Question

我在我的Windows Phone 8应用程序中创建了最喜欢的功能。我正在使用形状路径作为明星

 <Path Stroke="Yellow" Grid.Row="0" Grid.Column="0" Tag="{Binding BookId,Mode=OneWay}" Fill="{Binding FavouriteButton,Mode=OneWay}" StrokeThickness="3" StrokeStartLineCap="Round"  Margin="-14,-2,0,0" StrokeEndLineCap="Round" StrokeLineJoin="Round" Data="M 0,0 l 10,0 l 5,-10 l 5,10 l 10,0 l -7,10 l 2,10 l -10,-5 l -10,5 l 2,-10 Z" Tap="Path_Tap_1" />

我喜欢的按钮所在的模型类，应该更改

public class newreleaeslist : INotifyPropertyChanged
{

    public long BookId { get; set; }


    private string _FavouriteButton = "";
    public string FavouriteButton
    {
        get
        {
            return _FavouriteButton;
        }
        set
        {
            _FavouriteButton = value;
            RaisePropertyChanged("FavouriteButton");
        }
    }

    public event PropertyChangedEventHandler PropertyChanged;
    private void RaisePropertyChanged(string propertyName)
    {
        if (this.PropertyChanged != null)
        {
            this.PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
        }
    }
}

我有两个列表，一个是新发布列表，另一个是全景图中的收藏夹列表。当用户点击新发布列表中的add to favourite star时，它将转到隔离存储设置中的favourites list，并将一个项目添加到收藏夹列表中。关于通知的一切都很好。

  IsolatedStorageSettings settings = IsolatedStorageSettings.ApplicationSettings;
        List<long> ListFavourites;
        if (settings.Contains("ListFavourites"))
        {
            ListFavourites = settings["ListFavourites"] as List<long>;
        }
        else
        {
            ListFavourites = new List<long>();
        }

        if (!ListFavourites.Contains(Convert.ToInt64(bt.Tag)))
        {
            ListFavourites.Add(Convert.ToInt64(bt.Tag));
        }
        settings["ListFavourites"] = ListFavourites;
        settings.Save();

1）但是当我点击remove from favourite star

中的favourite list时

2）新发布列表中最喜欢的明星应该改变它不会做的颜色。可能是什么问题？

   Button bt = (Button)sender;
        IsolatedStorageSettings settings = IsolatedStorageSettings.ApplicationSettings;
        List<long> ListFavourites=new List<long>();
        if (settings.Contains("ListFavourites")) 
        {
            ListFavourites = settings["ListFavourites"] as List<long>;
        }
        ListFavourites.Remove(Convert.ToInt64(bt.Tag));
        settings["ListFavourites"] = ListFavourites;
        settings.Save();
        var item = await  bookdetailsvm.GetBookDetails(Convert.ToInt64(bt.Tag),true); 
        var favouritelists = booklistvm.BooksList.FirstOrDefault(m => m.BookId == item.BookId);

        booklistvm.BooksList.Remove(favouritelists);
        RecordCountFavouritesList.Text = booklistvm.BooksList.Count().ToString() + " records found."; 


       foreach (var items in  dashboardvm.NewReleasesbookslist)
        {
            if (items.BookId== item.BookId)
            {

              items.FavouriteButton = "Black";  // change color here
              break;
            }
        }

Answer 1

您的问题是您尝试将Brush属性绑定到字符串，这是不允许的。

更改以下内容：

在你的模特中，

private SolidColorBrush _FavouriteButton = "";
public SolidColorBrush FavouriteButton
{
    get
    {
        return _FavouriteButton;
    }
    set
    {
        _FavouriteButton = value;
        RaisePropertyChanged("FavouriteButton");
    }
}

在foreach，

中

foreach (var items in  dashboardvm.NewReleasesbookslist)
{
    if (items.BookId== item.BookId)
    {
        items.FavouriteButton = new SolidColorBrush(Colors.Black);  // change color here
        break;
    }
}

让我知道它是如何运作的。

编辑：

要使用最初发布的颜色以外的颜色，请尝试以下操作：

foreach (var items in  dashboardvm.NewReleasesbookslist)
    {
        if (items.BookId== item.BookId)
        {
            items.FavouriteButton = new SolidColorBrush((Color)typeof(Color).GetProperty("Black").GetValue(null, null));  // change color here
            break;
        }
    }

请注意，如果您在字符串中输入拼写错误或大写错误，这将无效，但它应该适用于基本颜色。

windows phone 8路径形状绑定通知问题

1 个答案: