而不是写一个大的解释文本，我想用图像来展示它
我怎样才能将这些数据分组为这样的：
松散地用类似的东西：
var obj = (
from f in context.assets
group f by new
{
f.signed,
f.typeOfInvestment
}
into gvc
select new
{
Signed = sum(Signed)
Unsigned = Sum(Unsigned)
NotAvailable = Sum(NotAvailable)
SumOfWorth = Sum(Signed + Unsigned + NotAvailable)
}).ToList();
所有帮助将不胜感激
真诚的啊
以下是用于旋转数据的代码
Linq 查询
Random rand = new Random();
var data = Enumerable.Range(0,15).Select(x=> new {Company= "Company" + rand.Next(1,100),
Signed="Sign" + rand.Next(1,4), StockType= "Type"+rand.Next(1,4), Worth=rand.Next(1000,2000)});
var sampleData = data.GroupBy(x=>x.StockType).Select( x=> new {StockType=x.Key, Signed = x.Count()});
var pivotData = data.GroupBy(x=>x.StockType).Select(
x=>
new
{ StockType=x.Key,
Signed = x.Where(y=>y.Signed=="Sign1").Count(),
UnSigned = x.Where(y=>y.Signed=="Sign2").Count(),
NA = x.Where(y=>y.Signed=="Sign3").Count(),
Total = x.Where(y=>y.Signed=="Sign1"||y.Signed=="Sign2"||y.Signed=="Sign3").Count()
});
UnPivot 数据（模拟输入）
Company Signed StockType WorthΞΞ
Company42 Sign1 Type3 1884
Company35 Sign2 Type3 1437
Company30 Sign1 Type2 1781
Company50 Sign2 Type3 1747
Company57 Sign1 Type2 1116
Company32 Sign1 Type2 1350
Company83 Sign3 Type2 1027
Company2 Sign1 Type3 1983
Company74 Sign1 Type2 1690
Company77 Sign3 Type1 1502
Company2 Sign1 Type1 1797
Company18 Sign1 Type1 1768
Company39 Sign1 Type1 1715
Company1 Sign1 Type2 1143
Company50 Sign2 Type1 1420
输出（未完全旋转，但根据此问题要求）
StockType Signed1 Signed2 Signed3 TotalΞΞ
Type2 1 0 2 3
Type1 2 3 1 6
Type3 3 2 1 6
首先，您不需要按Signed属性分组。其次，这是查询：
var result =
from g in context.Assets.GroupBy(x=>x.StockType)
let signed = g.Where(x => x.Signed == "signed").Sum(x=>x.Worth)
let unsigned = g.Where(x => x.Signed == "unsigned").Sum(x => x.Worth)
let notAvailable = g.Where(x => x.Signed == "notAvail").Sum(x => x.Worth)
select new
{
Signed = signed,
Unsigned = unsigned,
NotAvailable = notAvailable,
SumOfWorth = signed + unsigned + notAvailable
};
编码：
public class MainClass
{
enum SignEnum { signed, unsigned, notAvail }
class Element
{
public string Company;
public SignEnum Signed;
public string TypeOfInvestment;
public decimal Worth;
}
class GroupedResult
{
public string TypeOfInvestment;
public decimal signed, unsigned, notAvailable;
public decimal Sum;
}
public static void Main()
{
List<Element> elements = new List<Element>()
{
new Element { Company = "JPMORGAN CHASE", Signed = SignEnum.signed,
TypeOfInvestment = "Stocks", Worth = 96983 },
new Element { Company = "AMER TOWER CORP", Signed = SignEnum.unsigned,
TypeOfInvestment = "Securities", Worth = 17141 },
new Element { Company = "ORACLE CORP", Signed = SignEnum.unsigned,
TypeOfInvestment = "Assets", Worth = 59372 },
new Element { Company = "PEPSICO INC", Signed = SignEnum.notAvail,
TypeOfInvestment = "Assets", Worth = 26516 },
new Element { Company = "PROCTER & GAMBL", Signed = SignEnum.signed,
TypeOfInvestment = "Stocks", Worth = 387050 },
