Answers

• XinshuaiDing USMember ✭

  July 2018

  by the way, the xamarin form version is 3.1.0.637273

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• ClintB Member ✭✭

  August 2018

  I am having the same issue. I've tried both in the XAML and in the code behind. I get the same error with the code behind and in the XAML it says: The attachable property 'ToolbarPlacement' was not found in type 'TabbedPage'.

  I am trying to follow the article provided by Microsoft on Android platform specifics

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• shellddor Member ✭✭

  August 2018

  Good day!
  Faced such a problem. At first I thought that the problem in the code, but after downloading the sample code and running it in VS received the same message

  'IPlatformElementConfiguration<Android, TabbedPage>' does not contain a definition for 'SetToolbarPlacement' and no extension method 'SetToolbarPlacement' accepting a first argument of type 'IPlatformElementConfiguration<Android, TabbedPage>' could be found (are you missing a using directive or an assembly reference?)

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• seanyda GBMember ✭✭✭✭✭

  August 2018 edited August 2018

  Do you have this using statement?

  using Xamarin.Forms.PlatformConfiguration.AndroidSpecific;
  

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• shellddor Member ✭✭

  August 2018 edited August 2018

  Oh sure.
  Here is the code in which the error occurs:

  using Xamarin.Forms;
  using Xamarin.Forms.PlatformConfiguration.AndroidSpecific;
  using Xamarin.Forms.PlatformConfiguration;
  using Xamarin.Forms.Xaml;

  namespace App1
  {
  [XamlCompilation(XamlCompilationOptions.Compile)]
  public partial class MainPage : Xamarin.Forms.TabbedPage
  {
  public MainPage ()
  {
  InitializeComponent();
  On().SetToolbarPlacement(ToolbarPlacement.Bottom);
  }
  }
  }

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• seanyda GBMember ✭✭✭✭✭

  August 2018

  @shellddor said:
  Oh sure.
  Here is the code in which the error occurs:

  using Xamarin.Forms;
  using Xamarin.Forms.PlatformConfiguration.AndroidSpecific;
  using Xamarin.Forms.PlatformConfiguration;
  using Xamarin.Forms.Xaml;

  namespace App1
  {
  [XamlCompilation(XamlCompilationOptions.Compile)]
  public partial class MainPage : Xamarin.Forms.TabbedPage
  {
  public MainPage ()
  {
  InitializeComponent();
  On().SetToolbarPlacement(ToolbarPlacement.Bottom);
  }
  }
  }

  I thought it was supposed to be

  On<Xamarin.Forms.PlatformConfiguration.Android>().SetToolbarPlacement(ToolbarPlacement.Bottom);
  

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• shellddor Member ✭✭

  August 2018

  The same mistake.
  Code:

  using Xamarin.Forms.PlatformConfiguration.AndroidSpecific;
using Xamarin.Forms.Xaml;

  namespace App1
{
[XamlCompilation(XamlCompilationOptions.Compile)]
public partial class MainPage : Xamarin.Forms.TabbedPage
{
public MainPage()
{
InitializeComponent();
On<Xamarin.Forms.PlatformConfiguration.Android>().SetToolbarPlacement(ToolbarPlacement.Bottom);
}
}
}

  Errors:
  The type or namespace name 'App' could not be found (are you missing a using directive or an assembly reference?) ...App1\App1.Android\MainActivity.cs 1

  The name 'ToolbarPlacement' does not exist in the current context ...
  ...App1\App1\MainPage.xaml.cs 1

  Dependent project App1.csproj failed to build, using old version. 1

  'IPlatformElementConfiguration<Android, TabbedPage>' does not contain a definition for 'SetToolbarPlacement' and no extension method 'SetToolbarPlacement' accepting a first argument of type 'IPlatformElementConfiguration<Android, TabbedPage>' could be found (are you missing a using directive or an assembly reference?) ...App1\App1\MainPage.xaml.cs 1

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• WillBicks USMember ✭

  August 2018

  I've been scouring the internet for hours trying to find a solution to this issue, and I finally discovered something that worked, at least for me. It's a little bit hacky, but it seems to work reliably for me.

  I first got a hint after updating to VS version 15.8.1, when I was able to successfully run my application. Then I went to re-enable Xamarin Live Player after the update, tried to run my application, and the error came back.

  Using the VS installer, I repaired my installation to reset my settings and therefore disable Xamarin Live Player (which could be unrelated, but seems to be correlated with the issue being present), and I am now able to compile without error!

  I'd be interested to hear whether this is just me, or if this works for others.

  0
• WillBicks USMember ✭

  August 2018

  I've been scouring the internet for hours trying to find a solution to this issue, and I finally discovered something that worked, at least for me. It's a little bit hacky, but it seems to work reliably for me.

  I first got a hint after updating to VS version 15.8.1, when I was able to successfully run my application. Then I went to re-enable Xamarin Live Player after the update, tried to run my application, and the error came back.

  Using the VS installer, I repaired my installation to reset my settings and therefore disable Xamarin Live Player (which could be unrelated, but seems to be correlated with the issue being present), and I am now able to compile without error!

  I'd be interested to hear whether this is just me, or if this works for others.

  0
• dmskr123 Member ✭

  December 2018

  just rebuild solution

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