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I want to take only particular value from returned JSON result

I want to take message value, which is under message array and parameter name equal to documentId.(which is bold in bellow code)
bellow code which i have tried but not working as described above.dynamic obj = JsonConvert.DeserializeObject(JsonDATA);
var recid = obj.messages.message;
JSON Data
{
"message": "Success",
"messages": [
{
"parameter": "documentId",
"message": "8111ffb4-dddc-4d94-b050-bf8fa050181f"
},
{
"parameter": "refNo",
"message": "INNT19/75254854"
}
]
}
Please Help me to take the particular value only in C#.

You need to get the message at the correct index in the messages-array:
dynamic obj = JsonConvert.DeserializeObject(JsonDATA);
var recid = obj.messages[0].message;

As messages is an array in your JSON, If you need to read any property of perticular element of an array then you need to use index. Something like
var recid = obj.messages[0].message;

Extract stream to JSON in JS

Help figuring out how to convert following string to JSON in javascript . I require date(20181218-20181228) and its corresponding price(formattedPrice=$469). Thanks!
20181218-20181228={currencyCode=USD, totalPrice=469.4, formattedPrice=$469, cheapest=false},
20181218-20181226={currencyCode=USD, totalPrice=469.4, formattedPrice=$469, cheapest=false},
20181218-20181227={currencyCode=USD, totalPrice=451.4, formattedPrice=$451, cheapest=false},
Tried adding quotes and : to the text but facing error while parsing because the key(20181218-20181228) isn't specific

You can use .split() and .reduce() like this;
function parseWeirdString(str) {
return str.split(/},?/g).reduce((obj, row) => {
const rowParts = row.split(/\={/);
if (rowParts.length > 1) {
obj[rowParts[0].trim()] = rowParts[1].split(/,/g).reduce((innerObj, keyValue) => {
const keyValueParts = keyValue.split(/=/);
innerObj[keyValueParts[0].trim()] = keyValueParts[1].trim();
return innerObj;
}, {});
}
return obj;
}, {});
}
Should return an object like this:
{
"20181218-20181228": {
"currencyCode": "USD",
"totalPrice": "469.4",
"formattedPrice": "$469",
"cheapest": "false"
},
"20181218-20181226": {
"currencyCode": "USD",
"totalPrice": "469.4",
"formattedPrice": "$469",
"cheapest": "false"
},
"20181218-20181227": {
"currencyCode": "USD",
"totalPrice": "451.4",
"formattedPrice": "$451",
"cheapest": "false"
}
}
Note that all values are strings including "true" and "false". and if the values have commas etc then this will fail.

Replace all = with : using replace all, Remove "," in the end, Put { and } in start and end. All the non-number and non-boolean values should be put in "". You can write a regex for that. Let me know if you need help in that.
objstr = `{"20181218-20181228":{"currencyCode":"USD", "totalPrice":469.4, "formattedPrice":"$469", "cheapest":false},
"20181218-20181226":{"currencyCode":"USD", "totalPrice":469.4, "formattedPrice":"$469", "cheapest":false}}`;
//replace, remove last , ,,, Put {} in start and end ,,,,
obj = JSON.parse(objstr);
console.log(obj);
You can use below Regex to parse this object. I have created a custom regex for your need which you can customize. There are some other options like eval but are not secure. btw since you are new so informing you that you can upvote(like) answers helping you :)
objstr22 = `{20181218-20181228={currencyCode=USD, totalPrice=469.4, formattedPrice=$469, cheapest=false},
20181218-20181226={currencyCode=USD, totalPrice=469.4, formattedPrice=$469, cheapest=false},
20181218-20181227={currencyCode=USD, totalPrice=451.4, formattedPrice=$451, cheapest=false}}`;
objstr22 = objstr22
.replace(/ /g, "")
.replace(/([\-\w\d]+)=/g, '"$1"=')
.replace(/=([\w\d\.\$]+)/g, ':"$1"')
.replace(/=([[{])/g, ":$1");
console.log(objstr22);
let obj22 = JSON.parse(objstr22);
for (o of Object.keys(obj22)) {
console.log(o, obj22[o]);
}

How to remove character from left of the string until first : if found?

