c#中结构和属性的问题 [英] Problem with struct and property in c#

问题描述

在一个文件中我定义了一个公共结构

in a file I defined a public struct

public struct mystruct
{
    public Double struct1;
    public Decimal struct2;
}

在另一个我尝试这样做:

In another I tried to do this:

class Test
{
    mystruct my_va;

    public mystruct my_va
    {
        get { return my_va; }
        set { my_va = value; }
    }

    public Test()
    {
        my_va.struct1 = 10;
    }
}

Intellisense 识别 My_va.struct1 但编译器说

Intellisense recognizes My_va.struct1 but compiler says

错误 1 ​​无法修改返回值'TEST.mystruct' 因为它不是变量

Error 1 Cannot modify the return value of 'TEST.mystruct' because it is not a variable

如何更正语法?

推荐答案

强烈建议避免使用可变结构.他们表现出各种令人惊讶的行为.

It is highly recommended to avoid mutable structs. They exhibit all sorts of surprising behaviour.

解决方案:使您的结构不可变.

Solution: Make your struct immutable.

public struct MyStruct
{
    public readonly double Value1;
    public readonly decimal Value2;

    public MyStruct(double value1, decimal value2)
    {
        this.Value1 = value1;
        this.Value2 = value2;
    }
}

用法:

class Test
{
    private MyStruct myStruct;

    public Test()
    {
        myStruct = new MyStruct(10, 42);
    }

    public MyStruct MyStruct
    {
        get { return myStruct; }
        set { myStruct = value; }
    }
}

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