Develop Reference

Merge data from two arrays or something else

How to combine Id from the list I get from file /test.json and id from list ourOrders[i].id?
Or if there is another way?
private RegionModel FilterByOurOrders(RegionModel region, List<OurOrderModel> ourOrders, MarketSettings market, bool byOurOrders)
{
var result = new RegionModel
{
updatedTs = region.updatedTs,
orders = new List<OrderModel>(region.orders.Count)
};
var json = File.ReadAllText("/test.json");
var otherBotOrders = JsonSerializer.Deserialize<OrdersTimesModel>(json);
OtherBotOrders = new Dictionary<string, OrderTimesInfoModel>();
foreach (var otherBotOrder in otherBotOrders.OrdersTimesInfo)
{
//OtherBotOrders.Add(otherBotOrder.Id, otherBotOrder);
BotController.WriteLine($"{otherBotOrder.Id}"); //Output ID orders to the console works
}
foreach (var order in region.orders)
{
if (ConvertToDecimal(order.price) < 1 || !byOurOrders)
{
int i = 0;
var isOurOrder = false;
while (i < ourOrders.Count && !isOurOrder)
{
if (ourOrders[i].id.Equals(order.id, StringComparison.InvariantCultureIgnoreCase))
{
isOurOrder = true;
}
++i;
}
if (!isOurOrder)
{
result.orders.Add(order);
}
}
}
return result;
}
OrdersTimesModel Looks like that:
public class OrdersTimesModel
{
public List<OrderTimesInfoModel> OrdersTimesInfo { get; set; }
}
test.json:
{"OrdersTimesInfo":[{"Id":"1"},{"Id":"2"}]}
Added:
I'll try to clarify the question:
There are three lists with ID:
First (all orders): region.orders, as order.id
Second (our orders): ourOrders, as ourOrders[i].id in a while loop
Third (our orders 2): from the /test.json file, as an array {"Orders":[{"Id":"12345..."...},{"Id":"12345..." ...}...]}
There is a foreach in which there is a while, where the First (all orders) list and the Second (our orders) list are compared. If the id's match, then these are our orders: isOurOrder = true;
Accordingly, those orders that isOurOrder = false; will be added to the result: result.orders.Add(order)
I need:
So that if (ourOrders[i].id.Equals(order.id, StringComparison.InvariantCultureIgnoreCase)) would include more Id's from the Third (our orders 2) list.
Or any other way to do it?

You should be able to completely avoid writing loops if you use LINQ (there will be loops running in the background, but it's way easier to read)
You can access some documentation here: https://learn.microsoft.com/en-us/dotnet/csharp/programming-guide/concepts/linq/introduction-to-linq-queries
and you have some pretty cool extension methods for arrays: https://learn.microsoft.com/en-us/dotnet/api/system.linq.enumerable?view=net-6.0 (these are great to get your code easy to read)
Solution
unsing System.Linq;
private RegionModel FilterByOurOrders(RegionModel region, List<OurOrderModel> ourOrders, MarketSettings market, bool byOurOrders)
{
var result = new RegionModel
{
updatedTs = region.updatedTs,
orders = new List<OrderModel>(region.orders.Count)
};
var json = File.ReadAllText("/test.json");
var otherBotOrders = JsonSerializer.Deserialize<OrdersTimesModel>(json);
// This line should get you an array containing
// JUST the ids in the JSON file
var idsFromJsonFile = otherBotOrders.Select(x => x.Id);
// Here you'll get an array with the ids for your orders
var idsFromOurOrders = ourOrders.Select(x => x.id);
// Union will only take unique values,
// so you avoid repetition.
var mergedArrays = idsFromJsonFile.Union(idsFromOurOrders);
// Now we just need to query the region orders
// We'll get every element that has an id contained in the arrays we created earlier
var filteredRegionOrders = region.orders.Where(x => !mergedArrays.Contains(x.id));
result.orders.AddRange(filteredRegionOrders );
return result;
}
You can add conditions to any of those actions (like checking for order price or the boolean flag you get as a parameter), and of course you can do it without assigning so many variables, I did it that way just to make it easier to explain.

