SO Question Group By With Having Clause LINQ 27730743 | C# Online Compiler

SO Question Group By With Having Clause LINQ 27730743 by Ehsan Sajjad

using System;
using System.Collections.Generic;
using System.Linq;

public class Program
{
	public static void Main()
	{
		
		List<Contract> Contracts = new List<Contract>()
		{
		new Contract
		{
		ID = 1, LearningPackageID = 2
		}

		, new Contract
		{
		ID = 2, LearningPackageID = 4
		}

		, new Contract
		{
		ID = 3, LearningPackageID = 6
		}
		}

		;
		List<DepositHistory> DepositHistories = new List<DepositHistory>()
		{
		new DepositHistory
		{
		CotractID = 1, Value = 100
		}

		, new DepositHistory
		{
		CotractID = 2, Value = 50
		}

		, new DepositHistory
		{
		CotractID = 3, Value = 200
		}
		}

		;
		List<LearningPackage> LearningPackages = new List<LearningPackage>()
		{
		new LearningPackage
		{
		ID = 2, COntractValue = 100
		}

		, new LearningPackage
		{
		ID = 4, COntractValue = 200
		}

		, new LearningPackage
		{
		ID = 6, COntractValue = 300
		}
		};
		
		
		var result =
			from b in DepositHistories
			join a in Contracts on b.CotractID equals a.ID
			join c in LearningPackages on a.LearningPackageID equals c.ID
			group b by new
			{
			a.ID, c.COntractValue
			}

				into g
				where g.Sum(x => x.Value) < g.Key.COntractValue || g.Sum(x => x.Value) == null || g.Sum(x => x.Value) == 0
				select new
				{
				ID = g.Key.ID, Value = g.Sum(x => x.Value), ContractValue = g.Key.COntractValue
				};
		
		
		foreach(var item in result)
		{
			Console.WriteLine(item);
		}

	
	}
}

public class Contract
{
	public int ID
	{
		get;
		set;
	}

	public int LearningPackageID
	{
		get;
		set;
	}
}

public class DepositHistory
{
	public int CotractID
	{
		get;
		set;
	}

	public int Value
	{
		get;
		set;
	}
}

public class LearningPackage
{
	public int ID
	{
		get;
		set;
	}

	public int COntractValue
	{
		get;
		set;
	}
}

​x
 
using System;
using System.Collections.Generic;
using System.Linq;
​
public class Program
{
    public static void Main()
    {
        
        List<Contract> Contracts = new List<Contract>()
        {
        new Contract
        {
        ID = 1, LearningPackageID = 2
        }
​
        , new Contract
        {
        ID = 2, LearningPackageID = 4
        }
​
        , new Contract
        {
        ID = 3, LearningPackageID = 6
        }
        }
​
        ;
        List<DepositHistory> DepositHistories = new List<DepositHistory>()
        {
        new DepositHistory
        {
        CotractID = 1, Value = 100
        }
​
        , new DepositHistory
        {
        CotractID = 2, Value = 50
        }
​
        , new DepositHistory
        {
        CotractID = 3, Value = 200
        }
        }
​
        ;
        List<LearningPackage> LearningPackages = new List<LearningPackage>()
        {
        new LearningPackage
        {
        ID = 2, COntractValue = 100
        }
​
        , new LearningPackage
        {
        ID = 4, COntractValue = 200
        }
​
        , new LearningPackage
        {
        ID = 6, COntractValue = 300
        }
        };
        
        
        var result =
            from b in DepositHistories
            join a in Contracts on b.CotractID equals a.ID
            join c in LearningPackages on a.LearningPackageID equals c.ID
            group b by new
            {
            a.ID, c.COntractValue
            }
​
                into g
                where g.Sum(x => x.Value) < g.Key.COntractValue || g.Sum(x => x.Value) == null || g.Sum(x => x.Value) == 0
                select new
                {
                ID = g.Key.ID, Value = g.Sum(x => x.Value), ContractValue = g.Key.COntractValue
                };
        
        
        foreach(var item in result)
        {
            Console.WriteLine(item);
        }
​
    
    }
}
​
public class Contract
{
    public int ID
    {
        get;
        set;
    }
​
    public int LearningPackageID
    {
        get;
        set;
    }
}
​
public class DepositHistory
{
    public int CotractID
    {
        get;
        set;
    }
​
    public int Value
    {
        get;
        set;
    }
}
​
public class LearningPackage
{
    public int ID
    {
        get;
        set;
    }
​
    public int COntractValue
    {
        get;
        set;
    }
}

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