如何在 WinForms 中将字典绑定到 ComboBox？

Question

我正在寻找一种将字典绑定到 ComboBox 的方法

这样当我更新字典组合框时，它会自动将更改反映回 UI。

现在我只能填充组合框，但是一旦我更新了字典，就没有任何反映到组合框。

Dictionary<String,String> menuItems = new Dictionary<String,String>(){{"1","one"},{"2","two"}};
combo.DataSource = new BindingSource(menuItems, null);
combo.DisplayMember = "Value";
combo.ValueMember = "Key";
menuItems.Add("ok", "success"); // combobox doesn't get updated

==更新==

目前我有一个解决方法是调用combo.DataSource = new BindingSource(menuItems, null);刷新我的 UI。

Answer 1

Dictionary并没有真正的属性Key和Value. 使用List<KeyValuePair<string,string>>来代替。此外，您需要调用ResetBindings()它才能工作。见下文：

    private void Form1_Load(object sender, EventArgs e)
    {
        //menuItems = new Dictionary<String, String>() { { "1", "one" }, { "2", "two" } };
        menuItems = new List<KeyValuePair<string,string>>() { new KeyValuePair<string, string>("1","one"), new KeyValuePair<string, string>("2","two") };

        bs = new BindingSource(menuItems, null);

        comboBox1.DataSource = bs;
        comboBox1.DisplayMember = "Value";
        comboBox1.ValueMember = "Key";
    }

    private void button1_Click(object sender, EventArgs e)
    {
        //menuItems.Add("3","three");
        menuItems.Add(new KeyValuePair<string, string>("3", "three"));
        bs.ResetBindings(false);
    }