# NetHelper
集成了一些常用的方法；
如通用的缓存静态操作类、常用的Wpf的ValueConverters、内置的委托类型、通用的反射加载dll操作类、Wpf的ViewModel、Command、Navigation、Messenger、部分常用UserControls(可绑定的PasswordBox、PlaceHolderTextBox、HighlightTextBlock等)，以及Wpf一些常用的后台数据绑定方法
其他是一些通用的扩展方法类
It integrates some commonly used methods.
Such as the general cache static operation class, the commonly used Wpf ValueConverters, the built-in delegate type, the general reflective loading dll operation class, Wpf's ViewModel, Command, Navigation, Messenger, some commonly used UserControls (bindable PasswordBox, PlaceHolderTextBox, HighlightTextBlock, etc.), and some commonly used background data binding methods of Wpf
Others are some general extension method classes
See other related visual studio extensions:SharpBoxes.Cuts
which provided lots of csharp、xaml useful code snippets Like full property statement with OnPropertyChanged,auto surround with Task.Run(()=>{ });...
public enum Status
{
Horrible,
Bad,
SoSo,
Good,
Better,
Best
}
//similar DisplayName, for custom display name
public enum Status
{
[DescriptionAttribute("This is horrible")]
Horrible,
[DescriptionAttribute("This is bad")]
Bad,
[DescriptionAttribute("This is so so")]
SoSo,
[DescriptionAttribute("This is good")]
Good,
[DescriptionAttribute("This is better")]
Better,
[DescriptionAttribute("This is best")]
Best
}
Command
for WPF, you can use ActionCommand to bind command to button easily.
private string name;
public string Name
{
get => name;
set
{
OnPropertyChanging(name, value);
name = value;
OnPropertyChanged(name, value);
}
}
public IActionCommand UpdateSyncCommand { get; private set; }
UpdateSyncCommand = new ActionCommand(
() =>
{
Thread.Sleep(1000);
this.Name = "James Harden";
},
() => true
);
or, you can use AsyncCommand to bind async command to button easily.
private string name;
public string Name
{
get => name;
set
{
OnPropertyChanging(name, value);
name = value;
OnPropertyChanged(name, value);
}
}
public IAsyncCommand UpdateAsyncCommand { get; private set; }
UpdateAsyncCommand = new AsyncCommand(
async () =>
{
await Task.Delay(1000);
this.Name = "Clay Tomposon";
},
() => true
);
Also, you can use NavigateWithParameterCommand to bind navigate command to button easily.
internal class StudentsViewModel : SharpBoxes.WPFHelpers.ViewModelBase
{
//...
}
internal class TeachersViewModel : SharpBoxes.WPFHelpers.ViewModelBase
{
//...
}
public SharpBoxes.WPFHelpers.ViewModelBase SelectedViewModel
{
get { return selectedViewModel; }
set
{
//若viewmodel被改变，则对应datatemplate的view也会被改变，见app.xaml中定义的对应viewmodel对应view的datatemplate
selectedViewModel = value;
OnPropertyChanged();
}
}
public ICommand NavigateAsyncCommand { get; private set; }
NavigateWithParameterStore<ViewModelBase, string> navigateWithParameterStore =
new NavigateWithParameterStore<ViewModelBase, string>(
GetViewModelByParameter,
(s, vm) => this.SelectedViewModel = vm
);
navigateWithParameterStore.OnCurrentViewModelChangeAfter += (s, vm) =>
{
Console.WriteLine($"Current view model changed to {vm}");
};
this.NavigateAsyncCommand = new NavigateWithParameterCommand<string>(
new NavigateWithParameterService<string, ViewModelBase>(navigateWithParameterStore)
);
private static ViewModelBase GetViewModelByParameter(string s) =>
s switch
{
"Teachers" => new TeachersViewModel(),
"Students" => new StudentsViewModel(),
_ => null
};
For WPF, you can use Messenger to send message between ViewModels or any other objects.
