我喜欢fab的答案，但不想为我的情况使用字典，所以我替换了一个元组列表。

// set up your data
public static List<Tuple<string, string>> List = new List<Tuple<string, string>>
{
  new Tuple<string, string>("Item1", "Item2")
}

// bind to the combo box
comboBox.DataSource = new BindingSource(List, null);
comboBox.ValueMember = "Item1";
comboBox.DisplayMember = "Item2";

//Get selected value
string value = ((Tuple<string, string>)queryList.SelectedItem).Item1;

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();

//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);

using (SqlConnection con = new SqlConnection(insertClass.dbPath))
{
    con.Open();
    using (SqlDataAdapter sda = new SqlDataAdapter(
    "SELECT CategoryID, Category FROM Category WHERE Status='Active' ", con))
    {
        //Fill the DataTable with records from Table.
        DataTable dt = new DataTable();
        sda.Fill(dt);
        //Insert the Default Item to DataTable.
        DataRow row = dt.NewRow();
        row[0] = 0;
        row[1] = "(Selecione)";
        dt.Rows.InsertAt(row, 0);
        //Assign DataTable as DataSource.
        cboProductTypeName.DataSource = dt;
        cboProductTypeName.DisplayMember = "Category";
        cboProductTypeName.ValueMember = "CategoryID";
    }
}             
con.Close();

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());

这类似于其他一些答案，但是很紧凑，如果已经有一个列表，就避免了转换到字典。

给定一个窗口窗体上的ComboBox“ComboBox”和一个具有字符串类型属性Name的类SomeClass，

List<SomeClass> list = new List<SomeClass>();

combobox.DisplayMember = "Name";
combobox.DataSource = list;

这意味着SelectedItem是list中的SomeClass对象，并且组合框中的每个项目将使用其名称显示。