You use as when you're not sure whether the object can be converted to the specified type; in which case, you should always check for null before using the variable. Using T y = x as T; without then checking for y == null is always a mistake.
When you're certain that the object will be of the desired type, you use a cast expression instead: T y = (T)x; In this case, there is no need to check for null, since the runtime would throw an exception if the conversion cannot be performed.
Is is realistic to make money from a small mobile/tablet app? That's a ridiculously vague question, I know, so I'll add a bit of background.
I'm coming to the end of a long project that has increased my experience of mobile application programming (using Xamarin and C#). I don't yet have another contract lined up. What I do have are ideas for two or three small applications, the smallest of which may take only about a month-or-so to get to a first version. Judging by other applications I have seen in the app store, I'd say that my application is something someone might pay £0-99 or £1-99 to get the Pro version (which I'd advertise in the Standard version). And I am wondering if I can make a few quid?
I don't expect to make much but even £10-£50 per month is still money in the bank. I don't seem to be able to get any kind of answer anywhere whether this is remotely likely. I guess I am hoping that one of you out there has personal experience of this and could at least sketch me an outline of whether this is even worth a go.
Absolutely any advice would be extremely welcome.
Thank you to anyone taking the time to read my posts.
I don't have the answer, but it is probably worth spending time at the app store(s). Are there any other apps that are similar, and what sort of comments are people making about them? What sort of comments do you see on any apps that are only vaguely similar? One of the main take homes from the comments is finding out what the public want to see from their apps.
You can sell a few; depends on the app. If it's another "pdf reader", probably not.
If it's an app you wouldn't use yourself; probably not.
My current app will be a first of a kind; I'll see what it does. My other apps are similar to some others; I just made mine better (or tried).
In the Microsoft store, you pay higher fees to MS (30%) for games you sell than for others (10%). Although my apps have a "gaming" aspect to them, I have them in the "reference" section because they have a historical aspect. (Which gave me material for more ideas)
Anyway, there are "thousands" of apps; so you get to dabble in "box art" and "marketing" to get your app noticed (and "moved" in the listings). The Store gives you a page for your app; so you get some analytics to work with.
"Before entering on an understanding, I have meditated for a long time, and have foreseen what might happen. It is not genius which reveals to me suddenly, secretly, what I have to say or to do in a circumstance unexpected by other people; it is reflection, it is meditation." - Napoleon I
I guess that your app might be a stand-alone executable, if so then be careful how you write your XML that you include in the executable. It is not complicated. Microsoft has some guidelines that help you get on their list.
Do it. Make some money. Do not be afraid of competition. Do not worry about competition so much that you do not have a product out there.
I program business logik in ERP systems in Visual Studio with vb.net and C#.
Now I would like to try and learn to make app's so maybe one day and I can make app's that show business data.
But beeing new to this I find it difficult to get started. There is a lot of new words I don't know the meaning of and it is difficult to find out how to best start making app's.
I started looking at Xamarin beeing used to VS and all, but I just found out that this seems to be obsolete?
I would like to only write code once and use it on both android and ios - but is this realistic?
Any recommendations where to start?
A good place be be guided through which buzz words I need to know about and the technology they represent?
Should I use Xamarin, or Flutter or...???
Hands on example that makes it easy to learn by doing?
Growing in Mobile Development Popularity
Hybrid applications are going to become more and more critical in the future.
It does not make sense to learn Java or hire Java developer for developing Android apps and to learn Objective-C / Swift to develop IOS applications and learn C# or hire a C# developer to develop Windows 10 phone applications.
I know I'm going way, way back here, but maybe someone here has done this a long time ago.... I have a multiplatform project I support - the older platforms use EVC++ 4.0 to build the application, the newer platform uses VS2008 Professional.
In VS2008, I can create a folder, add many subprojects into it, and compile all of them by simply right mouse clicking on the folder and select Build. In effect, the folder is a dummy target, and VS2008 just knows how to build the proper dependency tree.
I'd like to do the same in EVC++, but it has no folder option at the project / workspace level. I can create a simple project and establish dependencies to the subprojects, but EVC++ insists on having an output target of some type.
Anyone know how to fake out EVC++? I know I'm grasping here If I were back in Unix land, I'd just edit my make file and create the dummy target manually. Hmmm, possibilities here.
“They who can give up essential liberty to obtain a little temporary safety deserve neither liberty nor safety.” BF, 1759
I am looking for a solution to this problem please
Write a calculation function allowing to perform an operation on two numbers according to a given operator.
In addition to the two numbers it will be necessary to pass a 3rd parameter defining the type of operation to be done: + (addition), - (subtraction), * (multiplication), / (division)
Last Visit: 31-Dec-99 19:00 Last Update: 28-Feb-24 4:09