如何将 C# 7.0 元组类型值的集合绑定到 System.Windows.Forms.Listbox 并将显示成员设置为元素之一?

问题描述

我有一个 System.Windows.Forms.Listbox 和我创建的一组元组类型值.也就是说，

我怎样才能做到这一点?

解决方案

Ivan 的回答，绝对描述了案例.作为解决方法，您可以使用 ListBox 的Format 事件以显示 name 提交:

private void listBox1_Format(object sender, ListControlConvertEventArgs e){e.Value = (((string name, int ID))e.ListItem).name;}

I have a System.Windows.Forms.Listbox and a collection of tuple type values I've created. That is, the new tuple type introduced in C# 7.0. I'm trying to bind the collection to the Listbox and set the DisplayMember to one of the elements in the tuple. Here's an example:

var l = new List<(string name, int ID)>()
{
    ("Bob", 1),
    ("Mary", 2),
    ("Beth", 3)
};

listBox1.DataSource = l;
listBox1.DisplayMember = "name";

That doesn't work, though. With the older-style Tuple<T> you could supposedly do what's described in this answer:

listBox1.DisplayMember = "Item1";
listBox1.ValueMember = "Item3";   // optional

That doesn't work either. Here's what I'm seeing in both cases:

How can I accomplish this?

解决方案

Ivan's answer, definitely describes the case. As a workaround you can use Format event of ListBox to show name filed:

private void listBox1_Format(object sender, ListControlConvertEventArgs e)
{
    e.Value = (((string name, int ID))e.ListItem).name;
}

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