I have JSON String as the one below which is returned from the previous function. It is a string, not object.
{
"qs1": {
"mistake": [{
"id": 1,
"name": "Subject-Verb Agreement Errors."
}, {
"id": 1,
"name": "Sentence Fragments."
}, {
"id": 1,
"name": "Missing Comma After Introductory Element."
}]
}
}
I converted it into an object by using Jquery.parseJSON() now I want to use length to find a number of mistakes.
Problem:
the first key qs1 of the returned JSON can be different like qs2,qs3 & so on. I don't want to use a loop to get the key name qs1,qs2 because it will take a lot of time in only getting a key name and if I have a lot of questions. Also, I don't know the number of questions.
Is there is any way to check qs1.mistake.length>0 without knowing the key name(qs1).
Below is my function:
function SelectiMstake(value) {
alert(value);
var value2 = jQuery.parseJSON(value);
var NewHtml="";
if(value2.mistake.length>0) {
alert("mistake found");
//for(var mistakei = 0; mistakei < value2.mistake.length; mistakei++) {
// NewHtml+= "<input type='check' value='"+ value2.mistake[mistakei] +"'>"+ value2.mistake[mistakei] +"<br>";
// }
//$("#DisplayMistakes").html(NewHtml);
} else {
alert("No mistakes found in the following Question");
}
}
if there is no way I want to stick with my question part when I get JSON string then I want to remove {"qs1": from the start of the string and } from the last. Don't use a character to remove from the start otherwise {"qs12": this will give the wrong result.

Use Object.values(), and just select the first element, or loop through the values (Which is now an array), if you want to check each qs*:
var json = '{"qs1":{"mistake":[{"id":1,"name":"Subject-Verb Agreement Errors."},{"id":1,"name":"Sentence Fragments."},{"id":1,"name":"Missing Comma After Introductory Element."}]}}';
var parsed = JSON.parse(json);
var vals = Object.values(parsed);
console.log(vals[0]);
console.log(vals[0].mistake.length); // 3

How to extract the value of an object inside an incomplete JSON array in Javascript?

I have a node app from which I get some data. I have gone through other questions asked on SO..but Im unable to figure this out. I need to access the value of result . The code below shows the exact response I get from server. None of the methods described in other answers like JSON.parse() etc seem to work.
[{
query: {
"parameter1": "12",
"parameter2": "13",
"parameter3": 25
}
result: 6.58443
}]
EDIT : As mentioned in the comments below, unfortunately I cant fix this on the server side(Comes from an external source). I have to deal with this broken JSON on my end and extract the value of result.
EDIT 2 : Yes, there are multiple arrays like this. The content and comma part doesnt change. They are listed one after the other.

Despite the fact you can't receive that data though any library function that expects JSON like jQuery $.ajax() with dataType='json' option (you should use dataType="text" in this case to avoid premature error being triggered I mean).
...you obviously need to fix JSON syntax before parsing it (as I understood you already know).
If it is what you are asking for, your best bet is a regular expression search and replace.
If you know you won't get things such as '{bracket: "}"}' it is pretty simple:
Example:
var wrong = `
[{
"query": {
"parameter1": "12",
"parameter2": "13",
"parameter3": 25
}
"result": 6.58443
}]
`;
var good = wrong.replace(/}(?!\s*[,}\]])/g, '},');
var json = JSON.parse(good);
console.log(json);
This is the simplest example that fixes the input you provided.
Even though it does not fix the same problem after an end of array (']') and, most importantly, if it were fixed it (or simply the string ended with '}' instead of ']' it would added an extra ',' at the end messing up things again.
A more polite approach solving beferementioned issues is to replace the var good = ... row in previous code with this one:
var good = wrong.replace(/(}|])(?!\s*[,}\]])/g, '$1,')
.replace(/,\s*$/, '')
;
Now, you have a valid json object so accessing any property in it is pretty obvious. For example, json[0].result is what you asked for.
On the other hand, if you can have brackets inside literal strings, it will be much more difficult (even not impossible). But I figure out it would hardly be the case...

what you can do is to encapsulate your result with back-ticks to have a (valid) string literal, then get result with any method you want, for example a matching regex :
var arr = `[{
"query": {
"parameter1": "12",
"parameter2": "13",
"parameter3": 25
}
"result": 6.58443
}]`;
var match = arr.match(/("result": )(\d*.\d*)/);
console.log(match[2]);

The suggestions provided above..all point to a hacky way of solving this. The only way to solve this issue was with the help of good old Regex expressions. To my surprise..even though there are lots of libraries to handle JSON parsing etc, to solve edge cases(Common when dealing with small clients or unreliable data source), there is no library which can handle this scenario.
#Bitifet's answer is what solves this problem..with regex.

