What does assembly reference means?

[Abbsy]

Hello,

I am very new to programming. I decided to start with visual studio 2022 and watch some tutorials to get started. I would like to make a simple app for android, something like a notebook, so I choosed ' .net maui app ' as new project in VS 2022. I have been looking for a way to add a background to my app and I found RelativeLayout in many videos but it doesn't work with me.
I get an error but since I am new to programming, I don't really know where to look for a solution. The error is the following: the type 'RelativeLayout' was not found. Verify that you are not missing an assembly reference and that all referenced assemblies have been build.
I have tried to find a tutorial about this but I can't find it. I am probably looking wrong because I exctually don't really know what I am looking for.
In one of the videos they talked about the code behind so I tried to write some things on the other page and hoped that the suggestions that are popping up during writing would help me, but they did not.

So, can someone help me out with this of point me in the right direction?

 

[Antero360]

Hello,

I am very new to programming. I decided to start with visual studio 2022 and watch some tutorials to get started. I would like to make a simple app for android, something like a notebook, so I choosed ' .net maui app ' as new project in VS 2022. I have been looking for a way to add a background to my app and I found RelativeLayout in many videos but it doesn't work with me.
I get an error but since I am new to programming, I don't really know where to look for a solution. The error is the following: the type 'RelativeLayout' was not found. Verify that you are not missing an assembly reference and that all referenced assemblies have been build.
I have tried to find a tutorial about this but I can't find it. I am probably looking wrong because I exctually don't really know what I am looking for.
In one of the videos they talked about the code behind so I tried to write some things on the other page and hoped that the suggestions that are popping up during writing would help me, but they did not.

So, can someone help me out with this of point me in the right direction?

Hi there,
This usually means that you are trying to use some code from either a built-in library, or a library you may have added as a package, but VS cannot find any the location of said code. If you look at your code carefully, you may see some piece of code underlined in red. If you hover over it, VS may ask you if you are missing a reference. If you click on the suggested fixes, you may see that VS is suggesting something like "using BlaBlaBla;". That is called the using statement. Those can be found at the top of your file, and are the references to the libraries where you are using your code from. If you don't see anything like that, you may need to add the package/library through Nuget Package Manager.

 

[Abbsy]

Hello Antero360

Thank you for this answer. I have tried something like this. I have read something called nuget package and followed a video but it did not worked.
I don't know if I completely understand the thing about the built in library or package. Is it something I have to search for on the internet and download as an extra to VS? Or is it something that programmers make for themselfs? when I followed the tutorials about RelativeLayout nothing was said about this. It looked as if it was just classic code. But if it is not, is there also another way to gif my app a background image?

 

[Antero360]

Hello Antero360

Thank you for this answer. I have tried something like this. I have read something called nuget package and followed a video but it did not worked.
I don't know if I completely understand the thing about the built in library or package. Is it something I have to search for on the internet and download as an extra to VS? Or is it something that programmers make for themselfs? when I followed the tutorials about RelativeLayout nothing was said about this. It looked as if it was just classic code. But if it is not, is there also another way to gif my app a background image?

Nuget Package Manager comes built-in with the full Visual Studio IDE...not sure about if it does with vs code. Here's a playlist of 5 how to videos for Nuget 🙂 I hope this helps explain it better

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View: https://www.youtube.com/watch?v=WW3bO1lNDmo&list=PLdo4fOcmZ0oVLvfkFk8O9h6v2Dcdh2bh_

 

[Abbsy]

Hi,

The picture below is not meant for the code. It is just a standard code from VS 2022 that I opend to start with for the tutorials. The only thing I added here at this moment is RelativeLayout. I took a printscreen because I don't know what to do or where to look for the answer. I looked at the video about Nuget Package Manager but don't really see what I am supposed to look for in the manager. If I look for 'relativelayout' I can't found something. So how do I know what I have to look for?

Is there also another way to use a picture stored on my laptop as a background in an app I want to make where I can just work with VS 22 without extra downloading? Or is this maybe a more advanced aspect of programming?

 

[kane12]

Reference assemblies are a special type of assembly that contain only the minimum amount of metadata required to represent the library's public API surface. Reference assemblies can't be loaded for execution, but they can be passed as compiler input in the same way as implementation assemblies.

 

[Antero360]

Hi,

The picture below is not meant for the code. It is just a standard code from VS 2022 that I opend to start with for the tutorials. The only thing I added here at this moment is RelativeLayout. I took a printscreen because I don't know what to do or where to look for the answer. I looked at the video about Nuget Package Manager but don't really see what I am supposed to look for in the manager. If I look for 'relativelayout' I can't found something. So how do I know what I have to look for?

Is there also another way to use a picture stored on my laptop as a background in an app I want to make where I can just work with VS 22 without extra downloading? Or is this maybe a more advanced aspect of programming?

View attachment 2407

This means that you are missing a package or a few, depending on the error/warning messages.

 

[danmilller10]

Hello,

I am very new to programming. I decided to start with visual studio 2022 and watch some tutorials to get started. I would like to make a simple app for android, something like a notebook, so I choosed ' .net maui app ' as new project in VS 2022. I have been looking for a way to add a background to my app and I found RelativeLayout in many videos but it doesn't work with me.
I get an error but since I am new to programming, I don't really know where to look for a solution. The error is the following: the type 'RelativeLayout' was not found. Verify that you are not missing an assembly reference and that all referenced assemblies have been build.
I have tried to find a tutorial about this but I can't find it. I am probably looking wrong because I exctually don't really know what I am looking for.
In one of the videos they talked about the code behind so I tried to write some things on the other page and hoped that the suggestions that are popping up during writing would help me, but they did not.

So, can someone help me out with this of point me in the right direction?

It sounds like you’re having trouble with RelativeLayout in your .NET MAUI project. In .NET MAUI, RelativeLayout has been replaced by Grid and StackLayout for layout management. I recommend using these layouts instead. You can find plenty of tutorials on using Grid and StackLayout in .NET MAUI. For specific issues, make sure all your project references are correct and that you're using the latest version of .NET MAUI. Checking official documentation or community forums can also provide additional help.

 

[danmilller10]

Hello,

I am very new to programming. I decided to start with visual studio 2022 and watch some tutorials to get started. I would like to make a simple app for android, something like a notebook, so I choosed ' .net maui app ' as new project in VS 2022. I have been looking for a way to add a background to my app and I found RelativeLayout in many videos but it doesn't work with me.
I get an error but since I am new to programming, I don't really know where to look for a solution. The error is the following: the type 'RelativeLayout' was not found. Verify that you are not missing an assembly reference and that all referenced assemblies have been build.
I have tried to find a tutorial about this but I can't find it. I am probably looking wrong because I exctually don't really know what I am looking for.
In one of the videos they talked about the code behind so I tried to write some things on the other page and hoped that the suggestions that are popping up during writing would help me, but they did not.

So, can someone help me out with this of point me in the right direction?

It sounds like you're on the right track, but the issue might be that RelativeLayout isn't available in .NET MAUI. In .NET MAUI, you can use layouts like Grid, StackLayout, or AbsoluteLayout instead. Try switching to one of those, and it should resolve the error. Also, make sure you're targeting the correct frameworks for Android in your project settings. You can find great tutorials on .NET MAUI layouts on Microsoft's documentation site. Keep going, you're doing great!