將DataTable轉換爲JSON

Question

我有以下代碼。

public class Game 
{ 
    public string gamenumber { get; set; } 
    public string league { get; set; } 
    public string date { get; set; } 
} 

public class getGames 
{ 
    public List<Game> games { get; set; } 
} 

dt = mySQL.getAsDataTable("SELECT gamenumber, date, league FROM vSpiele WHERE gamenumber LIKE '" + sgamenumber + "'", null); 

var getGames = new getGames 
{ 
    games = new List<Game> 
    { 
     new Game 
     { 
      gamenumber = dt.Rows[0]["gamenumber"].ToString(), 
      league = dt.Rows[0]["league"].ToString(), 
      date= dt.Rows[0]["date"].ToString(), 
     } 
    } 
}; 
string json = JsonConvert.SerializeObject(getSpiele); 

我的輸出如下：

{ 
    "Games": [{ 
     "gamenumber": "123456", 
     "league": "Test League", 
     "date": "03.09.2016 15:00:00", 
    }] 
} 

我的問題是我需要的不僅是行0，我需要的表的所有行。我想用for循環來解決問題，但我總是遇到一個錯誤。有沒有人有一個想法，我怎麼來到桌子的剩餘數據？

Answer 1

你通過你的數據表中的行需要循環，因爲有一個指標沒有真正的需要，你可以使用foreach代替for-loop：

dt = mySQL.getAsDataTable("SELECT gamenumber, date, league FROM vSpiele 
          WHERE gamenumber LIKE '" + sgamenumber + "'", null); 

var getGames = new getGames(); 
getGames.games = new List<Game>(); 
foreach(DataRow row in dt.Rows) 
{ 
    getGames.games.Add(new Game(){ 
     gamenumber = row["gamenumber"].ToString(), 
     league = row["league"].ToString(), 
     date= row["date"].ToString() 
    }); 
} 
string json = JsonConvert.SerializeObject(getSpiele); 

或者你可以使用LINQ，如果你喜歡：

var games = (from DataRow row in dt.Rows 
select new Game() { 
    gamenumber = row["gamenumber"].ToString(), 
    league = row["league"].ToString(), 
    date = row["date"].ToString() 
}).ToList(); 

Answer 2

假設dt是DataTable，你可以做一個foreach循環，像這樣：

var games = new List<Game>(); 

foreach(DataRow row in dt.Rows) 
{ 
    games.add(new Game() 
    { 
    gamenumber = row["gamenumber"].ToString(), 
    league = row["league"].ToString(), 
    date= row["date"].ToString() 
    }); 
} 

Answer 3

您應該能夠遍歷數據表中的所有行，如下所示：

public string ConvertDataTabletoJSON(DataTable dt) 
{ 
    List < Dictionary < string, object >> rows = new List < Dictionary < string, object >>(); 
    Dictionary < string, object > row; 
    foreach(DataRow dr in dt.Rows) 
    { 
     row = new Dictionary < string, object >(); 
     foreach(DataColumn col in dt.Columns) { 
      row.Add(col.ColumnName, dr[col]); 
     } 
     rows.Add(row); 
    } 
    System.Web.Script.Serialization.JavaScriptSerializer serializer = new System.Web.Script.Serialization.JavaScriptSerializer(); 
    serializer.Serialize(rows); 
} 

如果您需要：

dt = mySQL.getAsDataTable("SELECT gamenumber, date, league FROM vSpiele WHERE gamenumber LIKE '" + sgamenumber + "'", null); 
var allGames = new getGames { games = new List<Game>() }; 

foreach(DataRow dr in dt.Rows) 
{     
    allGames.games.Add(new Game 
    { 
     gamenumber = dr["gamenumber"].ToString(), 
     league = dr["league"].ToString(), 
     date= dr["date"].ToString(), 
    }); 
} 


string json = JsonConvert.SerializeObject(allGames); 

Answer 4

這可以通過使用Javascript串行輕鬆完成更多詳細信息，請點擊這裏http://www.aspdotnet-suresh.com/2013/05/c-convert-datatable-to-json-string-in-c.html