Develop Reference

How to properly access object's List<> value in C#?

I am trying to get the object value but I don't know how to do it. I'm new to C# and its giving me syntax error. I want to print it separately via the method "PrintSample" How can I just concatenate or append the whatData variable . Thank you.
PrintSample(getData, "name");
PrintSample(getData, "phone");
PrintSample(getData, "address");
//Reading the CSV file and put it in the object
string[] lines = File.ReadAllLines("sampleData.csv");
var list = new List<Sample>();
foreach (var line in lines)
{
var values = line.Split(',');
var sampleData = new Sample()
{
name = values[0],
phone = values[1],
address = values[2]
};
list.Add(sampleData);
}
public class Sample
{
public string name { get; set; }
public string phone { get; set; }
public string adress { get; set; }
}
//Method to call to print the Data
private static void PrintSample(Sample getData, string whatData)
{
//THis is where I'm having error, how can I just append the whatData to the x.?
Console.WriteLine( $"{getData. + whatData}");
}

In C# it's not possible to dynamically evaluate expression like
$"{getData. + whatData}"
As opposed to languages like JavaScript.
I'd suggest to use rather switch expression or Dictionary<string, string>
public void PrintData(Sample sample, string whatData)
{
var data = whatData switch
{
"name" => sample.name,
"phone" => sample.phone,
"address" => sample.address
_ => throw new ArgumentOutOfRangeException(nameof(whatData)),
};
Console.WriteLine(data);
}

I'm not sure what you are trying to achieve. Perhaps this will help you:
private static void PrintSample(Sample getData, string whatData)
{
var property = getData.GetType().GetProperty(whatData);
string value = (string)property?.GetValue(getData) ?? "";
Console.WriteLine($"{value}");
}

What PO really needs is
private static void PrintSamples(List<Sample> samples)
{
foreach (var sample in samples)
Console.WriteLine($"name : {sample.name} phone: {sample.phone} address: {sample.address} ");
}
and code
var list = new List<Sample>();
foreach (var line in lines)
{
......
}
PrintSamples(list);
it is radicolous to use
PrintSample(getData, "name");
instead of just
PrintSample(getData.name)

You can do this using reflection. However, it's known to be relatively slow.
public static void PrintSample(object getData, string whatData)
{
Console.WriteLine( $"{getData.GetType().GetProperty(whatData).GetValue(getData, null)}");
}

How to iterate through JObject Properties via Foreach/LINQ

I have an established JObject object. Trying to loop through it to acquire a Key/value based on anothers Key/value (example of json below with code currently stuck on)
For a tad more detail - looking to loop through "value", get the "KeyID" based on "MailState"
definitely feel like I am missing the step of filtering by MailState/ColName apparently - I have searched through threads a bunch but if someone knows of one that answered this that i was unable to find i will happily pull this down/reference it
// JSON DATA
{
"odata.metadata": "https://..com/odata/$metadata#JCJMCDXes",
"value": [
{
"KeyID": "10379",
"MailCity": "Chicago",
"MailState": "IL"
},
{
"KeyID": "9846",
"MailCity": "Chicago",
"MailState": "IL"
},
{
"KeyID": "2234",
"MailCity": "Madison",
"MailState": "WI"
}]
}
// Current code example
// class in play
public class datastorage
{
public string ID { get; set; }
public string Col { get; set; }
}
public class listData
{
public string ColName {get;set;}
}
// getVPData is a string response from a call to an API
getVPData.Replace(System.Environment.NewLine, "");
JObject jobj = (JObject)Newtonsoft.Json.JsonConvert.DeserializeObject(getVPData);
List<datastorage> data = new List<datastorage>();
// Loop
foreach(var r in listData) // has distinct State abeviations so only 1 occurence
{
foreach (var j in jobj) // This the right path?
{
//add KeyID into ID
data.add(new datastorage
{
ID = ,//add KeyID into ID
Col = r.ColName
});
}
}

You can use Newtonsoft.Json library to parse and loop to the items of value
here is a sample code:
dynamic json = JsonConvert.DeserializeObject(getVPData);
foreach (dynamic item in json["value"])
{
//you can access the fields inside value.
var KeyID = item["KeyID"];
var MailCity = item["MailCity"];
var MailState = item["MailState"];
//just for showing...
Console.WriteLine("KeyID:{0}, MailCity:{1}, MailState:{2}", KeyID, MailCity, MailState);
}
Let me know if the snippet works.

