Xamarin Forms App Calling Web API Pin - Android Discussion Boards

Re: Hiring Programmer for Android apps.

User 149000168-Sep-20 15:23

User 14900016

8-Sep-20 15:23

Where does one even look for a good legit honest programmer? I don't know how to search.

modified 13-Nov-20 21:01pm.

Re: Hiring Programmer for Android apps.

Richard MacCutchan8-Sep-20 21:36

Richard MacCutchan

8-Sep-20 21:36

Go to a local recruitment agency. It is really not that difficult.

Re: Hiring Programmer for Android apps.

User 1490001610-Sep-20 8:18

User 14900016

10-Sep-20 8:18

I don't know what that is? What if the best person for the job isn't local?

modified 13-Nov-20 21:01pm.

Re: Hiring Programmer for Android apps.

Richard MacCutchan10-Sep-20 9:19

Richard MacCutchan

10-Sep-20 9:19

No idea, but this is not really the place for your question.

Re: Hiring Programmer for Android apps.

klindouchous30-Dec-20 7:14

klindouchous

30-Dec-20 7:14

i think you are in the wrong forum

Re: Hiring Programmer for Android apps.

thinkstartpl27-Apr-21 2:50

thinkstartpl

27-Apr-21 2:50

Look For a Proficient Team of Android App Developers with sound knowledge of open source plateforms.

Richard MacCutchan8-Aug-20 23:06

Richard MacCutchan

8-Aug-20 23:06

Google store is the place for Android apps.

Xamarin Forms App Calling Web API Pin

Kevin Marois20-Jul-20 7:26

Kevin Marois

20-Jul-20 7:26

'm learning Xamaring Forms. I want to test connecting to a Web API. I have a an Asp.Net Framework Web API running and I can connect to to it.
However, in my Xamarin Forms page, when I call it, the call to GetAsync never returns:

public class MainPageViewModel : _ViewModelBase
{
    private string url = "<a href="https://localhost:44340/api/Test/GetAll"><a href="https://localhost:44340/api/Test/GetAll">https://localhost:44340/api/Test/GetAll</a></a>";
    public List<TestDataEntity> Items { get; set; }
    public MainPageViewModel()
    {
        GetData();
    }
    private async Task GetData()
    {
        try
        {
            HttpClient client = new HttpClient();
            HttpResponseMessage response = await client.GetAsync(url);  // <====== NEVER RETURNS

            if (response.IsSuccessStatusCode)
            {
                string content = await response.Content.ReadAsStringAsync();
                Items = JsonConvert.DeserializeObject<List<TestDataEntity>>(content);
            }
        }
        catch (Exception e)
        {
            throw;
        }
    }
}

I can paste the URL into a browser and see the JSON results. If the WebAPI is NOT running the GetAsync throws.

Anyone have any thoughts on this?

If it's not broken, fix it until it is.
Everything makes sense in someone's mind.
Ya can't fix stupid.

Re: Xamarin Forms App Calling Web API Pin

Richard Deeming20-Jul-20 21:38

Richard Deeming

20-Jul-20 21:38

It sounds like you have a deadlock somewhere. Try adding .ConfigureAwait(false) to the GetAsync call.

private async Task GetData()
{
    try
    {
        HttpClient client = new HttpClient();
        HttpResponseMessage response = await client.GetAsync(url).ConfigureAwait(false);

        if (response.IsSuccessStatusCode)
        {
            string content = await response.Content.ReadAsStringAsync();
            Items = JsonConvert.DeserializeObject<List<TestDataEntity>>(content);
        }
    }
    catch (Exception e)
    {
        throw;
    }
}

"These people looked deep within my soul and assigned me a number based on the order in which I joined."
- Homer

Re: Xamarin Forms App Calling Web API Pin

Kevin Marois21-Jul-20 6:22

Kevin Marois

21-Jul-20 6:22

Well that helped, a bit.

Again, I'm just trying to create a small, simple xamarin forms example that connects to a web api. I've read these:
Consume a RESTful Web Service - Xamarin | Microsoft Docs
6 Steps to Consume ASP.Net Core Web API in Xamarin | Syncfusion Blogs

Here's what I have now:

private async Task GetData()
{
    //string url = $"https://localhost:44340/api/Test/GetAll";
    string url = $"https://127.0.0.1:44340/api/Test/GetAll";
    try
    {
        HttpClient client = new HttpClient();
        HttpResponseMessage response = await client.GetAsync(url).ConfigureAwait(false);
        if (response.IsSuccessStatusCode)
        {
            string content = await response.Content.ReadAsStringAsync();
            Items = JsonConvert.DeserializeObject<List<TestDataEntity>>(content);
        }
    }
    catch (Exception e)
    {
        throw;
    }
}

My browser opens and shows the commented out url (https:/localhost:44340). Yet the call to GetAsync throws "{System.Net.WebException: Failed to connect to localhost/127.0.0.1:44340". When I try that URL I get the same exception.

