Disclaimer: I have Angular 16 Installed Globally. and will be installing 17 Locally (To install globally, follow this)
Create a folder in your local drive, say AngularTest.
> mkdir AngularTest
> cd AngularTest
Install your angular version (Make sure while installation you are not using -g at the end of the installation command);
> npm install @angular/cli@ (for any other version)
> npm install @angular/cli (for current version)
Type following command in your AngularTest folder to confirm your version
> ng version
This will list down version for Angular CLI, Node, Package Manager and OS. If Angular is not compatible with Node, you will see a yellow message at the bottom of window. In that case you need to figure out correct node version for Angular.
After the docker installation you have 3 networks by default:
If you start a container by default it will be created inside the bridge (docker0) network.
$ docker run -d jenkins
1498e581cdba jenkins "/bin/tini -- /usr..." 3 minutes ago
The –net=host option is used to make the programs inside the Docker container look like they are running on the host itself, from the perspective of the network. It allows the container greater network access than it can normally get.
Normally you have to forward ports from the host machine into a container, but when the containers share the host’s network, any network activity happens directly on the host machine – just as it would if the program was running locally on the host instead of inside a container.
While this does mean you no longer have to expose ports and map them to container ports, it means you have to edit your Dockerfiles to adjust the ports each container listens on, to avoid conflicts as you can’t have two containers operating on the same host port. However, the real reason for this option is for running apps that need network access that is difficult to forward through to a container at the port level.
For example, if you want to run a DHCP server then you need to be able to listen to broadcast traffic on the network, and extract the MAC address from the packet. This information is lost during the port forwarding process, so the only way to run a DHCP server inside Docker is to run the container as –net=host.
Generally speaking, –net=host is only needed when you are running programs with very specific, unusual network needs.
Lastly, from a security perspective, Docker containers can listen on many ports, even though they only advertise (expose) a single port. Normally this is fine as you only forward the single expected port, however if you use –net=host then you’ll get all the container’s ports listening on the host, even those that aren’t listed in the Dockerfile. This means you will need to check the container closely (especially if it’s not yours, e.g. an official one provided by a software project) to make sure you don’t inadvertently expose extra services on the machine.
To pass object from controller method to controller method use this extension methid;
public static class TempDataExtensions
{
public static void Put<T>(this ITempDataDictionary tempData, string key, T value) where T : class
{
tempData[key] = JsonConvert.SerializeObject(value);
}
public static T Get<T>(this ITempDataDictionary tempData, string key) where T : class
{
object o;
tempData.TryGetValue(key, out o);
return o == null ? null : JsonConvert.DeserializeObject<T>((string)o);
}
}
And, you can use them as follows:
Say objectA is of type ClassA. You can add this to the temp data dictionary using the above mentioned extension method like this:
TempData.Put("key", objectA);
And to retrieve it you can do this:
var value = TempData.Get<ClassA>("key") where value retrieved will be of type ClassA
On Redirect, TempData will become NULL. To solve this, try string test first;
On first controller method, set this;
TempData["error"] = "There is an error"
On a second controller method, get this;
var message = TempData["error"]
if you can see the message in second controller, no need to make any configuration changes. The problem is with your complex object serialization/deserialization
If TempData string (shown above) doesn’t work, then you need to make these configuration changes.
builder.Services.Configure<CookieTempDataProviderOptions>(options =>
{
options.Cookie.Name = "TEMPDATA";
//you have to avoid setting SameSiteMode.Strict here
options.Cookie.SameSite = SameSiteMode.Lax;
options.Cookie.IsEssential = true;
});
We can pass values as query string in RedirectToAction method but we don’t want to show sensitive data in URL. So the alternate is to pass it as TempData that is using session at the backend or simply use Session.
Here is a simple comparison;
Maintains data between
ViewData/ViewBag
TempData
HiddenFields
Session
ControllerToController
NO
YES
NO
YES
ControllerToView
YES
NO
NO
YES
ViewToController
NO
NO
YES
YES
If you like to store/retrieve complex objects between controllers using TempData, use this extension method;
