Calling Async method in class constructor in C#

Question

Currently I'm developing an universal app using c#.

In app I used sqlite as database and as you may now It has async methods.

I have a class with some null property that I'll fill them using data I fetch from db, but It should be done exactly in class constructor.

The problem is that using async methods is not allowed, So I tried creating a new async method and using sqlite methods and filling properties in it to call it synchronously in constructor, but as may expecting It doesn't work well.

How can I use async method in class constructor in a way to get data from db and fill class properties right in class constructor method?

Update: Notice that I'm not asking about could it be done or no, I want to init my class vars with data coming from db when the class constructed

Show us the code you have so far. Did you get an error message? What is it? — Robert Harvey, Mar 23 '15 at 17:20

score 9 · Answer 1 · edited Jun 20 '20 at 09:12

9

Don't do that

Constructors should be simply that: constructors. Move complex initializations to an initialize method.

Constructors have a limited ability to fail gracefully, so don't do anything complicated, long-running, or fragile in them.

edited Jun 20 '20 at 09:12

Community

1
1

answered Mar 23 '15 at 17:23

Steven A. Lowe

60,273
18
132
202

@RobertHarvey: thanks for the link! I still think this is a bad idea ;) – Steven A. Lowe Mar 23 '15 at 17:30
A.Lowe: dear I've already mentioned that I've done your suggestion but It doesn't work as expected – RaminMT Mar 23 '15 at 17:42
1

@RaminMT: i think you misunderstood: I recommend that you *do not do this from the constructor* – Steven A. Lowe Mar 23 '15 at 19:06
I get what you mean, but I think this is what we call it "construct"!!! – RaminMT Mar 23 '15 at 19:39
@RaminMT: the purpose of a constructor is to create the object; trivial initialization is okay because it can't fail. Don't do anything in a constructor that can fail, because there is no way to recover. – Steven A. Lowe Mar 24 '15 at 21:06

Calling Async method in class constructor in C#

1 Answers1

Don't do that

Linked

Related