Parsing JToken to get Key Value pair - c#

I'm getting a feed json from YouTube. I can get the "entry" element and the with:
JObject json = JObject.Parse(response);
foreach (var entry in json["feed"]["entry"]) {
var title = entry["title"];
}
But how do I get the Value for 'title'? entry["title].ToString() gives me both key and value as a string...


Please try to include the JSON you want to parse in your question.
That being said, going from the feed shown here, which is linked to from the Developer's Guide: JSON / JavaScript, you should do:
foreach (var entry in json["feed"]["entry"])
{
var title = (string)entry.SelectToken("title.$t");
}

Related

How to get data from a nested json in c#

{"data": {"day2": {"mId": "9ilrMdX15S", "votes": "2,893"},"day3": {"mId": "9ilert415S","votes": "2,343"}}}
How can i retrieve the data from a json data as such (i.e the data in "day2", or "day3") i followed the answers here > Appending json data to listview c# by Brain Rogers but the answer only work for json object not for nested json.

Here's an example of how to navigate it:
foreach (JProperty day in JObject.Parse(json)["data"])
{
string name = day.Name;
string id = day.Value.Value<string>("mId");
string votes = day.Value.Value<string>("votes");
}

Thanks for all the response, i was able to solve the task using the SimpleJSON library by Bunny83 GitHub - Bunny83/SimpleJSON: A simple JSON parser in C#
JSONNode data = JSON.Parse(//jsonData or Url//);
string mId = data["data"]["day2"]["mId"].Value;
string votes = data["data"]["day2"]["votes"].Value;

How to parse JSON with Newtonsoft?

I created an ASP.NET Application, where I have to parse a csv file with a json structure.
The csv file itself is structured like:
{"Instance":"abc","Date":"2019-06-03T00:00:02.056Z","Identification":"someFunction","Type":"DurationInMs","Value":"5","iserror":"False""}
I get the jsonCsvData as a string and tried to parse it. Then I want to save some of the elements of this json object into a db.
public IActionResult ReadJsonCsvData(string jsonCsvData)
{
Console.WriteLine("ReadJsonCsvData");
ChartData chartData = new ChartData();
var lines = jsonCsvData.Split("\n");
foreach (var line in lines)
{
var values = JObject.Parse(line);
var first = string.Concat(values["Instance"]); //Output for first: ""
}
}
The problem now is, that the variable first is an empty string. The result should be (like in the json structure example above) "abc".
Thank you in advance!

I don't know if it will help but here is my solution (remove one of " at the end of your Json).
I use the "Jobject" to parse Json as I want. Import this two reference.
using Newtonsoft.Json.Linq;
using Newtonsoft;
Then you have to create your JObject :
JObject o = JObject.Parse(myJsonString);
Then to retrieve specifics data, you just have to search in your object just like you do with a dictionary with key :
instanceFromJson = o["Instance"].ToString;
dateFromJson = o["Date"].ToString;
If you have a table in your "instance" json object you can retrieve all data from this list just like that :
foreach (var item in o["Instance"]["tabFromInstanceObject"])
{
MyList.Add(item);
}

Unable to parse JSON file format

I have the following JSON in a text file which I am trying to parse.
{
"0":[68],
"1":[154,78,61],
"2":[89,132,146],
"3":[],
"4":[77,132,146],
"5":[32,132,50],
"6":[],
"7":[114,118,54,44,72,136,156,134,129,82,43,34,51,93,142,67,47,153,160,73,39,149,107,94,145,29,115,53,83,1,35,56,123,66,90,121,155],
"8":[89,146],
"9":[89,146],
"10":[100,135],
"11":[],
"12":[],
"13",[111,131],
"14":[77,124],
"15":[89,146],
"16":[163,126,122],
"17":[100,126,135],
"18":[32,50],
"19":[163,126,122]
}
The code I have is
var map = new List<Dictionary<int, List<int>>>();
using (var r = new StreamReader(#"C:\Development\phase2\dependencymap.json"))
{
var json = r.ReadToEnd();
map = JsonConvert.DeserializeObject<List<Dictionary<int, List<int>>>>(json);
}
But it doesn't seem to like the format. What am I doing wrong?

The JSON is malformed. Check the following line
"13" , [111,131],
and change it to:
"13" : [111,131],

Try map = JsonConvert.DeserializeObject<List<Dictionary<String, List<int>>>>(json);
Your keys are String, not int.

Parsing JSON result from web link

I'm trying to string data from this JSON Link Click on Link to view
Using JSON.NET. Im able to Deserialize and string the entire thing. But what I need is just values of below
"Warranty":[
{
"EndDate": "ValueIWant",
"ServiceLevelDescription": "ValueIWant"
},
There should be 4 warranty entries from which I need EndDate & ServiceLevelDescription for all and list it in a Multi Line Text box.
Edited: Final Working code
string Serial = "G88NJX1";
WebClient client = new WebClient();
Stream stream = client.OpenRead("https://api.dell.com/support/v2/assetinfo/warranty/tags.json?svctags=" + Serial + "&apikey=1adecee8a60444738f280aad1cd87d0e");
StreamReader reader = new StreamReader(stream);
var jObject = JObject.Parse(reader.ReadLine());
foreach (var o in jObject["GetAssetWarrantyResponse"]["GetAssetWarrantyResult"]["Response"]["DellAsset"]["Warranties"]["Warranty"])
{
Console.WriteLine("Warranty end date: {0}", (string)o["EndDate"]);
Console.WriteLine("Warranty service level description: {0}", (string)o["ServiceLevelDescription"]);
}
Console.ReadLine();
stream.Close();

You can use json.net to parse the json only, rather than deserialize it, then you can query the parsed data, using linq or otherwise. Details here.
This code snippet works in linqpad to output the two values you want from your example json.
var json = #"{'Warranty':[{'EndDate':'ValueIWant','ServiceLevelDescription':'ValueIWant'}]}";
var j = JObject.Parse(json);
foreach(var o in j["Warranty"])
{
Console.WriteLine("Warranty end date: {0}", (string)o["EndDate"]);
Console.WriteLine("Warranty service level description: {0}", (string)o["ServiceLevelDescription"]);
}

extract variables and values from http post / string c#

I am trying to read in POST data to an ASPX (c#) page. I have got the post data now inside a string. I am now wondering if this is the best way to use it. Using the code here (http://stackoverflow.com/questions/10386534/using-request-getbufferlessinputstream-correctly-for-post-data-c-sharp) I have the following string
<callback variable1="foo1" variable2="foo2" variable3="foo3" />
As this is now in a string, I am splitting based on a space.
string[] pairs = theResponse.Split(' ');
Dictionary<string, string> results = new Dictionary<string, string>();
foreach (string pair in pairs)
{
string[] paramvalue = pair.Split('=');
results.Add(paramvalue[0], paramvalue[1]);
Debug.WriteLine(paramvalue[0].ToString());
}
The trouble comes when a value has a space in it. For example, variable3="foo 3" upsets the code.
Is there something better I should be doing to parse the incoming http post variables within the string??

You might want to treat it as XML directly:
// just use 'theResponse' here instead
var xml = "<callback variable1=\"foo1\" variable2=\"foo2\" variable3=\"foo3\" />";
// once inside an XElement you can get all the values
var ele = XElement.Parse(xml);
// an example of getting the attributes out
var values = ele.Attributes().Select(att => new { Name = att.Name, Value = att.Value });
// or print them
foreach (var attr in ele.Attributes())
{
Console.WriteLine("{0} - {1}", attr.Name, attr.Value);
}
Of course you can change that last line to whatever you want, the above is a rough example.

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