Select datasource

Comments

• AlexTZ

  July 2009 edited 5:41PM

  Hello,
  
  do

  report.GetDataSource("your_ds").Enabled = true;
  

  after RegisterData call.
• danni Denmark

  July 2009 edited 5:41PM

  Thank you :-)
• jbg

  July 2009 edited July 2009

  Hello! I have a question too:
  
  
  Lets say i have a DataSet with a table "Mail" in it.
  Mail has columns : Mail.Number Mail.address Mail.PoBox
  
  First I design the report layout in Fastreport designer with the use of
  [Mail.Number] [Mail.address] [Mail.PoBox] to display data (i dont have a datasource set in the designer), and save it to a frx file.
  
  
  In the code i do :
  
  report1.Load("layout.frx");
  report1.RegisterData(data.Tables[0],"Mail");
  report1.GetDataSource("Mail").Enabled = true;
  report1.Show...
  
  
  And the report prints out empty with no data in it.
  Have i missed something in the designer ?
  
  It worked, when i used datasources in the designer with connection strings and queries, but that is not the way i need it to be. I need the Designer to read from a DataSet specified in the code.
  
  Any help?, Thanks
  
  EDIT:
  
  found a similar question here : http://www.fast-report.com/en/forum/?p=/discussion/5254
  
  But the solution :
  
  DataBand db1 = (DataBand)report.FindObject("Data1");
  db1.DataSource = report.GetDataSource("Mail");
  
  now throws a "Object reference not set to an instance of an object." error
• AlexTZ

  July 2009 edited 5:41PM

  Hello,
  
  The solution is correct. But in order to use it, you need to have a Data band named "Data1" in your report.
• jbg

  July 2009 edited 5:41PM

  Hmm. Thanks for the advice, forgot to take a look at the naming. But, there indeed is a databand named Data1 in the design.it seems that having it inside Group Header/Footer somehow throws an exception. If i move the databand outside of all groups, it works. But i need those groups. Any idea?
• AlexTZ

  July 2009 edited July 2009

  I checked it with groups, it works well.
  
  If you need to use an application dataset to design a report, you may:
  - Use technique described in the programmer's manual (Working with Windows.Forms/Using the Report component in Visual Studio). You need typed DataSet in this case.
  -or-
  - Call the report designer from your application to create a new report. This technique is used in Demo.exe - in fact, all demo reports are created in such way.
• jbg

  July 2009 edited 5:41PM

  Thanks for the quick answer.
  
  So its not possible to do it with the solution i found ? To replicate the problem : Using your demo \FastReport.Net Demo\Demos\C#\DataFromDataSet, the demo works as long as i dont insert a group around the databand "Data1" in the report.frx from the demo. It then throws a "Failed to compare two elements in the array." exception.
  
  I'll try to use Typed datasets only when i run out of options.
• AlexTZ

  July 2009 edited 5:41PM

  Sorry, I can't reproduce the error with DataFromDataSet, could you provide step-by-step instructions?
• jbg

  July 2009 edited 5:41PM

  Okay, ill try, im using FasReport v1.1.51.0:
  i :
  - open the DataFromDataSet project with VS2008, compile and run it. I click the "Run existing report" button, it works.
  - open the FastReport.Net Demo/Demo.exe and click " Run the designer" where i open the report.frx from the DataFromDataSet directory.
  - click on Configure bands , select Data:Employees, click on Add -> Group Header. Save.
  - now when clicking Run existing report again, it throws that error.
  
  
  Thanks for your time.
  
  
• AlexTZ

  July 2009 edited July 2009

  It's because you did not set the group condition for the group header band. Once you set it to say [Employees.ID] the report will be ok.
• jbg

  July 2009 edited 5:41PM

  Thank you very much, was a foolish mistake, works now.
  would be great to put
  
  DataBand db1 = (DataBand)report.FindObject("Data1");
  db1.DataSource = report.GetDataSource("Mail");
  
  
  In the documentation as an example, may save some time for a newb like me [img]style_emoticons/<#EMO_DIR#>/smile.gif" style="vertical-align:middle" emoid=":)" border="0" alt="smile.gif" /> Thanks again,[/img]