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LongListSelector中的图片控件问题 RRS feed

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  • Question
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    我希望用LongListSelector来实现选择游戏关数，可是出现了很奇怪的现象。
    在LongListSelector的"ItemTemplate"中我为每个item创建了两个控件，
    <TextBlock Text="{Binding GS}" Style="{StaticResource PhoneTextLargeStyle}" FontFamily="Portable User Interface" Tap="TextBlock_Tap"  />
     <Image Tag="{Binding GS}" Source="/Assets/Tiles/co.png" Visibility="Visible" HorizontalAlignment="Right" Loaded="Image_Loaded_1"/>
    Textblock用于显示关数，图片显示是否通关
    并且在image的Tag绑定关数，便于判断是否通关，Loaded事件用于在进入界面时检测是否通关
     private void Image_Loaded_1(object sender, RoutedEventArgs e)
            {
                Image image = sender as Image;
                string temp = "chuangguan" + image.Tag.ToString().Substring(1, image.Tag.ToString().Length - 2);
                if (Convert.ToInt32(Sto.save_inf[temp]) == 1)
                {
                    image.Visibility = Visibility.Visible;
                }
            }
    刚进入界面时，一切正常，只有第二关通关，因此只有它旁边的图片显示。

    但是在点击索引（就是通讯录的A，B，C，D....的那些键）后，第二关旁边的图片隐藏了，但是变成其它的某个图片显示了，请问这个是怎么回事，或者有没有其它的解决方法
    2014年7月7日 14:38
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答案

  • Question
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    你好，

    请参考：

    <!--Pivot item one-->
<phone:PivotItem Header="Browse">
	<Grid>
		<phone:LongListSelector Name="llsGameList" ItemsSource="{Binding}" Tap="llsGameList_Tap" Margin="0,90,0,0">
			<phone:LongListSelector.ItemTemplate>
				<DataTemplate>
					<Grid>
						<my:SafePicture>
							<Image Name="imgGameList" Margin="0,10,0,10" Stretch="Fill" HorizontalAlignment="Left" VerticalAlignment="Top" Height="200" Width="150">
								<Image.Source>
									<BitmapImage UriSource="{Binding BoxArtFrontThumb}"
						 CreateOptions="BackgroundCreation" DecodePixelHeight="200" DecodePixelWidth="150" />
								</Image.Source>
							</Image>
						</my:SafePicture>
					</Grid>
				</DataTemplate>
			</phone:LongListSelector.ItemTemplate>
		</phone:LongListSelector>
	</Grid>
</phone:PivotItem> 


    public class SafePicture : System.Windows.Controls.ContentControl
{
    public SafePicture()
    {
        this.Unloaded += this.SafePictureUnloaded;
    }

    private void SafePictureUnloaded(object sender, System.Windows.RoutedEventArgs e)
    {
        var image = this.Content as System.Windows.Controls.Image;

        if (image != null)
        {
            image.Source = null;
        }
    }
}

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    2014年7月8日 8:23
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    版主