Telerik gridview Problem with not being able to retrieve information bound to the cell next to the cell button when clicked

[son]

hello
I am Korean, so please understand that I wrote this in translation.

[inquiry]
As the title suggests, there is a problem with my source code and it cannot be resolved.

I am coding in MVVM method.

1. Enter TEXT in “ChangeDetails” [Cell] of [Grid View]
2. When executing the event of “PgmUpCommand”
3. “ChangeDetails” does not lose focus, and the bound “ChangeDetails” value cannot be retrieved.
4. After doing number 1, click another [Cell] in the [Grid] and execute number 2 to get the “ChangeDetails” value normally.

I would appreciate it if you could tell me the solution.

Below is the source

<telerik:RadGridView x:Name="dataGrid1" Grid.Column="1" IsReadOnly="False"

ItemsSource="{Binding PgmInfoList}"

SelectedItem="{Binding SelectedPgmInfoItem, Mode=TwoWay}" Margin="239,27,-0.2,-0.4" Grid.RowSpan="2" Grid.ColumnSpan="3" >

<i:Interaction.Behaviors>

<behaviors:GridViewBehavior UseSummaryInfo="False" ShowFooterInfo="False"/>

</i:Interaction.Behaviors>

<i:Interaction.Triggers>

<i:EventTrigger EventName="Loaded">

   <prism:InvokeCommandAction Command="{Binding GroupDetailLoadedCommand}" />

</i:EventTrigger>

<i:EventTrigger EventName="CellEditEnded">

   <prism:InvokeCommandAction Command="{Binding CellEditEndedCommand}" />

</i:EventTrigger>

<i:EventTrigger EventName="SelectedCellsChanged">

   <prism:InvokeCommandAction Command="{Binding PgmInfoSelectedCellChangedCommand}"/>

</i:EventTrigger>

<i:EventTrigger EventName="RowEditEnded">

   <prism:InvokeCommandAction Command="{Binding RowEditEndedCommand}"/>

</i:EventTrigger>

</i:Interaction.Triggers>

<telerik:RadGridView.ColumnGroups>

<telerik:GridViewColumnGroup Name="Division" Header="" />

<telerik:GridViewColumnGroup Name="Regist" Header="{Binding [WRD_RegistChangeHistory], Source={StaticResource DRes}}" />

<telerik:GridViewColumnGroup Name="Upload" Header="{Binding [WRD_UploadPGMfile], Source={StaticResource DRes}}" />

</telerik:RadGridView.ColumnGroups>

    <telerik:RadGridView.Columns>

        <telerik:GridViewDataColumn DataMemberBinding="{Binding ChangeDetails, Mode=TwoWay}" IsReadOnlyBinding="{Binding Path=IsEnableReadOnly, Mode=TwoWay}"

                                    Header="{Binding [WRD_ChangeHistory1], Source={StaticResource DRes}}"

                                HeaderCellStyle="{StaticResource GridViewHeaderRowStyleBV}"

                                ColumnGroupName="Regist"/>

        <telerik:GridViewDataColumn Header="{Binding [WRD_UP], Source={StaticResource DRes}}" ColumnGroupName="Upload" HeaderCellStyle="{StaticResource GridViewHeaderRowStyleB}">

            <telerik:GridViewDataColumn.CellTemplate>

                <DataTemplate>

                    <Button

                                Command="{Binding DataContext.PgmUpCommand,  RelativeSource={RelativeSource Mode=FindAncestor, AncestorLevel=1, AncestorType={x:Type telerik:RadGridView}}}"

                                CommandParameter="{Binding}"

                                Content="..." IsEnabled="{Binding PgmUpisEnabled}"/>

                </DataTemplate>

            </telerik:GridViewDataColumn.CellTemplate>

        </telerik:GridViewDataColumn>

    </telerik:RadGridView.Columns>

</telerik:RadGridView>

[Dimitar]

Hi Son, 

Just the XAML is not enough for me to determine why this is not working. Would it be possible to create a small sample project with some sample data and attach it to this thread? This way I have the command implementation as well and I will be able to test this on my side. 

Thank you in advance for your patience and cooperation. I am looking forward to your reply.