C# List of splitted strings

I have the following problem.
I have these strings with whitespace between them.
"+name:string" "+age:int"
I split them with this code:
List<string> stringValueList = new List<string>();
stringValueList = System.Text.RegularExpressions.Regex.Split(stringValue, #"\s{2,}").ToList<string>();
now the elements of List looks like this
"+name:string"
"+age:int"
Now I want to split these strings and create Objects.
This looks like this:
// Storing the created objects in a List of objects
List<myObject> objectList = new List<myObject>();
for(i = 1; i < stringValueList.Count ; i+=2)
{
myObject object = new myObject();
object.modifier = '+';
object.name = stringValueList[i-1].Trim('+'); // out of the example the object.name should be "name"
object.type = stringValueList[i]; // out of the example the object.type value should "string"
objectList.Add(object);
}
At the end I should get two objects with these values:
List<myObject> objectList{ myObject object1{modifier = '+' , name ="name" , type="string"}, myObject object2{modifier='+', name="age" type="int"}}
But my result looks like this:
List<myObject> objectList {myObject object1 {modifier='+', name="name:string" type="+age:int"}}
So instead of getting 2 Objects, I am getting 1 Object. It puts both strings into the elements of the first object.
Can anyone help me out? I guess my problem is in the for loop because i-1 value is the first string in the List and i is the second string but I cant change this.

I guess my problem is in the for loop because i-1 value is the first string in the List and i is the second string but I cant change this.
I don't know why you do i += 2, because apparently you want to split each string in two again. So just have to change that.
Use foreach(), and inside your loop, split your string again:
foreach (var stringValue in stringValueList)
{
myObject object = new myObject();
var kvp = stringValue.Split(':');
object.modifier = '+';
object.name = kvp[0].Trim('+');
object.type = kvp[1];
objectList.Add(object);
}
Of course this code assumes your inputs are always valid; you'd have to add some boundary checks to make it more robust.

Alternatively, you could expand your Regex formula to do the whole thing in one go.
For example, with (?<=")[+](.*?):(.*?)(?="), all you'd have to do is assign the matched group values.
foreach (Match m in Regex.Matches(stringValue, "(?<=\")[+](.*?):(.*?)(?=\")"))
{
myObject obj = new myObject
{
modifier = '+',
name = m.Groups[1].Value,
type = m.Groups[2].Value
};
objectList.Add(obj);
}

It's interesting to see how others approach a problem. I would have done something like this:
public class MyObject
{
public char Modifier { get; set; }
public string Name { get; set; }
public string Type { get; set; }
public static IEnumerable<MyObject> Parse(string str)
{
return str
.Split(' ')
.Where(s => string.IsNullOrEmpty(s) == false)
.ToList()
.ForEach(i =>
{
var sections = i.Remove(0, 1).Split(':');
return new MyObject()
{
Modifier = i[0],
Name = sections[0],
Type = sections[1]
};
});
}
}

Neo4j: How to return multiple paths from different starting nodes

I have a question similar to
this question but I am using the c# with the neo4jClient instead of the Java.
I can get the parent path of a given node with the following code but it becomes a performance bottle neck when trying to find the parent path of many nodes. What I would like is a way to call the graph database once with a list of node keys and get back a list of parent paths. So that I can return a dictionary of results instead of a single list.
Any help accomplishing this would be greatly appreciated! Also if my original cypher query can be improved I'm open to that as well.
public IEnumerable<IGenericEntity> GetPath(string entityCompositeKey, GraphRelationship relationship)
{
var entity = new GenericEntity();
entity.setCompositeKey(entityCompositeKey);
var pathToRoot = new List<GenericEntity>(){ entity };
var query = new CypherFluentQuery(graphClient)
.Match("p = (current)-[r:" + relationship.Name + "*0..]->()")
.Where((IGenericEntity current) => current.CompositeKey == entityCompositeKey)
.Return(() => Return.As<IEnumerable<GenericEntity>>("nodes(p)"))
.OrderByDescending("length(p)")
.Limit(10);
var queryText = query.Query.QueryText;
var paramText = query.Query.QueryParameters;
if (query.Results != null)
{
var graphResults = query.Results.FirstOrDefault();
if (graphResults != null && graphResults.ToList().Count > 0)
{
pathToRoot = graphResults.ToList();
}
}
return pathToRoot;
}

