用C讀取Json文件＃

Question

如何讀取我的json對象。我有以下的JSON JSON文件

{ 
    "DBEnvironment": [ 
     { 
      "dbID": 1, 
      "dbName": "Develop" 
     }, 
     { 
      "dbID": 2, 
      "dbName": "Test" 
     }, 
     { 
      "dbID": 3, 
      "dbName": "Production" 
     } 
    ] 
} 

我有一個叫DBEnvironment作爲類遵循

class DBEnvironment : INotifyPropertyChanged 
    { 
     #region Data 

     private int _dbID; 
     private string _dbName; 

     #endregion 

     #region Contructor 

     public DBEnvironment(int id, string name) 
     { 
      _dbID = id; 
      _dbName = name; 
     } 

     #endregion 
     public int dbId 
     { 
      get { return _dbID; } 
      set 
      { 
       _dbID = value; 
       OnPropertyChanged("ID changed"); 
      } 
     } 
     public string dbName 
     { 
      get { return _dbName; } 

      set 
      { 
       _dbName = value; 
       OnPropertyChanged("Database Name"); 
      } 
     } 
    } 

我閱讀下列代碼

string json = File.ReadAllText(path); 
DBEnvironment dblist = JsonConvert.DeserializeObject<DBEnvironment>(json); 
MessageBox.Show(dblist.dbName); 

文件，但DBLIST是空的。如何解決這個問題？

Answer 1

您的JSON改成這樣：

[ 
    { 
     "dbId": 1, 
     "dbName": "Develop" 
    }, 
    { 
     "dbId": 2, 
     "dbName": "Test" 
    }, 
    { 
     "dbId": 3, 
     "dbName": "Production" 
    } 
] 

，改變你的C＃這樣的：

string json = File.ReadAllText(path); 
DBEnvironment[] dblist = JsonConvert.DeserializeObject<DBEnvironment[]>(json); 
MessageBox.Show(dblist[0].dbName); 

您還需要一個空白構造

#region Contructor 

public DBEnvironment() 
{ 
    // Leave blank 
} 

public DBEnvironment(int id, string name) 
{ 
    _dbID = id; 
    _dbName = name; 
} 

#endregion 

---

說明

您正在尋找的DBEnvironment集合，讓你的JSON只是需要括號[...]用花括號{...}的DBEnvironment每個定義。像這樣：

[ 
    {...}, // First DBEnvironment 
    {...}, // Second 
    {...} // Third 
] 

你的代碼需要反序列化一個集合，所以選擇一個數組就可以了。