//set 
comboBox1.DisplayMember = "Value"; 
//to add 
comboBox1.Items.Add(new KeyValuePair("2", "This text is displayed")); 
//to access the 'tag' property 
string tag = ((KeyValuePair< string, string >)comboBox1.SelectedItem).Key; 
MessageBox.Show(tag);

我有同样的问题，我所做的是添加一个新的ComboBox，只有在相同的索引值，然后第一个，然后当我改变主要组合的索引在第二个改变的同时，然后我取第二个组合的值，并使用它。

这是代码:

public Form1()
{
    eventos = cliente.GetEventsTypes(usuario);

    foreach (EventNo no in eventos)
    {
        cboEventos.Items.Add(no.eventno.ToString() + "--" +no.description.ToString());
        cboEventos2.Items.Add(no.eventno.ToString());
    }
}

private void lista_SelectedIndexChanged(object sender, EventArgs e)
{
    lista2.Items.Add(lista.SelectedItem.ToString());
}

private void cboEventos_SelectedIndexChanged(object sender, EventArgs e)
{
    cboEventos2.SelectedIndex = cboEventos.SelectedIndex;
}

您可以使用字典对象，而不是创建自定义类来在组合框中添加文本和值。

在Dictionary对象中添加键和值:

Dictionary<string, string> comboSource = new Dictionary<string, string>();
comboSource.Add("1", "Sunday");
comboSource.Add("2", "Monday");

将源Dictionary对象绑定到Combobox:

comboBox1.DataSource = new BindingSource(comboSource, null);
comboBox1.DisplayMember = "Value";
comboBox1.ValueMember = "Key";

检索键和值:

string key = ((KeyValuePair<string,string>)comboBox1.SelectedItem).Key;
string value = ((KeyValuePair<string,string>)comboBox1.SelectedItem).Value;

完整来源:组合框文本和值

你可以使用泛型类型:

public class ComboBoxItem<T>
{
    private string Text { get; set; }
    public T Value { get; set; }

    public override string ToString()
    {
        return Text;
    }

    public ComboBoxItem(string text, T value)
    {
        Text = text;
        Value = value;
    }
}

使用简单int-Type的示例:

private void Fill(ComboBox comboBox)
    {
        comboBox.Items.Clear();
        object[] list =
            {
                new ComboBoxItem<int>("Architekt", 1),
                new ComboBoxItem<int>("Bauträger", 2),
                new ComboBoxItem<int>("Fachbetrieb/Installateur", 3),
                new ComboBoxItem<int>("GC-Haus", 5),
                new ComboBoxItem<int>("Ingenieur-/Planungsbüro", 9),
                new ComboBoxItem<int>("Wowi", 17),
                new ComboBoxItem<int>("Endverbraucher", 19)
            };

        comboBox.Items.AddRange(list);
    }

这里有更好的解决方案;

Dictionary<int, string> userListDictionary = new Dictionary<int, string>();
        foreach (var user in users)
        {
            userListDictionary.Add(user.Id,user.Name);
        }

        cmbUser.DataSource = new BindingSource(userListDictionary, null);
        cmbUser.DisplayMember = "Value";
        cmbUser.ValueMember = "Key";

检索数据

MessageBox.Show(cmbUser.SelectedValue.ToString());

一个使用DataTable的例子:

DataTable dtblDataSource = new DataTable();
dtblDataSource.Columns.Add("DisplayMember");
dtblDataSource.Columns.Add("ValueMember");
dtblDataSource.Columns.Add("AdditionalInfo");

dtblDataSource.Rows.Add("Item 1", 1, "something useful 1");
dtblDataSource.Rows.Add("Item 2", 2, "something useful 2");
dtblDataSource.Rows.Add("Item 3", 3, "something useful 3");

combo1.Items.Clear();
combo1.DataSource = dtblDataSource;
combo1.DisplayMember = "DisplayMember";
combo1.ValueMember = "ValueMember";

   //Get additional info
   foreach (DataRowView drv in combo1.Items)
   {
         string strAdditionalInfo = drv["AdditionalInfo"].ToString();
   }

   //Get additional info for selected item
    string strAdditionalInfo = (combo1.SelectedItem as DataRowView)["AdditionalInfo"].ToString();

   //Get selected value
   string strSelectedValue = combo1.SelectedValue.ToString();