/// <summary>
/// 生成Observable的测试代码
/// </summary>
private static async void CreateDemo()
{
// ByCreate
Console.WriteLine($"ByCreate Start... {DateTime.Now.ToLongTimeString()}");
var byCreate = CreateOperate.GetObservableByCreate().Timestamp();
await Task.Delay(TimeSpan.FromSeconds(2));
byCreate.SubscribeConsole("ByCreate");
// ByDefer
var byDefer = CreateOperate.GetObservableByDefer();
byDefer.SubscribeConsole("ByDefer");
// 事件生成
var eventMock = new EventMock();
CreateOperate.GetObservableForEventPattern(eventMock).SubscribeConsole("ForEventPattern");
CreateOperate.GetObservableForEventPatternSimplest(eventMock).SubscribeConsole("ForEventPatternSimplest");
CreateOperate.GetObservableForNotFollowEventPattern(eventMock).SubscribeConsole("ForNotFollowEventPattern");
CreateOperate.GetObservableForMultipleParameters(eventMock).SubscribeConsole("ForMultipleParameters");
CreateOperate.GetObservableForNotArgument(eventMock).SubscribeConsole("ForNotArgument");
eventMock.RaiseEvent();
eventMock.RaiseEvent();
eventMock.RaiseEvent();
// Enumerable 转 Observable
CreateOperate.EnumerableToObservable().SubscribeConsole("Enumerable 转 Observable");
CreateOperate.EnumerableToObservableWithException().SubscribeConsole("抛异常的Enumerable 转 Observable");
CreateOperate.EnumerableToObservableWithConcat()
.SubscribeConsole("Enumerable 转 Observable 后使用 Concat() 拼接多个 Observable");
// Observable 转 Enumerable
var enumerable = CreateOperate.ObservableToEnumerable();
foreach (var item in enumerable)
{
Console.WriteLine(item);
}
// ObservableToDictionary
CreateOperate.ObservableToDictionary()
.Select(x => string.Join(",", x))
.SubscribeConsole("Enumerable 转 Dictionary");
// ObservableToLookup
CreateOperate.ObservableToLookup()
.Select(lookup =>
{
var groups = new StringBuilder();
foreach (var grouping in lookup)
{
groups.Append($"[Key => {grouping.Count()}]");
}
return(groups.ToString());
})
.SubscribeConsole("Enumerable 转 Lookup");
// 循环生成Observable
CreateOperate.GetObservableByLoopWithGenerate().SubscribeConsole("Generate 循环");
CreateOperate.GetObservableByLoopWithRange().SubscribeConsole("Range 循环");
// Using
CreateOperate.GetObservableByResource().SubscribeConsole("Using 读取流");
// 生成简单的Observable
CreateOperate.GetObservableByReturn().SubscribeConsole("Return");
CreateOperate.GetObservableByThrow().SubscribeConsole("Throw");
CreateOperate.GetObservableByNever().SubscribeConsole("Never");
CreateOperate.GetObservableByEmpty().SubscribeConsole("Empty");
}
/// <summary>
/// 没有参数的事件生成 Observable
/// </summary>
/// <param name="eventMock"></param>
/// <returns></returns>
public static IObservable <Unit> GetObservableForNotArgument(EventMock eventMock)
{
return(Observable.FromEvent(h => eventMock.NotArgumentEvent += h, h => eventMock.NotArgumentEvent -= h));
}
/// <summary>
/// 多个参数的事件生成 Observable。
/// </summary>
/// <param name="eventMock"></param>
/// <returns></returns>
public static IObservable <Tuple <int, string> > GetObservableForMultipleParameters(EventMock eventMock)
{
return(Observable.FromEvent <Action <int, string>, Tuple <int, string> >(
handler => (value1, value2) => handler(Tuple.Create(value1, value2)), // 传一个转换参数的委托
h => eventMock.MultipleParameterEvent += h, h => eventMock.MultipleParameterEvent -= h));
}
/// <summary>
/// 从非标准事件模式生成 Observable。
/// </summary>
/// <param name="eventMock"></param>
/// <returns></returns>
public static IObservable <string> GetObservableForNotFollowEventPattern(EventMock eventMock) =>
Observable.FromEvent <Action <string>, string>(h => eventMock.NotFollowEventPatternEvent += h,
h => eventMock.NotFollowEventPatternEvent -= h);
/// <summary> /// 从标准事件模式生成 Observable 的最简化版本，但是这个方法需要传一个魔法数，所以一定要用 nameof 减少Bug。 /// </summary> /// <param name="eventMock"></param> /// <returns></returns> public static IObservable <string> GetObservableForEventPatternSimplest(EventMock eventMock) => Observable.FromEventPattern(eventMock, nameof(eventMock.MessageEvent)).Select(change => "eventRaiseSimplest");
/// <summary>
/// Observable.FromEventPattern<TDelegate, TEventArgs>() 是从标准的事件模式生成 Observable。
/// 1. 标准事件模式是指 public event EventHandler MessageEvent 或者 public event EventHandler<T> MessageEvent 签名的。
/// </summary>
/// <param name="eventMock"></param>
/// <returns></returns>
public static IObservable <string> GetObservableForEventPattern(EventMock eventMock)
{
return(Observable.FromEventPattern <EventHandler, EventArgs>(h => eventMock.MessageEvent += h,
h => eventMock.MessageEvent -= h).Select(change => "eventRaise"));
}