GridDropDownCellRenderer and DataRow

[TheoC]

Hi,

I have a custom dropdown control that inherits from GridDropDownCellRenderer. The dropdown is used in gridgroupingcontrols and in a GridControl. I need to get the underlying current DataRow from the CurrentCell in the overriden OnInitialize(int rowIndex, int colIndex) method. Sorting and all other kinds of madness are possible so I can''t rely on the rowIndex or colIndex, just CurrentCell. Please help.

Thanks,
Theo C

[Administrator]

The CurrentCell is not always the cell that is passed to renderer.OnInitailize. In that event, you must get at the infromation using the passed in row and column.

In a groupinggrid, you can get the record through the TableControl using code like:

GridTableCellStyleInfo style = gridGroupingControl.TableControl.Model[row, col];
//get some record data
GridRecordRow grr = style.TableCellIdentity.Table.DisplayElements[row] as GridRecordRow;
DataRowView drv = grr.GetData() as DataRowView;

SInce a GridControl does not have a DataSource, I am not sure how any datarow is being mapped into the GridControl. If you are using a virtual grid and displaying data through the DataTable.DefaultView, then you can get the data through the DataView (or through the CurrencyManager). Maybe like this:

DataRowView drv = dataView1[row-1];

where dataView1 is the dataview you are using to provide the sorted data.

[TheoC]

Thank you for the response, this does not seem to work though. The grr.GetData() allways returns null. I modified the code (last line) to look like this:

GridStyleInfo gsi = this.Grid.Model [this.CurrentCell.RowIndex, this.CurrentCell.ColIndex];

GridTableCellStyleInfoIdentity gtsi = (GridTableCellStyleInfoIdentity) gsi.CellIdentity;

DataRow current_row = (DataRow)gtsi.DisplayElement.EngineTable.CurrentRecordManager.Data;

Which seems to work fine for the parent table, but not for the Nested tables. Why doesn''t it work.

Thank you for the assistance
Theo C

[TheoC]

Ok, so I its workin now. I got it to work by doing the following from within the Custom Dropdown OnInitialize method:

GridTableCellStyleInfo gsi = (GridTableCellStyleInfo) this.Grid.Model[rowIndex, colIndex];

GridTableCellStyleInfoIdentity gtsi = (GridTableCellStyleInfoIdentity) gsi.CellIdentity;

GridRecordRow grr = gtsi.Table.DisplayElements[rowIndex] as GridRecordRow;

DataRow current_row = (DataRow) grr.GetData();

Hope that helps anyone.
Thanks