CS0117 C# 'Resource.Id' does not contain a definition for "PhoneNumberText"

Question

I use Visual Studio 2015 with Xamarin. I'm naming my project "Phoneword" I see this code such as tutorial/example on Xamarin's site.

The same error for TranslateButton and CallButton members.

MainActivity.cs

using System;
using Android.App;
using Android.Content;
using Android.Runtime;
using Android.Views;
using Android.Widget;
using Android.OS;

namespace Phoneword
{
[Activity(Label = "Phoneword", MainLauncher = true)]
public class MainActivity : Activity
{
    protected override void OnCreate(Bundle bundle)
    {
        base.OnCreate(bundle);

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

        // Our code will go here
        // Get our UI controls from the loaded layout:
        EditText phoneNumberText = (EditText)FindViewById(Resource.Id.PhoneNumberText);
        Button translateButton = FindViewById<Button>(Resource.Id.TranslateButton);
        Button callButton = FindViewById<Button>(Resource.Id.CallButton);

        // Disable the "Call" button
        callButton.Enabled = false;

        // Add code to translate number
        string translatedNumber = string.Empty;

        translateButton.Click += (object sender, EventArgs e) =>
        {
            // Translate user's alphanumeric phone number to numeric
            translatedNumber = Core.PhonewordTranslator.ToNumber(phoneNumberText.Text);
            if (String.IsNullOrWhiteSpace(translatedNumber))
            {
                callButton.Text = "Call";
                callButton.Enabled = false;
            }
            else
            {
                callButton.Text = "Call " + translatedNumber;
                callButton.Enabled = true;
            }
        };

        callButton.Click += (object sender, EventArgs e) =>
        {
            // On "Call" button click, try to dial phone number.
            var callDialog = new AlertDialog.Builder(this);
            callDialog.SetMessage("Call " + translatedNumber + "?");
            callDialog.SetNeutralButton("Call", delegate {
                // Create intent to dial phone
                var callIntent = new Intent(Intent.ActionCall);
                callIntent.SetData(Android.Net.Uri.Parse("tel:" + translatedNumber));
                StartActivity(callIntent);
            });
            callDialog.SetNegativeButton("Cancel", delegate { });

            // Show the alert dialog to the user and wait for response.
            callDialog.Show();
        };
    }

}
}

Resource/Layout/Main.axml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent">
    <TextView
        android:text="Enter a Phoneword"
        android:textAppearance="?android:attr/textAppearanceLarge"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/textView1" />
    <EditText
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/PhoneNumberText"
        android:text="1-855-XAMARIN" />
    <Button
        android:text="Translate"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/TranslateButton" />
    <Button
        android:text="Call"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/CallButton" />
</LinearLayout>

I'm beginner in Android development, if you need other information i'll try to add more detail. Please help me

Does your axml file have the correct build action http://stackoverflow.com/questions/23955548/xamarin-android-resource-file-not-found — ClintL, Jun 29 '16 at 19:52

Greta · Accepted Answer · 2016-06-30T12:58:33.987

3

I solved my problem! From Tools/Android SDK Manager I uninstalled:

Android SDK Build-tools 24
Android N (API 24)

and I installed:

Android 6.0 (API 23)
Android SDK Build-tools 23.0.3
Android SDK Build-tools 23.0.2

After I closed VS and I restarted it... In the Solution Explorer I selected "Clean Solution" and after I selected "Rebuild Solution".

edited Jun 30 '16 at 12:58

answered Jun 30 '16 at 12:53

Greta

111
1
1
11

score 3 · Answer 2 · answered Nov 13 '18 at 15:00

3

This kind of thing happens so often in Visual Studio, and wastes so much time.

Try...

Exclude from Project, then Add Existing Item

Works more often than not, much easier to at least try before some of the suggestions above

answered Nov 13 '18 at 15:00

telecetera

51
5

score 1 · Answer 3 · answered Mar 24 '17 at 01:41

1

The issue for me was that I changed the Namespace from the default that was created, after I had been working in the project for a bit.

answered Mar 24 '17 at 01:41

Eldon Elledge

31
3

Yes same - changed namespace directly in my activity without doing a 'proper' rename through the project – Cameron Forward Sep 26 '17 at 10:42

score 0 · Answer 4 · answered Sep 28 '16 at 08:02

0

This can also be caused if you have a values XML file that doesn't have a build action of AndroidResource (sometimes VS will create it as a TransformFile)

answered Sep 28 '16 at 08:02

Adam Baxter

1,907
21
41

I know, but the problem is caused by the sdk build-tools in my case. Thank you anyway – Greta Sep 30 '16 at 14:57

score 0 · Answer 5 · answered May 17 '18 at 13:46

I have the same error, but my solution itself would still compile.

It's still annoying though to have the error list littered with false errors.

Try this:

delete the .vs folder
clean solution and then re-open studio,

With these steps I no longer received the false errors. I would recommend trying this for anyone who has a similar situation.

score 0 · Answer 6 · answered May 24 '19 at 23:26

I faced the same problem following the tutorial Remote Notification with Firebase Cloud Messaging, I one step I had to replace de "activity_main.axml" with a code that introduced the resource

android:id="@+id/msgText"

The application did run fine, but compiler showed the error "resource.id does not contain a definition for msgText", in method MainActivity.OnCreate which invokes it this way:

this.msgText = FindViewById<TextView>(Resource.Id.msgText);

After I closed VS and I restarted it... In the Solution Explorer I selected "Clean >Solution" and after I selected "Rebuild Solution".

worked for me. BTW, I'm running VS2019

K C · Answer 7 · 2019-10-02T17:18:04.893

I know this goes back to 2014, this issue is all over the web and still an issue in 2019. Nothing would fix it for me from all the websites, could never get FindViewById to see the Button's name even though it's in the auto generated proxy class.

Now this seems to be working, I used the dynamic ID of the button control instead of it's name, .i.e. Button dsdsd = FindViewById(2131230730); So far so good.

Edit: Confirmed this works for me, firing my delegate function.

Edit: Yet another update, after adding another UI control, sequentially after the button, the button name is now showing up, (in intelisense). I don't have to use the ID now. The new control is not showing up though. Even with complete rebuild and closing and re-opening the project/IDE. BTW using Xamarin Android native, not forms.

score 0 · Answer 8 · answered Dec 11 '19 at 09:37

Sometimes such error happens when your layout xml file has errors (which haven't been spotted yet). For example, if you have attribute duplicate or unclosed quotes (could happen when you change value).

So the element which contains an error and all the following elements will become 'invisible' in your project.

Just try checking for errors once more. When errors are gone - elements become 'visible' automatically!

score 0 · Answer 9 · answered Apr 14 '20 at 06:02

0

it worked for me after restarting visual studio

answered Apr 14 '20 at 06:02

bomee boome

1

score 0 · Answer 10 · answered Mar 03 '22 at 14:08

How about you go to the xml file related to this activity file and add these three things I have provided below if they are not already there in your xml file.

  xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"

You have to place the after this <?xml version="1.0" encoding="utf-8"?> and inside the relative or linear layout that is for example like this

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent">
</RelativeLayout>

CS0117 C# 'Resource.Id' does not contain a definition for "PhoneNumberText"

10 Answers10

Linked