Skip to main content

Angular2 Multiple component - Interaction using @Output and @Output

Lets say you're building multiple components in your control. There must be some interaction that goes on between main component and child components. Lets take a look how we can do that.

Before proceeding further, it is also important to note that property binding - @Output is used to pass data from parent to child. Event binding @Output is to pass data from child to parent.

We are going to build a component that retrieve a list of item from server and display it on a list on main component and when you click on an item, the child will render out more details.

Next lets take a look at what our main component looks like :-

As you can see we have actually used Angular2 directive here called - "stockdetails". Perhaps it is easier to see here :-

[stock]  = is a directive and it must match @Input in our child component.

When we select a item on the list, we update a variable call stockDetail and you can see we are trying to pass it into "stock" directive (which you will see it in the next code snippet).

Here is the stock detail component. We  decorate it with @Input and then it get render into our component's view.

That's all it is!


Popular posts from this blog

Android Programmatically apply style to your view

Applying style to your view (button in this case) dynamically is pretty easy. All you have to do is place the following in your layout folder (res/layout)
Let's call this file : buttonstyle.xml
<?xml version="1.0" encoding="utf-8"?> <selector xmlns:android=""> <item android:state_pressed="true" > <shape> <solid android:color="#449def" /> <stroke android:width="1dp" android:color="#2f6699" /> <corners android:radius="3dp" /> <padding android:left="10dp" android:top="10dp" android:right="10dp" android:bottom="10dp" /> </shape> </item> <item> <shape> <gradient android:startColor="#449def" a…

OpenCover code coverage for .Net Core

I know there are many post out there getting code coverage for .dotnetcore. I'm using opencover to address this needs.

In case, you do no want to use opencover and wanted to stick with vs2015 code coverage, you can try to copy Microsoft.VisualStudio.CodeCoverage.Shim.dll from C:\Program Files (x86)\Microsoft Visual Studio 14.0\Team Tools\Dynamic Code Coverage Tools\coreclr\ and drop it into your project "bin\Debug\netcoreapp1.0" folder.  Please note : you need to be on VS2015 Enterprise to do this. 

To get started, I guess we need to add OpenCover and ReportGenerator for our test projects, as shown in diagram below :-

When nuget packge gets restored, we will have some binaries downloaded to our machine and we going to use this to generate some statistics. I think the biggest issue is to getting those command lines work.

In dotnetcore, we run test project using "dotnet test" (assuming you are in the test project folder - if not please go there)  So we add this …

DataTable does not have AsEnumerable

I have problem locating my AsEnumerable extension method in my DataTabe (System.Data). Thank god for this post by Angel

I was able to find this method once i have added reference to the following assembly.

C:\Program Files\Reference Assemblies\Microsoft\Framework\v3.5\System.Data.DataSetExtensions.dll

Try to do a dummy Build and you should be able to get it.