I have received a .dll file from a partner firm with an API that will be used for database logging. I have added it to the references and can see it in the Solution Explorer. The documentation provided gave me a code snippet which references the file with a different namespace than the file name. I am using Visual Studio 2013 Express.
using com.XXXXX.XXX.microsites.api;
When I want to use the EntityFramework, it is simply the name of the reference.
using Microsoft.AspNet.Identity.EntityFramework;
The reference is not even showing up with a different name when using IntelliSense.
I am using the recommend framework ASP.NET 4 in the documentation.
I am using the code snippet they provided.
I would personally use dotPeek (https://www.jetbrains.com/decompiler/) to decompile the assembly and see what the defined namespaces are. Not sure if there's anything build in to Visual Studio.
If you added the dll reference in your solution then try opening the dll in object browser and see if you see the namespaces listed there and then use the one needed.
Related
I am working on a project that will need to ability to download youtube videos. I found this project on github:
https://github.com/flagbug/YoutubeExtractor
My project already has a namespace. How would I import the YoutubeExtractor into my project? Do I need to change the namespace for it before (or after) importing it? Or is it up to me, in which case, what are the advantages and disadvantages to changing the namespace vs. not changing it? I am using VS Express 2012, if that matters.
My project already has a namespace. How would I import the YoutubeExtractor into my project?
You add reference to the external assembly (in this particular case you install the NuGet) and then add using statement with the correct namespace (YoutubeExtractor) in which the classes are defined.
So just follow the steps described on the home page:
Install-Package YoutubeExtractor
and then:
using YoutubeExtractor;
and finally:
// Our test youtube link
string link = "insert youtube link";
/*
* Get the available video formats.
* We'll work with them in the video and audio download examples.
*/
IEnumerable<VideoInfo> videoInfos = DownloadUrlResolver.GetDownloadUrls(link);
Open the project that exists for the YouTubeExtractor and build it.
Move the outputted assembly to a location inside your project structure.
Add a reference to that assembly.
Add a using {namespace} to the files you want to use the extractor in.
Where {namespace} is the namespace it uses.
Further, it appears that there is a nuget package for it (you see that YoutubeExtractor.nuspec file in root). I would recommend installing nuget into Visual Studio and then searching nuget for the YouTubeExtractor. It's a lot easier, and you get updates with it easier as well.
I have to check the namespaces in a C# dll in a vb6.0 application. I am using "TypeLibInfo" to obtain the information of the dll. I am able to check the class name and method name but not the namespace.
How to obtain namespace of the DLL?
If you have access to Visual Studio, you can use the Object Browser to view the Namespaces, classes etc within an assembly.
If you don't, you might need to use a tool like Reflector, CodeReflect etc to do this.
I have a class library project which uses a namespace (e.g., "Cosmos.Creator.Util"). I then create a solution and windows forms application to test the library. From the windows form application, I add a reference to the library. So now I have two projects open in visual studio, a class library and a windows forms project. The forms project references the library.
When I edit my form's code, code autocompletion works correctly for the namespace that I use in the library. E.g., if I type "using Cosmos." I get autocomplete options like "Creator". But now if I build my solution, all of the "Cosmos" are red-underlined with the compile error: "The type or namespace name "Cosmos" could not be found (are you missing a using directive or an assembly reference?)".
For the purposes of the form application test, I placed my library code into a folder CosmosFormExample\Cosmos. When I check the reference from the form application, the reference is to CosmosFormExample\Cosmos\bin\Debug\Cosmos.dll, so that looks okay. I looked at the GUID referenced in the solution file and it matches the GUID of the project file Cosmos.csproj.
What has happened? How has the build caused my forms application to forget about the Cosmos namespace, despite the fact that it is still referencing the library project? Thanks much in advance.
Are you using VS2010 & .NET 4? If so you're probably using .NET 4 Client Profile instead of full fledged .NET 4. Go to project properties and check your Target Framework.
for more info: http://msdn.microsoft.com/en-us/library/cc656912.aspx
you need to check the framework you are using and the framework yout library was compiled for...
I am using VS2008. I have a project connect with a database and the connection string is read from App.config via ConfigurationManager. We are using L2E.
Now I added a helper project, AndeDataViewer, to have a simple UI to display data from the database for testing/verification purpose.
I don't want to create another set of Entity Data Model in the helper project. I just added all related files as a link in the new helper project.
When I compile, I got the following error:
Error 15 The name 'ConfigurationManager' does not exist in the current context C:\workspace\SystemSoftware\SystemSoftware\src\systeminfo\RuntimeInfo.cs 24 40 AndeDataViewer
I think I may need to add another project setting/config related file's link to the helper project from the main project? There is no App.config file in the new helper project. But it looks I cannot add that file's link to the helper project. Any ideas?
In your project, right-click, Add Reference... In the .NET tab, find the "System.Configuration" component name and click OK.
"using System.Configuration" tells the compiler/IntelliSense to search in that namespace for any classes you use. Otherwise you would have to use the full name (System.Configuration.ConfigurationManager) every time. But if you don't add the reference, that namespace/class will not be found anywhere.
Note that a DLL can have any namespace, so the file System.Configuration.dll could in theory have the namespace "Some.Random.Name". For clarity/consistency they're usually the same, but there are exceptions.
In case you get are trying to access the cloud configuration file in your Azure Cloud service and get the error
CloudConfigurationManager does not exist in the current context
on CloudConfigurationManager class, then all you need to do is add the nuget package Microsoft.WindowsAzure.ConfigurationManager to your project.
And then, make sure you include the using statement "using Microsoft.Azure" in the class where you’re trying to access the cloud configuration file.
Hope this helps!!
I think you're missing a reference to System.Configuration.dll or a using System.Configuration clause
I'm using Visual Studio and COM with C# for the first time and there's something I don't quite understand about the 'references'. How do you know what to reference with a given 'using something.something'? The .Net references seem fairly simple, but COM is less obvious. I'm running Visual Studio 2005 and have the latest VSTO installed, but for the life of me, I can't figure out what I need to reference to satisfy:
using Microsoft.VisualStudio.Tools.Applications.Runtime;
There are a few Microsoft.VisualStudio things in the .Net tab, but none that continue with .Tools or anything like it. I feel like I'm missing a key concept here.
There are two issues here -
First, a reference doesn't necessarily correspond to a namespace. A single reference can contain multiple namespaces, and a single namespace can be shared by multiple assemblies which would need to be referenced. Needing to include a reference allows you to use specific types, not entire namespaces.
Second, this is something you'll need to know in advance. If you're using Microsoft's classes, such as the ones in the namespace you listed, MSDN can be a great help.
For example, take Microsoft.VisualStudio.Tools.Applications.Runtime.ServerDocument
If you look at the MSDN page for this class (in that namespace), near the top it includes:
Namespace: Microsoft.VisualStudio.Tools.Applications.Runtime
Assembly: Microsoft.VisualStudio.Tools.Applications.Runtime (in microsoft.visualstudio.tools.applications.runtime.dll)
This specifically tells you which assembly is required.
That reference is part of the Visual Studio SDK. I am currently using VS 2008, but the assemblies should be the same for VS 2005. The link for the SDK is here.
Going the other way is pretty easy. If you're given a reference, you can open that reference in the object browser to see what namespaces it contains, and from that, determine what usings to add. Its not trivial to determine what to reference for a given using, as there's no guarantee that there exists exactly one DLL for each namespace. How is it that you arrived at a
using Microsoft.VisualStudio.Tools.Applications.Runtime;
Without knowing what to reference? If its a code sample somewhere, they ought to mention what the external references and dependencies of the project are.