- Mac Visual Studio Blank Forms App Net Standard Not Available 2016
- Mac Visual Studio Blank Forms App Net Standard Not Available Free
- Mac Visual Studio Blank Forms App Net Standard Not Available Windows 10
- Mac Visual Studio Blank Forms App Net Standard Not Available 2017
Jan 22, 2019 The application that will be developed is a Web site that displays the In this video, Sayed Hashimi will show you how you can create your first ASP.NET Core web application with Visual Studio for Mac. I am facing a weird situation when creating a Blank Form App in visual studio for mac. The option of '.Net Standard' is greyed out and I am unable to select it. The only option by default is the 'Shared Code'. I am using Visual Studio Code version 7.5.2. Like Visual C#, Visual Basic also supports the Visual Studio Class designer, Forms designer, and Data designer among others. Like C#, the VB.NET compiler is also available as a part of.NET Framework, but the language services that let VB.NET projects be developed with Visual Studio, are available.
-->Before attempting this tutorial, you should have successfully completed the:
- Build your first Xamarin.Forms app quickstart.
- StackLayout tutorial.
On the left-hand side of the New Project window, under the Multiplatform category, click App, select Blank Forms App, ensuring that the drop-down box next to it is set to C#. I have installed all the tools for development with Xamarin in Visual Studio 2015, but somehow I do not see Blank App (Native) template when I create new project. I am only able to use Blank Apps (Xamarin Forms) template. I have already tried to reinstall Xamarin, reinstall Visual Studio install all the Xamarin sdks separately, but still no.
In this tutorial, you learn how to:
- Create a Xamarin.Forms
Image
in XAML. - Customize the
Image
appearance. - Display a local image file from each platform project.
You will use Visual Studio 2019, or Visual Studio for Mac, to create a simple application that demonstrates how to display an image and customize its appearance. The following screenshots show the final application:
Create a image
To complete this tutorial you should have Visual Studio 2019 (latest release), with the Mobile development with .NET workload installed. In addition, you will require a paired Mac to build the tutorial application on iOS. For information about installing the Xamarin platform, see Installing Xamarin. For information about connecting Visual Studio 2019 to a Mac build host, see Pair to Mac for Xamarin.iOS development.
- Launch Visual Studio, and create a new blank Xamarin.Forms app named ImageTutorial. Ensure that the app uses .NET Standard as the shared code mechanism.ImportantThe C# and XAML snippets in this tutorial requires that the solution is named ImageTutorial. Using a different name will result in build errors when you copy code from this tutorial into the solution.For more information about the .NET Standard library that gets created, see Anatomy of a Xamarin.Forms application in the Xamarin.Forms Quickstart Deep Dive.
- In Solution Explorer, in the ImageTutorial project, double-click MainPage.xaml to open it. Then, in MainPage.xaml, remove all of the template code and replace it with the following code:This code declaratively defines the user interface for the page, which consists of an
Image
in aStackLayout
. TheImage.Source
property specifies the image to display, via a URI. TheImage.Source
property is of typeImageSource
, which enables images to be sourced from files, URIs, or resources. For more information, see Displaying images in the Images in Xamarin.Forms guide.TheHeightRequest
property specifies the height of theImage
in device-independent units.NoteIt's not necessary to set theWidthRequest
property in this example. This is because, by default, theImage
maintains the aspect ratio of the image. - In the Visual Studio toolbar, press the Start button (the triangular button that resembles a Play button) to launch the application inside your chosen remote iOS simulator or Android emulator:NoteThe
Image
view automatically caches downloaded images for 24 hours. For more information, see Downloaded image caching in the Images in Xamarin.Forms guide.
To complete this tutorial you should have Visual Studio for Mac (latest release), with iOS and Android platform support installed. In addition, you will also require Xcode (latest release). For more information about installing the Xamarin platform, see Installing Xamarin.
- Launch Visual Studio for Mac, and create a new blank Xamarin.Forms app named ImageTutorial. Ensure that the app uses .NET Standard as the shared code mechanism.ImportantThe C# and XAML snippets in this tutorial requires that the solution is named ImageTutorial. Using a different name will result in build errors when you copy code from this tutorial into the solution.For more information about the .NET Standard library that gets created, see Anatomy of a Xamarin.Forms application in the Xamarin.Forms Quickstart Deep Dive.
- In Solution Pad, in the ImageTutorial project, double-click MainPage.xaml to open it. Then, in MainPage.xaml, remove all of the template code and replace it with the following code:This code declaratively defines the user interface for the page, which consists of an
Image
in aStackLayout
. TheImage.Source
property specifies the image to display, via a URI. TheImage.Source
property is of typeImageSource
, which enables images to be sourced from files, URIs, or resources. For more information, see Displaying images in the Images in Xamarin.Forms guide.TheHeightRequest
property specifies the height of theImage
in device-independent units.NoteIt's not necessary to set theWidthRequest
property in this example. This is because, by default, theImage
maintains the aspect ratio of the image. - In the Visual Studio for Mac toolbar, press the Start button (the triangular button that resembles a Play button) to launch the application inside your chosen iOS simulator or Android emulator:NoteThe
Image
view automatically caches downloaded images for 24 hours. For more information, see Downloaded image caching in the Images in Xamarin.Forms guide.
