I have an .exe project with a form in it that I want to use as a base class for other forms in the project. So I try to add a new inherited form to the project, but it says "Warning: No build assemblies contain components to inherit from. Build the current application, or click Browse and select a previously built assembly from another application". My base class is declared public and my exe has been built. I don't understand. Can you only do form inheritance in a dll?
I've created a class called connector. By clicking on project and adding a class.And I want to inherit from that class in the forms But I get this error.
Base class '<baseclassname1>' specified for class '<partialclassname>' cannot be different from the base class '<baseclassname2>' of one of its other partial types`
what do I do?Here's the class named connect.vb:Imports MySql.Data.MySqlClient
I have created a Windows Form inherited from an existing form using the Inheritance Picker: Project menu ==> Add Inherited Form.So now I have the Form-base (FrmP1) and the inherited form (FrmP2)The form works perfectly. If I open the "code" window of FrmP2 I can see only the main class:
Public Class FrmP2 End Class I have added now a FormClosed event in P2:
I am using an inherited form extensively for the first time, and I'd like to know if what I'm doing is correct.I have a base form with a grid and four buttons (Add, Edit, Remove and Close). There is no functionality in any of the button click events, as the specific implementation of each derived form will be different. The only exception perhaps is that the Close button closes the form. The only reason I am using a base form really is because I've many forms that look the same.How do I now expose the button click events to any derived forms? The only straightforward way I could think of was to have the button click events call an Overridable method, which I then override in the derived form:
Public Class frmTableBase Private Sub btnAdd_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnAdd.Click Me.AddButtonClicked()[code]...
Is that the correct way? It seems a little bit overkill to have to do this, although I can't think of another way really... Perhaps I could add the Overridable keyword to the event handlers themselves (and make them public)..?I'm doing it the way I showed now however. It works, but I'd just like to know if this is the generally accepted way of doing this.
I want to define a generic interface which will be implemented by an abstract Generic Class. Basically this generic class is a collection class of any class. Interfaces are in a separate project saved as FileReconciliation. Here are the interface definitions
Interfaces Imports System.Collections Public Interface ICollectionCommon(Of T As Class) Inherits IEnumerable Function Exists(ByVal oKey As Object) As Boolean [Code] .....
We have an application that has a main form with a map on it. Right now the paradigm is to have forms that are displayed using menu items to display information to the user. Most of these forms are modal forms, but a couple are non-modal forms that interact with the map. For some of the forms, it really would make for a better user experience if we could dock them in the main form of the app and allow the user to see both the form and the map. For instance. We could have a list of map features in a docked window, and select one of the items on the list and have the map zoom to that feature. Or do the reverse: let the users select a map item and have a docked window that shows details of the feature. Sounds great, but I wonder about what sort of gotchas we may encounter. In particular, what if we have two windows docked at the same time? Could we get tangled up in our event code?
I want to implement a priority queue class. When an item is added at a higher priority it is pushed to the front of the queue instead adding to the end of queue. Simple few lines of code
I have a custom control type that inherits from ListBox. It is a list box where you can assign a ContextMenuStrip to each individual item, stored in a Dictionary object. To do this I also had to create a helper class that inherits from ObjectCollection to make sure the owning ListBox gets notified whenever an item is added or removed from the collection, so the corresponding entry in the dictionary can be removed.Now I have a problem that baffles me: Whenever I right click an entry in my EnhancedListBox, I get the following error on the line that has been marked red in the "InvalidArgument=Value of '1' is not valid for 'SelectedIndex'."(Of course, the value can be 0 or 2 as well, depending on which item in the list I click.)
I have checked, and there are 3 objects in the collection, in fact the current value of SelectedIndex was 1. The quotes are also misleading, the value I am trying to assign if of type integer, as is the current value of SelectedIndex.
