这是我的课:
class Account{
public List<AccountRecord> AccountRecords{set;get;}
}
class AccountRecord{
public IEnumerable<AccountValue> AccountValues{set;get;}
}
class AccountValue{
public int ID{set;get;}
public decimal value{set;get;}
}
我可以使用实体框架 C# 示例按 ID 获取 AccountValue 值组的总和:
Data:
ID=1 value=5
ID=1 value=6
ID=2 value=7
ID=2 value=9
ID=3 value=2
Can I get this Result:
ID=1 Value=11
ID=2 value=16
ID=3 value=2
代码:
Account acc = new Account();
AccountRecord ar = new AccountRecord();
ar.AccountValues.Add(new AccountValue { ID = 1, value = 5 });
ar.AccountValues.Add(new AccountValue { ID = 1, value = 7 });
ar.AccountValues.Add(new AccountValue { ID = 2, value = 9 });
ar.AccountValues.Add(new AccountValue { ID = 2, value = 6 });
ar.AccountValues.Add(new AccountValue { ID = 3, value = 2 });
AccountRecord ar1 = new AccountRecord();
ar1.AccountValues.Add(new AccountValue { ID = 1, value = 10 });
ar1.AccountValues.Add(new AccountValue { ID = 1, value = 70 });
ar1.AccountValues.Add(new AccountValue { ID = 2, value = 90 });
ar1.AccountValues.Add(new AccountValue { ID = 2, value = 60 });
ar1.AccountValues.Add(new AccountValue { ID = 3, value = 20 });
acc.AccountRecords.Add(ar1);
我想从 Acc 对象中按 ID 获取值组的总和