oneway | 易学教程

How to find out whether current method is flagged with IsOneWay

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问题 Is there a way to know whether the currently executing WCF method is a OneWay method? I'm using httpBinding and the question relates to the server side. I searched in properties for OperationContext on MSDN and couldn't find it. EDIT : I used the following check: HttpContext.Current.Response.StatusCode != (int)System.Net.HttpStatusCode.Accepted; In case of OneWay calls the status code will be 202, but it's not a good way. Are there any better ways? 回答1: The WCF way to solve this is to: Create

Angular - How to get input value at ngFor loop with one way binding

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问题 Can you give me a way to get input value at ngFor loop with one way binding? <div *ngFor="let d of dataList"> <input #inputValue type="text" [ngValue]="d.value"> <button *ngIf="!d.open" (click)="d.open = true">change</button> <button *ngIf="d.open" (click)="save(d.id, NEWVALUE); d.open = false;">save</button> <button *ngIf="d.open" (click)="d.open = false">cancel</button> </div>` How can I set NEWVALUE? with two-way binding is easy. but after click cancel, value already changed as I don't

WCF oneway exception faults channel

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问题 I haven't found a clear answer on this. so if there is already a question about this, my bad. I have a WCF service that pushes data via a callback method to connected clients. this callback method is oneway. so everytime there is new data I loop over the connected users and push the data. The problem I have right now is when a client disconnects it throws an error and the channel becomes faulted. I always thought that oneway didn't care if the message arrives at the destination. So if there's

Android AIDL的实现

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AIDL (Android Interface Definition Language) 是一种IDL 语言，用于生成可以在Android设备上两个进程之间进行进程间通信(interprocess communication, IPC)的代码。如果在一个进程中（例如Activity）要调用另一个进程中（例如Service）对象的操作，就可以使用AIDL生成可序列化的参数。【一】AIDL文件的创建： AIDL使用简单的语法来声明接口，描述其方法以及方法的参数和返回值。这些参数和返回值可以是任何类型，甚至是其他AIDL生成的接口。其中对于Java编程语言的基本数据类型 (int, long, char, boolean等),String和CharSequence，集合接口类型List和Map，不需要import 语句。而如果需要在AIDL中使用其他AIDL接口类型，需要import，即使是在相同包结构下。AIDL允许传递实现Parcelable接口的类，需要import. 需要特别注意的是，对于非基本数据类型，也不是String和CharSequence类型的，需要有方向指示，包括in、out和inout，in表示由客户端设置，out表示由服务端设置，inout是两者均可设置。 AIDL只支持接口方法，不能公开static变量。其中AIDL的方法还提供了oneway这个关键字

Calling a task-based asynchronous one way callback method from WCF service

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问题 I have a WCF service which uses a callback contract to notify the clients, similar to this public interface IClientCallback { [OperationContract(IsOneWay = true)] void NotifySomething(); } and the service code calling it similar to this void NotifySomething() { try { this.callback.NotifySomething(); } catch (Exception ex) { // Log the exception and eat it } } Note that by design the callback notification is optional , i.e. nice to have, but not required. That's why it's marked as OneWay and

Calling a task-based asynchronous one way callback method from WCF service

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I have a WCF service which uses a callback contract to notify the clients, similar to this public interface IClientCallback { [OperationContract(IsOneWay = true)] void NotifySomething(); } and the service code calling it similar to this void NotifySomething() { try { this.callback.NotifySomething(); } catch (Exception ex) { // Log the exception and eat it } } Note that by design the callback notification is optional , i.e. nice to have, but not required. That's why it's marked as OneWay and the implementation eats exceptions. Due to some misunderstanding we were thinking that would be enough

How to pass state back to parent in React?

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I have a form that has a submit button. That form calls a function onclick that sets the state of something from false to true. I then want to pass this state back to the parent so that if it is true it renders componentA but if it is false it renders componentB. How would I do that in react? I know I need to use state or props but not sure how to do it. also is this contradicting the one-way flow react principle?? ComponentA code: <form onSubmit={this.handleClick}> handleClick(event) { this.setState({ decisionPage: true }); event.preventDefault(); }; Parent component that controls what it