[英]Bind Combobox with Enum Description
I have seen through Stackoverflow that there is an easy way to populate a combobox with an Enumeration: 我已经通过Stackoverflow了解到有一种简单的方法可以使用Enumeration填充组合框:
cbTipos.DataSource = Enum.GetValues(typeof(TiposTrabajo));
In my case I have defined some Description for my enumerations: 在我的例子中,我为我的枚举定义了一些描述:
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}
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. 这工作得很好,但它显示了值,而不是描述我的问题是我想在组合框中显示枚举的描述,当它有描述时,或者在没有值的情况下显示值。 If it's necessary I can add a description for the values that doesn't have description.
如果有必要,我可以为没有描述的值添加描述。 Thx in advance.
Thx提前。
Try this: 试试这个:
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();
In order for this to work, all the values must have a description or you'll get a NullReference Exception. 为了使其工作,所有值必须具有描述,否则您将获得NullReference异常。 Hope that helps.
希望有所帮助。
Here is what I came up with since I needed to set the default as well. 这是我想出来的,因为我也需要设置默认值。
public static void BindEnumToCombobox<T>(this ComboBox comboBox, T defaultSelection)
{
var list = Enum.GetValues(typeof(T))
.Cast<T>()
.Select(value => new
{
Description = (Attribute.GetCustomAttribute(value.GetType().GetField(value.ToString()), typeof(DescriptionAttribute)) as DescriptionAttribute)?.Description ?? value.ToString(),
Value = value
})
.OrderBy(item => item.Value.ToString())
.ToList();
comboBox.DataSource = list;
comboBox.DisplayMember = "Description";
comboBox.ValueMember = "Value";
foreach (var opts in list)
{
if (opts.Value.ToString() == defaultSelection.ToString())
{
comboBox.SelectedItem = opts;
}
}
}
Usage: 用法:
cmbFileType.BindEnumToCombobox<FileType>(FileType.Table);
Where cmbFileType
is the ComboBox
and FileType
is the enum
. 其中
cmbFileType
是ComboBox
, FileType
是enum
。
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.