If it's not broken, fix it until it is.
Everything makes sense in someone's mind.
Ya can't fix stupid.

Re: Xamarin Forms App Calling Web API Pin

Richard Deeming21-Jul-20 6:56

Richard Deeming

21-Jul-20 6:56

Is the WebAPI project running? That looks like an IIS Express URL, which means you'll need to run the API project from Visual Studio for the URL to work.

Also, if you're using a self-signed certificate and you haven't added it to your local PC's trust store, you'll need some extra code to ignore the certificate error:
c# - Allowing Untrusted SSL Certificates with HttpClient - Stack Overflow[^]

"These people looked deep within my soul and assigned me a number based on the order in which I joined."
- Homer

Re: Xamarin Forms App Calling Web API Pin

Kevin Marois21-Jul-20 6:58

Kevin Marois

21-Jul-20 6:58

Yes, the API is running. In the browser I can type localhost:44340/api/test/GetAll and it returns json data from my repo.

localhost:44340 is what VS gives me when I run the app. So I'm trying that same URL in the Android app. Yet the exception shows the other IP address

If it's not broken, fix it until it is.
Everything makes sense in someone's mind.
Ya can't fix stupid.

modified 21-Jul-20 13:16pm.

Re: Xamarin Forms App Calling Web API Pin

Richard Deeming21-Jul-20 23:17

Richard Deeming

21-Jul-20 23:17

localhost is an alias for 127.0.0.1, so it's resolving to the correct address.

Did you add the self-signed certificate to the local computer's trusted certificates store?

"These people looked deep within my soul and assigned me a number based on the order in which I joined."
- Homer

Re: Xamarin Forms App Calling Web API Pin

Kevin Marois22-Jul-20 6:45

Kevin Marois

22-Jul-20 6:45

Richard Deeming wrote:
Did you add the self-signed certificate to the local computer's trusted certificates store?

What cert are you referring to?

If it's not broken, fix it until it is.
Everything makes sense in someone's mind.
Ya can't fix stupid.

Re: Xamarin Forms App Calling Web API Pin

Richard Deeming22-Jul-20 7:30

Richard Deeming

22-Jul-20 7:30

IIS Express issues a self-signed certificate to serve your application over HTTPS instead of HTTP.

When you open the site in a browser, you should see a warning that the certificate is untrusted.

"These people looked deep within my soul and assigned me a number based on the order in which I joined."
- Homer

Re: Xamarin Forms App Calling Web API Pin

Kevin Marois22-Jul-20 7:36

Kevin Marois

22-Jul-20 7:36

I'm running from VS. When I start the app Chrome opens and I see JSON returned from my DAL. But no cert warnings.

If it's not broken, fix it until it is.
Everything makes sense in someone's mind.
Ya can't fix stupid.

Re: Xamarin Forms App Calling Web API Pin

Richard Deeming22-Jul-20 22:09

Richard Deeming

22-Jul-20 22:09

It sounds like you've added the certificate to Chrome's certificate store, or enabled chrome://flags/#allow-insecure-localhost to bypass the certificate warning.

"These people looked deep within my soul and assigned me a number based on the order in which I joined."
- Homer

android studio

Member 1488720211-Jul-20 20:30

Member 14887202

11-Jul-20 20:30

basic code for creating ah basci blog in the android studio with flutter project

Re: android studio

Richard MacCutchan11-Jul-20 23:05

Richard MacCutchan

11-Jul-20 23:05

Is that a question or a statement?

Re: android studio

Richard Andrew x6420-Jul-20 9:50

Richard Andrew x64

20-Jul-20 9:50

Richard MacCutchan wrote:
Is that a question or a statement?

It's a demand.

The difficult we do right away...
...the impossible takes slightly longer.

Re: android studio

Richard MacCutchan20-Jul-20 10:03

Richard MacCutchan

20-Jul-20 10:03

Oh dear, I was afraid it might be. Laugh | :laugh:

File and App sharing app

AdityaSha8-Jul-20 17:00

AdityaSha

8-Jul-20 17:00

Hii guys i have a question that i create app . The app is able to send files like .mp3,.pdf etc.

But i want app should able to share apps also so what are the thing required . Can you suggest me.

Thank you.

Re: File and App sharing app

Richard MacCutchan8-Jul-20 22:49

Richard MacCutchan

8-Jul-20 22:49

AdityaSha wrote:
Can you suggest me.

You first need to decide, and describe, exactly what you mean by "app should able to share apps". What exactly do you want to share and who with?

Re: File and App sharing app

AdityaSha10-Jul-20 1:51

AdityaSha

10-Jul-20 1:51

I want to share app and files like .pdf and .mp3 files. To another device using wifi direct . I created app which can perform all operation which i want but it not able to send apps to another device . Basically a clone of ShareIT app.

Re: File and App sharing app

Richard MacCutchan10-Jul-20 3:11

Richard MacCutchan

10-Jul-20 3:11

Well I guess you need to research how to do the sharing. I can only assume that you need to post your files onto a web server somewhere that other people can get access to.

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