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:
[code].....
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
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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?
View 1 RepliesI 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'm attempting to make a ripple tank such as this in VB 2010. I'm not trying to make it as complicated as that, at the moment I am making each wavefront from an.graphics.DrawEllipse.The problem I am having at the moment is making the ellipse expand properly. I'm using a timer to add one the the ellipse's radius on every tick. Another problem following that is how to make it continuously fire wavefronts so that more than one is on the form at a
View 4 Repliesi am trying to make a webbrowser in VB2010, but one major roadblock that has been in my way for a while, is the fact that i can't get my bookmarks bar to work
i have no code to show you and i am completely open to ideas as long as i use a toolstrip just make sure that the bookmarks work and they are Saved when the program is closed and opened again.
Notes:
instead of "WebBrowser1" use:
"
CType(TabControl1.SelectedTab.AttachedControl.Controls.Item(0), WebBrowser).PutWhateverHere()
"
(i am using a dotnetbar tabcontrol so i need the "AttachedControl")
the toolstrip i am using in this case is called "BookmarksBar" so please don't use "ToolStrip1"
I am making a visual basic game. And in the game I have a few instances where I want to call open a window (let's save to save the user's preferences) from a form, then I want to go from that form to another one.
Example:
The user has completed the new game page. I have the users choices in a host of string, integer, and boolean variables. Now I want to use a generic saving screen I made with a progress bar. When I open up the saving box, I want to close or hide the new game setup menu (whichever I need to do). Then when it is done saving I want the Saving bar to return and cause the new game form to open the actual game form and close itself.
So I guess my question is this: What is a reliable(or correct) way to poll for a return in form to signal it to go ahead with execution?
Second:
This is similar to the first question. Instead of keeping the first form open when I use the saving form; is there a way I can save the name of a page I want the saving bar to go to once it's done?
I want the user to enter their prefered username before they start a new game for the first time. So I poll the saved username setting I have and if it equals "username" I want the Username entry form I made to pop up, but once it's done I want it to immediately call the new game screen. I also want to use this username entry form on the options screen so that the user can change their accepted name at anytime; but I want this screen to return back to the options screen.
What is the accept way to do this? Is it done through stacks? (form information -> stack : load new page : Do stuff: load stack value -> goto)
Finally:
Do I have to keep a window open (not close it) to access the variables that I have defined in it, and have stored values too? Does this apply to hiding too?
I used to program in BASIC, and am trying to learn VB now. What I am trying to do at the moment is take a keystroke on the numeric keypad (1-9 only) and pass it into my program to control what happens to a number as follows:[code]I can't seem to find anything in VB that allows simple keyboard entry in this manner.
View 2 RepliesI'm trying to make some kind of local port forwarder,this means an app which would in my case forward port 10972 to port 25565.This is because of safety precautions. I did a whole lot of work on searching and coding myself, but without succes. Probably it works one way, but not backways. I think the response doesn't work. I really don't know what to do now.
Public Class PFS
Public Sub New(ByVal IP As String, ByVal listenPort As Integer, ByVal sendPort As Integer)
Dim hostIP As IPAddress = IPAddress.Parse(IP)
[code].....
Is it possible to make a program with visual basic 2010 that does not use the actual form but instead only uses other components (e.g. Message Box) to form a complete program?
View 2 RepliesWhat I want to do, is to make VB2010 display a Message Box when both checkboxes are selected. I need this bit of code for a larger project, which about 20-30 people are waiting on me for.
View 2 RepliesIn the below mockup, how do I find out, if I am an instance of FooDAL or WeeDAL from within the method DoMagix()?
Public MustInherit Class DataAccessClass
Public Sub DoMagix()
'** LOOK AT ME!!! **
[code].....
I am creating an application and I am running 1280, 1024 Res and I want my application to be able to support any computer res. How can I do this if it is at all possible?
View 2 RepliesI 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
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Am I correct in believing that any object that doesn't inherit from System.ValueType must therefore by definition be a reference type?
View 4 Repliesi've got a class called prob that inherits system.exception however it seems not to have inherited the constructor
Public Class prob
Inherits System.Exception
public sub stuff
[code]....
throw new exception("test") 'works Throw New prob("test") 'doesn't work is it possible to inherit the constructor into my class prob as well?
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.
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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?
View 1 RepliesWell 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..
View 1 RepliesI 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.
My Markup is:
<DataBrokerDataSource ID="objSrcDBroker" runat="server" />
<div>
<asp:GridView ID="grdVw" DataSourceID="objSrcDBroker" DataMember="Table0" runat="server">
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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.
View 2 RepliesI'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.
View 1 Repliesbasically 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 have 2 business classes, user & salutation and 2 DAL classes of the same name.
The business classes both have properties of the data class E.g.
Public Property Data() As Data.Salutation
Get
Return _Data
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To access some data, you would do Business.Salutation.Data.SalutationID
Both busines classes inherit from BaseClass which contains all my database access methods.
Is there a way that I can access the Data property of the inheriting classes from the BaseClass?
I assume I will need to use reflection as the property types will always be different.
When we can access the public methods via object then why is there need of inheritance.
View 2 RepliesWhat is neater / better in your opinion? Inheriting a Class with useful methods or a creating a module?
For example:
vb Module Tools_Module
Public Sub Print(ByRef text As String)
Console.WriteLine(text)
End Sub
End Module
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VS 2008
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:
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Using the following code btn2 looks different to btn1 and btn3 yet they are using exactly the same image.
Public Class MyToolBar
Inherits ToolBar
Public Sub New()
[Code]....
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.