a data source instance has not been supplied for a data source error

Lyle Griess

0 down vote favorite

I'm currently trying to dynamically send an rdl report to my ReportViewer .net object.
I keep getting the error when I do it: A data source instance has not been supplied for the data source "blah"
I'm trying to define "blah" in my code behind at runtime.

ReportViewer1.ProcessingMode = Microsoft.Reporting.WebForms.ProcessingMode.Local;
  ReportViewer1.LocalReport.ReportPath = ReportFile;
  ReportViewer1.LocalReport.DataSources.Clear();
  Microsoft.Reporting.WebForms.ReportDataSource rds = new Microsoft.Reporting.WebForms.ReportDataSource();
  rds.Name = "blah";
  ReportViewer1.LocalReport.DataSources.Add(rds);
  ReportViewer1.DocumentMapCollapsed = true;
  ReportViewer1.LocalReport.Refresh();

this is not working by a long shot. I'm not sure what I'm supposed to do. here is an extract of the top of my rdl file:

   Name="blah">
      c6a8409e-71a4-4e96-86ad-b300a5b942c3
      
        SQL
        Data Source=10.555.121.121;Initial Catalog=blah
        true

All I'm trying to do is simply select * from a table in "blah" in my report. I need this to work because I have many other report instances I need to show inside my ReportViewer. Why doesn't Microsoft make this easier?
Thanks in advance anybody...

5 Replies

Know the answer? Post it — somebody with the same question will find it here.

Sam Hobbs16y ago
Good. That's the way it is supposed to work; you do the parts you can do.
Lyle Griess16y ago
Well for this forum to be of any use at all for anybody who wants to find answers to difficult questions, I would suggest instead of rambling on and fighting with people asking these questions you might consider answering some of them instead of providing useless suggestions. Also, if you don't know the answer to a question don't just chime in with stuff like "you want us to do all your work" blah blah blah. BTW. I did solve my problem, without your help.
Sam Hobbs16y ago
Based on your responses in your other thread, you obviously want to get someone else to do all your work.

I have worked with reports such as that. I use the interactive interface though; I don't edit the XML directly. You should try using the interactive interface in Visual Studio; it is probably called the designer.

I admit that I don't know anything about your data source. That's the problem; you only show the part that is not working. So instead of spending a lot of time asking for clarification I told you what I would do.
Lyle Griess16y ago
do you know what your talking about?
Sam Hobbs16y ago
Something I might do is to create a separate test project and then copy the report into it then try to generate the report. I would use the interactive tools to put the report in a report control and show it. When I was successful, I would look at the code generated by the IDE as a sample of what to use in my program.