Window Phone 7 C#在routedeventhandler中传递参数
本文关键字:参数 routedeventhandler Phone Window | 更新日期: 2023-09-27 17:58:27
我正试图将参数传递给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?
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、字符串等的数组。
更改您的:
NavigationService.Navigate(new Uri("/AlarmPicker.xaml", UriKind.Relative));
至
var uri = "/AlarmPicker.xaml?idx=" + url + "&title=" + title);
NavigationService.Navigate(new Uri(uri, UriKind.Relative));
之后,在您的AlarmPicker.xaml.cs
中添加以下内容:
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);
}
当您加载AlarmPicker.xaml时,它被称为
它用于获取传递的值,就像查询字符串一样。
希望这对有帮助