Straightforward ways are:
using System;
using System.Linq;
using Newtonsoft.Json;
using Newtonsoft.Json.Linq;
namespace ConsoleApp7
{
internal class Program
{
private static void Main(string[] args)
{
var mailStates = new[] {"IL", "WI"};
var jObject = (JObject) JsonConvert.DeserializeObject(json);
var values = (JArray) jObject["value"];
// 1st way
foreach (var mailState in mailStates)
{
var key = values
.Where(v => mailState == v.SelectToken("MailState").Value<string>())
.Select(v => v.Value<string>("KeyID"))
.FirstOrDefault();
Console.WriteLine($"1st case: {mailState} - {key}");
}
/* 2nd way based on JSONPath
* api: https://www.newtonsoft.com/json/help/html/QueryJsonSelectTokenJsonPath.htm
* dox: https://support.smartbear.com/alertsite/docs/monitors/api/endpoint/jsonpath.html
* tester: https://jsonpath.curiousconcept.com/
*/
foreach (var mailState in mailStates)
{
var key = values.SelectTokens($"$[?(#.MailState == '{mailState}')].KeyID")
.Select(v => v.ToString())
.FirstOrDefault();
Console.WriteLine($"2nd case: {mailState} - {key}");
}
Console.ReadKey();
}
private static string json = #"
{
""odata.metadata"": ""https://cdxapiclient.palmercg.com/odata/$metadata#JCJMCDXes"",
""value"": [
{
""KeyID"": ""10379"",
""MailCity"": ""Chicago"",
""MailState"": ""IL""
},
{
""KeyID"": ""9846"",
""MailCity"": ""Chicago"",
""MailState"": ""IL""
},
{
""KeyID"": ""2234"",
""MailCity"": ""Madison"",
""MailState"": ""WI""
}]
}";
}
}

NewtonSoft json parsing

Can somebody help me to parse the json and get the details.
Lets say i have Top2 input parameter as Police and i want to know the respective Top3 and in that Top3 array i need to check whether Test1Child value is there or not.
I am using newtonsoft json + c# and so far i can get till DeviceTypes using below code
var json = File.ReadAllText(jsonFile); // below json is stored in file jsonFile
var jObject = JObject.Parse(json);
JArray MappingArray =(JArray)jObject["Top1"];
string strTop1 = ObjZone.Top1.ToString();
string strTop2 = ObjZone.Top2.ToString();
var JToken = MappingArray.Where(obj => obj["Top2"].Value<string>() == strTop2).ToList();
//Json
{
"Top1": [
{
"Top2": "Test1",
"Top3": [
"Test1Child"
]
},
{
"Top2": "Test2",
"Top3": [
"Test2Child"
]
}
]
}

I'd use http://json2csharp.com/ (or any other json to c# parser) and then use C# objects (it's just easier for me)
This would look like that for this case:
namespace jsonTests
{
public class DeviceTypeWithResponseTypeMapper
{
public string DeviceType { get; set; }
public List<string> ResponseTypes { get; set; }
}
public class RootObject
{
public List<DeviceTypeWithResponseTypeMapper> DeviceTypeWithResponseTypeMapper { get; set; }
}
}
and the use it like that in code:
var rootob = Newtonsoft.Json.JsonConvert.DeserializeObject<RootObject>(str);
var thoseThatHaveNotUsed = rootob.DeviceTypeWithResponseTypeMapper.Where(dtwrtm =>
dtwrtm.ResponseTypes.Any(rt => rt == "NotUsed"));
foreach (var one in thoseThatHaveNotUsed)
{
Console.WriteLine(one.DeviceType);
}
this code lists all the Device types that have "NotUsed" among the responses.
version 2 (extending your code) would look like that, i believe:
static void Main(string[] args)
{
var json = str; // below json is stored in file jsonFile
var jObject = JObject.Parse(json);
JArray ZoneMappingArray = (JArray)jObject["DeviceTypeWithResponseTypeMapper"];
string strDeviceType = "Police";
string strResponseType = "NotUsed";
var JToken = ZoneMappingArray.Where(obj => obj["DeviceType"].Value<string>() == strDeviceType).ToList();
var isrespTypeThere = JToken[0].Last().Values().Any(x => x.Value<string>() == strResponseType);
Console.WriteLine($"Does {strDeviceType} have response type with value {strResponseType}? {yesorno(isrespTypeThere)}");
}
private static object yesorno(bool isrespTypeThere)
{
if (isrespTypeThere)
{
return "yes!";
}
else
{
return "no :(";
}
}
result:
and if you'd like to list all devices that have response type equal to wanted you can use this code:
var allWithResponseType = ZoneMappingArray.Where(jt => jt.Last().Values().Any(x => x.Value<string>() == strResponseType));
foreach (var item in allWithResponseType)
{
Console.WriteLine(item["DeviceType"].Value<string>());
}

