C＃Newtonsoft JSON更新Where

我想更新一個類似where select的JToken值。C＃Newtonsoft JSON更新Where

JSON: 
[ 
    { 
    "Uid": "7775", 
    "MessageID": "<[email protected]>", 
    "Mailbox": "INBOX", 
    "Subject": "asdfdsf", 
    "Seen": true, 
    "Date": "31.08.2016 17:24:42", 
    "Name": "asdasdasd", 
    "Attachments": "0" 
    }, 
    { 
    "Uid": "7776", 
    "MessageID": "<[email protected]>", 
    "Mailbox": "INBOX", 
    "Subject": "sdfdsf", 
    "Seen": true, 
    "Date": "31.08.2016 17:35:05", 
    "Name": "asdfasdf", 
    "Attachments": "0" 
    }, 
    { 
    "Uid": "7777", 
    "MessageID": "<[email protected]>", 
    "Mailbox": "INBOX", 
    "Subject": "xxxs", 
    "Seen": true, 
    "Date": "31.08.2016 17:47:24", 
    "Name": "xxxssw", 
    "Attachments": "0" 
    } 
]

我試過這樣的東西，但我找不到任何更新的功能：[！僞碼！]

JToken storage = JToken.Parse(System.IO.File.ReadAllText("tmp\\mail\\index.txt")); 

storage = storage.FirstOrDefault(o => (string)o["seen"] == "false").Update("seen", "true"); // Update(Field, NewValue) 

storage.WriteToFile(...)

來源

2016-09-01 user3236231

也許你可以deserialise的JSON變成某種對象列表，它實現IQueriable。然後，您可以使用LINQ和重新列入JSON的reserialise來剔除列表或結果。 – AntDC

查看http://www.newtonsoft.com/json/help/html/ModifyJson.htm – dbc

JArray array = JArray.Parse(yourJson); 
JObject jo = (JObject)array.FirstOrDefault(token => !(bool)token["Seen"]); 
// you could make an extension method for the remove/add sequence 
jo.Property("Seen").Remove(); 
jo.Property("Subject").AddAfterSelf(new JProperty("Seen", true)); 
// write back to file array.ToString()

來源

2016-09-01 10:37:39

C＃Newtonsoft JSON更新Where

回答

相關問題