new Element { Company = "QUASLCOMM INC", Signed = SignEnum.unsigned,
TypeOfInvestment = "Bonds", Worth = 196811 },
new Element { Company = "UTD TECHS CORP", Signed = SignEnum.signed,
TypeOfInvestment = "Bonds", Worth = 257429 },
new Element { Company = "WELLS FARGO-NEW", Signed = SignEnum.unsigned,
TypeOfInvestment = "Bank Account", Worth = 106600 },
new Element { Company = "FEDEX CORP", Signed = SignEnum.notAvail,
TypeOfInvestment = "Stocks", Worth = 103955 },
new Element { Company = "CVS CAREMARK CP", Signed = SignEnum.notAvail,
TypeOfInvestment = "Securities", Worth = 171048 },
};
string header = "Company".PadLeft(15) + " " +
"Signed".PadLeft(10) + " " +
"Type Of Investment".PadLeft(20) + " " +
"Worth".PadLeft(10);
Console.WriteLine(header);
Console.WriteLine(new string('-', header.Length));
foreach (var e in elements)
{
Console.WriteLine(e.Company.PadLeft(15) + " " +
e.Signed.ToString().PadLeft(10) + " " +
e.TypeOfInvestment.PadLeft(20) + " " +
e.Worth.ToString().PadLeft(10));
}
Console.WriteLine();
var query = from e in elements
group e by e.TypeOfInvestment into eg
select new GroupedResult
{
TypeOfInvestment = eg.Key,
signed = eg.Where(x => x.Signed == SignEnum.signed).Sum(y => y.Worth),
unsigned = eg.Where(x => x.Signed == SignEnum.unsigned).Sum(y => y.Worth),
notAvailable = eg.Where(x => x.Signed == SignEnum.notAvail).Sum(y => y.Worth),
Sum = eg.Sum(y => y.Worth)
};
string header2 = "Type of investment".PadRight(20) + " " +
"signed".PadLeft(8) + " " +
"unsigned".PadLeft(8) + " " +
"notAvailable".PadLeft(13) + " " +
"Sum";
Console.WriteLine(header2);
Console.WriteLine(new string('-', header2.Length));
foreach (var item in query)
{
Console.WriteLine(item.TypeOfInvestment.PadRight(20) + " " +
item.signed.ToString().PadLeft(8) + " " +
item.unsigned.ToString().PadLeft(8) + " " +
item.notAvailable.ToString().PadLeft(13) + " " +
item.Sum.ToString()
);
}
}
}
结果：
Company Signed Type Of Investment Worth
----------------------------------------------------------
JPMORGAN CHASE signed Stocks 96983
AMER TOWER CORP unsigned Securities 17141
ORACLE CORP unsigned Assets 59372
PEPSICO INC notAvail Assets 26516
PROCTER & GAMBL signed Stocks 387050
QUASLCOMM INC unsigned Bonds 196811
UTD TECHS CORP signed Bonds 257429
WELLS FARGO-NEW unsigned Bank Account 106600
FEDEX CORP notAvail Stocks 103955
CVS CAREMARK CP notAvail Securities 171048
Type of investment signed unsigned notAvailable Sum
--------------------------------------------------------
Stocks 484033 0 103955 587988
Securities 0 17141 171048 188189
Assets 0 59372 26516 85888
Bonds 257429 196811 0 454240
Bank Account 0 106600 0 106600
试试这个：
var obj = (
from f in context.assets
group f by f.typeOfInvestment into gvc
let lookup = gvc.ToLookup(x => x.signed, x => x.worth)
select new
{
TypeOfInvestment = gvc.Key,
Signed = lookup["signed"].Sum(),
Unsigned = lookup["unsigned"].Sum(),
NotAvailable = lookup["notAvail"].Sum(),
SumOfWorth = gvc.Select(x => x.worth).Sum(),
}).ToList();