C# 在Silverlight中同步填充自定义控件的DependencyProperties
我有一个Silverlight自定义控件,它有两个属性;文本和Id。我已经根据下面的代码为它们创建了DependencyPropertiesC# 在Silverlight中同步填充自定义控件的DependencyProperties,c#,silverlight,custom-controls,dependency-properties,C#,Silverlight,Custom Controls,Dependency Properties,我有一个Silverlight自定义控件,它有两个属性;文本和Id。我已经根据下面的代码为它们创建了DependencyProperties public static readonly DependencyProperty TextProperty = DependencyProperty.Register("Text", typeof(string), typeof(LookupControl), new PropertyMetadata(NotifyPropertyChanged)); p
public static readonly DependencyProperty TextProperty = DependencyProperty.Register("Text", typeof(string), typeof(LookupControl), new PropertyMetadata(NotifyPropertyChanged));
public static readonly DependencyProperty IdProperty = DependencyProperty.Register("Id", typeof(Guid?), typeof(LookupControl), new PropertyMetadata(NotifyPropertyChanged));
public event PropertyChangedEventHandler PropertyChanged;
public static void NotifyPropertyChanged(object sender, DependencyPropertyChangedEventArgs args)
{
var control = sender as LookupControl;
if (control != null && control.PropertyChanged != null)
{
control.PropertyChanged(control, new PropertyChangedEventArgs("Text"));
}
}
public Guid? Id
{
get { return (Guid?)GetValue(IdProperty); }
set { SetValue(IdProperty, value); }
}
public string Text
{
get { return (string)GetValue(TextProperty); }
set { SetValue(TextProperty, value); }
}
在控件方法中,首先填充Id,然后填充文本。我的问题是,当我绑定到此控件上的文本和Id时,我希望同步填充它们的数据,以便在任一属性上触发PropertyChanged事件时,它们都有更新的数据
此时,我捕捉到Id已更改的时间,执行一些处理,如果需要,我将文本设置为新值。但是一旦完成了对Id的一次性更改,那么在我已经将其更改回其他内容之后,控制方法将继续并填充文本 Cold是否保存值并仅在同时具有这两个值时进行设置
private Guid? id;
private string text;
public Guid?Id
{
get { return id; }
set {
id = value;
TrySetValue();
}
}
public string Text
{
get { return text; }
set { text = value;
TrySetValue()}
}
private void TrySetValue()
{
if (id != null && text != null)
{
SetValue(IdProperty, id);
SetValue(TextProperty, text);
}
}
是否保存值并仅在两者都有时设置
private Guid? id;
private string text;
public Guid?Id
{
get { return id; }
set {
id = value;
TrySetValue();
}
}
public string Text
{
get { return text; }
set { text = value;
TrySetValue()}
}
private void TrySetValue()
{
if (id != null && text != null)
{
SetValue(IdProperty, id);
SetValue(TextProperty, text);
}
}