I got all C# implementations on Google, so I converted it to VB.Net, but I am not able to convert 1 line where it gives error.
My Class :
Imports Migrator.Framework
[Migration(1)] ' Gives ERROR Here.. How to write this in VB.net ?
Public Class mig_001
Inherits Migration
Public Overrides Sub Up()
Database.AddTable("Planets",
New Column("Id", DbType.Int32, ColumnProperty.PrimaryKeyWithIdentity),
New Column("Name", DbType.String, 100, ColumnProperty.NotNull),
New Column("Diameter", DbType.Double),
New Column("Mass", DbType.Double),
New Column("SupportsLife", DbType.Boolean, False)
)
End Sub
Public Overrides Sub Down()
Database.RemoveTable("Planets")
End Sub
End Class
Once again :
[Migration(1)] => How to write this in VB.net and what does it means in VB.net ?
I read in an article that its mandatory for version of Migration, otherwise Migratordotnet will miss the migration.
So.. How to do it ?
Like this:
<Migration(1)> _
Public Class mig_001
This <…> feature, belonging to the following class, is called an attribute in .NET.
Related
I have a DLL file created in VB6. It contains a class named Product and that contains the following simple code:
Option Explicit
Private sDescription As String
Public Property Get Description() As String
Description = sDescription
End Property
Public Property Let Description(Value As String)
sDescription = Value
End Property
I want to use this DLL in VB.NET, which is nothing more than registering the DLL on my system and including the DLL file in the references. Visual Studio automatically generates an interop DLL to consume the COM DLL. This interop DLL generates interfaces for all classes. In VB.NET I want to create a new class that implements the Product interface from the interop DLL. So I code:
Imports myAssembly
Public Class NetProduct
Implements myAssembly.Product
Public Property Description As String Implements _Product.Description
Get
Throw New NotImplementedException()
End Get
Set(value As String)
Throw New NotImplementedException()
End Set
End Property
End Class
The property is auto-generated because I implemented the Product interface. But here comes the problem because when I start using the NetProduct class I get an error telling me this:
Method 'set_Description' in type 'myProject.NetProduct' from
assembly 'myProject, Version=1.0.0.0, Culture=neutral,
PublicKeyToken=null' does not have an implementation.
The problem is that there is no method set_Description in the interface. When I view the definition of the Product interface it shows me the following:
Imports System.Runtime.InteropServices
Namespace myAssembly
<CoClass(GetType(ProductClass))> <Guid("49CE2F98-931C-441B-B322-9F39B6D6F212")>
Public Interface Product
Implements _Product
End Interface
End Namespace
The definition of the _Product interface is:
Imports System.Runtime.InteropServices
Namespace myAssembly
<Guid("49CE2F98-931C-441B-B322-9F39B6D6F212")> <TypeLibTypeAttribute(4304)>
Public Interface _Product <DispId(1745027072)>
Property Description As String
End Interface
End Namespace
When I use the interface myAssembly.Product directly to create a new object then everything works as you would expect. The property does not pose a problem there. But when I implement the interface in a .NET class the problem arises.
How do I solve this?
[update 1] After creating a method Set_Description I see the following error appear:
property 'Description' implicitly defines 'set_Description', which
conflicts with a member of the same name in class 'NetProduct'.
This must have something to do with my problem, although I don't know what it is. I already tried completing the property to make sure the Throw New NotImplementedException() wouldn't be in the way but that didn't make the error go away. My code builds just fine by the way. The error I gave earlier is a runtime error. Not a build error.
Private myDescription As String
Public Property Description As String Implements Product.Description
Get
Return myDescription
End Get
Set(value As String)
myDescription = value
End Set
End Property
[update 2] I have used JetBrains DotPeek to disassemble the interop.dll that Visual Studio generates. Disassembly is coded in C#. It contains 2 interfaces and 1 class for the single Product class from VB6. Here are all details.
I'll start with the Product class itself.
using System.Runtime.CompilerServices;
using System.Runtime.InteropServices;
namespace myAssembly
{
[ClassInterface(0)]
[Guid("C54B96A8-1499-4B76-8508-0B732E551326")]
[TypeLibType(2)]
[ComImport]
public class ProductClass : _Product, Product
{
[MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)]
public extern ProductClass();
[DispId(1745027072)]
public virtual extern string Description { [DispId(1745027072), MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)] [return: MarshalAs(UnmanagedType.BStr)] get; [DispId(1745027072), MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)] [param: MarshalAs(UnmanagedType.BStr), In, Out] set; }
}
}
The ProductClass uses 2 interfaces. I don't understand why because one of those is just an implementation of the other. This is the Product interface.
using System.Runtime.InteropServices;
namespace myAssembly
{
[CoClass(typeof (ProductClass))]
[Guid("49CE2F98-931C-441B-B322-9F39B6D6F212")]
[ComImport]
public interface Product : _Product
{
}
}
And then we have the _Product interface. They even share the same Guid. It might have something to do with backwards compatibility.
using System.Runtime.CompilerServices;
using System.Runtime.InteropServices;
namespace myAssembly
{
[Guid("49CE2F98-931C-441B-B322-9F39B6D6F212")]
[TypeLibType(4304)]
[ComImport]
public interface _Product
{
[DispId(1745027072)]
string Description { [DispId(1745027072), MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)] [return: MarshalAs(UnmanagedType.BStr)] get; [DispId(1745027072), MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)] [param: MarshalAs(UnmanagedType.BStr), In, Out] set; }
}
}
This is all I could find. Still no clue where the error for Set_Description comes from.
