Fork me on Gitee

WPF中ComboBox控件绑定键值对操作

WPF中下拉框将键值对作为其数据源的具体操作。本实例以枚举类型以及枚举特性描述字符串生成键值对来进行。

 

namespace ViewC

{
/// <summary>
/// View.xaml 的交互逻辑
/// </summary>
public partial class View : Window
{

private EnumType_enumType= EnumType.B;

public View()
{
  InitializeComponent();
  InitialComBox();
}


private void InitialComBox()
{
  Dictionary<EnumType, string> keyValues = new Dictionary<EnumType, string>();
  var pro = typeof(EnumType).GetFields();//字段值
  for (int i = 0; i < pro.Count(); i++)
  {
    if (pro[i].FieldType.IsEnum)//枚举类型
    {
      var descrips = (DescriptionAttribute[])pro[i].GetCustomAttributes(typeof(DescriptionAttribute), false);//特性描述
      if (descrips.Length < 0) continue;
      var key = (EnumType)typeof(EnumType).InvokeMember(pro[i].Name, System.Reflection.BindingFlags.GetField, null, null, null);//根据枚举名称得到相应枚举值
      keyValues.Add(key, descrips[0].Description);
    }
  }
  cmbControlType.ItemsSource = keyValues;
  cmbControlType.DisplayMemberPath = "Value";
  cmbControlType.SelectedValuePath = "Key";
}

private void Window_Loaded(object sender, RoutedEventArgs e)
{
  //this.cmbControlType.SelectedValue = _controlStepType;//直接赋值selectvalue属性不会触发selectchanged事件
  this.cmbControlType.SelectedIndex = 0;
}

private void CmbControlType_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
  var controlType = (EnumType)this.cmbControlType.SelectedValue;
  //DoSomething

  MessageBox.Show(controlType .ToString());

}

}

public enum EnumType
{
  /// <summary>
  /// AA
  /// </summary>
  [Description("AA")]
  A,

  /// <summary>
  /// BB
  /// </summary>
  [Description("BB")]
  B,

  /// <summary>
  /// CC
  /// </summary>
  [Description("CC")]
  C,

}
}

posted @ 2019-07-09 20:39  VueDi  阅读(594)  评论(0编辑  收藏