Customize appearance
- In MainPage.xaml, modify the
Image
declaration to customize its appearance:This code sets theAspect
property, which defines the scaling mode of the image, toFill
. TheFill
member is defined in theAspect
enumeration, and stretches the image to completely fill the view, regardless of whether the image is distorted. For more information about image scaling, see Displaying images in the Images in Xamarin.Forms guide.TheOnPlatform
markup extension enables you to customize UI appearance on a per-platform basis. In this example, the markup extension is used to set theHeightRequest
andWidthRequest
properties to 300 device-independent units on iOS and to 250 device-independent units on Android. For more information about theOnPlatform
markup extension, see OnPlatform markup extension in the Consuming XAML Markup Extensions guide.In addition, theHorizontalOptions
property specifies that the image will be horizontally centered. - In the Visual Studio toolbar, press the Start button (the triangular button that resembles a Play button) to launch the application inside your chosen remote iOS simulator or Android emulator:
- In MainPage.xaml, modify the
Image
declaration to customize its appearance:This code sets theAspect
property, which defines the scaling mode of the image, toFill
. TheFill
member is defined in theAspect
enumeration, and stretches the image to completely fill the view, regardless of whether the image is distorted. For more information about image scaling, see Displaying images in the Images in Xamarin.Forms guide.TheOnPlatform
markup extension enables you to customize UI appearance on a per-platform basis. In this example, the markup extension is used to set theHeightRequest
andWidthRequest
properties to 300 on iOS and to 250 on Android. For more information about theOnPlatform
markup extension, see OnPlatform markup extension in the Consuming XAML Markup Extensions guide.In addition, theHorizontalOptions
property specifies that the image will be horizontally centered. - In the Visual Studio for Mac toolbar, press the Start button (the triangular button that resembles a Play button) to launch the application inside your chosen iOS simulator or Android emulator:
Display a local image
Mac Visual Studio Blank Forms App Net Standard Not Available 2016
![Standard Standard](/uploads/1/2/6/4/126489411/782498818.jpg)
![Mac visual studio blank forms app net standard not available windows 10 Mac visual studio blank forms app net standard not available windows 10](/uploads/1/2/6/4/126489411/274394286.jpg)
Image files can be added to platform projects and referenced from Xamarin.Forms shared code. This method of distributing images is required when images are platform-specific, such as when using different resolutions on different platforms, or slightly different designs.
In this exercise, you will modify the ImageTutorial solution to display a local image, rather than an image downloaded from a URI. The local image is the Xamarin logo, which should be downloaded by clicking the button below.
Important
To use a single image across all platforms, the same filename must be used on every platform, and it should be a valid Android resource name (i.e. only lowercase letters, numerals, the underscore, and the period are allowed).
- In Solution Explorer, in the ImageTutorial.iOS project, expand Asset Catalogs, and double-click Assets to open it. Then, in the Assets.xcassets tab, click the Plus button and select Add Image Set:
- In the Assets.xcassets tab, select the new image set and the editor will be displayed:
- Drag XamarinLogo.png from your file system to the 1x box for the Universal category:
- In the Assets.xcassets tab, right-click the new image set's name and rename it to XamarinLogo:Save and close and Assets.xcassets tab.
- In Solution Explorer, in the ImageTutorial.Android project, expand the Resources folder. Then, drag XamarinLogo.png from your file system to the drawable folder:NoteVisual Studio will automatically set the build action for the image to AndroidResource.
- In the ImageTutorial project, in MainPage.xaml, modify the
Image
declaration to display the local XamarinLogo file:This code sets theSource
property to the local file to display. TheWidthRequest
property is set to 300 device-independent units on iOS, and 250 device-independent units on Android. In addition, theHorizontalOptions
property specifies that the image will be horizontally centered.NoteFor PNG images on iOS, the .png extension can be omitted from the filename specified in theSource
property. For other image formats, the extension is required. - In the Visual Studio for Mac toolbar, press the Start button (the triangular button that resembles a Play button) to launch the application inside your chosen iOS simulator or Android emulator:For more information about local images, see Local images in the Images in Xamarin.Forms guide.
- In Solution Pad, in the ImageTutorial.iOS project, double-click Assets.xcassets to open it. Then, in the Assets List, right-click and select New Image Set:
- In the Assets List, select the new image set and the editor will be displayed:
- Drag XamarinLogo.png from your file system to the 1x box for the Universal category:
- In the Assets List, double-click the new image set's name and rename it to XamarinLogo:
- In Solution Pad, in the ImageTutorial.Android project, expand the Resources folder. Then, drag XamarinLogo.png from your file system to the drawable folder.
- In the Add File to Folder dialog, select OK.NoteVisual Studio for Mac will automatically set the build action for the image to AndroidResource.
- In the ImageTutorial project, in MainPage.xaml, modify the
Image
declaration to display the local XamarinLogo file:This code sets theSource
property to the local file to display. TheWidthRequest
property is set to 300 device-independent units on iOS, and 250 device-independent units on Android. In addition, theHorizontalOptions
property specifies that the image will be horizontally centered.NoteFor PNG images on iOS, the .png extension can be omitted from the filename specified in theSource
property. For other image formats, the extension is required. - In the Visual Studio for Mac toolbar, press the Start button (the triangular button that resembles a Play button) to launch the application inside your chosen iOS simulator or Android emulator:For more information about local images, see Local images in the Images in Xamarin.Forms guide.
Mac Visual Studio Blank Forms App Net Standard Not Available Free
Congratulations!
Congratulations on completing this tutorial, where you learned how to:
- Create a Xamarin.Forms
Image
in XAML. - Customize the
Image
appearance. - Display a local image file from each platform project.
Next steps
Mac Visual Studio Blank Forms App Net Standard Not Available Windows 10
To learn more about the basics of creating mobile applications with Xamarin.Forms, continue to the Grid tutorial.
Related links
Mac Visual Studio Blank Forms App Net Standard Not Available 2017
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