C# 如何使属性赋值在循环中独立

本文关键字：循环 独立 赋值 何使 属性 | 更新日期: 2023-09-27 17:56:11

我不确定我的标题是否足够清晰或具体，但这就是我要做的。

我有新课程 

public class Segments
    {            
        public List<double> List1 { get; set; }
        public List<double> List2 { get; set; } 
        public List<double> List3 { get; set; } 
        public List<double> List4 { get; set; } 
    }
public static void SplitSegments(CsvClass longList, List<Segments> segments)
    {
        Segments tempSegments = new Segments();
        List<double> list1 = new List<double>();
        List<double> list2 = new List<double>();
        List<double> list3 = new List<double>();
        List<double> list4 = new List<double>();
        // Nested For loop that goes through a longList with its own properties.
        // Below is a flag for when to split that longList.properties into segments
        if (flag == true)
        {
             //The lists are now complete for the first segment.
             list1.Add(longList.one[i]);
             list2.Add(longList.two[i]);
             list3.Add(longList.three[i]);
             list4.Add(longList.four[i]);
             //created a copy of the class properties
             tempSegments.List1 = new List<double>(list1);
             tempSegments.List2 = new List<double>(list2);
             tempSegments.List3 = new List<double>(list3);
             tempSegments.List4 = new List<double>(list4);
             //Add to List<Segments>
             segments.Add(tempSegments)
             //Clear lists in order to move on to creating next segment of the longList.
             list1.Clear();
             list2.Clear();
             list3.Clear();
             list4.Clear();
             break;
        }
    }
}

我的问题是，当创建新段并将其添加到List<Segments>时，所有段都成为新段的相同副本。

我想类中的列表仍然引用与列表相同的对象。我的问题是，当新段添加到List<Segments>时，它们不会删除旧段，我该如何做到这一点？

C# 如何使属性赋值在循环中独立

你应该移动这条线

Segments tempSegments = new Segments();

进入循环的主体，可能就在if子句内 if (flag == true) .这将在每次迭代时创建一个新段。

代码的整个部分如下所示：

    if (flag == true)
    {
         Segments tempSegments = new Segments();
         //The lists are now complete for the first segment.
         list1.Add(longList.one[i]);
         list2.Add(longList.two[i]);
         list3.Add(longList.three[i]);
         list4.Add(longList.four[i]);
         //created a copy of the class properties
         tempSegments.List1 = new List<double>(list1);
         tempSegments.List2 = new List<double>(list2);
         tempSegments.List3 = new List<double>(list3);
         tempSegments.List4 = new List<double>(list4);
         //Add to List<Segments>
         segments.Add(tempSegments)
         //Clear lists...
         list1.Clear();
         list2.Clear();
         list3.Clear();
         list4.Clear();
         break;
    }

//created a copy of the class properties
tempSegments = new Segments();  // otherwise you are just changing the properties on a single obj and adding that obj many times to your list.
tempSegments.List1 = new List<double>(list1);
tempSegments.List2 = new List<double>(list2);
tempSegments.List3 = new List<double>(list3);
tempSegments.List4 = new List<double>(list4);
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