There are a few things I'm not sure of - and it's most likely how my test DB is setup.
To answer the initial question of how to pass in multiple start nodes - that's probably best approached using the UNWIND operator, which in Neo4jClient is used like so:
var enumerable = new string[] { "a", "b" }
client.Unwind(enumerable, "item"). /*The rest*/
Obvs, if you place that in the top of your current query you'll get a monster set of nodes back, and you won't know which Root entity refers to which, soo... let's do some projecting...
To project, we must have something to project into:
public class Result {
public GenericEntity Root { get; set; }
public List<GenericEntity> Nodes { get; set; }
public int Length { get; set; }
}
This will contain the Root node, and the path to it, now to fill.
public IEnumerable<Result> GetPath(IEnumerable<string> rootKeys, GraphRelationship relationship)
{
var query = new CypherFluentQuery(Client)
.Unwind(rootKeys, "entityRootKey")
.Match(string.Format("p = (root)-[r:{0}*0..]->()", relationship.Name))
.Where("root.CompositeKey = entityRootKey")
.With("{Root:root, Nodes: nodes(p), Length: length(p)} as res")
.Return((res) => res.As<Result>())
.OrderByDescending("res.Length")
.Limit(10);
var results = query.Results;
return results;
}
I'm not using .Where with a parameter creating Func<T> this is because the parameter is created in the .Unwind statement.
Usage wise - something like this:
var res = GetPath(new[] {"a", "b"}, new GraphRelationship {Name = "RELATED"});
foreach (var result in res)
{
Console.WriteLine($"{result.Root.CompositeKey} => {result.Length}");
foreach (var node in result.Nodes)
Console.WriteLine($"\t{node.CompositeKey}");
}

Cannot implicitly convert type '.List<AnonymousType#1>' to '.List<WebApplication2.Customer>'

In the following code that returns a list:
public List<Customer> GeAllCust()
{
var results = db.Customers
.Select(x => new { x.CustName, x.CustEmail, x.CustAddress, x.CustContactNo })
.ToList()
return results;
}
I get an error reporting that C# can't convert the list:
Error: Cannot implicitly convert type System.Collections.Generic.List<AnonymousType#1> to System.Collections.Generic.List<WebApplication2.Customer>
Why is that?
Here's a screenshot showing some additional information that Visual Studio provides in a tooltip for the error:
Is it right way to return some columns instead of whole table....?
public object GeAllCust()
{
var results = db.Customers.Select(x => new { x.CustName, x.CustEmail, x.CustAddress, x.CustContactNo }).ToList();
return results;
}

When you look the code:
x => new { ... }
This creates a new anonymous type. If you don't need to pull back only a particular set of columns, you can just do the following:
return db.Customers.ToList();
This assumes that Customers is an IEnumerable<Customer>, which should match up with what you are trying to return.
Edit
You have noted that you only want to return a certain subset of columns. If you want any sort of compiler help when coding this, you need to make a custom class to hold the values:
public class CustomerMinInfo
{
public string Name { get; set; }
public string Email { get; set; }
public string Address { get; set; }
public int? ContactNumber { get; set; }
}
Then change your function to the following:
public List<CustomerMinInfo> GetAllCust()
{
var results = db.Customers.Select(x => new CustomerMinInfo()
{
Name = x.CustName,
Email = x.Email,
Address = x.Address,
ContactNumber = x.CustContactNo
})
.ToList();
return results;
}
This will work, however, you will lose all relationship to the database context. This means if you update the returned values, it will not stick it back into the database.
Also, just to repeat my comment, returning more columns (with the exception of byte arrays) does not necessarily mean longer execution time. Returning a lot of rows means more execution time. Your function is returning every single customer in the database, which when your system grows, will start to hang your program, even with the reduced amount of columns.

You are selecting to an anonymous type, which is not a Customer.
If you want to do (sort of) this, you can write it like this:
return db.Customers.Select(x => new Customer { Name = x.CustName, Email = x.CustEmail, Address = x.CustAddress, ContactNo = x.ContactNo }).ToList();
This assumes the properties on your Customer object are what I called them.
** EDIT ** Per your comment,
If you want to return a subset of the table, you can do one of two things:
Return the translated form of Customer as I specified above, or:
Create a new class for your business layer that only has only those four fields, and change your method to return a List<ShrunkenCustomer> (assuming ShunkenCustomer is the name that you choose for your new class.)

GetAllCust() is supposed to return a List of Customer, Select New will create a list of Anonymous Types, you need to return a list of Customer from your query.
try:
var results = db.Customers.Select( new Customer{CustName = x.CustName}).ToList(); //include other fields

I guess Customer is a class you have defined yourself?
The my suggestion would be to do something like the following:
var results = db.Customers.Select(x => new Customer(x.Custname, x.CustEmail, x.CustAddress, x.CustContactNo)).ToList();
The reason is that you are trying to return a list of Customer but the results from your link is an anonymous class containing those four values.
This would of course require that you have a constructor that takes those four values.

