I'm using LINQ to SQL as my data access layer for a new project. I have added my database tables to the designer and all is well.
Whenever I use one of these classes in a function, Visual Studio warns me that 'Type xxxx is not CLS-compliant' or that 'Return type of function xxxx is not CLS-compliant'
Is this a problem with the classes that LINQ to SQL generates? Does it matters? Can I disable these warnings anywhere? My VS error list is clogged up with these warnings making it hard to see anything else.
EDIT:
Sorry, I should have mentioned these are VB.NET projects. :)
I found this link on MSDN Connect:
When adding inheritance relations
between classes in the O/R designer,
the acess level on the generated
backing store member of the Id
attribute, "_Id", is changed from
private to protected, causing the CLS
rule violation. The Id property is
used in an association between the
classes.
If you want to get rid of the warnings, you can use:
#pragma warning disable 3021
Or, if you want to disable them project-wide, add 3021 to the "Suppress warnings" field in the Build tab of your project's properties in Visual Studio.
Ben M has the right idea on the problem.
The quickest way to solve this on a VB.Net project is to make the assembly not CLSCompliant and hence avoid those warnings. Adding the following line to any of your files will do the trick
<Assembly: CLSCompliant(False)>
Best file to add it into is AssemblyInfo.vb inside of the "My Project" folder.
It ultimately depends on what types are being returned by your database and what the names of those types are.
One issue regarding CLS compliance is a type that has two publicly exposed members which differ in name only by case, e.g. MyField and myField.
Here's an article that should help you determine where your CSS compliance issues are occuring and deal with the issues. If you need more help, pose some code and we'll see what we can do.
I usually see that error when I'm consuming types from one assembly which does not have the CLSCompliant attribute in another assembly which does.
That is, are your Linq to SQL classes in a different project than the functions you're writing? Have you specified [assembly: CLSCompliant(true)] in some but not all of the projects in your solution?
Related
Is there a list of all the predefined defines that Visual Studio declares for you when you compile a project?
Obviously DEBUG or RELEASE are quite obvious but is there other defines that get declared automatically, for example when creating a Console Application or a Window Application or if the resulting assembly will be a DLL or an exe file.
Is there a list that contains them all?
It's just a bunch of properties set up in .NET framework .target files. To figure what exactly you need - you could track down chain of called targets and see what exactly affect one or another output.
And if you dig deeper - you will see that there is pretty big list and it also condition'ed - some properties defined if other properties set to specific value etc.
What exactly you want to do with such list ? Do you want it just for studying or you have concrete task?
I am trying to use the generic DbSet class. I have tried adding the following references so far to my solution because the MSDN documentation states that DbSet lives inside System.Data.Entity:
However, as shown below I still cannot add a reference to System.Data.Entity, the only suggestion intellisense has is EntityClient which does not contain DbSet:
Resharper/Intellisense is not giving me any other suggestions of namespaces I could possibly add.
I have tried cleaning and rebuilding my solution, and I am using the .Net Framework 4 full version (not the client version).
I have tried using NuGet to search for EntityFramework and have found one result which I have added to no avail as is show below:
What DLL file do I need to add to my solution to add a reference to System.Data.Entity and use the DbSet class?
Thanks
The same MSDN reference page that you mention says that you need to reference EntityFramework.dll in your project.
Note that namespaces and assemblies are not the same thing. The following statement is a little over-simplified, but you can think of namespaces as residing inside (or becoming available by referencing) an assembly.
So, once you've referenced the assembly, you will still need the using System.Data.Entity; directive.
I have a solution that contains many projects all using the same root namespace. No code files explicitly name a namespace. So lets say the root namespace is ExampleRootNamespace.
Now a problem comes into play when I want to add an explicitly named namespace to one of the code files I am working on. I want to be able to isolate this code from the rest of the assembly to be able to run FxCop against it. So I add something like Namespace Interfaces.CSV to the code file.
This causes any code that references this assembly to need to say Imports ExampleRootNamespace.Interfaces.CSV. So far so good. I can even run FxCop against the assembly. The problem now is that in other assemblies I cannot say any longer things like:
Public class frmInputBoolean Inherits
ExampleRootNameSpace.frmFormTemplate
Visual Studio is now asking me to rename the namespace to:
Public class frmInputBoolean Inherits
Global.ExampleRootNameSpace.frmFormTemplate
There are hundreds of errors related to this. So my questions are:
1) Why would basically naming a namespace under the root for the first time cause issues with the program?
