c# - 如何在 WinForms 中将字典绑定(bind)到组合框？

Question

我正在寻找一种将字典绑定(bind)到组合框的方法

这样当我更新组合框的字典时，它会自动将更改反射(reflect)回 UI。

现在我只能填充组合框，但是一旦我更新了字典，组合框就没有任何反射(reflect)。

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，即调用 combo.DataSource = new BindingSource(menuItems, null); 来刷新我的 UI。

Answer 1

Dictionary确实没有属性Key和 Value .使用 List<KeyValuePair<string,string>>反而。此外，您需要调用 ResetBindings()让它工作。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);
    }