用枚举说明绑定组合框 [英] Bind Combobox with Enum Description

问题描述

我已经通过Stackoverflow看到了一种简单的方法来用枚举填充组合框：

I have seen through Stackoverflow that there is an easy way to populate a combobox with an Enumeration:

cbTipos.DataSource = Enum.GetValues(typeof(TiposTrabajo));

在我的情况下，我为枚举定义了一些说明：

In my case I have defined some Description for my enumerations:

 public enum TiposTrabajo
    {                  
        [Description("Programacion Otros")] 
        ProgramacionOtros = 1,           
        Especificaciones = 2,
        [Description("Pruebas Taller")]
        PruebasTaller = 3,
        [Description("Puesta En Marcha")]
        PuestaEnMarcha = 4,
        [Description("Programación Control")]
        ProgramacionControl = 5}

这工作得很好，但它显示的是值，而不是描述
我的问题是，我想在组合框中显示枚举的描述（如果它具有描述），或者在没有值的情况下显示值。
如果有必要，我可以为没有说明的值添加说明。

This is working pretty well, but it shows the value, not the description My problem is that I want to show in the combobox the description of the enumeration when it have a description or the value in the case it doesn't have value. If it's necessary I can add a description for the values that doesn't have description. Thx in advance.

推荐答案

尝试以下操作：

cbTipos.DisplayMember = "Description";
cbTipos.ValueMember = "Value";
cbTipos.DataSource = Enum.GetValues(typeof(TiposTrabajo))
    .Cast<Enum>()
    .Select(value => new
    {
        (Attribute.GetCustomAttribute(value.GetType().GetField(value.ToString()), typeof(DescriptionAttribute)) as DescriptionAttribute).Description,
        value
    })
    .OrderBy(item => item.value)
    .ToList();

要使此功能有效，所有值都必须具有说明，否则您将获得NullReference例外。希望有帮助。

In order for this to work, all the values must have a description or you'll get a NullReference Exception. Hope that helps.

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