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How to Retrieve subgrid values using plugin and store that retrieved column value as comma separated in normal text field

I have sub grid called track and location in event entity. Now I want to retrieve the name of the sub grid values and store that values in the text field.In pathway List field I need to add track name as comma separated if it is associate. If it is disassociate I need to remove the particular value form text field.I am new to plugin. I tried query expression but I don't have any common filed for track and event entity to use filter condition. Can u any one suggest the way to achieve this quickly.
I tried below code:
if (context.MessageName.ToLower() == "associate")
{
// Obtain the target entity from the input parameters.
Entity eventEntity = new Entity("leap_event");
var pathwayList ="" ;
QueryExpression query = new QueryExpression("leap_event");
query.ColumnSet = new ColumnSet(true);
LinkEntity linkEntity1 = new LinkEntity("leap_event", "leap_leap_event_leap_location", "leap_eventid", "leap_eventid", JoinOperator.Inner);
LinkEntity linkEntity2 = new LinkEntity("leap_leap_event_leap_location", "leap_location", "leap_locationid", "leap_locationid", JoinOperator.Inner);
linkEntity1.LinkEntities.Add(linkEntity2);
query.LinkEntities.Add(linkEntity1);
linkEntity2.LinkCriteria = new FilterExpression();
linkEntity2.LinkCriteria.AddCondition(new ConditionExpression("", ConditionOperator.Equal, ""));
EntityCollection collRecords = service.RetrieveMultiple(query);
tracingService.Trace("load");
for (int i = 0; i < collRecords.Entities.Count; i++)
{
tracingService.Trace("load1");
var result = collRecords.Entities[i].GetAttributeValue<string>("leap_name");
Console.WriteLine(result);
pathwayList += result + ",";
tracingService.Trace("pathwayName" + pathwayList);
eventEntity["leap_pathwayList"] = pathwayList;
}
}

you will have to use alias for your linked Entity. Take a sample example below.
I have Account Entity--> (N:N) list member Entity--> (N:N) List Entity.
In your case it would be
leap_event Entity--> (N:N) leap_leap_event_leap_location Entity--> (most probably N:N or 1:N) leap_event_leap_location entity.
In addition when you retrieve attribute you will have to use GetAttributeValue<AliasedValue> Take a look at this article it will help you understand
// Instantiate QueryExpression query
var query = new QueryExpression("account");
// Add columns to query.ColumnSet
query.ColumnSet.AddColumns("name", "accountid");
// Add link-entity listmemberentity
var listmemberentity = query.AddLink("listmember", "accountid", "entityid");
listmemberentity.EntityAlias = "listmemberentity";
// Add link-entity listentity
var listentity = listmemberentity.AddLink("list", "listid", "listid");
listentity.EntityAlias = "listentity";
// Add columns to listentity.Columns
listentity.Columns.AddColumns("listname");

It is not necessary to use linkentity.
The QueryExpression must be performed directly on the associated entity, with filter on lookup field (I assume "leap_eventid" field on "leap_location" entity) :
if (context.MessageName.ToLower() == "associate")
{
var query = new QueryExpression("leap_location");
query.ColumnSet.AddColumn("leap_name");
// Lookup filter
query.Criteria.AddCondition(new ConditionExpression("leap_eventid", ConditionOperator.Equal, context.TargetEntity.Id));
// Optional statecode filter
query.Criteria.AddCondition(new ConditionExpression("statecode", ConditionOperator.Equal, 0));
var collRecords = service.RetrieveMultiple(query);
if (collRecords.Entities.Count > 0)
{
var pathwayList = string.Empty;
foreach (var location in collRecords.Entities)
{
pathwayList += location.GetAttributeValue<string>("leap_name") + ",";
tracingService.Trace($"pathwayName {pathwayList}");
}
}
var eventEntity = new Entity("leap_event", context.TargetEntity.Id)
{
["leap_pathwayList"] = pathwayList
};
service.Update(eventEntity); // Update required for PostOperation Plugin
}

Search a Json object array- List vs Dictionary

I deserialized a JsonResponse using the below code.
var data = (JObject)JsonConvert.DeserializeObject(jsonResponse);
I got the response string which looks something like this
{
"results":[
{
"url":"tickets/2063.json",
"id":20794,
"subject":"Device not working",
"created_date": "2018-01-10T13:03:23Z",
"custom-fields":[
{
"id":25181002,
"value":34534
},
{
"id":2518164,
"value":252344
}
]
}
]
}
My objective is to read certain fields in this array of json objects and insert into a database. The fields i require are id, subject, created_date, member_id.
The member id is part of the custom fields. member_id is the value where id=2518164. I've used List to store this, can you let me know if List or Dictionary is better for this case. How to implement a dictionary
var data = (JObject)JsonConvert.DeserializeObject(jsonResponse);
var tickets = data["results"].ToList();
foreach (var ticketItem in tickets){
Int64? ticketFormId = ticketItem["id"].Value<Int64>();
string subject = ticketItem["subject"].Value<string>();
DateTime createdDate = ticketItem["created_date"].Value<DateTime>();
//Do you think for the next step a dictionary is better or a List is better, since I want to search for a particular id=2518164
var fieldsList = ticketItem["fields"].ToList();
foreach(var fieldItem in fieldList){
Int64? fieldId = fieldItem["id"].Value<Int64>();
if(fieldId!=null && fieldId == 2518164){
memberId = fieldItem["value"].Value<string>();
}
}
}