With no param pass
Messenger.Default.RegisterAction(
"The key of the message with no param",
() =>
{
this.Message = "Receive the message with no param";
}
);
//Usage
this.SendAsyncCommand = new AsyncCommand(
() => Messenger.Default.SendAsync("The key of the message with no param")
);
With param pass
Messenger.Default.RegisterAction(
"The key of the message with param",
(p) =>
{
if (p is StringInput input)
{
this.Message = input.Value;
}
}
);
//Usage
var rd = new Random();
this.SendWithParamAsyncCommand = new AsyncCommand(
() =>
Messenger.Default.SendAsync(
"The key of the message with param",
new StringInput($"The value of the message is {rd.Next(1, 100)}")
)
);
Also, you can send a request and get a response, like ManualResetEvent in C#.
Messenger.Default.RegisterFunc(
"The key of the message with in and out param",
(input) =>
{
if (input is StringInput stringInput)
{
this.Message = $"Receive the message with in param :{stringInput.Value}";
}
return new StringOutput("the out value is Happy New Year Too!");
}
);
//Usage
this.RequestAsyncCommand = new AsyncCommand(async () =>
{
var res = await Messenger.Default.RequestAsync(
"The key of the message with in and out param",
new StringInput("Happy New Year!"),
CancellationToken.None
);
if (res is StringOutput stringOutput)
{
SharpBoxes.WPFHelpers.Dialogs.MessageBoxes.Information(stringOutput.Value);
}
});
Navigation
For WPF, you can use navigate command and navigate service to navigate between pages easily.
NavigateWithParameterStore<ViewModelBase, string> navigateWithParameterStore =
new NavigateWithParameterStore<ViewModelBase, string>(
GetViewModelByParameter,
(s, vm) => this.SelectedViewModel = vm
);
navigateWithParameterStore.OnCurrentViewModelChangeAfter += (s, vm) =>
{
Console.WriteLine($"Current view model changed to {vm}");
};
navigateWithParameterStore.OnCurrentViewModelChangeBefore += (s, vm) =>
{
Console.WriteLine($"Current view model changing to {vm}");
};
this.NavigateAsyncCommand = new NavigateWithParameterCommand<string>(
new NavigateWithParameterService<string, ViewModelBase>(navigateWithParameterStore)
);
private static ViewModelBase GetViewModelByParameter(string s) =>
s switch
{
"Teachers" => new TeachersViewModel(),
"Students" => new StudentsViewModel(),
_ => null
};
For WPF, you can use ViewModelBase to implement your viewmodel easily.
internal class MainViewModel : SharpBoxes.ViewModelBase
{
private string name;
public string Name
{
get { return name; }
set
{
name = value;
OnPropertyChanged();
}
}
}
Event Reflection Helper
For C#, you can use EventHelper to get event reflection easily.
Get Event Raise Method And Invoke
public interface INotifyValueChanged
{
event EventHandler<NotifyValueChangedEventArgs> OnNotifyValueChanged;
}
var invokeMethod = instance.GetEventHandlerRaiseMethods("OnNotifyValueChanged", typeof(EventHandler<NotifyValueChangedEventArgs>)).FirstOrDefault();
//invokeMethod.Invoke(this, new object[] { null, myEventArgs });
invokeMethod.Method?.Invoke(
invokeMethod.FieldValue,
[
null,
new NotifyValueChangedEventArgs()
]
);
Custom Input Dialog
For WPF, you can use DialogManager to show custom input dialog easily.
SharpBoxes.WPFHelpers.Dialogs.DialogManager.ShowInputDialog(
"Please input your value.\n"
+ "if input type is integer or double, float, the limited range is 0-100.\n"
+ "try input value that out of range, then will show error message.",
0,
100,
InputType,
out var value,
"Password"
);
SharpBoxes.WPFHelpers.Dialogs.MessageBoxes.Information(
$"Input: {value}",
"Input Dialog Input");
BindablePasswordBox
For WPF, you can use BindablePasswordBox to bind password box easily.
