I'm writing a program in VB.NET and try to save different profiles via the application settings (project settings -> settings tab).
I created a Profile class and a collection class of that. If I choose this collection as settings type, I can add multiple objects with type System.Object, but I need to add my Profile object.
How can I add a collection of my Profile objects with the settings editor? Whats wrong with my code?
Profile.vb
Imports System.Configuration
<SettingsSerializeAs(Configuration.SettingsSerializeAs.Xml)> _
Public Class Profile
Public Property Name As String
Public Property ViewerCommand As String
Public Property ViewerPath As String
Public Property StartService As Boolean
Public Property StopService As Boolean
End Class
<SettingsSerializeAs(Configuration.SettingsSerializeAs.Xml)> _
Public Class ProfileCollection
Inherits CollectionBase
Public Shadows Function Add(ByVal ProfileObject As Profile) As Profile
MyBase.List.Add(ProfileObject)
Return ProfileObject
End Function
Public Shadows Sub Remove(ByVal ProfileObject As Profile)
MyBase.List.Remove(ProfileObject)
End Sub
End Class
A screenshot of the current behavior
The type is VNC_Manager.ProfileCollection for the setting called "Profiles".
On the right side there should be Name, ViewerCommand, ...
If I use VNC_Manager.Profile for type, I also can't see Name, ViewerCommand... So there seems to be a problem with the Profile class(?)
Related
I've an old programm with edmx. Inside this one, I've linked a class (Table) To a View (Table/filter on a value of a column)
I want migrate this project to code first.
I copy/paste the project delete edmx file and generate models from an existing database.
All is good except this link.
<Table("JoinAffectation")>
partial public Class JointAffectation
public property Id as Long
public IdRecherche as Integer 'the link with my view
<NotMapped>
<ForeignKey("Id")>
PUBLIC OVERRIDABLE PROperty RechercheJoint as ViewRechercheJoint
But When I try to use function of automatical sort/filter using expression
I've error : The specified type member 'RechercheJoint' is not supported in LINQ to Entities. Only initializers, entity members, and entity navigation properties are supported.
If I removed I error saying I don't same comumn and property... Also , How Can I stipulate RechercheJoint is mapped on IdRecherche
thanks for your help
Finally Using modelbuilder, I can join my view and my table like in edmx
<Table("JointAffectation")>
Partial Public Class JointAffectation
Public Property Id As Long
Public Property IdTypeJoint As Long
Public Property IdRecherche As Integer
Public Overridable Property JointType As JointType
<ForeignKey("Id")>
Public Overridable Property RechercheJoint As ViewRechercheJoint
End Class
<Table("ViewRechercheJoint")>
Partial Public Class ViewRechercheJoint
<Key>
<DatabaseGenerated(DatabaseGeneratedOption.None)>
Public Property Id As Integer
<StringLength(50)>
Public Property Libelle As String
<ForeignKey("IdRecherche")>
Public Overridable Property JointAffectations As ICollection(Of JointAffectation)
End Class
modelBuilder.Entity(Of JointAffectation)() _
.HasRequired(Function(e) e.RechercheJoint) _
.WithMany(Function(e) e.JointAffectations) _
.HasForeignKey(Function(e) e.IdRecherche)
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 a custom control with a property that holds the name (full path) to a file location that exists on the target computer.
The exact path will vary according to type of target pc and is typically set right after I add the custom control to my Form, while I am still in design mode of my project, so that when my application runs, it picks up the filename from the property.
It would be convenient if the property opened a file dialog to let me browse to the location (similar to how dialogs are opened when browsing for image and color properties), but this doesn't seem to be possible in visual basic.
After googling for days I have found a couple of articles that touch the subject for other programming languages (see example snippet below) but I haven't been able to work out how to make it work for visual basic.
Here is a snippet I found that mentions the use of an editor, which may be a clue to get started.
[Editor(typeof(FileSelectorTypeEditor), typeof(UITypeEditor))]
public string Filename
{
get { return _filename; }
set { _filename = value; }
}
Hope someone out there can lead me in the right way.
FileSelectorTypeEditor is probably a custom class derived from either FileNameEditor or FolderNameEditor.
You can implement both, using the standard class or extend the default with your own, as you have seen in those C# sources you have found.
Here I'm using a specialized FileNameEditor class, named (with some lack of imagination) SpecializedFileNameEditor and the standard FolderNameEditor assigning the UITypeEditor to two properties of a class.
► The ImagePath property editor is the SpecializedFileNameEditor object, which uses an OpenFileDialog, where a filter is pre-selected. It also overrides the EditValue method, to set the current value, if any, of an associated property (here, ImagePath) as the InitialDirectory of the OpenFileDialog.
► The ImageFolder property editor is a standard FolderNameEditor, which opens a FolderBrowserDialog.
I'm also attaching an ExpandableObjectConverter type converter, so you can present the two properties as an expandable property selector in a PropertyGrid.