Purely for illustrative purposes, the below code "rewrites" JSON that is missing commas into JSON that has commas in the appropriate places. The advantage of using this over a replace or a regular expression is that this code guarantees that string literals are handled correctly:
const LEX_EXPR = (
'('
+ '"(?:\\\\(?:["\\\\/bfnrt]|u[a-fA-F0-9]{4})|[^"])*"|'
+ '-?\\d+(?:\\.\\d+)?(?:[eE][+-]?\\d+)?|'
+ '(?:true|false|null)'
+ ')|'
+ '([{\\[])|'
+ '([}\\]])|'
+ '([:,])|'
+ '(\\s+)|'
+ '(.)'
)
function lex(string) {
let tokens = []
let expr = new RegExp(LEX_EXPR, 'mguy')
let match = expr.exec(string)
while(match !== null) {
let [
value,
atom,
begin, end, sep,
whitespace,
junk
] = match
let type
if (atom != null) {
type = "atom"
} else if (begin != null) {
type = "begin"
} else if (end != null) {
type = "end"
} else if (sep != null) {
type = "sep"
} else if (whitespace != null) {
type = "whitespace"
} else {
// junk. ignore or raise exception
throw `Invalid character: ${junk}`
}
tokens.push({ type, value })
match = expr.exec(string)
}
return tokens
}
function shouldInsertComma(prev, cur) {
if (!prev || !cur) {
return false
}
if (prev.type == "begin" || prev.type == "sep") {
return false
}
return cur.type == "begin" || cur.type == "atom"
}
function rewrite(tokens) {
let out = []
let prevNonWhitespace = null
for (let i = 0; i < tokens.length; i++) {
let cur = tokens[i]
if (cur.type !== "whitespace") {
if (shouldInsertComma(prevNonWhitespace, cur)) {
out.push({ type: "sep", value: "," })
}
prevNonWhitespace = cur
}
out.push(cur)
}
return out
}
function joinTokens(tokens) {
return tokens.map(({ value }) => value).join('')
}
const invalid = `
{
"foo": {
"bat": "bing}"
"boo": "bug"
}
"result": "yes"
}
`
const rewritten = joinTokens(rewrite(lex(invalid)))
console.log(JSON.parse(rewritten)) // { foo: { bat: 'bing}', boo: 'bug' }, result: 'yes' }

Accessing JSON nested via key with no value using Javascript / jQuery

I'm trying to return the values of JSON objects which are nested within a complex array of objects. Unfortunately I've not been able to do it easily as the structure of the JSON seems unusual; for example:
var cartContents = {
"contents":
{
"ed2be4abf6cc927dd670b567efd42fc3":
{
"id": "1288785070733722605",
"quantity":2,
"limit":10,
"offset":0,
"order":null,
"created_at":"2016-07-06 12:18:10",
"updated_at":"2016-07-06 12:18:34",
"sku":"006",
"title":"Fishing Rod",
"slug":"fishing-rod-lara-fluorescent-print",
"sale_price":0,
"status":{
"value":"Draft",
"data": {
"key":"0",
"value":"Draft"
}
},
"category":
{
"value":"Bottom",
"data":
{
"1228355758422329063":
{
"id":"1238352758122309063",
"order":null,
"created_at":"2016-07-06 11:23:54",
"updated_at":"2016-07-06 11:38:23",
"parent":
{
"value":"All Sports",
"data":
{
"id":"2288364532150634121",
"order":null,
"created_at":"2016-07-06 11:37:25"...
}
}
}
}
}
}
}
}
The following code produces the correct result ("Fishing Rod"):
var x = cartContents.contents;
console.log(x.ed2be4abf6cc927dd670b567efd42fc3.title);
However the whole point is that the 32 character string ('ed2be4abf6cc927dd670b567efd42fc3') represents one of many products, each with a random 32 bit string and therefore they can't be individually coded into the JS.
I've tried a very great deal of different ways. The latest is the following code (where 'carts' is an array of unique 32 character strings:
var x = cartContents.contents;
$.each(carts, function() {
console.log(x.this.title);
});
The result is "jQuery.Deferred exception: Cannot read property 'title' of undefined TypeError: Cannot read property 'title' of undefined".
Would greatly appreciate help accessing the following keys and their values:
"title":"Fishing Rod"
"id":"1238352758122309063"
"created_at":"2016-07-06 11:37:25"
Also worth mentioning that I can't touch the server, therefore I can't change the data structure at all.
Many thanks in advance.