2) Are there any workarounds to this issue without renaming?
I also want to add that with regards to ExampleRootNamespace.Interfaces.CSV I am not referencing this anywhere in the codebase. I'm currently just referencing it from a unit test project. So I don't see why adding this namespace causes an issue.
In C# try utilizing the USING operator with your namespace.
using ExampleRootNamespace = newExampleRootNamespace;
On the ones that have the global issue.
sadly, I do not believe an easy solution exists for you in VB.NET
Well, it appears this may be a bug in Visual Studio 2008. As the code has not changed but the problem with the required Global prefix is no longer there.
I say this because I checked out one of the offending code files and tried to add (as Meakins suggested):
Imports ExampleRootNamespace = Global.ExampleRootNamespace
When I did this two things happened.
1) The error highlighting and error correction suggestions were removed and ExampleRootNamespace was recognized by Visual Studio. Also the code now compiles.
2) Imports ExampleRootNamespace = Global.ExampleRootNamespace is not valid because of the use of Global in the imports statement. Visual studio says: "'Global' not allowed in this context; identifier expected." This Means that this line of code will not compile. So I removed it all together. Oddly enough despite it not being there (and thus the code returning to as before) there are no more errors.
I also restarted visual studio (but after doing the above). This is quite odd if you ask me!
I have VB.NET code in Visual Studio 2008 using an obsolete method and would like to suppress the warning. Unfortunately, following the recommendation is not a good solution, because it requires using a different class, which works differently, in important ways.
I'm trying to suppress the warning using System.Diagnostics.CodeAnalysis.SuppressMessage, but I don't know what to write as the parameters for the attribute and can't find any relevant reference.
I should also say that, right-clicking on the error in the error list I don't have any 'Suppress Message' option.
If you're using Visual Studio you can do the following.
Right click on the project and select "unload"
Right click on the project and select "Edit SomeProjectName.vbproj"
You should see two XML element tags with the name "NoWarn". Add the number 40000 to the list of numbers already present (make sure to do this for every NoWarn tag in the file)
Save the file
Right click on the project and select reload (you'll have to close the .vbproj file)
This will get rid of the warning. The number 40000 is the VB.Net error number for the obselete warning. You can suppress any warning in this fashion.
Note: If the NoWarn tag is not present, add it to the main PropertyGroup element with the following values
<NoWarn>40000</NoWarn>
In VS.NET you can right click on and suppress code analysis warnings. This will add the attribute for you.
However, the "don't use obsolete APIs" warning is not coming from code analysis, and so the SurpressMessage attibute won't work. This is a compiler warning.
For VS.NET you'd need to switch off this warning with...
/nowarn:0618
... at the command line (or just adding "0618" into the Suppress Warnings field on the csproj properties). You should do the same with whatever the VB warning number is.
I was able to resolve this with JaredPar's answer in my VB Project, thanks!
I did had same warning for my C# test project that I got removed by adding 618 in suppress warning section of Build Tab in Project Properties.
Please remember the Error Codes for VB and C# are different.
If one want to correct the these warnings then one need to install and use ODP.NET for Microsoft OracleClient Developers
Microsoft is deprecating System.Data.OracleClient, also known as Microsoft OracleClient. Microsoft OracleClient provider developers can use this opportunity to reevaluate which data provider to use for current and upcoming projects. Oracle recommends to start building new Oracle .NET applications with Oracle Data Provider for .NET (ODP.NET) and migrate existing applications to ODP.NET.
http://www.oracle.com/technetwork/topics/dotnet/index-085703.html
There is Aliases feature in C# that allows to work with different assemblies, containing equally named entities (classes, structures, enums). It is activated when you choose an assembly an referenced assemblies list. But I can't see any similar in VB.NET project. Is there such a feature in VB.NET? If no, why?
Imports Data = System.Data
Will allow you to use:
Data.SqlClient
Similar to what you've seen in C#. Here is a blog post that discusses the usage. Here is an older one that laments another feature C# has that VB.NET doesn't (didn't?)
I think you are talking about the /reference:alias=filename option accepted by the C# compiler. That allows you to rename the root namespace of the assembly. Very handy when you need to reference both an old and a new version of an assembly that otherwise contain classes with the same namespace and class names. Without that option, you'd always get an ambiguous identifier compile error. The namespace alias feature can't fix that.
No, VB.NET doesn't have that. Why? Ask at connect.microsoft.com.
This is an example for how to do it, in both C# and VB.NET