I'm trying to migrate my Xamarin project to Maui and I got stuck on finding the equivalent namespace to Android.App.Application.Context on Maui project. The DatabaseHelper class has the following path: MyProject -> Platforms -> Android -> Helpers.
Does anyone know what is the equivalent namespace to Android.App.Application.Context on Maui?
CS0234: The type or namespace name 'App' does not exist in the namespace 'AAT.Platforms.Android' (are you missing an assembly reference?)
Picture of error
Thanks!
The error message is (indirectly) telling you what is wrong:
The type or namespace name 'App' does not exist in the namespace 'AAT.Platforms.Android'.
This is happening because you are in namespace AAT.Platforms.Android.Helpers, which means that Android is assumed to mean AAT.Platforms.Android.
Here are two ways to access Android.App.Application.Context in this situation:
global::Android.App.Application.Context OR
using AndroidApp = Android.App.Application;
AndroidApp.Context
Try changing your namespace to another thing that doesn't include Android. Because it's trying to find the class inside your namespace instead of the correct one. So I'd advise you to use Droid instead of Android in your namespace, i.e. AAT.Platforms.Droid.Helpers.
HIH
Related
how i can fix this problem??
help me
Compiler Error Message: CS0246: The type or namespace name 'MySql' could not be found (are you missing a using directive or an assembly reference?)
Line 1: using MySql.Data.MySqlClient;
Apologies if this is not the case but working on the assumption that you're developing in a version of Visual Studio, check the project references.
If MySql.Data exists in the references but has the warning (yellow triangle) indicator next to it then you may need to re-reference the .dll from its location in your filesystem.
Alternatively, you can grab this from the Nuget package manager if it is not available locally.
Despite the full namespace qualification, the library must be correctly referenced for the object namespace to be recognised in the IDE.
Let us know what IDE you're using if not VS.
I'm trying to build my first ASP.NET Web Forms project but I'm facing some serious problem.
I created two project files in my project named: BLL and DAL.
I created classes named class.cs and class1.cs in both the above files respectively. When I add using System.Data; in any of the .cs files, it displays the following errors:
1: Error CS0234 The type or namespace name 'Data' does not exist in the namespace 'System' (are you missing an assembly reference?) DAL..NET Platform 5.4
2. Error CS0234 The type or namespace name 'Data' does not exist in the namespace 'System' (are you missing an assembly reference?) BLL..NET Platform 5.4
I tried adding assembly references by right click on references -> Add reference -> Checking System.Data and rebuilding it again but it didn't help me.
When I hover mouse over using System.Data; it displays the following thing:
First when you hover your "System.Data" it shows a message, which is pretty much straight forward to understand that you haven't used any classes of System.Data. When you implement those classes, this message will disappear.
Second, You got an error -
Error CS0234 The type or namespace name 'Data' does not exist in
the namespace 'System' (are you missing an assembly reference?)
DAL..NET Platform 5.4
So basically you have to have an assembly refernce of System.Data into your project.
Go to References and check whether System.Data Assembly exist or not. If not then install it.
Hope this will help you.
You are simply missing the "System.Data" reference.
In Solutions Explorer window right click on the 'Reference' entry -> Press Add Reference -> click on Assemblies > Search for 'System.Data' -> press the check box ( I always forget this step.) -> press OK.
your namespace and class name is same,
rename your class name.
When I want to write code with the YouTube API, I get these errors in namespace
using Google.Apis.YouTube.v3;
using Google.Apis.YouTube.v3.Data;
Error 1 The type or namespace name 'v3' does not exist in the
namespace 'Google.Apis.YouTube' (are you missing an assembly
reference?)
Error 2 The type or namespace name 'v3' does not exist in the
namespace 'Google.Apis.YouTube' (are you missing an assembly
reference?)
it seems these "v3" tags does not exist so please help me
In order to make sure you have the correct libraries and dependencies, try downloading the Google.Apis.YouTube.v3 Client Library through NuGet. Here is what you do:
and then enter Install-Package Google.Apis.YouTube.v3 into the console and press enter. You should see something like this:
After the install completes, the references should have been added to the project that you have open and all you need to do is add your using statements:
using Google.Apis.YouTube.v3;
using Google.Apis.YouTube.v3.Data;
On Windows Phone 8.1, in an C# project, I want to get the device ID via -> DeviceExtendedProperties
So I might want to do it like
using Microsoft.Phone.Info;
DeviceExtendedProperties.GetValue("DeviceUniqueId");
or
Microsoft.Phone.Info.DeviceExtendedProperties.GetValue("DeviceUniqueId");
The problem is, either way didn't compile,
I don't know what I'm missing.
It says it was supported in WP8.1
This is the error when I use the name space at the top of the file:
using Microsoft.Phone.Info;
error CS0234: The type or namespace name 'Phone' does not exist in the namespace 'Microsoft' (are you missing an assembly reference?)
Same error when I call the function directly
Microsoft.Phone.Info.DeviceExtendedProperties.GetValue("DeviceUniqueId");
I find the answer,
Add the namespace at object browser.
anyway, thank you guys for the answer.
I have a .Net 4.0 project, which has a class named Common to do somethings like getQueryString, GetKey, etc.
When I installed the latest Quartz.Net for my Project, I started getting error messages that I'm missing namespace Common in my project.
Here's the actual error message:
error CS0234: The type or namespace name 'QueryString' does not exist
in the namespace 'Common' (are you missing an assembly reference?)
Quartz probably has a namespace or subnamespace called Common and now you have a conflict.
You can try to find every problematic instance and either remove the Quartz using OR qualify your class name fully (that means using the full name including it's namespace).
Or you could remove Quartz, rename your own class to something more fitting and non-generic than "Common" and then install Quartz again. The removal and reinstallation of Quartz will make it easier to rename your class using the rename class feature of Visual Studio.