2 Answers, 1 is accepted

here's the code. The list box has the following handlers added in code behind, the whole page has been working fine until I installed the Q2 update??
RadDragAndDropManager.AddDragQueryHandler(memberList, onListBoxDragQuery);
RadDragAndDropManager.AddDragInfoHandler(memberList, onListBoxDragInfo);
<
UserControl
xmlns:telerik
=
"http://schemas.telerik.com/2008/xaml/presentation"
x:Class
=
"WAC_Races_WPF.View.RaceDay"
xmlns:telerikDragDrop
=
"clr-namespace:Telerik.Windows.Controls.DragDrop;assembly=Telerik.Windows.Controls"
mc:Ignorable
=
"d"
d:DesignHeight
=
"240"
d:DesignWidth
=
"650"
>
<
Grid
>
<
telerik:RadDocking
BorderBrush
=
"{x:Null}"
BorderThickness
=
"0"
Padding
=
"0"
>
<
telerik:RadDocking.DocumentHost
>
<
telerik:RadSplitContainer
Orientation
=
"Horizontal"
>
<
telerik:RadPaneGroup
>
<
telerik:RadPane
>
<
Grid
>
<
Grid.RowDefinitions
>
<
RowDefinition
Height
=
"40"
/>
<
RowDefinition
/>
</
Grid.RowDefinitions
>
<
telerik:RadGridView
Grid.Row
=
"1"
x:Name
=
"resultsView"
ShowColumnFooters
=
"True"
IsFilteringAllowed
=
"False"
CanUserDeleteRows
=
"True"
CanUserReorderColumns
=
"False"
ShowGroupPanel
=
"False"
telerikDragDrop:RadDragAndDropManager.AllowDrop
=
"True"
ItemsSource
=
"{Binding Path=CurrentRace.Results}"
AutoGenerateColumns
=
"False"
>
<
telerik:RadGridView.Columns
>
<
telerik:GridViewDataColumn
DataMemberBinding
=
"{Binding MemberName}"
Header
=
"Member Name"
IsReadOnly
=
"True"
>
<
telerik:GridViewDataColumn.AggregateFunctions
>
<
telerik:CountFunction
Caption
=
"Members: "
/>
</
telerik:GridViewDataColumn.AggregateFunctions
>
</
telerik:GridViewDataColumn
>
<
telerik:GridViewDataColumn
DataMemberBinding
=
"{Binding Cost}"
Header
=
"Charge"
IsReadOnly
=
"True"
DataFormatString
=
"{}{0:c}"
>
<
telerik:GridViewDataColumn.AggregateFunctions
>
<
telerik:SumFunction
ResultFormatString
=
"{}Total:{0:c}"
/>
</
telerik:GridViewDataColumn.AggregateFunctions
>
</
telerik:GridViewDataColumn
>
<
telerik:GridViewDataColumn
DataMemberBinding
=
"{Binding Handicap, Mode=TwoWay}"
Header
=
"Handicap Grp"
/>
<
telerik:GridViewMaskedTextBoxColumn
DataMemberBinding
=
"{Binding HandicapString}"
Header
=
"Start Time"
MaskType
=
"DateTime"
Mask
=
"mm-ss"
/>
<
telerik:GridViewMaskedTextBoxColumn
DataMemberBinding
=
"{Binding rTime}"
Header
=
"Stop Watch Time"
IsVisible
=
"{Binding ElementName=tbStopWatch, Path=IsChecked}"
>
<
telerik:GridViewMaskedTextBoxColumn.CellTemplate
>
<
DataTemplate
>
<
telerik:RadMaskedTextBox
Value
=
"{Binding rTime}"
MaskType
=
"DateTime"
Mask
=
"HH:mm:ss"
/>
</
DataTemplate
>
</
telerik:GridViewMaskedTextBoxColumn.CellTemplate
>
<
telerik:GridViewMaskedTextBoxColumn.CellEditTemplate
>
<
DataTemplate
>
<
telerik:RadMaskedTextBox
Value
=
"{Binding rTime, Mode=TwoWay}"
Mask
=
"{Binding Path=HourMask}"
MaskType
=
"DateTime"
/>
</
DataTemplate
>
</
telerik:GridViewMaskedTextBoxColumn.CellEditTemplate
>
</
telerik:GridViewMaskedTextBoxColumn
>
</
telerik:RadGridView.Columns