[Update 3] Example code
The code for the VB6 class is on top of this question. Nothing fancy there. The code for testing implementation in .NET is like this:
Imports myAssembly
Public Class NetProduct
Implements myAssembly.Product
Private myDescription As String
Public Property Description As String Implements Product.Description
Get
Return myDescription
End Get
Set(value As String)
myDescription = value
End Set
End Property
End Class
To test the NetProduct class I dropped a Button on a Form and create an instance of the class when the button is being clicked.
Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click '<- Error happens here, so on loading the datatype!
Dim Product As New NetProduct 'Error does NOT happen here.
End Sub
The whole project compiles without errors. The project even runs without errors UNTIL you click the button. Probably because the NetProduct type is first loaded on that point.
I used a console app to do my test. Other than that, my VB.NET code is basically identical to yours in update 3. The VB.NET properties were auto-generated by VS with the stub Throw New NotImplementedException() after using the Implements statement :
Imports OurCOMDll
Class TestClass
Implements OurCOMDll.ClassInCOMDll
Dim msStringProperty As String = String.Empty
Public Property StringProperty As String Implements _ClassInCOMDll.StringProperty
Get
StringProperty= msStringProperty
End Get
Set(value As String)
msStringProperty = value
End Set
End Property
End Class
Module Module1
Sub Main()
Dim o As New OurCOMDll.ClassInCOMDll
o.StringProperty = "Hello World!"
Console.WriteLine(o.StringProperty) ' Outputs 'Hello World!' as expected
Console.ReadLine()
End Sub
End Module
Same is true for the VB6 code. The string property is implemented like yours.
Distinguishing factors so far:
VS 2019 vs. VS 2017
(Consuming) GUI vs. Console application
Different property names
I have the following in C# and I'm trying to convert it to vb.net.
internal class MyDataRow : List<DataRowItem>, IDataRow
{
}
The rest of the code I've managed to convert myself it's just the empty class that I'm struggling with. This is so I can read in files with any columns and display them.
Edit:
Looking at the comment given and online I've got to the following:
Class MyDataRow
Inherits List(Of DataRowItem)
Implements IDataRow
End Class
I'm getting an error on the implements section.
This gives the following errors:
If you are just trying to convert this class, you can use below codes:
Friend Class MyDataRow
Inherits List(Of DataRowItem)
Implements IDataRow
End Class
And you have to implement IDataRow interface methods as well
Hi I am using unity in WebAPI 1.0 and registered it under Global.asax.vb file as below
Dim container As IUnityContainer = New UnityContainer()
container.RegisterType(Of Car)(New InjectionConstructor(GetType(Integer)))
Now how do i pass integer value which is passed by the client application into car type using
Public Sub New(ByVal intUserId As Int32)
objCar = DependencyResolver.Current.GetService(Of car)()
End Sub
Can't find anything to use (ParameterOverride("intUserId", intUserId) within DependencyResolver
It is very similar as registering unity container with ASP.NET MVC. Though web api has a different execution pipe line. Follow these steps.
NB: I have converted this code from C# to VB using a converter. So I hope it is syntactically correct. Though it is accurate in c#.
1) Implement IDependencyResolver (Make sure you are resolving correct namespace here. IDependencyResolver should come from System.Web.Http.Dependencies. Make note of Imported namespaces.
Imports System.Collections.Generic
Imports System.Linq
Imports System.Web
Imports Microsoft.Practices.Unity
Imports System.Web.Http.Dependencies
Namespace YourNamespace.Framework
Public Class UnityApiDependencyResolver
Implements IDependencyResolver
Private _container As IUnityContainer = Nothing
Public Sub New(container As IUnityContainer)
Me._container = container
End Sub
Public Function GetService(serviceType As Type) As Object
Try
Return _container.Resolve(serviceType)
Catch generatedExceptionName As Exception
Return Nothing
End Try
End Function
Public Function GetServices(serviceType As Type) As IEnumerable(Of Object)
Try
Return _container.ResolveAll(serviceType)
Catch generatedExceptionName As Exception
Return Nothing
End Try
End Function
Public Function BeginScope() As IDependencyScope
Return Me
End Function
Public Sub Dispose()
'
End Sub
End Class
End Namespace
'=======================================================
'Service provided by Telerik (www.telerik.com)
'Conversion powered by NRefactory.
'Twitter: #telerik
'Facebook: facebook.com/telerik
'=======================================================
2) Configure your container either thgough config or through code.
3) Register your container in Global.asax.vb file
Dim container = New UnityContainer()
Dim section As UnityConfigurationSection = TryCast(ConfigurationManager.GetSection("unity"), UnityConfigurationSection)
section.Configure(container, "UnitySection")
'api dependency resolver
GlobalConfiguration.Configuration.DependencyResolver = New UnityApiDependencyResolver(container)
'=======================================================
'Service provided by Telerik (www.telerik.com)
'Conversion powered by NRefactory.