Elastic Search to search for words that starts with phrase

I'm trying to create a search function for my website using Elastic Search and NEST. You can see my code below and I get results if I search for complete (and almost comlete) words.
Ie, if I search for "Buttermilk" or "Buttermil" I get a hit on my document containing the word "Buttermilk".
However, what I try to accomplish is if I search for "Butter", I should have a result with all three documents which have words that starts with "Butter". I thought this was solved by using FuzzyLikeThis?
Can anyone see what I'm doing wrong and point me in the right direction?
I created a console-app and the complete code you can see here:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Nest;
using Newtonsoft.Json;
namespace ElasticSearchTest
{
class Program
{
static void Main(string[] args)
{
var indexSettings = new IndexSettings();
indexSettings.Analysis.Analyzers["text-en"] = new SnowballAnalyzer { Language = "English" };
ElasticClient.CreateIndex("elastictesting", indexSettings);
var testItem1 = new TestItem {
Id = 1,
Name = "Buttermilk"
};
ElasticClient.Index(testItem1, "elastictesting", "TestItem", testItem1.Id);
var testItem2 = new TestItem {
Id = 2,
Name = "Buttercream"
};
ElasticClient.Index(testItem2, "elastictesting", "TestItem", testItem2.Id);
var testItem3 = new TestItem {
Id = 3,
Name = "Butternut"
};
ElasticClient.Index(testItem3, "elastictesting", "TestItem", testItem3.Id);
Console.WriteLine("Write search phrase:");
var searchPhrase = Console.ReadLine();
var searchResults = Search(searchPhrase);
Console.WriteLine("Number of search results: " + searchResults.Count());
foreach (var item in searchResults) {
Console.WriteLine(item.Name);
}
Console.WriteLine("Press any key to exit");
Console.ReadKey();
}
private static List<TestItem> Search(string searchPhrase)
{
var query = BuildQuery(searchPhrase);
var result = ElasticClient
.Search(query)
.Documents
.Select(d => d)
.Distinct()
.ToList();
return result;
}
public static ElasticClient ElasticClient
{
get
{
var localhost = new Uri("http://localhost:9200");
var setting = new ConnectionSettings(localhost);
setting.SetDefaultIndex("elastictesting");
return new ElasticClient(setting);
}
}
private static SearchDescriptor<TestItem> BuildQuery(string searchPhrase)
{
var querifiedKeywords = string.Join(" AND ", searchPhrase.Split(' '));
var filters = new BaseFilter[1];
filters[0] = Filter<TestItem>.Bool(b => b.Should(m => m.Query(q =>
q.FuzzyLikeThis(flt =>
flt.OnFields(new[] {
"name"
}).LikeText(querifiedKeywords)
.PrefixLength(2)
.MaxQueryTerms(1)
.Boost(2))
)));
var searchDescriptor = new SearchDescriptor<TestItem>()
.Filter(f => f.Bool(b => b.Must(filters)))
.Index("elastictesting")
.Type("TestItem")
.Size(500);
var jsons = JsonConvert.SerializeObject(searchDescriptor, new JsonSerializerSettings { NullValueHandling = NullValueHandling.Ignore });
return searchDescriptor;
}
}
class TestItem {
public int Id { get; set; }
[ElasticProperty(Analyzer = "text-en", Index = FieldIndexOption.analyzed)]
public string Name { get; set; }
}
}
Edited 2014-04-01 11:18
Well, I ended up using MultiMatch and QueryString, so this it how my code looks now. Hope it mey help anyone in the furure. Also, I added a Description property to my TestItem to illustrate multimatch.
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Nest;
using Newtonsoft.Json;
namespace ElasticSearchTest
{
class Program
{
static void Main(string[] args)
{
var indexSettings = new IndexSettings();
ElasticClient.CreateIndex("elastictesting", indexSettings);
var testItem1 = new TestItem {
Id = 1,
Name = "Buttermilk",
Description = "butter with milk"
};
ElasticClient.Index(testItem1, "elastictesting", "TestItem", testItem1.Id);
var testItem2 = new TestItem {
Id = 2,
Name = "Buttercream",
Description = "Butter with cream"
};
ElasticClient.Index(testItem2, "elastictesting", "TestItem", testItem2.Id);
var testItem3 = new TestItem {
Id = 3,
Name = "Butternut",
Description = "Butter with nut"
};
ElasticClient.Index(testItem3, "elastictesting", "TestItem", testItem3.Id);
Console.WriteLine("Write search phrase:");
var searchPhrase = Console.ReadLine();
var searchResults = Search(searchPhrase);
Console.WriteLine("Number of search results: " + searchResults.Count());
foreach (var item in searchResults) {
Console.WriteLine(item.Name);
Console.WriteLine(item.Description);
}
Console.WriteLine("Press any key to exit");
Console.ReadKey();
}
private static List<TestItem> Search(string searchPhrase)
{
var query = BuildQuery(searchPhrase);
var result = ElasticClient
.Search(query)
.Documents
.Select(d => d)
.Distinct()
.ToList();
return result;
}
public static ElasticClient ElasticClient
{
get
{
var localhost = new Uri("http://localhost:9200");
var setting = new ConnectionSettings(localhost);
setting.SetDefaultIndex("elastictesting");
return new ElasticClient(setting);
}
}
private static SearchDescriptor<TestItem> BuildQuery(string searchPhrase)
{
var searchDescriptor = new SearchDescriptor<TestItem>()
.Query(q => q
.MultiMatch(m =>
m.OnFields(new[] {
"name",
"description"
}).QueryString(searchPhrase).Type(TextQueryType.PHRASE_PREFIX)
)
)
.Index("elastictesting")
.Type("TestItem")
.Size(500);
var jsons = JsonConvert.SerializeObject(searchDescriptor, new JsonSerializerSettings { NullValueHandling = NullValueHandling.Ignore });
return searchDescriptor;
}
}
class TestItem {
public int Id { get; set; }
public string Name { get; set; }
public string Description { get; set; }
}
}

