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 visual studio 2017 xamarin c# hello world walkthrough

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Moti Barski

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Posts : 118
Join date : 2011-08-02

PostSubject: visual studio 2017 xamarin c# hello world walkthrough   Sat May 13, 2017 11:37 am

install visual studio with c# and xamarin checked, if you already have VS DL xamarin.

open your mobil device for developing search the walkthrough for your phone.

in the now visible phone developer options (on your phone), enable usb debugging

new project, c#, android, single view app
from solution explore, resources, layout, main xml, drag add button from the toolbox, save

from main.cs of solution explorer right side window : main.cs

add code :
Button button1 = FindViewById<Button>(Resource.Id.button1);

           button1.Click += delegate { button.Text = string.Format("hello world"); };

now your code is :
Code:
using System;
using Android.App;
using Android.Content;
using Android.Runtime;
using Android.Views;
using Android.Widget;
using Android.OS;

namespace App8
{
    [Activity(Label = "App8", MainLauncher = true, Icon = "@drawable/icon")]
    public class MainActivity : Activity
    {
        int count = 1;

        protected override void OnCreate(Bundle bundle)
        {
            base.OnCreate(bundle);

            // Set our view from the "main" layout resource
            SetContentView(Resource.Layout.Main);

            // Get our button from the layout resource,
            // and attach an event to it
            Button button = FindViewById<Button>(Resource.Id.MyButton);

            button.Click += delegate { button.Text = string.Format("{0} clicks!", count++); };
            // and attach an event to it
            Button button1 = FindViewById<Button>(Resource.Id.button1);

            button1.Click += delegate { button.Text = string.Format("hello world"); };
        }
    }
}
connect phone , click green arrow or f5

example for textview widget + button :
Code:
using Android.Runtime;
using Android.Views;
using Android.Widget;
using Android.OS;

namespace App8
{
    [Activity(Label = "App8", MainLauncher = true, Icon = "@drawable/icon")]
    public class MainActivity : Activity
    {
        int count = 1;

        protected override void OnCreate(Bundle bundle)
        {
            base.OnCreate(bundle);

            // Set our view from the "main" layout resource
            SetContentView(Resource.Layout.Main);

            // Get our button from the layout resource,
            // and attach an event to it
            Button button = FindViewById<Button>(Resource.Id.MyButton);

            button.Click += delegate { button.Text = string.Format("{0} clicks!", count++); };
            // and attach an event to it
            Button button1 = FindViewById<Button>(Resource.Id.button1);
            TextView text1 = FindViewById<TextView>(Resource.Id.textView1);
            button1.Click += delegate { text1.Text = "hello world"; };
        }
    }
}


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Moti Barski

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PostSubject: Re: visual studio 2017 xamarin c# hello world walkthrough   Sat May 13, 2017 4:55 pm

after you finish debugging and unplug your mobile device turn off the developer options or your B8Tri will deplete very fast

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PostSubject: displaying a message   Sat Jul 29, 2017 11:34 am

this is a faster way to display a message, use the toast message display spell :
Code:
Toast.MakeText(this, "hello world", ToastLength.Short).Show();
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