Basically whatever u got in var type, loop on that and store it in list<> object then loop and achieve ur target.Here I m posting code for Master details.
List obj = new List();
var orderlist = (from a in db.Order_Master
join b in db.UserAccounts on a.User_Id equals b.Id into abc
from b in abc.DefaultIfEmpty()
select new
{
Order_Id = a.Order_Id,
User_Name = b.FirstName,
Order_Date = a.Order_Date,
Tot_Qty = a.Tot_Qty,
Tot_Price = a.Tot_Price,
Order_Status = a.Order_Status,
Payment_Mode = a.Payment_Mode,
Address_Id = a.Address_Id
});
List<MasterOrder> ob = new List<MasterOrder>();
foreach (var item in orderlist)
{
MasterOrder clr = new MasterOrder();
clr.Order_Id = item.Order_Id;
clr.User_Name = item.User_Name;
clr.Order_Date = item.Order_Date;
clr.Tot_Qty = item.Tot_Qty;
clr.Tot_Price = item.Tot_Price;
clr.Order_Status = item.Order_Status;
clr.Payment_Mode = item.Payment_Mode;
clr.Address_Id = item.Address_Id;
ob.Add(clr);
}
using(ecom_storeEntities en=new ecom_storeEntities())
{
var Masterlist = en.Order_Master.OrderByDescending(a => a.Order_Id).ToList();
foreach (var i in ob)
{
var Child = en.Order_Child.Where(a => a.Order_Id==i.Order_Id).ToList();
obj.Add(new OrderMasterChild
{
Master = i,
Childs = Child
});
}
}

Get SQL LINQ Results Based off of String List

Lets start off with a list of strings that will be used to filter the results:
List<String> RadioNames = new List<String>();
RadioNames.AddRange(new String[] { "abc", "123", "cba", "321" });
I want to be able to filter a LINQ to SQL database table based on RadioNames but the catch is that I want RadioNames to be a partial match (meaning it will catch Radio123 and not just 123).
The source that I need to filter is below:
var ChannelGrants = from cg in sddc.ChannelGrants
select new
{
cg.ID,
cg.Timestamp,
cg.RadioID,
cg.Radio
};
So I need to perform something similar to below (outside of the original ChannelGrants results as this is a conditional search)
if(RadioNamesToSearch != null)
{
List<String> RadioNames = new List<String>();
// Here I split all the radio names from RadioNamesToSearch based on a command separator and then populate RadioNames with the results
ChannelGrants = from cg in ChannelGrants
where ???
select cg;
}
I need help where ??? is in the code above (or if ChannelGrants = ... is invalid all together). Repeating above, I need to filter ChannelGrants to return any matches from RadioNames but it will do partial matches (meaning it will catch Radio123 and not just 123).
All the code is contained in a method as such...
public static DataTable getBrowseChannelGrants(int Count = 300, String StartDate = null, String StartTime = null, String EndDate = null, String EndTime = null, String RadioIDs = null, String RadioNamesToSearch = null, String TalkgroupIDs = null, String TalkgroupNames = null, bool SortAsc = false)

What field in ChannelGrants are you comparing RadioNames to?
To retrieve entries that are only in your RadioNames list, you'd use the contains method like this
ChannelGrants = from cg in ChannelGrants
where RadioNames.Contains(cg.Radio)
select cg;
(If you wanted to find all rows that had one of your RadioNames in the Radio property. Replace cg.Radio with the appropriate column you are matching)
This gives you a similar outcome if you had this where clause in SQL
where cg.Radio in ("abc", "123", "cba", "321")
from this link How to do SQL Like % in Linq?
it looks like you can combo it with like matching as well, but adding slashes, by it's not something I've done personally.

in place of the ???
RadioNames.Where(rn=>cg.Radio.ToLower().Contains(rn.ToLower())).Count() > 0
That should do it...
The ToLower() calls are optional, of course.
EDIT: I just wrote this and it worked fine for me in a Console Application. The result contained one item and the WriteLine spit out "cbaKentucky". Not sure what to tell ya.
class Program
{
static void Main(string[] args)
{
List<String> RadioNames = new List<String>();
RadioNames.AddRange(new String[] { "abc", "123", "cba", "321" });
List<ChannelGrants> grants = new List<ChannelGrants>();
grants.Add(new ChannelGrants() { ID = 1, Radio = "cbaKentucky", RadioID = 1, TimeStamp = DateTime.Now });
var result = from cg in grants
where RadioNames.Where(rn=>cg.Radio.ToLower().Contains(rn.ToLower())).Count() > 0
select cg;
foreach (ChannelGrants s in result)
{
Console.WriteLine(s.Radio);
}
}
}
class ChannelGrants
{
public int ID { get; set; }
public DateTime TimeStamp { get; set; }
public int RadioID { get; set; }
public string Radio { get; set; }
}

At the moment, there doesn't seem to be a best way so I'll answer this until a new answer that doesn't repeat the other answers that don't work on this thread.