[HttpPost]
//[ServiceFilter(typeof(CustomAuthenticationFilter))]
[Route(“get_all_products”)]
public async Task Get_All_Products([FromBody] Get_All_Products_Input ObjClass)
{
if (ObjClass == null)
{
return this.BadRequestCustom(ObjClass, null, _logger);
}
else
{
var result = await _settingsRepo.Get_All_Products(ObjClass);
if (result == null)
{
return this.NotFoundCustom(ObjClass, null, _logger);
}
else
{
List<Get_All_Products_Output> item = result.Cast<Get_All_Products_Output>().ToList();
if (item.Count > 0)
return this.OkCustom(ObjClass, result, _logger);
else
return this.Fail(ObjClass, result, _logger);
}
}
}
[HttpPost] - This line is using what is called attribute decoration. Basically, this is saying that this API endpoint is only accessible via a HTPP POST request.
//[ServiceFilter(typeof(CustomAuthenticationFilter))] This attribute is commented out, which means that it isn’t actually doing anything. What would it normally do? In ASP.NET you have something known as filters, and in simple terms these are something that a request will go through before the actual code is run (any sometimes after). So in this case, the code is going to go through the CustomAuthenticaionFilter; as I can’t see the code for it I obviously can’t say what it is doing but based off the name it is making sure any requests have the right authentication.
[Route(“get_all_products”)] This is another attribute. This one is giving the relative URI of the API endpoint. I.e. if the base URI was https://www.myapi.com to access this endpoint you would need to send the request to
https://www.myapi.com/get_all_products`. Just as a note, it’s a rubbish name for the endpoint.
public async Task Get_All_Products([FromBody] Get_All_Products_Input ObjClass) This is defining method that will contain the code to run when a HTTP request is made to it. I’m going to skip the public access modifier because it doesn’t really matter here. async means that the code will be run asynchronously. Going into what asynchronous code is, is a whole subject on it’s own. Task is the return type, again this is to do with asynchronous code, and as I said, asynchronous code is a whole complex subject to research and understand on its own. Get_All_Products( This is the name of the method and how the code will be called. [FromBody] Get_All_Products_Input ObjClass The [FromBody] is another attribute, this one is basically saying when a request comes in, look at the body of the request and try to match the property names of the body’s content to the property names in the Get_All_Products_Input class. Get_All_Products_Input is the type for the parameter ObjClass.
{
if (ObjClass == null)
{
return this.BadRequestCustom(ObjClass, null, _logger);
}
These line of code start by checking if the ObjClass parameter is null. If it is then it is calling a method on the class called BadRequestCustom, passing ObjClass , null and _logger as arguments and returning the result. Don’t have the code for this method, so can’t say what it is actually doing.
else
{
If ObjClass was not null then the following code is run.
// call Get_All_Products, passing in ObjClass parameter. This is asynchronous, so we await it so as not to block the thread and store the result in a variable called result.
var result = await _settingsRepo.Get_All_Products(ObjClass);
// if the result variable is null
if (result == null)
{
// call the NotFoundCustom method, passing ObjClass, null and _logger as arguments and return the result.
return this.NotFoundCustom(ObjClass, null, _logger);
}
// result isn't null so run this code
else
{
// It appears that result is a collection of some unknown type (can't figure it out from the code). This line is trying to change the type (cast) each object to be type Get_All_Products_Output and the .ToList() is making the result of the Cast as list. Store the result in a variable called item.
List<Get_All_Products_Output> item = result.Cast<Get_All_Products_Output>().ToList();
// check that the list has items in it not that because the code for the if and else is only one like {} aren't needed
if (item.Count > 0)
// if it does the call the OkCustom method passing ObjClass, result and _logger as arguments and return the result.
return this.OkCustom(ObjClass, result, _logger);
// Doesn't have any items
else
// call the Fail method passing ObjClass, result and _logger as arguments and return the result.
return this.Fail(ObjClass, result, _logger);
}
Sorry for changing how I was explaining each line halfway through but I’m not going back and changing it. I tried to keep it simple and high level too. I don’t know why you want this code explained but note it does some pretty weird things