I am creating a Visual Studio solution and am trying to add namespaces Kafka.Client, Kafka.Client.Producers.Parititioning, Kafka.Client.IntegrationTests, etc. to a program file I've created with a Main() method. I have Kafka.Client and Kafka.Client.IntegrationTests in the References of this program file as per Solution Explorer. The code is as follows:
using Kafka.Client;
using Kafka.Client.IntegrationTests;
using Kafka.Client.Producers.Partitioning;
using Kafka.Client.Utils;
using Kafka.Client.ZooKeeperIntegration;
namespace ConsoleApplication2 {
class Program {
static void Main(string[] args) {
//code here
}
}
}
The problem is that when I try to "Rebuild solution" or "debug solution", the aforementioned "using" lines give the error "The type or namespace name 'Kafka' could not be found (are you missing a using directive or an assembly reference?)" I've spent quite a long time on this and would appreciate some pointers about what I would need to do.
using doesn't actually "include" anything into your project. It just makes it so you don't always have to type out the full namespace. So the error is clearly in referencing the other project.
The Kafka project has to be built first. So first make sure you can successfully build the Kafka project.
if the Kafka is not in the same project, make sure you've add the the reference to the dll, and make sure "copy local" is true
to add the dll as a reference, right-click ConsoleApplication2 in the solution explorer, click add reference, then browse to and locate the actual dll output by the kafka project.
Sounds like these are separate class libraries or other projects. If that's the case, add a project reference from your main project and the using statements will then work.
The reason you want to add them as a project reference, and not a dll reference is that you'll likely switch back and forth from debug/release mode and you might end up with an outdated reference.
Thanks for trying to answer the questions. My problem was that the "Target application" was not the same for all the projects in my solution. Right-clicking on the referenced projects and selecting "Properties" enabled me to change the target application. Then I needed to rebuild the .dll files to run the program properly.
Related
I create a new solution called "WordpressAutomation"
I create a new project, a class library, called "WordpressAutomation" in this solution
I create a new project, a unit test project, called WordpressTests in this solution
I add a reference to the project WordpressAutomation in the project WordpressTests"
This should be ok, shouldn't it?
However, as can be seen from the screenshot, when adding this using line in a class in the project WordpressTests,
the reference doesn't work. Even though it is there, as can plainly be seen.
When entering "using", the class library "WordpressAutomation" doesn't appear among the alternatives.
And I get this error message when trying to run:
"The type or namespace "WordpressAutomation" could not be found (are you missing a using directive or an assembly reference?)"
Why is this happening? The reference is clearly there?
http://i.stack.imgur.com/L0g5R.png
Your project isn't actually including the .cs files to compile; they are only shown for information (they should appear as solid files with the C# logo):
Right click on these files and include them in the project. Then check what namespace they declare inside them. At the moment, your WordpressAutomation project simply doesn't contain any types.
I have a .dll file which is in another folder from where my project is. I add the reference to this library into my project and then when I try to use(import) it using QRlib; I get the following: The type or namespace name 'QRlib' could not be found(are you missing a using directive or an assembly reference?)
I was given the library file, so it's not me who implemented it, but I have to use it (and I am pretty sure there are no problems with it). What might be the problem ?
In solution explorer window of visual studio, expand nodes like this
project node=>"reference" node
Double click the dll name you added. This will open the object browser window where you will find all namespaces, class and methods.
Look at the lib in decompiler (dotPeek for example) and check what are the namespaces. Maybe you are using wrong namespace?
I am on .NET Framework 4.0, building a C# web application in VisualStudio 2012. I have Microsoft.VisualBasic added as a reference to the project. I am having trouble with the following line of code:
using Microsoft.VisualBasic.FileIO;
Building the solution returns the error: The type or namespace name 'FileIO' does not exist in the namespace 'Microsoft.VisualBasic' (are you missing an assembly reference?)
I have removed and re-added the reference to the assembly Microsoft.VisualBasic, but still get the error. Microsoft.VisualBasic is in the GAC, as well as Microsoft.VisualBasic.Compatibility, Microsoft.VisualBasic.Compatibility, Microsoft.VisualBasic.PowerPacks.Vs, and Microsoft.VisualBasic.Vsa.
Please let me know how to get VS2012 to recognize the FileIO namespace.
Right-click on your project and select Add Reference...
In the Reference Manager, expand Assemblies and select Framework. Then check the box for Microsoft.VisualBasic and click OK.
I had similar issue, fixed by change TargetFramework (in .csproj) from netstandard2.0 to netcoreapp3.0.
Application references are not available to uncompiled files in your application (aspx, ashx). There are two solutions to this issue as follows:
1) Move your code to a compiled part of the application (cs/vb file)
or
2) Add the reference to the web config
My reference was in an ashx file. I simply copied the code from the ashx file to the clipboard, deleted the file from the project, added a new Generic Handler (right click in Visual Studio > Add > Generic Handler), entered the same name as before, and pasted the code from the clipboard into the cs file editor that Visual Studio opened. I now have a cs file that will compile with the project and use the project reference. The file name is the same, so there is no need to update anything else -- just rebuild and deploy.
I get this error message in Visual Studio when I'm trying to run the C# code:
The type or namespace name 'Shape' could not be found (are you missing a using directive or an assembly reference?)
Is this because I changed the location of some files in the Solution Explorer? From the beginning I had the files in a folder and then I moved them outside and erased the folder. I have tried to use rebuild solution and clean, but I still get this error.
Now I have all files in the same "level" in the Solution Explorer. What can I do to get it to work again?
A few things to try:
Make sure the class file containing the Shape class is marked as "Include in project" in the Solution Explorer.
In the file with the error, make sure you have an appropriate using statement referencing the namespace where the Shape class is located.
If the Shape class is in an external DLL, make sure it is referenced in your project.
Double-check what the namespace is for the class file that contains the Shape class. Depending on how you moved those files around, it may have changed and you will need to update the using statement where you use it.
This can be caused by many things. e.g. public, assembly referencing, and in a project or a solution folder. JohnFx has already handled some of these in his reply. But to get you "going" do the following:
Move all of the files into the same project within the solution. So you solution has a project and all of the files are in that one project.
This should at least get you going. Then experiment.
Good luck.
I have a three projects in the solution WinSync. I have WinSyncGui, WinSyncLib and Setup. WinSyncGui requires files from WinSyncLib. How can I get it to include WinSyncLib in WinSyncGui?
VS complains The type or namespace name 'WinSyncLib' could not be found (are you missing a using directive or an assembly reference?)
I've set the dependencies so that WinSyncGui depends on WinSyncLib (so Lib is built first), but it's still not working.
Right click your project (WebSyncGui) and select Add Reference, Projects tab, and then select the project you need to reference.
You need to add WinSyncLib as a reference in your WinSyncGui project.
Adding a project reference.
I've set the dependencies
That sounds wrong. Did you set the "dependencies" or did you set the "references". Dependencies just determine build order, references are used to link projects.
Are you sure all of the types are public? if you omit the modifier, it's internal by default.
Right click on solution, choose Project dependencies and set dependencies whatever you want. It's useful, for example, when you have two exe files in one solution. It's bizzare to add another exe as reference, so I use this option to firstly build depended executable, and then post-build event is copying it into target directory. Very useful toy.