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   源码介绍

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msdn说： DisplayMember is set to the comboBox control, it uses the default ToString of the object,

public class Person
{
    public int Id { get; set; }
    public string Name { get; set; }
    public string Lastname { get; set; }

    public override string ToString()
    {
        return String.Format("{0} {1}", Name, Lastname);
    }
}


private void button2_Click(object sender, EventArgs e)
{
    	var people = LoadSamplePeople();
	//.DisplayMember is set to the comboBox control, it uses the default ToString of the object,
	comboBox1.ValueMember = "Id";
    	comboBox1.DataSource = people;
}

private IEnumerable<Person> LoadSamplePeople()
{
    return new List<Person>()
    {
        new Person(){ Id = 1, Name = "Sergio", Lastname = "Tapia" },
        new Person(){ Id = 2, Name = "Daniel", Lastname = "Tapia" }
    };
}