We Keep Coding

selecting the first 2 FIELDS in a JSON OBJECT

I have some JSON that looks like this:
{
"innerObj1": {
"1. Information": "unimportant"
},
"innerObj2": {
"2017-09-19 16:00:00": {
"number1": "75.4500"
},
"2017-09-19 15:55:00": {
"number2": "75.4200"
}
}
}
Not sure why innerObj2 is not returned as an array (this is from an api) but I have to get number1 and number2 returned as an array of strings. Note that 2017-09-19 16:00:00 and 2017-09-19 15:55:00 are subject to change, so I can't hardcode the selection of those objects in C#. I was thinking of possibly using LINQ, but I'm not sure how. I've really only used them with JSON arrays.

Assuming you are using Json.Net, you can get the values of the innermost properties into an array like this, without needing to know the names of them:
JObject obj = JObject.Parse(json);
string[] numbers = ((JObject)obj["innerObj2"]).Properties()
.SelectMany(jp => ((JObject)jp.Value).Properties())
.Select(jp => (string)jp.Value)
.ToArray();
Fiddle: https://dotnetfiddle.net/5sLy6M
Or, a simpler alternative which does the same thing using SelectTokens with a JSONPath wildcard expression:
string[] numbers = obj.SelectTokens("innerObj2.*.*")
.Select(jt => (string)jt)
.ToArray();
Fiddle: https://dotnetfiddle.net/CyRQ9T

Getting the values from this specific JSON

I'm trying to get all of the "last" values from this JSON here:
{"btc":{
"usd": {
"bitfinex": {
"last": "1191.60",
"volume": "1.99324e+7"
},
"bitstamp": {
"last": "1193.06",
"volume": "8.73693e+6"
},
"btce": {
"last": "1174.27",
"volume": "6.03521e+6"
}
}
}
But for some reason I can only access "btc" and "usd". I can't get anything out of it including the "last" values. Here is the code i'm using:
private string GetPrice()
{
WebClient wc = new WebClient();
var data = wc.DownloadString("http://preev.com/pulse/units:btc+usd/sources:bitfinex+bitstamp+btce");
JObject o = JObject.Parse(data);
string response = o["btc"].ToString();
return response;
}
If I change it to:
o["last"].ToString();
It just doesn't return anything. Can someone please provide me with a solution? I also tried making a key/value dict out of it and looping over each pair. Did not work.

The JObject structure is similar to a class with properties, so the first-level indexer ["btc"] returns another object that you have to query for its own properties ["usd"]
You can also opt for using JObject.SelectToken, generally not a bad idea. Other answers have shown how to chain the indexers but that's hard to read and maintain. Instead you can do:
jObj.SelectToken("btc[0].usd[0].bitstamp[0].last").ToString();
Further you can use the power of this syntax for other queries:
// a list o all the 'last' values
jObj.SelectTokens("btc.usd.*.last").Select(t=>t.ToString()).ToList();
Another advantage, if you're building a more complex system, is that you could put the queries in a config file or attributes etc to make them more manageable or deploy logic changes without rebuilding.
Yet another approach would be to build your own class structure and deserialize your json into it, so you have strongly typed values (double instead of string for the values for example)
public class btc {
public usd usd {get;set;}
}
public class usd....
var btcLoaded = JsonConvert.DeserializeObject<btc>(jsonString);
var lastBitstamp = btc.usd.bitstamp.last;

Use: o["btc"]["usd"]["bitfinex"]["last"].ToString() to get the 'last' value of 'bitfinex'.

After parsing the JSON whenever you index the o variable you are indexing from the root of the JSON. In order to access nested properties like 'last' you will need to index into the next level of the JSON as such:
var bitfinex = o["btc"]["usd"]["bitfinex"]["last"].ToString();
var bitstamp = o["btc"]["usd"]["bitstamp"]["last"].ToString();
var btce = o["btc"]["usd"]["btce"]["last"].ToString();
To reduce the repetition you could iterate over the properties under the btc.usd field.

if u want to all last values use this..
decimal[] lastValues = obj.SelectTokens("$..last").ToArray()
.Select(a => a.Parent.ToObject<decimal>()).ToArray();
if u want to dictionary, use this..
var dictionary = obj["btc"]["usd"].Select(a =>
new
{
Key = ((JProperty)a).Name,
Value = a.First["last"].ToObject<decimal>()
})
.ToDictionary(a => a.Key, a => a.Value);

