报告查看器导出为pdf获取错误

Question

我收到此错误“无法为数据集'DataSet1'创建数据读取器”。

我花了很多时间来解决这个问题，但无法解决 。我们的代码对于生成报告非常有用，但是在生成pdf时它仍然存在。

这是我的代码，请回复。

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(); 

     } 

Answer 1

它会为你工作。确保数据集名称没有不同。

代码供您参考。

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(); 



    }