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Problem with DragDrop and Gridview

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Cameron Molyneux
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Cameron Molyneux asked on 04 Mar 2010, 08:37 PM
I am trying to drag drop from a gridview to another control ,, this works okay but if the grid has a scrollbar that i want to scroll it initiases a drag drop rather than letting me scroll

this makes scrolling difficult .. even more difficult with the 'thin' scroll bar you get when you apply the windows 7 theme

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Miroslav
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answered on 09 Mar 2010, 01:22 PM
Hi Cameron Molyneux,

It seems that you are making the whole grid draggable (AllowDrag="true"). If you set this property on the individual rows the drag should not start when the mouse is over he scrollbar.

Your handlers will remain almost the same since you are handling routed events.

I can suggest setting the AllowDrag property using a row style.

Do you think this will work for you?

Best wishes,
Miroslav
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Cameron Molyneux
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answered on 12 May 2010, 01:59 PM
Sorry I have only just got back to this

Can you supply an example of this as I don't understand how to use the row style

many thanks
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Tina Stancheva
Telerik team
answered on 12 May 2010, 02:04 PM
Hi Cameron Molyneux,

You can set the RadDragAndDropManager.AllowDrag property on the individual rows, like so:

<telerikGrid:RadGridView x:Name="radGridView1" ScrollViewer.HorizontalScrollBarVisibility="Auto"
            IsReadOnly="False" Style="{DynamicResource RadGridCellStyle}">
    <telerikGrid:RadGridView.RowStyle>
        <Style TargetType="{x:Type telerikGridView:GridViewRow}">
            <Setter Property="telerikDragDrop:RadDragAndDropManager.AllowDrag" Value="True" />
        </Style>
    </telerikGrid:RadGridView.RowStyle>
</telerikGrid:RadGridView>

Give it a try and let us know fi it works for you.

Greetings,
Tina Stancheva
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Cameron Molyneux
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answered on 12 May 2010, 02:23 PM
thanks but i'm also trying to impliment this in WPF but cant .. can you post the wpf version too

(sorry to be a pain!)
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Cameron Molyneux
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answered on 12 May 2010, 02:44 PM
                    <telerik:RadGridView x:Name="selectableOrdersGrid" Margin="0"   
                             d:LayoutOverrides="Width" EditTriggers="None"   
                             RowIndicatorVisibility="Collapsed"   
                             AutoGenerateColumns="False" CanUserFreezeColumns="False"   
                             CanUserReorderColumns="False" CanUserResizeColumns="False"   
                             CanUserSortColumns="False" ShowGroupPanel="False" Grid.Row="1" 
                             MouseDoubleClick="selectableOrdersGrid_MouseDoubleClick" 
                             Style="{DynamicResource RadGridCellStyle}">  
                        <telerik:RadGridView.RowStyle>  
                            <Style TargetType="{x:Type telerik:GridViewRow}">  
                                <Setter Property="telerik:GridViewRow.AllowDrop" Value="True" />  
                            </Style>  
                        </telerik:RadGridView.RowStyle>  
 
 
                    </telerik:RadGridView> 

The above code compiles as I have used Allow Drop ...

If i try to use AllowDrag it complains saying cant find the Style Property AllowDrag
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Cameron Molyneux
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answered on 12 May 2010, 04:10 PM
please ignore .. i implemented your example fix incorrectly .. when i implemented it correctly it worked :)
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Miroslav
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Cameron Molyneux
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Tina Stancheva
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