MVVM 基金会：断言失败错误：属性名称无效
我刚刚开始使用 MVVM Foundation。我得到
我的代码如下：
StartViewModel
class StartViewModel : ObservableObject
{
public StartViewModel() {
_counter = 0;
}
public ICommand IncrementCommand
{
get { return _incrementCommand ?? (_incrementCommand = new RelayCommand(() => ++Counter)); }
}
protected int Counter {
get { return _counter; }
set {
_counter = value;
base.RaisePropertyChanged("Counter");
}
}
protected int _counter;
protected RelayCommand _incrementCommand;
}
StartView
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="50*" />
<RowDefinition Height="250*" />
</Grid.RowDefinitions>
<Button Content="Increment" Grid.Row="0" Command="{Binding IncrementCommand}" />
<TextBlock Padding="5" Text="{Binding Counter}" Grid.Row="1" />
</Grid>
什么代码有问题吗？当我尝试单击增量按钮时出现错误
i am just getting started with MVVM Foundation. I am getting
my codes below:
StartViewModel
class StartViewModel : ObservableObject
{
public StartViewModel() {
_counter = 0;
}
public ICommand IncrementCommand
{
get { return _incrementCommand ?? (_incrementCommand = new RelayCommand(() => ++Counter)); }
}
protected int Counter {
get { return _counter; }
set {
_counter = value;
base.RaisePropertyChanged("Counter");
}
}
protected int _counter;
protected RelayCommand _incrementCommand;
}
StartView
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="50*" />
<RowDefinition Height="250*" />
</Grid.RowDefinitions>
<Button Content="Increment" Grid.Row="0" Command="{Binding IncrementCommand}" />
<TextBlock Padding="5" Text="{Binding Counter}" Grid.Row="1" />
</Grid>
whats wrong with the code? the error appears when i try click the Increment button
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在 RaisePropertyChanged 行上将基数更改为此。
基类没有名为 Counter 的属性
编辑：也许是因为您的属性受到保护而不是公共
MVVM Foundation 中的 ObservableObject 中的注释提到它正在验证公共属性
change base to this on the RaisePropertyChanged line.
The base class does not have a property called Counter
EDIT: Perhaps it is because you property is protected not public
The comments in ObservableObject in MVVM Foundation mentions that it is verifying for public property