Sort List by date values

I have the following list -
List<string> finalMessageContent
where
finalMessageContent[0] = "<div class="mHr" id="mFID">
<div id="postedDate">11/12/2015 11:12:16</div>
</div>" // etc etc
I am trying to sort the list by a particular value located in the entires - postedDate tag.
Firstly I have create an new object and then serialized it to make the html elements able to be parsed -
string[][] newfinalMessageContent = finalMessageContent.Select(x => new string[] { x }).ToArray();
string json = JsonConvert.SerializeObject(newfinalMessageContent);
JArray markerData = JArray.Parse(json);
And then used Linq to try and sort using OrderByDescending -
var items = markerData.OrderByDescending(x => x["postedDate"].ToString()).ToList();
However this is failing when trying to parse the entry with -
Accessed JArray values with invalid key value: "postedDate". Array position index expected.
Perhaps linq is not the way to go here however it seemed like the most optimised, where am I going wrong?

First, i would not use string methods, regex or a JSON-parser to parse HTML. I would use HtmlAgilityPack. Then you could provide such a method:
private static DateTime? ExtractPostedDate(string inputHtml, string controlID = "postedDate")
{
var doc = new HtmlAgilityPack.HtmlDocument();
doc.LoadHtml(inputHtml);
HtmlNode div = doc.GetElementbyId(controlID);
DateTime? result = null;
DateTime value;
if (div != null && DateTime.TryParse(div.InnerText.Trim(), DateTimeFormatInfo.InvariantInfo, DateTimeStyles.None, out value))
result = value;
return result;
}
and following LINQ query:
finalMessageContent = finalMessageContent
.Select(s => new { String = s, Date = ExtractPostedDate(s) })
.Where(x => x.Date.HasValue)
.OrderByDescending(x => x.Date.Value)
.Select(x => x.String)
.ToList();

Don't know if I get your question right.
But did you know that you can parse HTML with XPath?
foreach (var row in doc.DocumentNode.SelectNodes("//div[#id="postedDate"]"))
{
Console.WriteLine(row.InnerText);
}
this is just an example from the top of my head you might have to double-check the XPath query depending on your document. You can also consider converting it to array or parsing the date and do other transformations with it.
Like I said this is just from the top of my head. Or if the html is not so compley consider to extract the dates with an RegEx but this would be a topic for another question.
HTH

Json Serializer serializes JSON typed strings. Example here to json
To parse HTML I suggest using HtmlAgility https://htmlagilitypack.codeplex.com/
Like this:
HtmlAgilityPack.HtmlDocument htmlparsed = new HtmlAgilityPack.HtmlDocument();
htmlParsed.LoadHtml(finalMessageContent[0]);
List<HtmlNode> OrderedDivs = htmlParsed.DocumentNode.Descendants("div").
Where(a => a.Attributes.Any(af => af.Value == "postedDate")).
OrderByDescending(d => DateTime.Parse(d.InnerText)); //unsafe parsing

Check whether a string is in a list at any order in C#

If We have a list of strings like the following code:
List<string> XAll = new List<string>();
XAll.Add("#10#20");
XAll.Add("#20#30#40");
string S = "#30#20";//<- this is same as #20#30 also same as "#20#30#40" means S is exist in that list
//check un-ordered string S= #30#20
// if it is contained at any order like #30#20 or even #20#30 ..... then return true :it is exist
if (XAll.Contains(S))
{
Console.WriteLine("Your String is exist");
}
I would prefer to use Linq to check that S in this regard is exist, no matter how the order is in the list, but it contains both (#30) and (#20) [at least] together in that list XAll.
I am using
var c = item2.Intersect(item1);
if (c.Count() == item1.Length)
{
return true;
}

You should represent your data in a more meaningful way. Don't rely on strings.
For example I would suggest creating a type to represent a set of these numbers and write some code to populate it.
But there are already set types such as HashSet which is possibly a good match with built in functions for testing for sub sets.
This should get you started:
var input = "#20#30#40";
var hashSetOfNumbers = new HashSet<int>(input
.Split(new []{'#'}, StringSplitOptions.RemoveEmptyEntries)
.Select(s=>int.Parse(s)));

This works for me:
Func<string, string[]> split =
x => x.Split(new [] { '#' }, StringSplitOptions.RemoveEmptyEntries);
if (XAll.Any(x => split(x).Intersect(split(S)).Count() == split(S).Count()))
{
Console.WriteLine("Your String is exist");
}
Now, depending on you you want to handle duplicates, this might even be a better solution:
Func<string, HashSet<string>> split =
x => new HashSet<string>(x.Split(
new [] { '#' },
StringSplitOptions.RemoveEmptyEntries));
if (XAll.Any(x => split(S).IsSubsetOf(split(x))))
{
Console.WriteLine("Your String is exist");
}
This second approach uses pure set theory so it strips duplicates.

