SearchBar和Xamarin.Form

Question

正在开发一个拥有SearchBar的XF项目。 XAML宣言如下所示。

$scope.GetAngValue = function (value) {
    var Matches = value.match(/\<(.*?)\>/);
    if (Matches) {
        $scope.Result = Matches[1];
    }
}

在ViewModel，我有以下声明的

<SearchBar Placeholder="Result" Text="{Binding SearchedCustomer,Mode=TwoWay}" 
                SearchCommand="{Binding SearchCustomerCommand}"></SearchBar>

我还在构造函数中创建了SearchCustomerCommand，如下所示

    private string _SearchedCustomer;
    public string SearchedCustomer
    {
        get { return _SearchedCustomer; }
        set { SetProperty(ref _SearchedCustomer, value); }
    }

    public DelegateCommand SearchCustomerCommand { get; set; }

    private ObservableCollection<CustomerModel> _CustomerList;
    public ObservableCollection<CustomerModel> CustomerList
    {
        get
        {
            if (_CustomerList == null)
                FillCustomerDetails();
            return _CustomerList;
        }
        set { SetProperty(ref _CustomerList, value); }
    }

    private void ExecuteSearchCustomerCommand()
    {
        var tempRecords = _CustomerList.Where(c => c.ReferenceText.Contains(SearchedCustomer));
        CustomerList.Clear();
        foreach (var item in tempRecords)
        {
            CustomerList.Add(item);
        }
    }

当我输入SearchBar时，SearchedCustomer字段会被更改，但是，Command SearchCustomerCommand不会被执行。

有人可以帮助我确定我在这里做错了吗？