WPF combobox的使用

搭建WPF界面的时候，想用combobox构建一个下拉菜单，搜索的时候看到大多数都是大段代码，逻辑顺序不是很详细，摸索了大概，记录一下方便来者。

拖入combobox控件，控件的属性可以在xmal代码中更改，这里只是用了默认的代码，combobox的绑定在.cs代码中进行。

 <Label Content="Label" Height="28" HorizontalAlignment="Left" Margin="12,239,0,0" Name="label8" VerticalAlignment="Top" />
        <ComboBox Height="23" HorizontalAlignment="Left" Margin="130,239,0,0" Name="My_combobox" VerticalAlignment="Top" Width="120" ItemsSource="{Binding}" SelectionChanged="comboBox1_SelectionChanged" DataContext="{Binding}"></ComboBox>
        <TextBox Height="23" HorizontalAlignment="Left" Margin="130,301,0,0" Name="textBox8" VerticalAlignment="Top" Width="120" TextChanged="textBox8_TextChanged" />

combobox几个相关的属性：

WPF combobox的使用

ItemSource一般绑定list

先定义类

    public class drop_down_list
    {
        public string Name { get; set; }
        public int ID { get; set; }
        public int IDS { get; set; }
    }

然后构建list

            List<drop_down_list> Drop_down_f_g = new List<drop_down_list>();
            Drop_down_f_g.Add(new drop_down_list { Name = "up_up", ID = 0, IDS = 1 });
            Drop_down_f_g.Add(new drop_down_list { Name = "one_up", ID = 1, IDS = 2 });
            Drop_down_f_g.Add(new drop_down_list { Name = "five_up", ID = 2, IDS = 3 });
            Drop_down_f_g.Add(new drop_down_list { Name = "ten_up", ID = 3, IDS = 4 });
            Drop_down_f_g.Add(new drop_down_list { Name = "fifteen_up", ID = 4, IDS = 5 });
            Drop_down_f_g.Add(new drop_down_list { Name = "fifteen_down", ID = 5, IDS = 6 });
            Drop_down_f_g.Add(new drop_down_list { Name = "twentyfive_up", ID = 6, IDS = 7 });
            Drop_down_f_g.Add(new drop_down_list { Name = "thirty_down", ID = 7, IDS = 8 });
            Drop_down_f_g.Add(new drop_down_list { Name = "fourty_down", ID = 8, IDS = 9 });

绑定combobox的数据源

            My_combobox.ItemsSource = Drop_down_f_g;
            My_combobox.DisplayMemberPath = "Name";
            My_combobox.SelectedValuePath = "IDS";
            My_combobox.SelectedIndex = 0;

list的初始化和combobox我都是在mainwindow中进行的

通过comboBox的changed函数实现数据获取

        private void comboBox1_SelectionChanged(object sender, SelectionChangedEventArgs e)
        {
            string test;
            object a;
            a = My_combobox.SelectedValue;
            test = a.ToString();
            textBox8.Text = test;    
        }

WPF combobox的使用

获取到name对应的ID.