给你一个集合,集合中每项都有两个字段用户头像地址(string)和在线状态(bool)

要求在Listbox中直接用绑定实现,大虾们帮帮忙呀

下面是我自己写的(但有问题):

   <Image Width="50"    x:Name="img"  >
                                <Image.Resources>

 <BitmapImage x:Key="OnLine"  DecodePixelWidth="200" UriSource="{Binding HeadPic, Converter={StaticResource BitMapImgUriConvert}}"></BitmapImage>
                                    <FormatConvertedBitmap x:Key="OffLine" Source="{StaticResource OnLine}"  DestinationFormat="Gray32Float"/>
                                </Image.Resources>
                                <Image.Style>
                                    <Style  TargetType="Image">
                                        <Style.Triggers>
                                            <DataTrigger Binding="{Binding State}" Value="True">
                                                <Setter Property="Source" Value="{StaticResource OnLine}"></Setter>
                                            </DataTrigger>
                                            <DataTrigger Binding="{Binding State}" Value="False">
                                                <Setter Property="Source" Value="{StaticResource OffLine}"></Setter>
                                            </DataTrigger>
                                        </Style.Triggers>
                                    </Style>
                                </Image.Style>
                            </Image>