Instead of using FuzzyLikequery.. use prefix query its more fast and accurate..!
for more information refer
curl -XPOST "http://localhost:9200/try/indextype/_search" -d'
{
"query": {
"prefix": {
"field": {
"value": "Butter"
}
}
}
}'
create above query in NEST and try again..!

This has nothing to do with FuzzyLikeThis.
You can use prefixquery as suggested by #BlackPOP out of the box.
You could also opt for using EdgeNGrams, this will tokenize your input on index-time. The result faster performance as compared to prefixquery, offset against increased index size.
One thing to keep in mind is that prefixquery only works on non-analyzed fields, so if you want to do any anaylzing at indexing-time, you're probably better off using EdgeNGrams.
Please read up on anaylzers etc, if you don't know what they are.
Some refs:
http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/analysis-analyzers.html
http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/analysis-edgengram-tokenizer.html
See How can I do a prefix search in ElasticSearch in addition to a generic query string? for a similar question.

Convert array to multidimensional array in C#

I'm quite new with C#. I have a function which gives me the results in an array like this
[0] => value
[1] => value
[2] => value
[3] => value
[4] => value
But in my case, [0] [1] [2] need to be together, and I show them in a table in PHP.
This is my function:
public List<string> ReadOpenCalls(int relation)
{
IQAssemblyResolver.Initialize(#"C:\Program Files\.....");
IQSDK IQSDK = new IQSDK();
string loginTekst = IQSDK.Login("Administrator", "..", "..").GetResult();
SDKRecordset inboundSet = IQSDK.CreateRecordset("R_ACTIONSCOPE", "CODE, DESCRIPTION, DATECREATED", "FK_RELATION = " + relation, "");
var messages = new List<string>();
if (inboundSet != null && inboundSet.RecordCount > 0)
{
inboundSet.MoveFirst();
do
{
string code = inboundSet.Fields["CODE"].Value.ToString();
string desc = inboundSet.Fields["DESCRIPTION"].Value.ToString();
string date = inboundSet.Fields["DATECREATED"].Value.ToString();
messages.Add( code);
messages.Add( desc);
messages.Add( date);
inboundSet.MoveNext();
}
while (!inboundSet.EOF);
return messages;
}
messages.Add("Error niet gelukt");
return messages;// null;
}
I want the output to be something like this:
[0] => [0] => "desc"
[1] => "code"
[2] => "date"
So that I can output this in a nice way in my table in PHP.

