枚举与下拉列表的空间属性 [英] enum with space property for dropdownlist

问题描述

因为我没有空间在枚举，我正在尝试这样做，但似乎不喜欢它....

  public enum EnumState 
 {
 NewYork，
 NewMexico 
} 
 
 
 public EnumState State 
 {
 get 
 {
 return EnumState; 
} 
 set 
 {
 if（EnumState .ToString（）==NewYork.ToString（））
 {
 value =New York 的ToString（）; 
 EnumState = value; 
} 
} 
} 
  

解决方案

我已经看到这一般通过在枚举成员上放置一个 [StringValue（New York）] 属性来处理。快速谷歌搜索返回这个博客文章有一个很好的方法。

基本上使属性类：

  public class StringValueAttribute：Attribute {
 
 public string StringValue {get;保护套} 
 
 public StringValueAttribute（string value）{
 this.StringValue = value; 
} 
} 
  

还有一种扩展方法来访问它：

  public static string GetStringValue（此枚举值）{
 //获取类型
类型type = value.GetType （）; 
 
 //获取此类型的fieldinfo 
 FieldInfo fieldInfo = type.GetField（value.ToString（））; 
 
 //获取stringvalue属性
 StringValueAttribute []; attribs = fieldInfo.GetCustomAttributes（
 typeof（StringValueAttribute），false）as StringValueAttribute []; 
 
 //如果有匹配，返回第一个，如果没有匹配则返回枚举值
返回attribs.Length> 0？ attribs [0] .StringValue：value.ToString（）; 
} 
  

那么你的枚举将如下所示：

  public enum EnumState {
 [StringValue（New York）] 
 NewYork，
 [StringValue（New Mexico ）] 
 NewMexico，
} 
  

，你可以使用 myState.GetStringValue（）;

since i can not have space in enum and i am trying to do something like this but seems like does not like it....

public enum EnumState
{
    NewYork,
    NewMexico
}


public EnumState State
    {
        get
        {
            return EnumState ;
        }
        set
        {
            if (EnumState .ToString() == "NewYork".ToString())
            {
                value = "New York".ToString();
                EnumState = value;
            }
        }
    }

解决方案

I have seen this generally handled by putting a [StringValue("New York")] attribute on the enum members. A quick google search returns this blog post, which has a pretty good way of doing it.

Basically make the attribute class:

public class StringValueAttribute : Attribute {

    public string StringValue { get; protected set; }

    public StringValueAttribute(string value) {
        this.StringValue = value;
    }
}

And an extension method to access it:

   public static string GetStringValue(this Enum value) {
        // Get the type
        Type type = value.GetType();

        // Get fieldinfo for this type
        FieldInfo fieldInfo = type.GetField(value.ToString());

        // Get the stringvalue attributes
        StringValueAttribute[] attribs = fieldInfo.GetCustomAttributes(
            typeof(StringValueAttribute), false) as StringValueAttribute[];

        // Return the first if there was a match, or enum value if no match
        return attribs.Length > 0 ? attribs[0].StringValue : value.ToString();
    }

Then your enum would look like this:

public enum EnumState{
  [StringValue("New York")]
  NewYork,
  [StringValue("New Mexico")]
  NewMexico,
}

and you can just use myState.GetStringValue();

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