C# reading variables into static string from text file

I have seen several posts giving examples of how to read from text files, and examples on how to make a string 'public' (static or const), but I haven't been able to combine the two inside a 'function' in a way that is making sense to me.
I have a text file called 'MyConfig.txt'.
In that, I have 2 lines.
MyPathOne=C:\TestOne
MyPathTwo=C:\TestTwo
I want to be able to read that file when I start the form, making both MyPathOne and MyPathTwo accessible from anywhere inside the form, using something like this :
ReadConfig("MyConfig.txt");
the way I am trying to do that now, which is not working, is this :
public voice ReadConfig(string txtFile)
{
using (StreamReader sr = new StreamResder(txtFile))
{
string line;
while ((line = sr.ReadLine()) !=null)
{
var dict = File.ReadAllLines(txtFile)
.Select(l => l.Split(new[] { '=' }))
.ToDictionary( s => s[0].Trim(), s => s[1].Trim());
}
public const string MyPath1 = dic["MyPathOne"];
public const string MyPath2 = dic["MyPathTwo"];
}
}
The txt file will probably never grow over 5 or 6 lines, and I am not stuck on using StreamReader or dictionary.
As long as I can access the path variables by name from anywhere, and it doesn't add like 400 lines of code or something , then I am OK with doing whatever would be best, safest, fastest, easiest.
I have read many posts where people say the data should stored in XML, but I figure that part really doesn't matter so much because reading the file and getting the variables part would be almost the same either way. That aside, I would rather be able to use a plain txt file that somebody (end user) could edit without having to understand XML. (which means of course lots of checks for blank lines, does the path exist, etc...I am OK with doing that part, just wanna get this part working first).
I have read about different ways using ReadAllLines into an array, and some say to create a new separate 'class' file (which I don't really understand yet..but working on it). Mainly I want to find a 'stable' way to do this.
(project is using .Net4 and Linq by the way)
Thanks!!

The code you've provided doesn't even compile. Instead, you could try this:
public string MyPath1;
public string MyPath2;
public void ReadConfig(string txtFile)
{
using (StreamReader sr = new StreamReader(txtFile))
{
// Declare the dictionary outside the loop:
var dict = new Dictionary<string, string>();
// (This loop reads every line until EOF or the first blank line.)
string line;
while (!string.IsNullOrEmpty((line = sr.ReadLine())))
{
// Split each line around '=':
var tmp = line.Split(new[] { '=' },
StringSplitOptions.RemoveEmptyEntries);
// Add the key-value pair to the dictionary:
dict[tmp[0]] = dict[tmp[1]];
}
// Assign the values that you need:
MyPath1 = dict["MyPathOne"];
MyPath2 = dict["MyPathTwo"];
}
}
To take into account:
You can't declare public fields into methods.
You can't initialize const fields at run-time. Instead you provide a constant value for them at compilation time.

Got it. Thanks!
public static string Path1;
public static string Path2;
public static string Path3;
public void ReadConfig(string txtFile)
{
using (StreamReader sr = new StreamReader(txtFile))
{
var dict = new Dictionary<string, string>();
string line;
while (!string.IsNullOrEmpty((line = sr.ReadLine())))
{
dict = File.ReadAllLines(txtFile)
.Select(l => l.Split(new[] { '=' }))
.ToDictionary( s => s[0].Trim(), s => s[1].Trim());
}
Path1 = dict["PathOne"];
Path2 = dict["PathTwo"];
Path3 = Path1 + #"\Test";
}
}

You need to define the variables outside the function to make them accessible to other functions.
public string MyPath1; // (Put these at the top of the class.)
public string MyPath2;
public voice ReadConfig(string txtFile)
{
var dict = File.ReadAllLines(txtFile)
.Select(l => l.Split(new[] { '=' }))
.ToDictionary( s => s[0].Trim(), s => s[1].Trim()); // read the entire file into a dictionary.
MyPath1 = dict["MyPathOne"];
MyPath2 = dict["MyPathTwo"];
}

This question is similar to Get parameters out of text file
(I put an answer there. I "can't" paste it here.)
(Unsure whether I should "flag" this question as duplicate. "Flagging" "closes".)
(Do duplicate questions ever get consolidated? Each can have virtues in the wording of the [often lame] question or the [underreaching and overreaching] answers. A consolidated version could have the best of all, but consolidation is rarely trivial.)