获取ItemsControl中当前item的binding数据

直接用 {Binding} 就可以了，如下：

<ItemsControl ItemsSource="{Binding Path=ProcessItems}">
                                    <ItemsControl.ItemsPanel>
                                        <ItemsPanelTemplate>
                                            <WrapPanel IsItemsHost="True"></WrapPanel>
                                        </ItemsPanelTemplate>
                                    </ItemsControl.ItemsPanel>
                                    <ItemsControl.ItemTemplate>
                                        <DataTemplate>
                                            <Border Name="ProcessItemBorder"  Padding="10"  Margin="10" BorderThickness="1" BorderBrush="Black"
                                                    PreviewMouseMove="ProcessItemBorder_OnPreviewMouseMove"
                                                    Tag="{Binding}">
                                                <TextBlock Text="{Binding Path=ItemName}"></TextBlock>
                                            </Border>
                                        </DataTemplate>
                                    </ItemsControl.ItemTemplate>
                                </ItemsControl>