Getting Object Instance for e.RowIndex

[Administrator]

I am using a collection of business entity objects as data source for my GDBG. Everything is working my.

In QueryCellInfo event I need to get the associated business object for e.RowIndex. How do I get it?

If I use the following code I always get the object for the current selected row.

CurrencyManager cm = this.gdbgMyGrid.BindingContext[gdbgMyGrid.DataSource, gdbgMyGrid.DataMember] as CurrencyManager;

MyObject myObject = (MyObject)cm.Current;

Please do help me.
VS

[Administrator]

Try:

CurrencyManager cm = this.gdbgMyGrid.BindingContext[gdbgMyGrid.DataSource, gdbgMyGrid.DataMember] as CurrencyManager;

MyObject myObject = (MyObject)cm.List[e.RowIndex - 1];



            

[Sebastien Thuilliez]

Clay,

is there any way to retrieve the object like you did above, for the displayed rows ... or a way to link displayed elements to CurrencyManager list.

Thanks in advance.

Seb

[Administrator]

You can get the grid row indexes of th etop and bottom visible rows using:

int topRowIndex = grid.TopRowIndex;
int botRowIndex = grid.ViewLayout.LastVisibleRow;

To map these to positions in the currencymanager list, you can use grid.Binder.RowIndexToPosition.

int topPosition = grid.Binder.RowIndexToPosition(topRowIndex);
int botPosition = grid.Binder.RowIndexToPosition(botRowIndex );

[Sebastien Thuilliez]

Thanks for your answer Clay.

Anyway I didn''t find the TopRowIndex neither the ViewLayout.LastVisibleRow ... are these method coming from GridControl or GridGroupingControl.

My mistake, I didn''t gave you any information, more details :

I''m using GridGroupingControl with FilterBar .. and due to the filter items I need to only apply computation/process on the displayed rows but the CurrencyManager give me all existing records.

Thanks again for your time !

[Administrator]

If you are using a GridGroupingControl, it is simpler to get the filtered list from the Table.Filteredrecords collection. This collection will hold exactly the records being displayed in the Table.

DataRowView drv = this.gridGroupingControl1.Table.FilteredRecords[position].GetData() as DataRowView;

[Sebastien Thuilliez]

Like you said, I used

MyCustomObject myItem = null;

myItem = groupingControl.Table.FilteredRecords[index].GetData() as MyCustomObject;

and it works perfectly.

It will simplify a lot my source code for this part.

Thanks again for your quick and very effective support.