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如何将列表绑定到组合框？ （的Winforms）

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我想将绑定源连接到类对象列表，然后将对象值连接到组合框，任何人都可以建议如何操作它

public class Country
    {
        public string Name { get; set; }
        public IList<City> Cities { get; set; }

        public Country()
        {
            Cities = new List<City>();
        }
    }

是我的类，我想将其名称字段绑定到绑定源，然后可以与组合框关联

c# winforms data-binding combobox

6 回答

  • 19

    尝试这样的事情：

    yourControl.DataSource = countryInstance.Cities;

    如果您使用的是WebForms，则需要添加以下行：

    yourControl.DataBind();
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  • 0

    当你指的是一个组合框时，我想要使用双向数据绑定（如果有的话，请查看使用 BindingList ）

    public class Country
{
    public string Name { get; set; }
    public IList<City> Cities { get; set; }
    public Country(string _name)
    {
        Cities = new List<City>();
        Name = _name;
    }
}

    List<Country> countries = new List<Country> { new Country("UK"), 
                                     new Country("Australia"), 
                                     new Country("France") };

bindingSource1.DataSource = countries;

comboBox1.DataSource = bindingSource1.DataSource;

comboBox1.DisplayMember = "Name";
comboBox1.ValueMember = "Name";
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  • 21
    public MainWindow(){
    List<person> personList = new List<person>();

    personList.Add(new person { name = "rob", age = 32 } );
    personList.Add(new person { name = "annie", age = 24 } );
    personList.Add(new person { name = "paul", age = 19 } );

    comboBox1.DataSource = personList;
    comboBox1.DisplayMember = "name";

    comboBox1.SelectionChanged += new SelectionChangedEventHandler(comboBox1_SelectionChanged);
}


void comboBox1_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
    person selectedPerson = comboBox1.SelectedItem as person;
    messageBox.Show(selectedPerson.name, "caption goes here");
}

    繁荣 .

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  • 0

    如果您使用的是ToolStripComboBox，则不会公开DataSource（.NET 4.0）：

    List<string> someList = new List<string>();
someList.Add("value");
someList.Add("value");
someList.Add("value");

toolStripComboBox1.Items.AddRange(someList.ToArray());
    回复于
  • -2

    对于背景，有两种方法可以使用ComboBox / ListBox

    1）将Country对象添加到Items属性并检索Country as Selecteditem . 要使用它，您应该覆盖Country的ToString .

    2）使用DataBinding，将DataSource设置为IList（List <>）并使用DisplayMember，ValueMember和SelectedValue

    对于2），您首先需要一个国家列表

    // not tested, schematic:
List<Country> countries = ...;
...; // fill 

comboBox1.DataSource = countries;
comboBox1.DisplayMember="Name";
comboBox1.ValueMember="Cities";

    然后在SelectionChanged中，

    if (comboBox1.Selecteditem != null)
{
   comboBox2.DataSource=comboBox1.SelectedValue;

}
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  • 136
    public class Country
    {
        public string Name { get; set; }
        public IList<City> Cities { get; set; }

        public Country()
        {
            Cities = new List<City>();
        }
    }

    public class City { public string Name { get; set; } }

List<Country> Countries = new List<Country>
        {
            new Country
            {
                Name = "Germany",
                Cities =
                {
                    new City {Name = "Berlin"},
                    new City {Name = "Hamburg"}
                }
            },
            new Country
            {
                Name = "England",
                Cities =
                {
                    new City {Name = "London"},
                    new City {Name = "Birmingham"}
                }
            }
        };

        bindingSource1.DataSource = Countries;
        member_CountryComboBox.DataSource = bindingSource1.DataSource;
        member_CountryComboBox.DisplayMember = "Name";
        member_CountryComboBox.ValueMember = "Name";

    这是我现在使用的代码

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