如何从字符串表示形式创建枚举？ C＃ [英] how do I create an enum from a string representation? c#

问题描述

im试图从用户控件传回属于枚举的字符串列表，例如：

im trying to pass back from a user control a list of strings that are part of an enum, like this:

<bni:products id="bnProducts" runat="server" ProductsList="First, Second, Third"  />

，然后在代码中执行以下操作：

and in the code behid do something like this:

public enum MS 
    {
        First = 1,
        Second,
        Third
    };
    private MS[] _ProductList;
    public MS[] ProductsList
    {
        get
        {
            return _ProductList;
        }
        set
        {
            _ProductList = how_to_turn_string_to_enum_list;
        }
    }

我的问题是我不知道该如何旋转字符串进入一个枚举列表，那么 how_to_turn_string_to_enum_list应该是什么？还是您知道在用户控件中使用枚举的更好方法？我真的很希望能够传递一个整洁的列表

my problem is I dont know how to turn that string into a list of enum, so what should be "how_to_turn_string_to_enum_list"? or do you know of a better way to use enums in user controls? I really want to be able to pass a list that neat

推荐答案

Enum.Parse 是解析字符串以获取枚举的规范方法：

Enum.Parse is the canonical way to parse a string to get an enum:

MS ms = (MS) Enum.Parse(typeof(MS), "First");

但是您需要进行字符串分割。

but you'll need to do the string splitting yourself.

但是，您的媒体资源当前的类型为 MS [] -设置器中的 value 变量不会是字符串。我怀疑您需要将您的媒体资源设置为字符串，然后在其中进行解析，然后将结果存储在 MS [] 中。例如：

However, your property is currently of type MS[] - the value variable in the setter won't be a string. I suspect you'll need to make your property a string, and parse it there, storing the results in a MS[]. For example:

private MS[] products;

public string ProductsList
{
    get
    {
        return string.Join(", ", Array.ConvertAll(products, x => x.ToString()));
    }
    set
    {
        string[] names = value.Split(',');
        products = names.Select(name => (MS) Enum.Parse(typeof(MS), name.Trim()))
                        .ToArray();
    }
}

我不知道您是否需要直接公开数组本身-这取决于您要执行的操作。

I don't know whether you'll need to expose the array itself directly - that depends on what you're trying to do.

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