英文:
description attribute in c# shows the description and the value from enum
问题
I want it to show only the text that is within the description area, how can I do that? Thanks!
我希望它只显示在描述区域内的文本，我该如何做到？谢谢！
英文:
Im trying to present a description of enum and it presents me the description and the value.
i want it to show only the text that is within the description area, how can i do that? thanks!
this is the enum:
[Description("Choclate Bar")] choclateBar,
[Description("Caffe Protein Bar")] CafeProteinBar,
[Description("Vanilla Cookie")] vanillaCookie,
this is the code im using to present the enums in a combobox
enter image description here
and the second picture is how its shows.
enter image description here
i want it to show in the combobox the values that within the description ("Choclate Bar", ...)
答案1
得分: 1
以下是您要翻译的内容：
以下是一个在ComboBox中呈现枚举的示例，其中第一项用于提示用户进行选择。
枚举
public enum BookCategories{[Description("选项")]Select = 0,[Description("太空旅行")]SpaceTravel = 1,[Description("冒险")]Adventure = 2,[Description("流行体育")]Sports = 3,[Description("汽车")]Automobile = 4,[Description("使用C#编程")]Programming = 5}
用于在ComboBox中呈现的模型
public class BookContainer{public Enum Name { get; set; }public string Description { get; set; }// 用于在ComboBox中显示public override string ToString() => Description;}
获取枚举描述的代码
public static class EnumHelper{/// <summary>/// 创建一个KeyValuePair，其中Key是描述，Value是枚举值/// </summary>/// <typeparam name="T">要处理的枚举</typeparam>public static List<KeyValuePair<string, Enum>> GetItemsAsDictionary<T>() =>Enum.GetValues(typeof(T)).Cast<T>().Cast<Enum>().Select(value => new KeyValuePair<string, Enum>((Attribute.GetCustomAttribute(value.GetType().GetField(value.ToString())!,typeof(DescriptionAttribute)) as DescriptionAttribute)!.Description, value)).ToList();public static List<BookContainer> Container<T>(){List<KeyValuePair<string, Enum>> data = GetItemsAsDictionary<T>();return data.Select(category=> new BookContainer() { Name = category.Value, Description = category.Key }).ToList();}}
表单代码，一个ComboBox，两个按钮
public partial class Form1 : Form{public Form1(){InitializeComponent();Shown += OnShown;}private void OnShown(object? sender, EventArgs e){categoriesComboBox.DataSource = EnumHelper.Container<BookCategories>();}private void CurrentButton_Click(object sender, EventArgs e){BookContainer container = (categoriesComboBox.SelectedItem as BookContainer)!;if (Equals(container.Name, BookCategories.Select)){MessageBox.Show("请选择一个项目");}else{MessageBox.Show($"选择是 {container.Name}");}}private void SetCurrentButton_Click(object sender, EventArgs e){// 这里是如何设置需要的选定索引categoriesComboBox.SelectedIndex =categoriesComboBox.FindString(BookCategories.Adventure.ToString());}}
英文:
The following presents an Enum in a ComboBox where the first item is to prompt the user for a selection.
Enum
public enum BookCategories{[Description("Options")]Select = 0,[Description("Space Travel")]SpaceTravel = 1,[Description("Adventure")]Adventure = 2,[Description("Popular sports")]Sports = 3,[Description("Cars")]Automobile = 4,[Description("Programming with C#")]Programming = 5}
Model for presenting in a ComboBox
public class BookContainer{public Enum Name { get; set; }public string Description { get; set; }// for displaying in ComboBoxpublic override string ToString() => Description;}
Code to get descriptions for the Enum
public static class EnumHelper{/// <summary>/// Create a <see cref="KeyValuePair"/> where Key is the description,/// Value the enum value/// </summary>/// <typeparam name="T">enum to work with</typeparam>public static List<KeyValuePair<string, Enum>> GetItemsAsDictionary<T>() =>Enum.GetValues(typeof(T)).Cast<T>().Cast<Enum>().Select(value => new KeyValuePair<string, Enum>((Attribute.GetCustomAttribute(value.GetType().GetField(value.ToString())!,typeof(DescriptionAttribute)) as DescriptionAttribute)!.Description, value)).ToList();public static List<BookContainer> Container<T>(){List<KeyValuePair<string, Enum>> data = GetItemsAsDictionary<T>();return data.Select(category=> new BookContainer() { Name = category.Value, Description = category.Key }).ToList();}}
Form code, a ComboBox, two buttons
public partial class Form1 : Form{public Form1(){InitializeComponent();Shown += OnShown;}private void OnShown(object? sender, EventArgs e){categoriesComboBox.DataSource = EnumHelper.Container<BookCategories>();}private void CurrentButton_Click(object sender, EventArgs e){BookContainer container = (categoriesComboBox.SelectedItem as BookContainer)!;if (Equals(container.Name, BookCategories.Select)){MessageBox.Show("Please make a selection");}else{MessageBox.Show($"Selection is {container.Name}");}}private void SetCurrentButton_Click(object sender, EventArgs e){// here is how to set the selected index if neededcategoriesComboBox.SelectedIndex =categoriesComboBox.FindString(BookCategories.Adventure.ToString());}}
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