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Populating a DataTable from a BindingSource

Mr_Fulano
Mr_Fulano asked
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Last Modified: 2012-08-14
Hi, I'm using VB 2005, WinForms. I have several DataGridViews in my application and I populated them with a BindingSource. That all works well.

I now need to create some reports using ReportViewer, but ReportViewer gets its feed from a DataSet, which in turn contains a DataTable.

What I'd like to do is use my BindingSouce to populate my Report's DataTable.

Something like this (although I know this won't work)...

DataTable1.DataSource = bs   << I know this is not correct, but its what I'd like to do.

Is there a way to do this, or do I need to simply poplate a new DataTable from a DataAdapter, CommandBuilder...etc? (I'd really dislike redoing all that)

Thanks for the help and advice,
Fulano
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Commented:
Hi! Do it something like this.

DataTable dataTable = bs.DataSource as DataTable;

Commented:
fyi...I did not run through this to see if there would be any issues or if it would even work...

Commented:
Sorry didn't seen the other comment.
Top Expert 2007

Commented:
Well, one thing to keep in mind is that when you create a DataSet and fill it from the DataBase, then the loaded DataSet exists in memory:

    DataSet in memory.

When you create a BindingSource, and set it's DataSource to the DataSet that you have already created and loaded, and is in memory, Then the BindingSource is simply pointing to the existing DataSet that is in memory; it's not creating and using a copy of it.  

    DataSet in memory <- BindingSource


So, you can actually use the DataSet itself as the DataSource for the Report.

Author

Commented:
Hi VBRocks, you bring up a good point. That's one of the reasons I wanted to use my BS rather than fill another DataSet just for the report. I actually create my DataSets and DataTables programmatically. I don't use the Wizard. However, for use with ReportViewer its easier to create a "dummy" DataSet and then add DataTables to it, to then be used with in Report. I needed a way to populate my DataTable with the most recent information available, which in y case is the BS.

Thanks for the comment,
Fulano

Author

Commented:
Very good suggestion. This works well.
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