>
</
telerik:RadGridView
>
</
Grid
>
</
telerik:RadPane
>
</
telerik:RadPaneGroup
>
</
telerik:RadSplitContainer
>
</
telerik:RadDocking.DocumentHost
>
<
telerik:RadSplitContainer
InitialPosition
=
"DockedLeft"
>
<
telerik:RadPaneGroup
>
<
telerik:RadPane
CanUserClose
=
"False"
>
<
Grid
>
<
Grid.RowDefinitions
>
<
RowDefinition
Height
=
"30"
/>
<
RowDefinition
/>
</
Grid.RowDefinitions
>
<
Grid
>
<
Grid.ColumnDefinitions
>
<
ColumnDefinition
Width
=
"Auto"
/>
<
ColumnDefinition
/>
</
Grid.ColumnDefinitions
>
<
Label
Content
=
"Search"
FontWeight
=
"Bold"
Grid.Column
=
"0"
/>
<
TextBox
x:Name
=
"txtFilter"
Grid.Column
=
"1"
Text
=
"{Binding Path=FilterText, Mode=TwoWay}"
TextChanged
=
"txtFilter_TextChanged"
/>
</
Grid
>
<
ListBox
Margin
=
"10,10,10,10"
Grid.Row
=
"1"
x:Name
=
"memberList"
ItemsSource
=
"{Binding Path=FilterMembers}"
VerticalAlignment
=
"Stretch"
HorizontalAlignment
=
"Stretch"
HorizontalContentAlignment
=
"Stretch"
telerikDragDrop:RadDragAndDropManager.AllowDrag
=
"True"
>
<
ListBox.ItemTemplate
>
<
DataTemplate
>
<
Border
BorderBrush
=
"DarkGray"
BorderThickness
=
"1"
Padding
=
"2"
Margin
=
"1"
>
<
Grid
>
<
Grid.RowDefinitions
>
<
RowDefinition
Height
=
"15"
/>
<
RowDefinition
Height
=
"14"
/>
</
Grid.RowDefinitions
>
<
Grid.ColumnDefinitions
>
<
ColumnDefinition
Width
=
"90"
/>
<
ColumnDefinition
Width
=
"Auto"
/>
</
Grid.ColumnDefinitions
>
<
TextBlock
Grid.ColumnSpan
=
"2"
Grid.Row
=
"0"
Text
=
"{Binding Path=FullName}"
FontWeight
=
"Bold"
/>
<
TextBlock
Grid.Column
=
"0"
Grid.Row
=
"1"
Text
=
"{Binding Path=MembershipString}"
/>
<
TextBlock
Grid.Column
=
"1"
Grid.Row
=
"1"
Text
=
"{Binding Path=mGrpID}"
/>
</
Grid
>
</
Border
>
</
DataTemplate
>
</
ListBox.ItemTemplate
>
<
ListBox.ItemContainerStyle
>
<
Style
TargetType
=
"ListBoxItem"
>
<
Setter
Property
=
"telerikDragDrop:RadDragAndDropManager.AllowDrag"
Value
=
"True"
/>
<
Setter
Property
=
"telerikDragDrop:RadDragAndDropManager.AllowDrop"
Value
=
"True"
/>
</
Style
>
</
ListBox.ItemContainerStyle
>
</
ListBox
>
</
Grid
>
</
telerik:RadPane
>
</
telerik:RadPaneGroup
>
</
telerik:RadSplitContainer
>
</
telerik:RadDocking
>
</
Grid
>
</
UserControl
>
Since Q2 we have introduced new API with improved support in many scenarios(http://www.telerik.com/help/wpf/dragdropmanager-overview.html). The events of the RadDragAndDropManager are still executed, however the new drag mechanism is used.
The problem you are facing is due to the fact that WPF listbox captures the mouse on mouseleftbutton down and thus suppress DragDropManager drag mechanism.
There are several solutions to this issue:
- Set drag execution mode to legacy - http://www.telerik.com/help/wpf/raddragdropmanager-howto-change-drag-execution-mode.html
- Add DragDropManager.AllowCapturedDrag="true" in addition to RadDragAndDropManager.AllowDrag="true"
Let us know if you have any further issues regarding this.
Tsvyatko
the Telerik team
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