in the XamTileView, we define template for the TilePaneHeaderTemplate, which have a label to show the name & a button to delete this item.

when we just put it in a single project, it can work well. however when we integrate it into a MVVM project, all seems well, but the delete button failed, there is no reply even we just let it pop up a message, we just get Null information during the debug mode.

can anyone give some advice to me or should i provide more information?

the XamTileView is as follows,

        <ig:XamTileView Grid.Row="0" UseLayoutRounding="False" x:Name="ImgPreview" MinHeight="400" ItemsSource="{Binding Models, Mode=TwoWay}"
                ColumnsInPage="3"                                     
                RowsInPage="2"
                MaximizedStateChanged="ImagePreview_MaximizedStateChanged"
                   TilePaneHeaderTemplate="{StaticResource CommonPreviewHeader}"
                TilePaneContentTemplate="{StaticResource CommonPreview}"
                PageIndex="{Binding Ipages, Mode=TwoWay}">
        </ig:XamTileView>

the template is as follows,

        <DataTemplate x:Key="CommonPreviewHeader">
            <Grid>
                <Grid.ColumnDefinitions>
                    <ColumnDefinition Width="*"></ColumnDefinition>
                    <ColumnDefinition Width="*"></ColumnDefinition>
                </Grid.ColumnDefinitions>
                <Button x:Name="btnDeleteImage"  VerticalAlignment="Top" Command="{Binding SaveCommand}"   Grid.Column="0" Content="x"></Button>
                <!--<Button DataContext="{Binding Image_Name}" x:Name="btnDeleteImage" Command="{Binding BtnDelImageCommand}" VerticalAlignment="Top"   Grid.Column="0" Content="x" Visibility="Collapsed">
                </Button>--><!--<Button DataContext="{Binding RealImage}" x:Name="btnDeleteImage" VerticalAlignment="Top"   Grid.Column="0" Content="x">
                    <Interactive:Interaction.Triggers>
                        <Interactive:EventTrigger EventName="Click">
                            <Interactive:InvokeCommandAction x:Name="deleteImage" Command="{Binding Source={StaticResource Images}, Path=BtnDelImageCommand}" CommandParameter="{Binding DataContext, ElementName=btnDeleteImage}"></Interactive:InvokeCommandAction>
                        </Interactive:EventTrigger>
                    </Interactive:Interaction.Triggers>
                </Button>-->                <TextBlock Grid.Column="1" Text="{Binding Original_Image_Name}" FontStretch="Expanded" VerticalAlignment="Center" FontWeight="Black" FontSize="12"/>
            </Grid>
        </DataTemplate>