小编kbe*_*l2k的帖子

我有一个绑定到数据源的ComboBox但它不会更新绑定,直到控件失去焦点.如何在所选项目更改时获取更新绑定？在下面的屏幕截图中,我希望标签立即更新以反映新的选择.

一些代码:

public enum MyEnum
{
  First,
  Second
}

public class MyData
{
  public String Name { get; set; }
  public MyEnum MyEnum { get; set; }
}  

样品表格:

public SampleForm()
{
  InitializeComponent ();   
  MyData data = new MyData () { Name = "Single Item" };
  this.bindingSource1.DataSource = data;
  this.comboBox1.DataSource = Enum.GetValues (typeof (MyEnum));
  this.label2.DataBindings.Add ("Text", this.bindingSource1, "MyEnum", true, DataSourceUpdateMode.OnPropertyChanged);
  this.comboBox1.DataBindings.Add (new System.Windows.Forms.Binding ("SelectedItem", this.bindingSource1, "MyEnum", true));
  this.comboBox1.DataBindings.Add (new System.Windows.Forms.Binding ("SelectedValue", this.bindingSource1, "MyEnum", true));
}