileName={0}", reportFileName), false);
Context.ApplicationInstance.CompleteRequest();
}
}