WP7從子陣列傳遞價值

Question

新的一頁

我從一個頁面傳遞幾個值到下一個。其中一個值位於子數組中。因爲可以有多個I想說如果計數大於一陣列內Artist值，通過「羣星」，否則通過所述單個藝術家值。在這裏，我到目前爲止。

這裏是我的類從所選項目中提取數據

public class RootObject 
{ 
    //public MetadataRelease metadata { get; set; } 
    public Results results = new Results(); 

    public IEnumerator<Results> GetEnumerator() 
    { 
     return this.results.GetEnumerator(); 
    } 
} 
public class Results 
{ 
    public Release release { get; set; } 
    public List<Track> tracks { get; set; } 
    //public List<UsersAlsoBought2> usersAlsoBought { get; set; } 
    //public List<LatestFromLabel2> latestFromLabel { get; set; } 

    internal IEnumerator<Results> GetEnumerator() 
    { 
     throw new NotImplementedException(); 
    } 
} 
public class Track 
{ 
    public int id { get; set; } 
    public bool selected { get; set; } 
    public string type { get; set; } 
    public string name { get; set; } 
    public bool active { get; set; } 
    public string mixName { get; set; } 
    public string title { get; set; } 
    public string slug { get; set; } 
    public string isrc { get; set; } 
    public string releaseDate { get; set; } 
    public string publishDate { get; set; } 
    public string sampleUrl { get; set; } 
    public string rtmpStreamUrl { get; set; } 
    public bool exclusive { get; set; } 
    public Price2 price { get; set; } 
    public AudioFormatFee2 audioFormatFee { get; set; } 
    public string currentStatus { get; set; } 
    public string length { get; set; } 
    public int bpm { get; set; } 
    public Key key { get; set; } 
    public string saleType { get; set; } 
    public List<Artist2> artists { get; set; } 
    public List<Genre2> genres { get; set; } 
    public List<object> subGenres { get; set; } 
    public List<object> charts { get; set; } 
    public Release2 release { get; set; } 
    public Label2 label { get; set; } 
    public Images2 images { get; set; } 
    public DynamicImages2 dynamicImages { get; set; } 
} 
public class Artist2 
{ 
    public int id { get; set; } 
    public string name { get; set; } 
    public string slug { get; set; } 
    public string type { get; set; } 
} 

代碼。

public void musicSampleSelectedHandler(object sender, RoutedEventArgs e) 
    { 
     Track selectedTrack = (sender as Image).DataContext as Track; 
     ListBoxItem pressedItem = this.listReleaseMain.ItemContainerGenerator.ContainerFromItem(selectedTrack) as ListBoxItem; 

     if (pressedItem != null) 
     { 
      string _rN = selectedTrack.release.name; 
      string _rT = selectedTrack.title; 
      string _rS = selectedTrack.sampleUrl; 
      string _rI = selectedTrack.images.large.url; 
      string _rA; 

      if (selectedTrack.artists.Count > 1) 
      { 
       _rA = "Various Artists"; 
      } 
      else 
      { 
       for (int i = 0; i <= selectedTrack.artists.Count - 1; i++) 
        _rA += "," + selectedTrack.artists[i].name; 
      } 

      this.NavigationService.Navigate(new Uri("/Pages/MediaPage.xaml?releaseUrl=" + _rS + "&releaseTrack=" + _rT + "&releaseImg=" + _rI + "&releaseName=" + _rN + "&releaseArtist=" + _rA, UriKind.Relative)); 
     } 
    } 

UPDATE

我現在得到一個 「未分配使用局部變量_ra的」 內for循環

Answer 1

這是因爲您聲明_RA內 「的if/else」 語句。你應該在外面的if/else聲明_RA與其他聲明一起。

的問題，夫婦......

不宜string _rA = selectedTrack.artists.name是string _rA = selectedTrack.artists[i].name？

if (selectedTrack.artists.Count > 1) 
      { 
       string _rA = "Various Artists"; 
      } 
      else 
      { 
       for (int i = 0; i <= selectedTrack.artists.Count; i++) 
       { 
        string _rA = selectedTrack.artists.name; //Unable to access name vaule here 
       } 
      } 

不應該的上方：

string _rA; 

if (selectedTrack.artists.Count > 1) 

{ 


    for (int i = 0; i <= selectedTrack.artists.Count; i++) 
     _rA += "," + selectedTrack.artists[i].name; 
} 
else 
{ 
_rA = "Various Artists"; 


}