如何刷新Devexpress gridcontrolitemssource(作为Datatable)在MVVM(WPF)
本文关键字:Datatable MVVM WPF 作为 Devexpress 何刷新 刷新 gridcontrolitemssource | 更新日期: 2023-09-27 18:14:52
我有一个GridControl(Devexpress v13)在视图(WPF)。Datatable在ViewModel中设置值并分配给ItemsSource。但是ItemsSource填充只是初始化。后来Datatable的值改变了,但它不刷新。如何刷新ItemsSource ?
<dxg:GridControl Name="GridControlData" DataSource="{Binding DtCriterias, Mode=TwoWay}" HorizontalAlignment="Left" VerticalAlignment="Top" AutoGenerateColumns="AddNew" Width="400" Height="100">
我希望你明白我的意思。如有任何帮助,我将不胜感激。
提前感谢。
编辑:使用
更改属性 public DataTable DtCriterias {
get { return _dtCriterias; }
set
{
_dtCriterias = value;
Notify(() => DtCriterias);
}
}
protected void Notify(Expression<Func<object>> expression)
{
if (_propertyChangedEvent == null) return;
Notify(GetPropertyName(expression));
}
protected void Notify(string propertyName)
{
if (_propertyChangedEvent != null)
{
_propertyChangedEvent(this, new PropertyChangedEventArgs(propertyName));
}
}
public ObservableCollection<ClientB2B> Clients
{
get
{
return _clients;
}
set
{
if (_clients == value) return;
_clients = value;
OnPropertyChanged(); // This is what you need
}
}
实现这个接口- INotifyPropertyChanged
protected void OnPropertyChanged(PropertyChangedEventArgs e)
{
PropertyChangedEventHandler handler = PropertyChanged;
if (handler != null)
handler(this, e);
}
protected void OnPropertyChanged(string propertyName)
{
OnPropertyChanged(new PropertyChangedEventArgs(propertyName));
}
public event PropertyChangedEventHandler PropertyChanged;
我找到了问题的原因。我正在使用封装,并设置了私有值(_dtCriterias)。因此,Property Changed Event不能工作。
定义:
private DataTable _dtCriterias;
public DataTable DtCriterias {
get { return _dtCriterias; }
set
{
_dtCriterias = value;
Notify(() => DtCriterias);
}
}
当我有问题的数据表集:
_dtCriterias = GetValue().DefaultView.ToTable("FooTable");
解决方案:
DtCriterias = GetValue().DefaultView.ToTable("FooTable");