Unbound checkbox column in grid

I have implememted the CustomUnboundColumnData event and that seems to work however, I cannot get the value of a hidden column from the row. I loop through the rows using the DataRowCount which apparently only looks at visible columns. How can I iterate through the grid, if the row is checked, then get the value of my hidden column in that row. Here is the code I am using:

C#
StringBuilder sbStoreIdList = new StringBuilder();  
for (int i = 0; i < gvwStores.DataRowCount; i++)  
{  
    if (Convert.ToInt32(gvwStores.GetRowCellValue(i, "bInclude")) == 1)  
    {  
        if (sbStoreIdList.Length > 0)  
            sbStoreIdList.Append(",");  
        sbStoreIdList.Append(gvwStores.GetRowCellValue(i, "StoreId").ToString());  
    }  
}  

Nevermind, I figured it out. I guess the fieldname is case sensitive. It should've been StoreID instead of StoreId.

Thank you for providing the status update. I'll make this issue closed -- please feel free to respond at this thread to reactivate this ticket at any time.

I need to reactivate this. The CustomUnboundColumnData even only seems to trigger if I change the selected row. The even doesn't fire if I stay on the same row and check/uncheck the box. I need to be able to load another grid when the checkbox is checked or unchecked. Is this possible?

Thanks for the update, Greg.
You may handle the BaseEdit.EditValueChanging event of your RepositoryItemCheckEdit at the GridColumn.ColumnEdit property of your unbound field's column. I've modified the attachment to also implement this approach.
I now explicitly assign a RepositoryItemCheckEdit instance to the unbound column to ensure the repository item is initialized with the unbound column.
Please let me know how this works on your side.

This is almost there but it is always one click behind. It does not see the checkbox as being checked when the EditValueChanging event fires. I have even tried putting it in the EditValueChanged event and it still doesn't work correctly. My code is what I have above for looping through the stores but then I also do the following to update the other grid:

C#
DataTable dt = ScheduledPrice.SelectScheduleCommodities(ScheduleId, sbStoreIdList.ToString());  
grdCommodities.DataSource = dt;  

If I check the box for row 1, the grid doesn't load until I move to another row. Also, it doesn't see the correct state of the CheckEdit in either event.

Hi Greg,
It seems that you request data from a grid before this data is posted. Data is saved after a user leaves a cell. You can force a value to be saved if you handle the RepositoryItemCheckEdit.EditValueChanged event with the following code and call the GridView.PostEditor method there:

C#
gridView1.PostEditor();  

Alternatively, you can get an actual checkbox state from the DevExpress.XtraEditors.Controls.ChangingEventArgs.NewValue field in the RepositoryItem.EditValueChanging event handler.
If you have additional questions in this regard, we will be glad to help you.

PostEditor method seemed to do the trick. Thanks!