Drag & Drop between two grids

Hi Sasha,

Thanks for the response. I've made changes to my code (please see below) similar to the sample application you sent but I'm still not able to drag from one grid to the other.

I notice that the example you sent uses integers for the primary key, whereas I'm using guids - I raised a ticket recently (T634142) regarding treeviews where it didn't seem to like using guids - perhaps this is the same problem? I've tried setting the LocationID to nulland to DBNull.Value, when 'unallocating' an item but neither work. Also, when using the GetRowCellValue() method after setting the value, I see that the value is not being changed - I've tried the actual guid and the guid.ToString()

I also notice that neither grid in the example uses a filter - In my case one grid filters for non-allocated items and the other filters for allocated items - this could be confusing the DragDrop event because both grids use the same binding source, but the table adapter isn't updated until later when the user clicks a SAVE button.

The act of dropping a row onto the other grid should mean that the row in one grid does not now match its filter, and the row in the other grid should now be a match with the filter - however, dropping the row does nothing (please see attached video).

The code I am now using is:

C#
private void dragDropEvents1_DragDrop_1(object sender, DragDropEventArgs e)  
        {  
            var handles = (int[])e.Data;  
            GridView tar = e.Target as GridView;  
            if (tar.Name == "gridView1")  
            {  
                Guid? lhid = treeList1.FocusedNode.GetValue("LocationHierarchyID") as Guid?;  
                (e.Target as GridView).SetRowCellValue(handles[0], "LocationHierarchyID", lhid);  
                //(e.Target as GridView).SetRowCellValue(handles[0], "LocationHierarchyID", lhid.ToString());  
                //(e.Source as GridView).SetRowCellValue(handles[0], "LocationHierarchyID", null);  
                (e.Source as GridView).SetRowCellValue(handles[0], "LocationHierarchyID", DBNull.Value);  
            }  
            else  
            {  
                //(e.Target as GridView).SetRowCellValue(handles[0],"LocationHierarchyID", null);  
                //(e.Source as GridView).SetRowCellValue(handles[0], "LocationHierarchyID", null);  
                (e.Target as GridView).SetRowCellValue(handles[0], "LocationHierarchyID", DBNull.Value);  
                (e.Source as GridView).SetRowCellValue(handles[0], "LocationHierarchyID", DBNull.Value);  
            }  
            e.Handled = true;  
        }  

One grid is a copy of the other grid, but they are given different filters in the page load() event, and the column names differ as duplicates are not permitted. They both allow editing (which is denied in the example you sent) because there are many hidden columns which are displayed in an EditForm. There are also 11 repository editors (mostly gridlookupedits) in both.

Hello Richard,

I am happy to hear that you found an appropriate solution. Thank you for informing us.
Should you have further questions, let me know.

Hi
I'm trying to move a row to an empty grid, in Behavior_DragOver (object sender, DragOverEventArgs e) I am getting var args = DragOverGridEventArgs.GetDragOverGridEventArgs (e); value InsertType = None. As a result, the layout of the line is not drawn, and the cursor informs about the impossibility of moving. Should I enable additional options?

Robert Troska

Hello,

I've created a separate ticket on your behalf (T835296: How to drag a row to an empty grid). It has been placed in our processing queue and will be answered shortly.