I have a MustInherit class, let's call it BaseClass, with a bunch of MustOverride ReadOnly properties. The user is supposed to inherit this class and override the properties, returning appropriate values.To help the user decide which property does what, I have included XML comments for each property, so the BaseClass looks like this [code]I now want to enable the user to inherit this class (DerivedClass1) instead, so that he can, for example, override only the Name property, and leave the other properties untouched. This way, he can create a slight modification to one of the default classes, instead of having to rewrite it completely (in reality, there are loads more properties). There are no XML comments, because they are in the BaseClass, and not in the DerivedClass1, which is the class I'm inheriting. In other words: the XML comments are not 'inherited'.Do I really have to copy/paste all the XML comments from the BaseClass and put them in the DerivedClass1 too? Or can I somehow tell the DerivedClass1 to use the XML comments from its base class?
Well the title says it all im using a asp.net 4.0 project.My file structure looks like this [code]Now the WebService seems to get some parts of the web.config from the RootSite, the problem here is <configuration><system.webServer>..So i tryed to place this around that section <location path="." inheritInChildApplications="false"> but that had the result of making a httpHandler only to function in the root directory.So is there any solution to this? i don't understand why my webservice's web.config is inheriting from the root's web.config..
I am trying to create a custom datasource control.
I have been following this article to the letter (I think...).
I have a skeleton / basic implementation of my datasource, however when I declare it in the markup and try to statically bind it to a gridview, I receive the following error:
The DataSourceID of 'grdVw' must be the ID of a control of type IDataSource
This seems extremely strange to me, since my datasource inherits from DataSourceControl, which in turn implements IDataSource. Even if I explicitly implement IDataSource in my custom datasource, it makes no difference.
I have a component class that inherits a user control class and i'm trying to inherit from that same class in a new class.public class B inherits class Unfortunately, I get an error pointing to the .g.vb file saying:Base class 'System.Windows.Controls.UserControl' specified for class '...' cannot be different from the base class '...' of one of its other partial types When I swap the "Inherits System.Windows.Controls.UserControl" with inherits from the base class in .vb files the program compiles but when I try to access any of the components I get an error saying "Object reference not set to an instance of an object."Why is it doing this? it's as if the my sub class isn't inheritingUserControl method at all.
I'm having some trouble trying to inherit a control that uses an embedded resource. The trouble is - this control uses me.GetType() instead of GetType(ControlName). Now when I try to use the derived control, it looks for the resources in the derived control's assembly, instead of the base control assembly, and obviously - doesn't find them.
basically i was wondering if we could inherit shared variables but restrict its scope to only that of the class itself.
Class A Public Shared shared_variable as Boolean = true End Class
[code]....
when i do this A.shared_variable = False, B's shared_variable also becomes false. how do i stop this?i cannot remove the Shared keyword because shared_variable should be able to be accessed without an instance of the class?
I am not sure how much work there is to inheriting from the web client class.
Currently I am using it in my project. And I can't change to anything else. The customer would like to have a timeout after a certain period of time. The web client doesn't have this.
So rather than re-invent the wheel, I am thinking of inheriting from the web client and adding this property.
Most of our code base is in VB.NET. I'm developing a project in C# that uses a lot of the assemblies from the VB.NET code.There are three relevant classes in VB.NET:
I created a base form that has a specific size and an icon as a base for all forms created in my project (to be consistent in looks). The problem is, for some reason if I add a Text box to the Child form, I can no longer execute shortcuts like Copy (CTRL+C) etc into the Textbox.
What should I do to handle this OTHER THAN writing code to capture those on the KeyUp control?
This is also the case for RichTextBox control as well.
In runtime I'm programmatically changing the forecolor to all label and radiobutton controls placed in the groupbox.
The only thing missing is to set the groupbox text/caption forecolor, but as soon as I do so programatically all controls in the groupbox inherits the font type and color making the text hard to read on the Button controls placed within the groupbox.
I need a multiline TextBox which is always disabled, but it shouldn't paint itself in gray, but I want to keep its designer choosen color. I previously had the same requirement with an always-black Label (no multiline) and so I inherited from Label like: Imports System.ComponentModel Public Class LabelDisabled Inherits Label Sub New() InitializeComponent() Enabled = False End Sub [Code] ..... But this way, neither I can set the "real" Enabled property, I mean the backing field.
When inheriting class or control e.g. ListView, TreeView, etc..., what is the best way to distinguish between built-in methods/property/events and mine?
Currently, i start my methods/property/events with "aa" in order to make them at the top of auto complete list.