'Twitter: #telerik
'Facebook: facebook.com/telerik
'=======================================================
Thats it.
Now you can declare your dependency in any of your API controller and it will be injected by Unity
Public Sub New(repositoryFactory As IRepositoryFactory, serviceFactory As IServiceFactory)
Me.repositoryFactory = repositoryFactory
Me.serviceFactory = serviceFactory
End Sub
'=======================================================
'Service provided by Telerik (www.telerik.com)
'Conversion powered by NRefactory.
'Twitter: #telerik
'Facebook: facebook.com/telerik
'=======================================================
Your type registration is wrong as well. you have to specify either an interface or an abstract class as dependency and its concrete implementation as its mapping.
e.g
container.RegisterType(Of IContext, Context)()
I don't understand what are trying to achieve by mapping an integer value to car. Do you want car object to be loaded based on integer value in your parameter?
Code below will not compile. Line with New SchemaExport(cfg).Create(True, True) - expression does not produce a value.
I'm new to Nhibernate. Am I missing something? This is a conversion of a code from C# which complies fine.
Imports System.Configuration
Imports FluentNHibernate.Cfg
Imports FluentNHibernate.Cfg.Db
Imports NHibernate
Imports NHibernate.Tool.hbm2ddl
Imports Ninject.Activation
Imports Ninject.Modules
Imports OSIM.Core
Imports Configuration = NHibernate.Cfg.Configuration
Public Class IntegrationTestsModule
Inherits NinjectModule
Public Overrides Sub Load()
Bind(Of IItemTypeRepository).To(Of ItemTypeRepository)()
Bind(Of ISessionFactory).ToProvider(New ntegrationTestSessionFactoryProvider)
End Sub
End Class
Class IntegrationTestSessionFactoryProvider
Inherits Provider(Of ISessionFactory)
Protected Overrides Function CreateInstance(context As IContext) As ISessionFactory
Dim sessionFactory = Fluently.Configure().
Database(MsSqlConfiguration.MsSql2008.ConnectionString(Function(c) c.Is(ConfigurationManager.AppSettings("localDb"))).ShowSql()). _
Mappings(Function(m) m.FluentMappings.AddFromAssemblyOf(Of ItemTypeMap)().ExportTo("C:\Temp")). _
ExposeConfiguration(Function(cfg) New SchemaExport(cfg).Create(True, True)).BuildSessionFactory()
Return sessionFactory
End Function
End Class
The ExposeConfiguration method is defined as follows (vb):
Public Function ExposeConfiguration(config As Action(Of Configuration)) As FluentConfiguration
It takes an instance of Action(Of Configuration). You must change Function to Sub like this:
ExposeConfiguration(Sub(cfg) New SchemaExport(cfg).Create(True, True)).BuildSessionFactory()
Came here with same question, but inline code above not working -- possibly because of NHIbernate updates.
Error was: "Expression does not produce a value".
I reckon NHibernate modified the SchemaExport tool in the meantime?
Anyways, here's a working code with NHibernate 5.2.0.0
For those new to lambda functions, please note the newlines
Dim fluentConfig = Fluently.Configure() _
.Database(SQLiteConfiguration.Standard.UsingFile("hibernatetest.db")) _
.Mappings(Function(m) m.FluentMappings.AddFromAssembly(Assembly.GetExecutingAssembly())) _
.ExposeConfiguration(Sub(cfg)
Dim se = New SchemaExport(cfg)
se.Execute(True, True, False)
End Sub) _
.BuildSessionFactory()
Hope it helps.
I am trying to make my own Labeller plugin for Cruise Control .Net 1.4.3. I have made a class based on another plug in example but I keep getting an error
Class 'AssemblyVersionLabeller' must implement 'Function Generate(integrationResult As IIntegrationResult) As String' for interface 'ThoughtWorks.CruiseControl.Core.ILabeller'
Here is my code :
Imports Exortech.NetReflector
Imports ThoughtWorks.CruiseControl.Core
Imports ThoughtWorks.CruiseControl.Core.Util
Namespace NetAssembly.CCNet.Label
_
Public Class AssemblyVersionLabeller
Implements ILabeller
Public Sub Run(ByVal result As IIntegrationResult)
result.Label = Generate(result)
End Sub
Public Function Generate(ByVal integrationResult As IIntegrationResult) As String
Dim label As String = integrationResult.LastIntegration.Label
Return label
End Function
<ReflectorProperty("prefix", Required:=False)> _
Public Prefix As String = String.Empty
End Class
End Namespace
What am I doing wrong? What have I missed?
Background Info:
I am using VS2005. I cant use CrusieControl 1.4.4 RC2 (which has an Assembly Labeller) because my source control's plugin (SCM Anywhere) doesnt work with it.
I cannot judge just by looking at your code, but if you need a sample on how to write labellers (C# code though), you could take a look at BrekiLabeller code (written by me).
I believe you forgot the overrides decleration..
Public Overrides Function Generate