[英]Replace json array elements with elements of another array c#
我有兩個json字符串。
string days = "['Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday']";
string data= "[[0,0,0],[2,1,0],[0,2,0],[3,3,0],[0,6,0],[0,7,0],[5,8,0],[0,9,1],[6,10,3],[0,11,5],[0,12,4],[4,13,7],[0,14,1]]";
我想這樣轉換json數據。
對於所有數組,例如[0,0,0]
a)如果最后一個值為0,則從數據中刪除此數組
b)用天數組中的第一個值替換第一個值,例如.. [3,13,7]變為[“ Wednesday”,13,7]
我從這個開始。
JArray daysarr = JArray.Parse(days);
JArray myarr = JArray.Parse(data);
foreach (var myobj in myarr)
{
// what do I do here????
}
真誠的感謝您的幫助。
謝謝
那么這個解決方案呢:
var js = new JavaScriptSerializer();
string days = "['Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday']";
string data = "[[0,0,0],[2,1,0],[0,2,0],[3,3,0],[0,6,0],[0,7,0],[5,8,0],[0,9,1],[6,10,3],[0,11,5],[0,12,4],[4,13,7],[0,14,1]]";
var Days = js.Deserialize<List<string>>(days);
var Data = js.Deserialize<List<List<int>>>(data);
var answer = js.Serialize(Data.Where(x => x.Last() != 0).ToList().Select(x => {
var list = new List<object> { Days[x.First()] };
list.AddRange(x.Skip(1).Select(y => (object)y).ToList());
return list;
}).ToList());
string days = "['Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday']";
string data = "[[0,0,0],[2,1,0],[0,2,0],[3,3,0],[0,6,0],[0,7,0],[5,8,0],[0,9,1],[6,10,3],[0,11,5],[0,12,4],[4,13,7],[0,14,1]]";
JArray daysarr = JArray.Parse(days);
JArray myarr = JArray.Parse(data);
JArray result = new JArray();
foreach (var myobj in myarr)
{
if (myobj.Last.Value<int>() != 0)
{
var t = new object[3];
t[0] = daysarr[myobj.First.Value<int>()];
t[1] = myobj[1];
t[2] = myobj[2];
result.Add(t);
}
}
foreach
循環是只讀的(您不能修改正在迭代的集合,例如刪除項目等); 您可以使用需要一個可以存儲字符串和整數的新容器,例如for
循環,而是List<Tuple<object, int, int>>
。
您還需要一個if
語句:
JArray daysarr = JArray.Parse(days);
JArray myarr = JArray.Parse(data);
var result = new List<Tuple<object, int, int>>();
foreach(myobj in myarr)
{
if(myobj[2] != 0)
{
var newValue = new Tuple<object, int, int>(daysarr[myobj[0]], myobj[1], myobj[2]);
result.Add(newValue);
}
}
您可以在下面的代碼中嘗試一下嗎:
string days = "['Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday']";
string data = "[[0,0,0],[2,1,0],[0,2,0],[3,3,0],[0,6,0],[0,7,0],[5,8,0],[0,9,1],[6,10,3],[0,11,5],[0,12,4],[4,13,7],[0,14,1]]";
JArray daysarr = JArray.Parse(days);
JArray myarr = JArray.Parse(data);
// a) If the last value is 0 remove this array from data
// b) Replace the first value with the first value in days array eg ..[3,13,7] becomes ["Wednesday",13,7]
// This result array we used for storing all valid data which follow the two rules as define above comment.
JArray result = new JArray();
foreach (var myobj in myarr)
{
if (myobj.Count() == 3)
{
var firstValue = Convert.ToInt32(myobj[0]);
var secondValue = Convert.ToInt32(myobj[1]);
var thirdValue = Convert.ToInt32(myobj[2]);
// Here we check last value of current array
if (thirdValue != 0)
{
string day = Convert.ToString(daysarr[firstValue]);
myobj[0] = day;
result.Add(myobj);
}
}
}
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