数据绑定枚举属性，网格和显示说明 [英] Data bind enum properties to grid and display description

问题描述

这是一个类似的问题如何绑定自定义枚举描述到DataGrid ，但对我来说我有多个属性。

This is a similar question to How to bind a custom Enum description to a DataGrid, but in my case I have multiple properties.

public enum ExpectationResult
{
    [Description("-")]
    NoExpectation,

    [Description("Passed")]
    Pass,

    [Description("FAILED")]
    Fail
}

public class TestResult
{
    public string TestDescription { get; set; }
    public ExpectationResult RequiredExpectationResult { get; set; }
    public ExpectationResult NonRequiredExpectationResult { get; set; }
}

我绑定的BindingList<&的TestResult GT;到一个WinForms DataGridView的（实际上是一个DevExpress.XtraGrid.GridControl，但通用的解决方案将是更广泛地适用）。我想说明出现，而不是枚举名称。我怎样才能做到这一点？ （上有类/枚举/属性没有任何约束。我可以随意改变他们）

I'm binding a BindingList<TestResult> to a WinForms DataGridView (actually a DevExpress.XtraGrid.GridControl, but a generic solution would be more widely applicable). I want the descriptions to appear rather than the enum names. How can I accomplish this? (There are no constraints on the class/enum/attributes; I can change them at will.)

推荐答案

A 的TypeConverter 通常会做的工作;这里的一些代码，为 DataGridView的工作 - 只是在你的代码添加到阅读的描述（通过反射等等 - 我只是使用一个字符串前缀，现在显示自定义代码工作）。

A TypeConverter will usually do the job; here's some code that works for DataGridView - just add in your code to read the descriptions (via reflection etc - I've just used a string prefix for now to show the custom code working).

请注意，您可能希望重写 ConvertFrom 太。该转换器可在类型中指定的或的物业水平（如果你只想要申请一些属性），也可以在运行时应用如果枚举是不是你的控制之下。

Note you would probably want to override ConvertFrom too. The converter can be specified at the type or the property level (in case you only want it to apply for some properties), and can also be applied at runtime if the enum isn't under your control.

using System.ComponentModel;
using System.Windows.Forms;
[TypeConverter(typeof(ExpectationResultConverter))]
public enum ExpectationResult
{
    [Description("-")]
    NoExpectation,

    [Description("Passed")]
    Pass,

    [Description("FAILED")]
    Fail
}

class ExpectationResultConverter : EnumConverter
{
    public ExpectationResultConverter()
        : base(
            typeof(ExpectationResult))
    { }

    public override object ConvertTo(ITypeDescriptorContext context,
        System.Globalization.CultureInfo culture, object value,
        System.Type destinationType)
    {
        if (destinationType == typeof(string))
        {
            return "abc " + value.ToString(); // your code here
        }
        return base.ConvertTo(context, culture, value, destinationType);
    }
}

public class TestResult
{
    public string TestDescription { get; set; }
    public ExpectationResult RequiredExpectationResult { get; set; }
    public ExpectationResult NonRequiredExpectationResult { get; set; }

    static void Main()
    {
        BindingList<TestResult> list = new BindingList<TestResult>();
        DataGridView grid = new DataGridView();
        grid.DataSource = list;
        Form form = new Form();
        grid.Dock = DockStyle.Fill;
        form.Controls.Add(grid);
        Application.Run(form);
    }
}

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