A very quick fix:
var messages = new List<string[]>();
...
messages.Add( new string[] { code, desc, date});
But it also depends on what is easy to work with in PHP.
A better solution, probably, is to write a small class:
class MyMessage
{
public string Code { get; set; }
public string Desc { get; set; }
public string Date { get; set; }
}
And of course you'd have to change the method into one of:
public List<string[]> ReadOpenCalls(int relation) ...
public List<MyClass> ReadOpenCalls(int relation) ...
and that change also needs to be made in the ServiceContract etc.

PHP induces bad practices and a horrible understanding of data structures. Please do not try to pattern anything after whatever you saw or did in PHP. In particular, using array indices as a substitute for proper members.
Have you considered writing a class that has three fields to describe a message?

Ideally you want to change the existing function, however using System.Linq you could alter your results after you've generated them.
var messages = ReadOpenCalls(relation);
var new messages = messages.Select((a,i) => new {index = i / 3, value = a})
.GroupBy (y => y.index, y => y.value)
.Select(g => g.ToList())
.ToList();
However you would be far better altering your function
either add the list directly
public List<List<string>> ReadOpenCalls(int relation)
{
IQAssemblyResolver.Initialize(#"C:\Program Files\.....");
IQSDK IQSDK = new IQSDK();
string loginTekst = IQSDK.Login("Administrator", "..", "..").GetResult();
SDKRecordset inboundSet = IQSDK.CreateRecordset("R_ACTIONSCOPE", "CODE, DESCRIPTION, DATECREATED", "FK_RELATION = " + relation, "");
var messages = new List<List<string>>();
if (inboundSet != null && inboundSet.RecordCount > 0)
{
inboundSet.MoveFirst();
do
{
string code = inboundSet.Fields["CODE"].Value.ToString();
string desc = inboundSet.Fields["DESCRIPTION"].Value.ToString();
string date = inboundSet.Fields["DATECREATED"].Value.ToString();
messages.Add(new List<string> { code, desc, date});
inboundSet.MoveNext();
}
while (!inboundSet.EOF);
return messages;
}
messages.Add("Error niet gelukt");
return messages;// null;
}
or make a class to hold the values and return a list of the class
UPDATE - OP has stated this is in a webservice so I've added the DataContract and DataMember attributes. You will need to make sure the project references System.Runtime.Serialization
using System.Runtime.Serialization;
[DataContract]
public class Class {
public Class(string code, string desc, string date) {
this.code = code;
this.desc = desc;
this.date = date;
}
[DataMember]
public string Code { get;set; }
[DataMember]
public string Desc { get;set; }
[DataMember]
public string Date { get;set; }
}
And then your altered function
public List<Call> ReadOpenCalls(int relation)
{
IQAssemblyResolver.Initialize(#"C:\Program Files\.....");
IQSDK IQSDK = new IQSDK();
string loginTekst = IQSDK.Login("Administrator", "..", "..").GetResult();
SDKRecordset inboundSet = IQSDK.CreateRecordset("R_ACTIONSCOPE", "CODE, DESCRIPTION, DATECREATED", "FK_RELATION = " + relation, "");
var messages = new List<Call>();
if (inboundSet != null && inboundSet.RecordCount > 0)
{
inboundSet.MoveFirst();
do
{
string code = inboundSet.Fields["CODE"].Value.ToString();
string desc = inboundSet.Fields["DESCRIPTION"].Value.ToString();
string date = inboundSet.Fields["DATECREATED"].Value.ToString();
messages.Add( new Call(code,desc, date));
inboundSet.MoveNext();
}
while (!inboundSet.EOF);
return messages;
}
messages.Add("Error niet gelukt");
return messages;// null;
}

Try this,
Change
public List<string> ReadOpenCalls(int relation)
to
public List<List<string>> ReadOpenCalls(int relation)
Change
var messages = new List<string>();
to
var messages = new List<List<string>>();
And change
messages.Add( code);
messages.Add( desc);
messages.Add( date);
to
List<string> list = new List<string>();
list.Add( code);
list.Add(desc);
list.Add(date);
messages.Add(list);

Change function return value to string[][] and return the jagged array however you like.