C# WPF-在标签中显示命令行参数
我有一个wpf应用程序,需要用几个命令行参数调用它。我如何将它们显示在我为此而放在窗口中的标签中? 我试图实现数据绑定,但没有成功,-变量被正确读取和分配,但由于一些荒谬的原因,没有显示在屏幕上,在我想要的标签中。 代码如下:C# WPF-在标签中显示命令行参数,c#,wpf,label,args,C#,Wpf,Label,Args,我有一个wpf应用程序,需要用几个命令行参数调用它。我如何将它们显示在我为此而放在窗口中的标签中? 我试图实现数据绑定,但没有成功,-变量被正确读取和分配,但由于一些荒谬的原因,没有显示在屏幕上,在我想要的标签中。 代码如下: public partial class MainWindow : Window { public Notification _notif = new Notification(); public MainWindow() { In
public partial class MainWindow : Window
{
public Notification _notif = new Notification();
public MainWindow()
{
InitializeComponent();
this.DataContext = new Notification();
}
protected override void OnClosed(EventArgs e)
{
base.OnClosed(e);
App.Current.Shutdown();
}
}
public partial class App : Application
{
protected override void OnStartup(StartupEventArgs e){
if (e.Args.Length >= 4)
{
MainWindow mainWindow = new MainWindow();
Label count_label = (Label)mainWindow.FindName("count");
count_label.DataContext = mainWindow._notif;
System.Diagnostics.Debug.WriteLine(mainWindow._notif.count + " - notif.count");
// bind the Date to the UI
count_label.SetBinding(Label.ContentProperty, new Binding("count")
{
Source = mainWindow._notif,
Mode = BindingMode.TwoWay
});
//assigning values to the labels
System.Diagnostics.Debug.WriteLine(count_label.Content + " - content of the label 'count'");
mainWindow._notif.count = e.Args[0];
System.Diagnostics.Debug.WriteLine(e.Args[0] + " is the argument n. 0");
System.Diagnostics.Debug.WriteLine(mainWindow._notif.count + " - notif.count");
System.Diagnostics.Debug.WriteLine(count_label.Content + "-------------------");
System.Diagnostics.Debug.WriteLine(count_label.Content + " - content of the label 'count'");
mainWindow._notif.count = "1234";
System.Diagnostics.Debug.WriteLine(mainWindow._notif.count + " - notif.count");
System.Diagnostics.Debug.WriteLine(count_label.Content + " - content of the label 'count'");
}
}
}
public class Notification : INotifyPropertyChanged
{
private string _count;
public string count {
get {
return _count;
}
set {
_count = value;
OnPropertyChanged("count");
}
}
#region INotifyPropertyChanged Members
public event PropertyChangedEventHandler PropertyChanged;
protected virtual void OnPropertyChanged(string propertyName)
{
if (PropertyChanged != null)
{
PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
}
}
#endregion
}
在这里,您可以看到xaml中的一个片段:
<Label x:Name="count" Content="{Binding count}" HorizontalAlignment="Center" Margin="0,10,486,0" VerticalAlignment="Top" RenderTransformOrigin="-2.895,-0.769" Height="80" Width="145" FontFamily="Arial" FontSize="64" HorizontalContentAlignment="Center"/>
非常感谢。该示例演示了如何在标签中显示参数 这是应用程序的入口点:
public partial class App : Application
{
protected override void OnStartup(StartupEventArgs e)
{
var argumentsInfo = BuildArgumentsInfo(e.Args);
var viewModel = new MainWindowViewModel(argumentsInfo);
var window = new MainWindow(viewModel);
window.Show();
}
private string BuildArgumentsInfo(string[] args)
{
return args.Any()
? args.Aggregate((arg1, arg2) => arg1 + " " + arg2)
: "No arguments";
}
}
这是视图模型(视图的数据上下文):
这是视图(代码隐藏):
这是视图中的标签(XAML):
重要您必须删除
StartupUri=“MainWindow.xaml
来自App.xaml文件,因为MainWindow
是从代码隐藏启动的。应用程序OnStartUp方法中的MainWindow实例与App.xaml中指定的StartupUri不相同。例如,要将参数传递给MainWindow,必须在MainWindow中创建一个属性,例如,名为CommandArgs的列表属性,在创建MainWindow对象后,循环Args列表并将其内容添加到CommandArgs列表中
public interface IMainWindowViewModel
{
string Arguments { get; set; }
}
public class MainWindowViewModel : IMainWindowViewModel, INotifyPropertyChanged
{
private string _arguments;
public MainWindowViewModel(string argumentsInfo)
{
Arguments = argumentsInfo;
}
public string Arguments
{
get { return _arguments; }
set
{
_arguments = value;
RaisePropertyChanged("Arguments");
}
}
public event PropertyChangedEventHandler PropertyChanged = delegate {};
private void RaisePropertyChanged(string propertyName)
{
PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
}
}
public partial class MainWindow : Window
{
public MainWindow(IMainWindowViewModel viewModel)
{
InitializeComponent();
DataContext = viewModel;
}
}
<Label Content ="{Binding Arguments}"></Label>