如何从函数中检索多个值? [英] How to retrieve more than values from a function?

问题描述

如何从一个函数中检索多个值?

(string1，string2)= sourceValues(sourceId);

公共字符串sourceValues(字符串sourceId)
{
#做点事
返回string1，string2;
}

How to retrieve more than one values from a function?

(string1,string2) = sourceValues(sourceId);

public string sourceValues(string sourceId)
{
#do something
return string1, string2;
}

推荐答案

您可以执行以下操作:

You can do this:

Tuple<string,string> strTuple = sourceValues(sourceId);
// now strTuple.Item1 is the first string, and strTuple.Item2 is the second string

public Tuple<string,string> sourceValues(string sourceId)
{
// do something
return new Tuple<string,string>(string1,string2);
}

希望对您有所帮助.

Hope this helps.

我们应该从函数中返回Collection.

例如，我正在搜索从给定来源到目的地的巴士列表.

公共列表< string> GetBusInformation(字符串strSource，字符串strDestination)
{
List< string> objBusInformation = new List< string>();

//在此处写出找到总线的逻辑，找到总线后应将其添加到List< string>

//返回List< string>对象.

返回objBusInformation
}

问候，
RK

Hi,

We should return the Collection from the functions.

Say for example, I am searching for list of Buses that are travelling from given source to destination.

public List<string> GetBusInformation(string strSource, string strDestination)
{
List<string> objBusInformation=new List<string>();

// Here Write the Logic for finding the buses when the Bus is found it should be added to List<string>

// return the List<string> object.

return objBusInformation
}

Regards,
RK

以下是一些示例，

Here is some samples,

using System;
using System.Collections.Generic;

class Program
{
    static void GetTwoNumbers(out int number1, out int number2)
    {
    number1 = (int)Math.Pow(2, 2);
    number2 = (int)Math.Pow(3, 2);
    }

    static KeyValuePair<int, int> GetTwoNumbers()
    {
    return new KeyValuePair<int, int>((int)Math.Pow(2, 2), (int)Math.Pow(3, 2));
    }

    static void Main()
    {
    // Use out parameters for multiple return values.
    int value1;
    int value2;
    GetTwoNumbers(out value1, out value2);
    Console.WriteLine(value1);
    Console.WriteLine(value2);

    // Use struct for multiple return values.
    var pair = GetTwoNumbers();
    Console.WriteLine(pair.Key);
    Console.WriteLine(pair.Value);
    }
}

问候和感谢
sarva

regards and thanks
sarva

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