Dynamically modifying Columndefinition Width

See more:

WPF

MVVM

Hi,
I'm a wpf beginner... i'm trying to bind the ColumnDefinition width, Col0 to a property in my viewmodel so that when the ContentControl ContentControl Name="NeedDataEntryControl" is visible ,the Col0 >width = NeedDataEntryControl.width... how do i achieve this when using MVVM pattern..
The xaml is copied below..

<grid scrollviewer.verticalscrollbarvisibility="Disabled" name="allEntityGrid" scrollviewer.previewmousewheel="allEntity_PreviewMouseWheel">
        
        <grid.rowdefinitions>
            <rowdefinition height="*"></rowdefinition>
        </grid.rowdefinitions>
        <grid.columndefinitions>
            <columndefinition name="Col0" sharedsizegroup="shareThis" />
            <columndefinition name="ColSplitter" width="5"></columndefinition>
            <columndefinition name="Col2" width="*"></columndefinition>
        </grid.columndefinitions>
        <border borderthickness="1" borderbrush="#ACACAC">
        <scrollviewer name="NeedScrollViewer" verticalscrollbarvisibility="Auto" previewmousewheel="allEntity_PreviewMouseWheel">
            <grid name="needGrid" visibility="{Binding Path=HighLevelFilterMask, Converter={StaticResource HighLevelFilterMaskToVisibilityForNeed}}">

                <grid.rowdefinitions>
                    <rowdefinition height="Auto"></rowdefinition>
                    <rowdefinition height="*"></rowdefinition>

                </grid.rowdefinitions>
                    <contentcontrol name="NeedDataEntryControl" content="{Binding Path=NewNeedViewModel}" contenttemplate="{DynamicResource NeedDataEntryDataTemplate}">
                    <contentcontrol.style>
                        <Style TargetType="{x:Type ContentControl}">
                            <Style.Triggers>
                                    <datatrigger binding="{Binding Path=NewNeedViewModel.NeedDataEntryControlVisibility}" value="Collapsed">
                                    <setter property="Visibility" value="Collapsed" />
                                </datatrigger>
                                    <datatrigger binding="{Binding Path=NewNeedViewModel.NeedDataEntryControlVisibility}" value="Visible">
                                    <setter property="Visibility" value="Visible" />
                                </datatrigger>
                            </Style.Triggers>
                        </Style>
                    </contentcontrol.style>
                </contentcontrol>

                <local:careplanlistbox isincludedinglobalunselection="True" scrollviewer.horizontalscrollbarvisibility="Disabled" x:name="lstBoxAllNeeds" selectionmode="Single" xmlns:x="#unknown" xmlns:local="#unknown">
                  Grid.Row="1" Grid.Column="0"  HorizontalContentAlignment="Stretch"
                   ItemsSource="{Binding NeedsCollectionView}" ItemContainerStyle="{DynamicResource NeedCarePlanListBoxItem}"
                                        ItemTemplate="{DynamicResource NeedDataTemplateCompact}" AlternationCount="2" BorderThickness="0"></local:careplanlistbox>

            </grid>
        </scrollviewer>
        </border>
        <gridsplitter name="GridSplitter" dragincrement="{Binding }" resizebehavior="PreviousAndNext" removed="#FFFFFF" grid.row="0" grid.column="1" width="Auto" horizontalalignment="Stretch" verticalalignment="Stretch" resizedirection="Columns">
         
        </gridsplitter>


        <listbox isincludedinglobalunselection="True" scrollviewer.horizontalscrollbarvisibility="Disabled" x:name="lstBoxAllExecutions" selectionmode="Single" xmlns:x="#unknown">
               Grid.Row="0" Grid.Column="2"  HorizontalContentAlignment="Stretch"  ItemContainerStyle="{DynamicResource ExecutionCarePlanListBoxItem}"
               ItemTemplate="{DynamicResource ExecutionTemplate}"   ItemsSource="{Binding ExecutionsCollectionView}"
               AlternationCount="2" PreviewMouseWheel="lstAllExecutions_PreviewMouseWheel"
               Visibility="{Binding Path=HighLevelFilterMask, Converter={StaticResource HighLevelFilterMaskToVisibilityForExecution}}"  BorderBrush="#ACACAC" BorderThickness="1">
           
        </listbox>

        

    </grid>