ListPicker数据绑定和INotifyPropertyChanged
本文关键字:INotifyPropertyChanged 数据绑定 ListPicker | 更新日期: 2023-09-27 18:02:15
所以我有两个ListPickers, Device Type
和Device Name
。
如果我在Device Type
中选择Tablet,我希望Device Name
ListPicker显示Ipad, Dell Venue 8等选项。
如果我在Device Type
中选择Phone,我希望Device Name
的ListPicker显示像Iphone, Samsung Galaxy等选项。
那么我该如何在这两个ListPicker之间进行数据绑定,并实现INotifyPropertyChanged
,以便一个ListPicker中的更改动态反映在另一个ListPicker中?
您可以这样做:
在你的xaml:
<toolkit:ListPicker x:Name="DeviceType" ItemSource="{Binding DeviceTypeList}" SelectedItem="{Binding SelectedDeviceType, Mode=TwoWay}"/>
<toolkit:ListPicker x:Name="DeviceName" ItemSource="{Binding DeviceNameList}" />
在你的代码中:
public class ClassName : NotifyChangements
{
private YourType selectedDeviceType;
public YourType SelectedDeviceType
{
get { return selectedDeviceType; }
set
{
selectedDeviceType = value;
NotifyPropertyChanged("SelectedDeviceType");
MAJDeviceName();
}
}
// Later in code.
public void MAJDeviceName()
{
// Add code here that fill the DeviceNameList according to the SelectedDeviceType.
}
}
对于NotifyChangements类:
using System.ComponentModel;
using System.Runtime.CompilerServices;
public class NotifyChangements : INotifyPropertyChanged
{
public event PropertyChangedEventHandler PropertyChanged;
public void NotifyPropertyChanged(string property)
{
if (PropertyChanged != null)
PropertyChanged(this, new PropertyChangedEventArgs(property));
}
public bool NotifyPropertyChanged<T>(ref T variable, T valeur, [CallerMemberName] string property = null)
{
if (object.Equals(variable, valeur)) return false;
variable = valeur;
NotifyPropertyChanged(property);
return (true);
}
}
您还必须将List<YourType> DeviceNameList
添加为属性,并在该属性的setter中调用NotifyPropertyChanged("DeviceNameList")
,以使其绑定数据。
此外,我将允许您更改变量和类型名称,因为您没有提供任何代码示例!