C#引用参数用法

Question

我正在使用引用参数返回多个信息。喜欢，

int totalTransaction = 0;
int outTransaction = 0;
int totalRecord = 0;

var record = reports.GetTransactionReport(searchModel, out totalTransaction, out outTransaction, out totalRecord);

//方法是这样的，

public List<TransactionReportModel> GetAllTransaction(
            TransactionSearchModel searchModel, 
            out totalTransaction,
            out totalTransaction,
            out totalRecord) {


    IQueryable<TransactionReportModel> result;
    // search

    return result.ToList();
}

但我不喜欢长参数，所以我尝试使用字典通过单个参数清理它。

Dictionary<string, int> totalInfos = new Dictionary<string, int>
{
    { "totalTransaction", 0 },
    { "outTransaction", 0 },
    { "totalRecord", 0 }
};

var record = reports.GetTransactionReport(searchModel, out totalInfos);

但还是不够好，因为没有 promise 关键字符串，就像硬编码。

我需要使用 Constant 作为键吗？或者针对这种情况有更好的解决方案吗？

Answer 1

只需使用一个类。并完全避免 out 参数:

class TransactionResult
{
    public List<TransactionReportModel> Items { get; set; }

    public int TotalTransaction { get; set; }
    public int OutTransaction { get; set; }
    public int TotalRecord { get; set; }
}


public TransactionResult GetAllTransaction(TransactionSearchModel searchModel)
{
    IQueryable<TransactionReportModel> result;
    // search

    return new TransactionResult
    { 
        Items = result.ToList(),
        TotalTransaction = ...,
        OutTransaction = ...,
        TotalRecord = ...
    };
}