c# - setter/getter setter 数组

Question

可能是一个我无法解决的非常简单的问题 - 我从 C# 开始，需要使用 getter/setter 方法向数组添加值，例如:

public partial class Form1 : Form
{
    string[] array = new string[] { "just","putting","something","inside","the","array"};


    public Form1()
    {
        InitializeComponent();
    }

    private void button1_Click(object sender, EventArgs e)
    {
        Array = "gdgd";
    }

    public string[] Array
    {
        get { return array; }
        set { array = value; }
    }
}

}

Answer 1

这永远不会起作用:

Array = "gdgd";

那是试图分配 string值为 string[]属性(property)。请注意，无论如何您都不能在数组中添加或删除元素，因为一旦创建了它们，其大小就是固定的。也许你应该使用 List<string>反而:

public partial class Form1 : Form
{
    List<string> list = new List<string> { 
        "just", "putting", "something", "inside", "the", "list"
    };    

    public Form1()
    {
        InitializeComponent();
    }

    private void button1_Click(object sender, EventArgs e)
    {
        List.Add("gdgd");
    }

    public List<string> List
    {
        get { return list; }
        set { list = value; }
    }
}

请注意，无论如何，拥有 public 属性在这里是无关紧要的，因为您是从同一个类中访问它 - 您可以只使用该字段:

private void button1_Click(object sender, EventArgs e)
{
    list.Add("gdgd");
}

另请注意，对于像这样的“琐碎”属性，您可以使用自动实现的属性:

public partial class Form1 : Form
{
    public List<string> List { get; set; }

    public Form1()
    {
        InitializeComponent();
        List = new List<string> { 
            "just", "putting", "something", "inside", "the", "list"
        };    
    }

    private void button1_Click(object sender, EventArgs e)
    {
        List.Add("gdgd");
    }
}