自定义定义combobox的枚举名称 [英] Custom define enum names for combobox
本文介绍了自定义定义combobox的枚举名称的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我有一个命名空间，其中我已声明一个枚举如下：
命名空间IXMSoft.Business.SDK.Data
{
using System;
public enum BaudRate
{
BR115200 = 7，
BR19200 = 4，
BR230400 = 8，
BR2400 = 1，
BR38400 = 5，
BR4800 = 2，
BR57600 = 6，
BR9600 = 3
}
}
当我在另一个命名空间中的组合框中检索这些值时，使用语句
comboBox1.Items.Add（BaudRate.BR5700）;
它显示的值如
BR5700
我要
以显示值为5700。
我该怎么办？解决方案使用
DescriptionAttribute和适当的扩展方法可以读取。public enum BaudRate
{
[描述（115200 kb）]
BR115200 = 7，
]
BR19200 = 4，
[说明（230400 kb）]
BR230400 = 8，
[说明（2400 kb）]
BR2400 = 1 ，
[说明（115200 kb）]
BR38400 = 5，
[说明（4800 kb）]
BR4800 = 2，
[ 57600 kb）]
BR57600 = 6，
[说明（9600 kb）]
BR9600 = 3
}
扩展方法：
public static class EnumExtension
{
///< summary>
///获取枚举的DescriptionAttribute的字符串。
///< / summary>
///< param name =value>需要描述的枚举值。< / param>
///<返回>如果设置了DescriptionAttribute，它返回它的内容。
///否则只是将原始名称作为字符串。< / returns>
public static string描述（this枚举值）
{
if（value == null）
{
throw new ArgumentNullException（value）;
}
string description = value.ToString（）;
FieldInfo fieldInfo = value.GetType（）。GetField（description）;
DescriptionAttribute [] attributes =
（DescriptionAttribute []）
fieldInfo.GetCustomAttributes（typeof（DescriptionAttribute），false）;
if（attributes！= null& attribute.Length> 0）
{
description = attributes [0] .Description;
}
return description;
}
///< summary>
///创建具有给定Enum类的所有键和值的列表
///< / summary>
///< typeparam name =T>必须从类Enum中派生！< / typeparam>
///< return> KeyValuePair和amp; lt; Enum，string& gt;的列表。所有可用的
///给定的枚举的名称和值。< / returns>
public static IList< KeyValuePair< Enum，string>> ToList< T>（）其中T：struct
{
var type = typeof（T）;
if（！type.IsEnum）
{
throw new ArgumentException（T must be an enum）;
}
return（IList< KeyValuePair< Enum，string>>）
Enum.GetValues（type）
.OfType< Enum& b。选择（e => new KeyValuePair< Enum，string>（e，e.Description（）））
.ToArray
}
public static T GetValueFromDescription< T>（string description）其中T：struct
{
var type = typeof（T）
if（！type.IsEnum）
{
throw new ArgumentException（T must be an enum）;
}
foreach（type.GetFields（）中的var字段）
{
var attribute = Attribute.GetCustomAttribute（field，
typeof（DescriptionAttribute） ）as DescriptionAttribute;
if（attribute！= null）
{
if（attribute.Description == description）
{
return（T）field.GetValue空值）;
}
}
else
{
if（field.Name == description）
{
return（T）field.GetValue空值）;
}
}
}
throw new ArgumentOutOfRangeException（description）;
//或返回默认值（T）;
}
}
框：通过调用
var list = EnumExtension.ToList< BaudRate>
myComboBox.DataSource = list;
myComboBox.ValueMember =Key;
myComboBox.DisplayMember =Value;
I have a namespace in which I have declared an enum as follows:
namespace IXMSoft.Business.SDK.Data { using System; public enum BaudRate { BR115200 = 7, BR19200 = 4, BR230400 = 8, BR2400 = 1, BR38400 = 5, BR4800 = 2, BR57600 = 6, BR9600 = 3 } }When I retrieve these values in a combo box, which is in another namespace, using the statement
comboBox1.Items.Add(BaudRate.BR5700);it shows the value as for example
"BR5700"
I want to
remove BR in front and just want to display the value as "5700". What should I do?解决方案use the
DescriptionAttributeand an appropriate extension method to read it out.public enum BaudRate { [Description("115200 kb")] BR115200 = 7, [Description("19200 kb")] BR19200 = 4, [Description("230400 kb")] BR230400 = 8, [Description("2400 kb")] BR2400 = 1, [Description("115200 kb")] BR38400 = 5, [Description("4800 kb")] BR4800 = 2, [Description("57600 kb")] BR57600 = 6, [Description("9600 kb")] BR9600 = 3 }The extension method:
public static class EnumExtension { /// <summary> /// Gets the string of an DescriptionAttribute of an Enum. /// </summary> /// <param name="value">The Enum value for which the description is needed.</param> /// <returns>If a DescriptionAttribute is set it return the content of it. /// Otherwise just the raw name as string.</returns> public static string Description(this Enum value) { if (value == null) { throw new ArgumentNullException("value"); } string description = value.ToString(); FieldInfo fieldInfo = value.GetType().GetField(description); DescriptionAttribute[] attributes = (DescriptionAttribute[]) fieldInfo.GetCustomAttributes(typeof(DescriptionAttribute), false); if (attributes != null && attributes.Length > 0) { description = attributes[0].Description; } return description; } /// <summary> /// Creates an List with all keys and values of a given Enum class /// </summary> /// <typeparam name="T">Must be derived from class Enum!</typeparam> /// <returns>A list of KeyValuePair<Enum, string> with all available /// names and values of the given Enum.</returns> public static IList<KeyValuePair<Enum, string>> ToList<T>() where T : struct { var type = typeof(T); if (!type.IsEnum) { throw new ArgumentException("T must be an enum"); } return (IList<KeyValuePair<Enum, string>>) Enum.GetValues(type) .OfType<Enum>() .Select(e => new KeyValuePair<Enum, string>(e, e.Description())) .ToArray(); } public static T GetValueFromDescription<T>(string description) where T : struct { var type = typeof(T); if(!type.IsEnum) { throw new ArgumentException("T must be an enum"); } foreach(var field in type.GetFields()) { var attribute = Attribute.GetCustomAttribute(field, typeof(DescriptionAttribute)) as DescriptionAttribute; if(attribute != null) { if(attribute.Description == description) { return (T)field.GetValue(null); } } else { if(field.Name == description) { return (T)field.GetValue(null); } } } throw new ArgumentOutOfRangeException("description"); // or return default(T); } }At the and you can simply apply this to your combo box by calling:
var list = EnumExtension.ToList<BaudRate>(); myComboBox.DataSource = list; myComboBox.ValueMember = "Key"; myComboBox.DisplayMember = "Value";
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