Question

我的新应用程序出了问题：

我已将ComboBox的DataSource设置为枚举，因此ComboBox显示枚举的所有成员。好！

但是现在我想更改显示的文本，而不是ComboBox的值。

这是DataSource集：

CbCategory.DataSource = Enum.GetValues(typeof (ConversionCategories.Categorys));

这就是枚举：

public enum Categorys
    {
        Acceleration,
        Area,
        Energy,
        Frequency,
        Length,
        Mass,
        Time,
        Velocity,
        Volume,
    }

现在例如我希望“Velocity”显示为“Speed”，但值必须相同。

P.S：我不使用WPF。

Answer 1

您可以创建一个字典，将每个枚举值映射到显示字符串，并使用该字典作为组合框的数据源：

SortedDictionary<Categorys, string> catergoryDictionary = new SortedDictionary<Categorys, string>
{
    {Categorys.Acceleration, "Acceleration"},
    {Categorys.Area, "Area"},
    {Categorys.Velocity, "Speed"}
};

CbCategory.DataSource = new BindingSource(catergoryDictionary, null);
CbCategory.ValueMember = "Key";
CbCategory.DisplayMember = "Value";

Answer 2

请使用词典。

Dictionary<Categorys, string> catergoryDisplay = new Dictionary<Categorys, string>
    {
        {Categorys.Velocity, "Speed"}
    };

    CbCategory.DataSource = new BindingSource(catergoryDisplay , null);
    CbCategory.ValueMember = "Key";
    CbCategory.DisplayMember = "Value";

请尝试此代码。

Answer 3

如果该值只能转换为Categorys，您可以执行以下操作：

public enum Categorys
{
    Acceleration,
    Area,
    Energy,
    Frequency,
    Length,
    Mass,
    Time,
    Velocity,
    Volume
}

private static readonly string[] DisplayNames = new string[]
{
    "Acceleration",
    "Area",
    "Energy",
    "Frequency",
    "Length",
    "Mass",
    "Time",
    "Speed",
    "Volume"
};

private class CategoryItem
{
    private Categorys Category;
    private string DisplayName;

    public CategoryItem(Categorys category, string display_name)
    {
        Category = category;
        DisplayName = display_name;
    }

    public override string ToString()
    {
        return DisplayName;
    }

    public static implicit operator Categorys(CategoryItem item)
    {
        return item.Category;
    }
}

private void Form1_Load(object sender, EventArgs e)
{
    List<CategoryItem> items = new List<CategoryItem>();
    int i = 0;

    foreach (var category in Enum.GetValues(typeof(Categorys)))
        items.Add(new CategoryItem((Categorys)category, DisplayNames[i++]));

    CbCategory.DataSource = items;
}

然后可以通过以下方式访问该值：

Categorys category = (Categorys)(CategoryItem)CbCategory.SelectedItem;

也许你可以将它包装在getter或类方法中，如：

public Categorys SelectedCategory
{
    get { return (Categorys)(CategoryItem)CbCategory.SelectedItem; }
}

ComboBox值和文本

3 个答案: