WP7反序列化JSON

我是新來的C＃和有問題下面就行了Addresses address = (Addresses)serializer.ReadObject(e.Result);給InvalidCastException的：WP7反序列化JSON

namespace My_App 
{ 
    [DataContract] 
    public class Addresses 
    { 
     [DataMember(Name = "line1")] 
     public string line1 
     { 
      get; 
      set; 
     } 
     [DataMember(Name = "line2")] 
     public string line2 
     { 
      get; 
      set; 
     } 
     [DataMember(Name = "postcode")] 
     public string rpostcode 
     { 
      get; 
      set; 
     } 
     [DataMember(Name = "city")] 
     public string city 
     { 
      get; 
      set; 
     } 
     [DataMember(Name = "state")] 
     public string state 
     { 
      get; 
      set; 
     }  
    } 


    public partial class sim : PhoneApplicationPage 
    { 

     public sim() 
     { 

      InitializeComponent(); 
     } 

     private void Button_Tap(object sender, System.Windows.Input.GestureEventArgs e) 
     { 
       var webClient = new WebClient(); 

        webClient.OpenReadCompleted += OnOpenReadCompleted; 

        webClient.OpenReadAsync(new Uri("http://www.myurl" UriKind.Absolute)); 

     } 

    } 

    private void OnOpenReadCompleted(object sender, OpenReadCompletedEventArgs e) 
    { 
      var serializer = new DataContractJsonSerializer(typeof(Addresses)); 
      Addresses address = (Addresses)serializer.ReadObject(e.Result); 

    } 

} 
}

JSON：

[ 
    { 
     "@type": "accountAddress", 
     "line1": " 1", 
     "line2": "NORWICH ROAD", 
     "postcode": "NR1 1AU", 
     "city": "NORWICH", 
     "state": "NORFOLK" 
    }, 
    { 
     "@type": "accountAddress", 
     "line1": " 2", 
     "line2": "NORWICH ROAD", 
     "postcode": "NR1 1AU", 
     "city": "NORWICH", 
     "state": "NORFOLK" 
    }, 
    { 
     "@type": "accountAddress", 
     "line1": " 3", 
     "line2": "NORWICH ROAD", 
     "postcode": "NR1 1AU", 
     "city": "NORWICH", 
     "state": "NORFOLK" 
    } 
]

我需要這是在一個合適的格式用於listpicker對象。任何幫助將不勝感激。

來源

2012-06-26 Stu Ayton

這裏的問題是，你的JSON有一組地址，你只是試圖訪問一個地址。換句話說，您的序列化程序返回一個地址列表，但您試圖將其轉換爲單個地址對象。

所以更改您的代碼這樣的事情，

List<Addresses> addressList = (List<Addresses>)serializer.ReadObject(e.Result);

，最終你需要的是一個清單，或將其綁定到ListPicker的集合。

來源

2012-06-27 05:53:27 nkchandra

謝謝，它仍然在該行上拋出InvalidCastException錯誤。我想我已經跟蹤到 - ''（e.Result）.ReadTimeout'拋出了一個'System.InvalidOperationException'類型的異常。「」此流上不支持超時。「}但不知道如何解決這個問題 –

我認爲你必須將序列化程序的初始化更改爲一個列表！ –

非常感謝！ - 更改行讀取'var serializer = new DataContractJsonSerializer（typeof（List ））;'現在它解析正確。什麼是最好的方式來獲得這個數組到列表選擇器的格式 'addressList.line1 addressList.line2 addressList.city addressList.state addressList.rpostcode' –

WP7反序列化JSON

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