How to bind Dictionary to ListBox in winforms

问题:

It is possible to bind a dictionary to a listbox, keeping in sync between the listbox and the member property?

回答1:

var choices = new Dictionary<string, string>(); 
choices["A"] = "Arthur"; 
choices["F"] = "Ford"; 
choices["T"] = "Trillian"; 
choices["Z"] = "Zaphod"; 
listBox1.DataSource = new BindingSource(choices, null); 
listBox1.DisplayMember = "Value"; 
listBox1.ValueMember = "Key"; 

(Shamelessly lifted from my own blog: Bind a ComboBox to a generic Dictionary.)

This means you can use SelectedValue to get hold of the corresponding dictionary key for the selected item in the ListBox.

回答2:

I think you can use events for that. Whenever something changes in ListBox, an eventHandler method will add/remove same thing from Dictionary.

回答3:

        label1.Text= listBox1.SelectedIndex.ToString();

        if ( listBox1.SelectedItem is KeyValuePair<int,DockStyle>)
        {

            var temp1 = (KeyValuePair<int, DockStyle>)listBox1.SelectedItem;
            label3.Text = temp1.Key.ToString();
            label4.Text = temp1.Value.ToString();


        }