c# - Report Viewer export to pdf getting error -

i getting error "cannot create data reader dataset 'dataset1'."

i expend lots of time solving issue unable resolved.same code working report generation @ time of pdf generation stuck.

here code please reply.

 protected void btnpdf_click(object sender, eventargs e)         {             string pdf = "pdf";             string reporttype = "reporttype";             warning[] warnings = null;             string[] streamids = null;             string mimetype = string.empty;             string encoding = string.empty;             string extension = string.empty;             string filetype = string.empty;              long _landids = 0;             if (_farmid > 0)             {                 land land = landmanager.getlandbyfarmid(_farmid);                 _landids = land.landid;             }               reportviewer_myreportid.sizetoreportcontent = true;             reportviewer_myreportid.localreport.reportpath = "reports/report/report.rdlc";             reportviewer_myreportid.processingmode = processingmode.remote;              objectdatasource_id.selectparameters.clear();             objectdatasource_id.selectparameters.add(querystringenum.companyid, currentcompanyid.tostring());             objectdatasource_id.selectparameters.add(querystringenum.landid, _landids.tostring());             var days = "-" + rdduration.selectedvalue;             objectdatasource_id.selectparameters.add(querystringenum.days, days.tostring());              reportviewer_myreportid.localreport.refresh();              byte[] bytes = reportviewer_myreportid.localreport.render("pdf", null,              out mimetype, out encoding, out extension, out streamids, out warnings);             filestream fs = new filestream(server.mappath("~/generatedfiles/" + reporttype + "." + "pdf"), filemode.openorcreate);              fs.write(bytes, 0, bytes.length);             fs.close();          } 

it work you.make sure dataset name not different.

code reference.

protected void btnpdf_click(object sender, eventargs e)     {         reportviewer viwer = new reportviewer();         objectdatasource ob = new objectdatasource("dataset.yourtableadapter", "getdata");         dataset.yourtableadapter ds = new dataset.yourtableadapter();          string pdf = "pdf";         string reporttype = "reporttype";         warning[] warnings = null;         string[] streamids = null;         string mimetype = string.empty;         string encoding = string.empty;         string extension = string.empty;         string filetype = string.empty;          long _landids = 0;         if (_farmid > 0)         {             land land = landmanager.getlandbyfarmid(_farmid);             _landids = land.landid;         }          viwer.sizetoreportcontent = true;         viwer.localreport.reportpath = "reports/report/report.rdlc";         viwer.processingmode = processingmode.local;         ob.selectparameters.clear();         ob.selectparameters.add(querystringenum.companyid, currentcompanyid.tostring());         ob.selectparameters.add(querystringenum.landid, _landids.tostring());         var days = "-" + rdduration.selectedvalue;         ob.selectparameters.add(querystringenum.days, days.tostring());          reportdatasource rds = new reportdatasource("datasetname", (object) ds.getdata((long?)currentcompanyid.toint64(), (int?)days.toint(), (long?)_landids.toint64()));          viwer.localreport.datasources.add(rds);         viwer.localreport.refresh();          byte[] bytes = viwer.localreport.render("pdf", null,          out mimetype, out encoding, out extension, out streamids, out warnings);         filestream fs = new filestream(server.mappath("~/generatedfiles/" + reporttype + "." + "pdf"), filemode.openorcreate);          fs.write(bytes, 0, bytes.length);         fs.close();        }