C#在一个对象中返回多个值 [英] C# return multiple values in an object

问题描述

我有一个方法(AlphaCalcResult)，应该返回多个值.每个forloop都有一些逻辑，这些逻辑将值分配给List字段.然后，我想返回结果对象，其中包含从下面描述的两个循环生成的两个值. C#开发的新手，语法有问题.

I have a method (AlphaCalcResult) that should return multiple values. Each forloop has some logic which assigns value to a List field. I would then like to return the result object with the two values generated from two loops described below. New to C# development and having issues with the syntax.

我如何在下面的代码中使用return语句做到这一点?

How can I have return statement do that in my code below?

public AlphaCalcResult CalculateAlpha(AlphaCalcParam param)
{
    AlphaCalcResult result = new AlphaCalcResult
    {
        portfolios = new List<Portfolio>()
    };

    // Lists Portfolios & Settings
    var portfolioListItem = param.portfolios.portfolioHoldings;
    var scoreListItem = param.settings.grossAlphas;

    // 1. CALCULATE FUND ALPHA
    for (var i = 0; i<portfolioListItem.Count; i++)
    {
        portfolioListItem[i].fundRating = i;

        for (var j = 0; j<scoreListItem.Count; j++)
        {
            scoreListItem[j].fundRating = j;

            if(i == j)
            {
               portfolioListItem[i].fundAlpha = scoreListItem[j].grossAlpha - portfolioListItem[i].fundExpenseRatio;
            }
        }
    }

    //2. CALCULATE PORTFOLIO ALPHA
    var portfolioAlphaResult = param.portfolios.portfolioAlpha;
    for (var i =0; i<portfolioListItem.Count; i++)
    {
        portfolioAlphaResult = portfolioListItem[i].fundWeight * portfolioListItem[i].fundAlpha;
    };

    // populate result
    return result;
    }

推荐答案

首先将public IEnumerable<Portfolio> portfolios { get; set; }更改为

public List<Portfolio> portfolios { get; set; } 

因为IEnumerable用于读取列表，并在您的代码中添加

because IEnumerable is used for reading the list and in your code add

 //2. CALCULATE PORTFOLIO ALPHA
         for (var i =0; i<portfolioListItem.Count; i++)
            {

        List<PortfolioHolding> list = new List<PortfolioHolding>();
        list=portfolioListItem;
        Portfolio port = new Portfolio();
        port.portfolioIdentifier = "current";
        port.portfolioAlpha = portfolioListItem[i].fundWeight * portfolioListItem[i].fundAlpha;
        port.portfolioHoldings = list;
        result.portfolios.Add(port);

        };

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