在xaml MVVM模式中绑定进度条

Question

I am trying to implement a progress bar such that when I click on a search button, I need it to pop up. This is what I wrote, but for some reasons it shows up all the time. Any reply will be very appreciated.

The following is what I have in the xaml document:

<ProgressBar Name="searchProgressBar" IsIndeterminate="True" Width="200" Margin="10,10,0,0" Visibility="{Binding IsSearchbarVisible, UpdateSourceTrigger=PropertyChanged}"/>

And this is what I have in the VM.cs class:

private Visibility isSearchBarVisible = Visibility.Collapsed;
public Visibility IsSearchBarVisible
{
    get { return isSearchBarVisible; }
    set
    {
        isSearchBarVisible = value;
        OnPropertyChanged("IsSearchBarVisible");
    }
}

public ICommand OrderSearch
{
    get
    {
        if (_orderSearch == null)
        {
            _orderSearch = new RelayCommand(param =>
            {
                IsSearchBarVisible = Visibility.Visible;
                Console.WriteLine(isSearchBarVisible);
                int orderID;
                if(Int32.TryParse(param.ToString(), out orderID))
                    ShowMainOrderDetails(orderID);

                IsSearchBarVisible = Visibility.Collapsed;
                Console.WriteLine(isSearchBarVisible);
            });
        }
        return _orderSearch;
    }
}

Answer 1

绑定是xaml IsSearchbarVisible（b小）和视图模型IsSearchBarVisible（B是大写）中的问题

Answer 2

Please try this:

private ICommand _onOrderSearchClickCommand;
public ICommand OnOrderSearchClickCommand
{
    get
    {
        if (_onOrderSearchClickCommand != null) return _onOrderSearchClickCommand;
            _onOrderSearchClickCommand = new RelayCommand(OrderSearchButtonClick);
        return _onOrderSearchClickCommand;
    }
}
public void OrderSearchClick(object sender)
{
    IsSearchBarVisible = Visibility.Visible;
    Console.WriteLine(isSearchBarVisible);
    int orderID;
    if(Int32.TryParse(param.ToString(), out orderID))
        ShowMainOrderDetails(orderID);
}

And in the end of your method ShowMainOrderDetails(orderID) add in the end

IsSearchBarVisible = Visibility.Hidden;