[英]Convert DataTable to JSON
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);
我的輸出看起來:
{
"Games": [{
"gamenumber": "123456",
"league": "Test League",
"date": "03.09.2016 15:00:00",
}]
}
我的問題是我不僅需要行0,還需要表的所有行。 我實際上想通過for循環解決問題,但是我總是遇到錯誤。 有誰知道我如何處理表格的剩余數據?
您需要遍歷數據表的行,因為實際上並不需要索引,所以可以使用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,您可以根據需要使用LINQ
:
var games = (from DataRow row in dt.Rows
select new Game() {
gamenumber = row["gamenumber"].ToString(),
league = row["league"].ToString(),
date = row["date"].ToString()
}).ToList();
假設dt
是DataTable
,則可以像下面這樣進行一個foreach
循環:
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()
});
}
您應該能夠遍歷數據表中的所有行,如下所示:
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);
使用Javascript序列化程序可以輕松完成此操作:
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);
}
如果您需要更多詳細信息,請查看此處http://www.aspdotnet-suresh.com/2013/05/c-convert-datatable-to-json-string-in-c.html
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