对象枚举的实现

来源：互联网发布：ed视频编辑软件编辑：程序博客网时间：2024/06/03 02:43

对象枚举实例代码.

```
/// 
```
```
/// 邮箱状态
```
```
/// 
```
```
public class EmailStates
```
```
{
```
```
    static EmailStates()
```
```
    {
```
```
        Init();
```
```
        CheckID();
```
```
    }
```

    private static List<EmailState> _EmailStateList = new List<EmailState>();

    public static List<EmailState> EmailStateList

```
    {
```
```
        get
```
```
        {
```
```
            return _EmailStateList;
```
```
        }
```
```
    }
```
```
    private static void Init()
```
```
    {
```

        Type type = typeof(EmailStates);

        FieldInfo[] fields = type.GetFields(BindingFlags.Static | BindingFlags.Public);

        foreach (FieldInfo field in fields)

```
        {
```

            EmailState es = (EmailState)field.GetValue(null);

```
            _EmailStateList.Add(es);
```
```
        }
```
```
    }
```
```
    private static void CheckID()
```
```
    {
```

        for (int i = 0; i < _EmailStateList.Count; i++)

```
        {
```

            EmailState es = _EmailStateList[i];

            for (int j = i + 1; j < _EmailStateList.Count; j++)

```
            {
```

                if (es.Id == _EmailStateList[j].Id)

```
                {
```

                    throw new Exception("不能有相同的ID");

```
                }
```
```
            }
```
```
        }
```
```
    }
```

    public static EmailState GetEmailStateByName(string name)

```
    {
```

        foreach (EmailState es in _EmailStateList)

```
        {
```
```
            if(es.Name==name)
```
```
            {
```
```
                return es;
```
```
            }
```
```
        }
```
```
        return null;
```
```
    }
```

    public static EmailState GetEmailStateById(int id)

```
    {
```

        foreach (EmailState es in _EmailStateList)

```
        {
```
```
            if (es.Id == id)
```
```
            {
```
```
                return es;
```
```
            }
```
```
        }
```
```
        return null;
```
```
    }
```

    public static readonly EmailState 未使用 = new EmailState(1, "未使用");

    public static readonly EmailState 已使用 = new EmailState(2, "已使用");

```
}
```
```
public class EmailState
```
```
{
```
```
    private int _Id;
```
```
    private string _Name;
```
```
    public int Id
```
```
    {
```
```
        get{
```
```
            return _Id;
```
```
        }
```
```
    }
```
```
    public string Name
```
```
    {
```
```
        get{
```
```
            return _Name;
```
```
        }
```
```
    }
```

    public EmailState(int id,string name)

```
    {
```
```
        _Id = id;
```
```
        _Name = name;
```
```
    }
```
```
}
```

.src_container{background-color:#e7e5dc; width:99%; overflow:hidden; margin:12px 0 12px 0 !important; padding:0px 3px 3px 0px}.src_container .titlebar{ background-color:#d4dfff; border:1px solid #4f81bd; border-bottom:0; padding:3px 24px; margin:0; width:auto; line-height:120%; overflow:hidden; text-align:left; font-size:12px}.src_container .toolbar{ display:inline; font-weight:normal; font-size:100%; float:right; cursor:hand; color:#00f; text-align:left; overflow:hidden}.toolbar span.button{ display:inline; font-weight:normal; font-size:100%; cursor:hand; color:#00f; text-align:left; overflow:hidden; cursor:pointer;}.src_container div.clientarea{ background-color:white; border:1px solid #4f81bd; margin:0; width:auto !important; width:100%; height:auto; overflow:auto; text-align:left; font-size:12px; font-family: "Courier New","Consolas","Fixedsys",courier,monospace,serif}.src_container ol.mainarea{ padding:0 0 0 52px; margin:0; background-color:#f7f7ff !important}.number_show{ padding-left:52px !important; list-style:decimal outside !important}.number_show li{ list-style:decimal outside !important; border-left:1px dotted #4f81bd}.number_hide{ padding-left:0px !important; list-style-type:none !important}.number_hide li{ list-style-type:none !important; border-left:0px}ol.mainarea li{ display:list-item !important; font-size:12px !important; margin:0 !important; line-height:18px !important; padding:0 0 0 0px !important; background-color:#f7f7ff !important; color:#4f81bd}ol.mainarea li pre{color:black; line-height:18px; padding:0 0 0 12px !important; margin:0em; background-color:#fff !important}.linewrap ol.mainarea li pre{white-space:pre-wrap; white-space:-moz-pre-wrapwhite-space:-pre-wrap; white-space:-o-pre-wrap; word-wrap:break-word}ol.mainarea li pre.alt{ background-color:#f7f7ff !important}

以上是对象枚举的一个实例代码,主要是实现邮箱的状态表示.这样写的好处是可以像枚举一样访问对象,并能很方便的将数据绑定到控件上.还有很多其他好处,自己慢慢体会吧