If you're next step to insert them all into the database, just store them into a list. A dictionary is only useful to search the item by a key.
You can also use linq to process the json in a simpler way:
var tickets = JObject.Parse(jsonResponse)["results"]
.Select(ticket => new
{
Id = (long)ticket["id"],
Subject = (string)ticket["subject"],
CreatedDate = (DateTime)ticket["created_date"],
MemberId = (long)ticket["custom-fields"]
.FirstOrDefault(cf => (int)cf["id"] == 2518164)
?["value"],
})
.ToList();

LiteoDB and var List inserts C#

I'm trying to use LiteDB, I have the following:
var list2 = new List<Values>();
I've been looking at the LiteDB examples which is the following:
// Get customer collection
var col = db.GetCollection<Customer>("customers");
var customer = new Customer { Id = 1, Name = "John Doe" };
// Insert new customer document
col.Insert(customer);
// Update a document inside a collection
customer.Name = "Joana Doe";
col.Update(customer);
// Index document using a document property
col.EnsureIndex(x => x.Name);
Is there any way I can insert a list of type Values in my case it would be: var list2 = new List();
I can't seem to find anywhere that inserts this way.
Thanks,

This worked for me!!
var col = db.GetCollection<Values>("customers");
col.Insert(list2);
Thanks,

Trying to compare tags in mongodb string array, with textbox input c#

Okay so i have a mongodb that has a collection that is called videos and in videos i have a field called tags. what i want to do is compare a textbox input with the tags on all videos in the collection and return them to a gridview if a tag matches the input from the textbox. When i create a new video the tags field is a string Array so it is possible to store more than one tag. I am trying to do this in c#. Hope you some of you can help thanks!
Code for creating a new video document.
#region Database Connection
var client = new MongoClient();
var server = client.GetServer();
var db = server.GetDatabase("Database");
#endregion
var videos = db.GetCollection<Video>("Videos");
var name = txtVideoName.Text;
var location = txtVideoLocation.Text;
var description = txtVideoDescription.Text;
var user = txtVideoUserName.Text;
string[] lst = txtVideoTags.Text.Split(new char[] { ',' });
var index = videos.Count();
var id = 0;
if (id <= index)
{
id += (int)index;
}
videos.CreateIndex(IndexKeys.Ascending("Tags"), IndexOptions.SetUnique(false));
var newVideo = new Video(id, name, location, description, lst, user);
videos.Insert(newVideo);
Okay so here is how the search method looks like i have just made the syntax a little diffrent from what Grant Winney ansewred.
var videos = db.GetCollection<Video>("Videos");
string[] txtInput = txtSearchTags.Text.Split(new char[] { ',' });
var query = (from x in videos.AsQueryable<Video>()
where x.Tags.ContainsAny(txtInput)
select x);

This finds all videos with tags that contain a tag specified in the TextBox, assuming the MongoDB driver can properly translate it into a valid query.
var videos = db.GetCollection<Video>("Videos")
.AsQueryable()
.Where(v => v.Tags.Split(',')
.ContainsAny(txtVideoTags.Text.Split(',')))
.ToList();
Make sure you've got using MongoDB.Driver.Linq; at the top.

Querying a list of strings with a query string?

I have a dictionary:
<string,List<string>>
The key is the product code say "product1" then the list is a list of properties:
"Brand","10.40","64","red","S"
Then I 'can' have a list of rules/filters e.g.
var tmpFilter = new customfilters();
tmpFilter.Field = "2";
tmpFilter.Expression = ">";
tmpFilter.Filter = "10";
So for the above example this would pass because at index 2 (tmpFilter.Field) it is more than 10; then I have another object which defines which fields within the list I want to write to file. For that dictionary item I just want to write the product brand and price where the filters match.
At the moment without the filter I have:
var tmp = new custom();
tmp.Columns = "0,1";
tmp.Delimiter = ",";
tmp.Extention = ".csv";
tmp.CustomFilters = new List<customfilters>() {new customfilters(){ Field = "2", Expression = ">", Filter = "10"} };
public static void Custom(custom custom)
{
foreach (var x in Settings.Prods)
{
//Get Current Product Code
var curprod = Settings.ProductInformation[x];// the dictionary value
foreach (var column in custom.Columns)
{
var curVal = curprod[Convert.ToInt32(column)];
tsw.Write(curVal + custom.Delimiter);
}
Settings.Lines++;
tsw.WriteLine();
}
tsw.Close();
}
I only want to write the curprod if all the filters pass for that list of strings.
How I can do this?

There's a really nice Nuget package based on an example published by Microsoft, that they have decided to make really hard to find for some reason, that allows dynamic linq queries:
https://www.nuget.org/packages/System.Linq.Dynamic/1.0.2
Source:
https://github.com/kahanu/System.Linq.Dynamic
Using that you can do stuff like this very easily (note: I used strings here because the OP states they have a List<string>):
List<string> stuff = new List<string> { "10.40", "64", "5", "56", "99", "2" };
var selected = stuff.Select(s => new { d = double.Parse(s) }).Where("d > 10");
Console.WriteLine(string.Join(", ", selected.Select(s => s.d.ToString()).ToArray()));
Outputs:
10.4, 64, 56, 99
That may give you a place to start. One thing you are going to have to tackle is identifying which of your fields are numeric and should be converted to a numeric type before trying to apply your filter. Otherwise you are going to comparing as strings.