成员名称不能与它们的封闭类型与局部类 [英] member names cannot be the same as their enclosing type with partial class

问题描述

我已经定义了一个局部类，像这样的属性：

I have defined a partial class with a property like this:

public partial class Item{    
    public string this[string key]
    {
        get
        {
            if (Fields == null) return null;
            if (!Fields.ContainsKey(key))
            {
                var prop = GetType().GetProperty(key);

                if (prop == null) return null;

                return prop.GetValue(this, null) as string;
            }

            object value = Fields[key];

            return value as string;
        }
        set
        {
            var property = GetType().GetProperty(key);
            if (property == null)
            {
                Fields[key] = value;
            }
            else
            {
                property.SetValue(this, value, null);
            }
        }
    }
}

所以，我可以这样做：

So that i can do:

 myItem["key"];

和获得字段字典的内容。但是，当我建立我得到：

and get the content of the Fields dictionary. But when i build i get:

成员名称不能与它们的封闭类型

"member names cannot be the same as their enclosing type"

为什么？

推荐答案

索引器会自动有一个默认的名称项目 - 这是你的包含类的名称。至于CLR而言，一个索引仅仅是一个参数属性，你不能用相同的名字包含类声明的属性，方法等。

Indexers automatically have a default name of Item - which is the name of your containing class. As far as the CLR is concerned, an indexer is just a property with parameters, and you can't declare a property, method etc with the same name as the containing class.

一种选择是重命名类，所以它不叫项目。另一个办法是更改用于索引的财产的名义，通过 [IndexerNameAttribute]

One option is to rename your class so it's not called Item. Another would be to change the name of the "property" used for the indexer, via [IndexerNameAttribute].

破碎短的例子：

class Item
{
    public int this[int x] { get { return 0; } }
}

按名称变更修正：

Fixed by change of name:

class Wibble
{
    public int this[int x] { get { return 0; } }
}

或者

using System.Runtime.CompilerServices;

class Item
{
    [IndexerName("Bob")]
    public int this[int x] { get { return 0; } }
}

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