Question

我写了一个usercontrol，向我的页面显示Google Admod。这个控件很简单，只有1个网格（LayoutRoot），1个图像（从我的数据库中随机获取），以显示何时无法获得广告。在每个页面上我都有此控件，我请求新广告并添加到此LayoutRoot。问题是，重复创建此用户控件（当页面之间的导航具有此控件时）导致内存泄漏（由于背景图像或谷歌浏览器，我不确定）。所以现在我想把这个控件实现给Idispose，但我仍然感到困惑：

我可以（并且我是否需要）为UserControl实现Idispose？
如果我这样做，我的页面会在页面完成后调用处理此控件吗？

实现IDispose的正确方法是什么？按照this我写了一个测试，但我不确定这是否正确？

bool disposed = false;
public void Dispose()
{
    Dispose(true);
    GC.SuppressFinalize(this);
}
protected virtual void Dispose(bool disposing)
{
    if (disposed)
        return;

    if (disposing)
    {
        // I'm don't know what to put here ?
    }
    adview.FailedToReceiveAd -= adview_FailedToReceiveAd;
    adview.ReceivedAd -= adview_ReceivedAd;
    adview = null;
    request = null;
    imgMyAd.Source = null;
    imgMyAd = null;
    disposed = true;
}

~AdPro()
{
    Dispose(false);
}

这是我的UserControl：

<UserControl>
    <Grid x:Name="LayoutRoot" Background="Black" Height="60">
        <Image x:Name="imgMyAd" Height="{Binding Height ,ElementName=LayoutRoot}"
                Width="{Binding Width ,ElementName=LayoutRoot}" Stretch="Fill"/>            
        <Grid x:Name="AdMob">                          
        </Grid>
    </Grid>
</UserControl>

c＃

public partial class AdPro : UserControl
{
    public AdPro()
    {            
        InitializeComponent();
        this.DataContext = App.AdControlD;
        imgMyAd.Source = GetRandomBGImg();     // get the image from my server
        if (App.IsNetworkAvailable)          // check if internet's available
        {                 
            AddAdtoGrid();                
        }
    }

    AdRequest request = null;
    AdView adview = null;

    public void AddAdtoGrid()
    {
        adview = new AdView()
        {                
            AdUnitID="xxxxxx‏",
            Format = AdFormats.Banner,
            VerticalAlignment = System.Windows.VerticalAlignment.Center,
            HorizontalAlignment = System.Windows.HorizontalAlignment.Center
        };
        AdMob.Children.Add(adview);
        request = new AdRequest();
        request.ForceTesting = true;
        adview.FailedToReceiveAd += adview_FailedToReceiveAd;
        adview.ReceivedAd += adview_ReceivedAd;
        adview.LoadAd(request);
    }

    void adview_ReceivedAd(object sender, AdEventArgs e)
    {
        Debug.WriteLine("get ad success");            
    }

    void adview_FailedToReceiveAd(object sender, AdErrorEventArgs e)
    {
        Debug.WriteLine("get ad failed: " + e.ErrorCode);
    }

}

我应该为UserControl实现IDispose

0 个答案: