Can't switch DataTable(DataSet)

Comments

• ipong

  May 2018 edited 8:25AM

  show the code to reflect your problem
• Tossi65

  May 2018 edited 8:25AM

  ipong wrote: »

  show the code to reflect your problem

   if (report1.Dictionary.ChildObjects.Count > 0)
              {
                  DataTable dt = null;
                  FastReport.Data.DataConnectionBase con = report1.Dictionary.ChildObjects[0] as FastReport.Data.DataConnectionBase;
                  if (con.Tables.Count > 0)
                  {
                      string name = con.Tables[0].Alias;
                      string sql = con.Tables[0].SelectCommand;
                      string constr = con.ConnectionString;
                      using (System.Data.SqlClient.SqlConnection conn = new System.Data.SqlClient.SqlConnection(constr))
                      {
                          if (conn != null)
                          {
                              if (conn.State != ConnectionState.Open) conn.Open();
  
                              using (System.Data.SqlClient.SqlCommand cmd = new System.Data.SqlClient.SqlCommand(sql, conn))
                              {
                                  dt = new DataTable(name);
                                  dt.Load(cmd.ExecuteReader());
                              }
                          }
                      }
                      if (dt != null)
                      {
                          report1.RegisterData(dt, name); <= this is ok
                          try
                          {
                              //report1.Show();
                              if (report1.Prepare()) report1.ShowPrepared(true, this); <= But here crashes!!!!!
                              if (chkPDF.Checked)
                              {
                                  // create an instance of HTML export filter
                                  FastReport.Export.Pdf.PDFExport export = new FastReport.Export.Pdf.PDFExport();
                                  //export.
                                  // show the export options dialog and do the export
                                  //if (export.ShowDialog())
                                  string file = System.IO.Path.ChangeExtension(report1.FileName, ".PDF");
                                  report1.Export(export, file);
                              }
                          }
                          catch (Exception ex)
                          {
                              if (ex.InnerException != null)
                              {
                                  ShowRTFMeldung(ex.InnerException.Source, true);
                                  ShowRTFMeldung(ex.InnerException.Message, true);
                              }
                              ShowRTFMeldung(ex.Message, true);
                              ShowRTFMeldung(ex.StackTrace, true);
                          }
                      }
                  }
              }
  
          }
  

  
  thx
  
  
• ipong

  May 2018 edited May 2018

  i have the same problem, reregistering data doesnt work, therefore, do not use the same instance, dispose the old and create new report.
  
  take a look at http://www.fast-report.com/en/forum/?p=/discussion/14767
  load report => register data => modify report resource string => prepare => failed
• Tossi65

  May 2018 edited 8:25AM

  ipong wrote: »

  i have the same problem, reregistering data doesnt work, therefore, do not use the same instance, dispose the old and create new report.
  
  take a look at http://www.fast-report.com/en/forum/?p=/discussion/14767
  load report => register data => modify report resource string => prepare => failed

  
  What I do not understand, with a real database connection, e.g. MsSQL or something, you can switch the DataSet.
  Only with the CSV connection it does not work
• ipong

  May 2018 edited 8:25AM

  as long as the same report template, using one report instance should be no problem.
  
  look this code below, first run : data came from embedded connection in frx file and on button1_Click : push datatable to the report, it works well
  

  public partial class Form1 : Form
  {
      FastReport.Report report = new FastReport.Report();
  
      public Form1()
      {
          InitializeComponent();            
      }
  
      private void Form1_Shown(object sender, EventArgs e)
      {
          // csv file location => d:\Row Datasource.csv
          report.Preview = previewControl1;
          report.Load(@"d:\Untitled.frx");
          report.Prepare();
          report.ShowPrepared();
      }
  
      private void button1_Click(object sender, EventArgs e)
      {
          FastReport.Data.CsvDataConnection csv = new FastReport.Data.CsvDataConnection();
          csv.Codepage = 1252;
          csv.Separator = ",";
          csv.CsvFile = @"D:\_DOWNLOAD\Row Datasource.csv";
          csv.FieldNamesInFirstString = true;
          csv.RemoveQuotationMarks = true;
          csv.ConvertFieldTypes = true;
  
          csv.CreateAllTables();
          DataTable table = csv.Tables[0].Table;
  
          report.RegisterData(table, "Row Datasource");
          report.Prepare();
          report.ShowPrepared();
      }
  }