You can see an example here:
How to bind child Controls of a User Control to a Public Property
Imports System.ComponentModel
Imports System.Drawing.Design
Imports System.IO
Imports System.Windows.Forms
Imports System.Windows.Forms.Design
<TypeConverter(GetType(ExpandableObjectConverter))>
Public Class ImagePickerClass
Public Sub New()
' Initialize [...]
End Sub
<Editor(GetType(SpecializedFileNameEditor), GetType(UITypeEditor))>
Public Property ImagePath As String
<Editor(GetType(FolderNameEditor), GetType(UITypeEditor))>
Public Property ImageFolder As String
Public Class SpecializedFileNameEditor
Inherits FileNameEditor
Private currentValue As String = String.Empty
Public Overrides Function EditValue(context As ITypeDescriptorContext, provider As IServiceProvider, value As Object) As Object
If TypeOf value Is String Then
currentValue = DirectCast(value, String)
End If
Return MyBase.EditValue(context, provider, value)
End Function
Protected Overrides Sub InitializeDialog(ofd As OpenFileDialog)
MyBase.InitializeDialog(ofd)
If Not currentValue.Equals(String.Empty) Then
ofd.InitialDirectory = Path.GetDirectoryName(currentValue)
End If
ofd.Filter = "PNG Images (*.png)|*.png"
End Sub
End Class
End Class
I'm using VB.Net in Visual Studio 2012 for a project with a web service I can't change at all. The problem is that VB does not generate all the properties it should generate.
I added the web service as a reference service. According to the XSD, collectionRAEEDataType class should include properties as receiver, referenceNumber, sigCode. But, when I try to access them, two of them are not shown: sigCode and responsabilitySystemData.
I've contacted the support email of the web service and they tell me that yes, that in the Java service the class is generated with those fields:
public class CollectionRAEEDataType {
protected String sigCode;
protected RegisteredInfoDataType responsabilitySystemData;
...
}
But in Reference.vb I get this:
Partial Public Class collectionRAEEDataType
Inherits Object
Implements System.ComponentModel.INotifyPropertyChanged
Private itemField As Object
Private receiverField As receiverType
Private referenceNumberField As String
Private assignmentOfficeIdField As String
'''<remarks/>
<System.Xml.Serialization.XmlElementAttribute("responsabilitySystemData", GetType(registeredInfoDataType), Form:=System.Xml.Schema.XmlSchemaForm.Unqualified, Order:=0), _
System.Xml.Serialization.XmlElementAttribute("sigCode", GetType(collectionRAEEDataTypeSigCode), Form:=System.Xml.Schema.XmlSchemaForm.Unqualified, Order:=0)> _
Public Property Item() As Object
Get
Return Me.itemField
End Get
Set
Me.itemField = value
Me.RaisePropertyChanged("Item")
End Set
End Property
'''<remarks/>
<System.Xml.Serialization.XmlAttributeAttribute()> _
Public Property receiver() As receiverType
Get
Return Me.receiverField
End Get
Set
Me.receiverField = value
Me.RaisePropertyChanged("receiver")
End Set
End Property
...
As you can see, the property receiver is ok, but responsabilitySystemData and sigCode are not properties.
Do you know how could I solve this problem?
Thanks a lot.
I answer myself. I had to instantiate the Item field with the type I wanted, registeredInfoDataType or collectionRAEEDataTypeSigCode.
For example,
MyElement.Item = New registeredInfoDataType()
Thank you.
I'm building a webpart for Sharepoint 2010. I can create custom properties which are editable through the Sharepoint user interface. No problem there.
The problem is: I want to use a custom object(Properties.cs) to define those same properties(and keeping the editing functionality available), rather than dumping all code in the Webpart.cs like it's shown on the internet.
Is there a way to do this? Because I don't want to pump all my properties(editable or not) in the webpart class.
Yes, you can do it... by using inheritance and creating base classes as follows
1- first create a base class inheriting from WebPart class with override CreateChildControls method e.g
<XmlRoot("MyWebPartBase")> _
<ToolboxItemAttribute(True)> _
Public Class BaseWebPart
Inherits WebPart
Protected Overrides Sub CreateChildControls()
Dim control As Object = Page.LoadControl(ascxPath)
If control IsNot Nothing Then
control.WebPartControl = Me
Controls.Add(CType(control, Control))
End If
End Sub
'Add public properties here
End Class
2- Implement you properties in this base class and Inherent your webparts from above mentioned base class rather then webpart class.
3- Create a base class for user controls implementing public properties to access them in user control e.g.
Public Class BaseUserControl
Inherits UserControl
Private _WebPartControl As BaseWebPart
Public Property WebPartControl As BaseWebPart
Get
Return _WebPartControl
End Get
Set(ByVal value As BaseWebPart)
_WebPartControl = value
End Set
End Property
Public ReadOnly Property WebPartID() As String
Get
Return WebPartControl.ID
End Get
End Property
End Class