Question

我正在尝试将参数传递给RoutedEventHandler

中使用的函数

Button start = new Button();
start.Click += new RoutedEventHandler(playSelectedAlarm_Click);

private void playSelectedAlarm_Click(object sender, EventArgs e)
{
    NavigationService.Navigate(new Uri("/AlarmPicker.xaml", UriKind.Relative));
}

我该怎么做？或者有更好的方法吗？

Answer 1

您可以将参数添加到Button的Tag属性中。然后，在事件处理程序中提取它们：

Button start = new Button();
start.Tag = new string[] { "param1", "param2" };
start.Click += new RoutedEventHandler(playSelectedAlarm_Click);

private void playSelectedAlarm_Click(object sender, EventArgs e)
{        
    //extract the parameters and cast to a `string[]`
    var myParameters = (string[])((Button)sender).Tag;
    string p1 = myParameters[0]; //value is "param1"
    string p2 = myParameters[1]; //value is "param2"


    NavigationService.Navigate(new Uri("/AlarmPicker.xaml", UriKind.Relative));
}

Tag属性需要object类型，因此您可以输入参数，集合，字符串等数组。

Answer 2

改变你的：

NavigationService.Navigate(new Uri("/AlarmPicker.xaml", UriKind.Relative));

到

var uri = "/AlarmPicker.xaml?idx=" + url + "&title=" + title);
NavigationService.Navigate(new Uri(uri, UriKind.Relative));

之后，在AlarmPicker.xaml.cs添加此内容：

out string m_Link = string.empty;
out string m_Title = string.empty;
protected override void OnNavigatedTo(System.Windows.Navigation.NavigationEventArgs e)
{
    base.OnNavigatedTo(e);

    NavigationContext.QueryString.TryGetValue("idx", out m_Link);
    NavigationContext.QueryString.TryGetValue("title", out m_Title);

    Console.Writeline("IDX: " + m_link);
    Console.Writeline("TITLE: " + m_Title);
}

加载AlarmPicker.xaml 时称为！
它用于获取传递的值，如查询字符串。

希望这会有所帮助

Window Phone 7 C＃在routedeventhandler中传递参数

2 个答案: