让我说我有这个代码(在Winforms中):
public class SomeClass
{
public string Name { get; set; }
}
public partial class SomeControl : UserControl
{
private SomeClass inClass;
public string MyName { get; set; }
public SomeControl(SomeClass someClass)
{
InitializeComponent();
this.inClass = someClass;
SetupBinding();
}
private void SetupBinding()
{
this.DataBindings.Clear();
this.DataBindings.Add("MyName", this.inClass, "Name");
}
}
如果我将在用户控件之外更改SomeClass.Name的值,则属性MyName永远不会更改。我做错了什么?
谢谢
答案 0 :(得分:0)
SomeClass 必须阻止INotifyPropertyChanged或具有名为 NameChanged 的事件。您可以自己实现它,但我强烈推荐Fody.PropertyChanged项目。
PS:我写了一些扩展方法来创建绑定更容易和重构友好的方式。在你的情况下,它看起来像这样:
this.BindTo(inClass, c => c.MyName , m => m.Name);
方法本身:
public static class BindingExtensions
{
public static Binding BindTo<TControl, TControlProperty, TModel, TModelProperty>(this TControl control, TModel model, Expression<Func<TControl, TControlProperty>> controlProperty, Expression<Func<TModel, TModelProperty>> modelProperty, string format = null)
where TControl : Control
{
var controlPropertyName = ((MemberExpression)controlProperty.Body).Member.Name;
var modelPropertyName = ((MemberExpression)modelProperty.Body).Member.Name;
var formattingEnabled = !string.IsNullOrWhiteSpace(format);
var binding = control.DataBindings.Add(controlPropertyName, model, modelPropertyName, formattingEnabled, DataSourceUpdateMode.OnPropertyChanged);
if (formattingEnabled)
{
binding.FormatString = format;
}
return binding;
}
}