I have 4 WinForm app. Form1 inherits from baseForm, Formv2 inherits from Formv1, v3 from v2, v4 from v3. There are about 2 thousand controls spread across many tabs that contain tabs.
This is really killing Visual Studio 2008, frequently causing it to crash, and just terrible performance in general.
I want to create a FormV5 that inherits only from baseForm but contains all the visual layout of formsv1 through v4 (all of them), (there are no controls on baseForm).
The differences from form to form are mostly adding new controls, with some older controls having to be moved or hidden, and or a few labels changed here and there.
I am working on a wizard form framework that will allow me easily create wizard forms.I have a WizardForm form that has a panel on it. My plan is to dynamically load UserControls into this panel on the form.Each UserControl that is loaded onto the form panel must implement certain properties (allowNavigateNext, AllowNAvigate previous etc.). So I have created an interface to enforce that contract so that any custom user control can be used in the wizard as long as it implements that Interface. So far so good. created my first user control. I implemented the interface. All was good.I went to do the second user control and I realized that this second user control would have the EXACT SAME implementation of the interface as the first User Control. So...I thought...aha...duplicated code...how can I get rid of that.
I want to create a program to simplify my document creation. I'm thinking creating the basic building blocks in Word 2010 would be the easiest and it would also be easy to manage in the future. I would like to create a WinForm and use some check boxes to select which items to be in the document and then have a document created from that.
I would also add some specific text using bookmarks in Word (names, address, etc..). My general thought is create several word documents as the basic building blocks that would then be merged/combined/stitched into one single document (dependent upon what has been selected), that would then be saved as a .docx and/or a pdf.
The general format would be "blurb A - product 1, product 2, ect.. - system specs". I have 14 basic blocks of information with a title, paragraph, and image. Generally each product is about 1-5 paragraphs and takes up a whole page or half a page in Word. I have never worked with a Word document via VB.NET VS2010 Pro and Office 2010.
I have two Forms, which have similar Functionality (i.e. an amount of similar Controls) but complete different Layout. So the normal inheritedForm (which VS2010 provides) wont work here.
I have tried following:
Public Class BaseForm Inherits System.Windows.Forms.Form Friend WithEvents Button1 As System.Windows.Forms.Button
[Code].....
So it looks like, the Designer only tries to guess how the Form looks like by inspecting the top-most Class, without compiling the full inheritance-Tree...
I'm working on an application which has a common window hierarchy with menus and worked ok on vs2003, but now I'm on VS2008 sp1 trying to generate the same hirarchy and I'm amazed that visual support for differents controls like the menustrip are not working. I've been investigating, and so far it seems that the answer to my question is "it's not supported".
I'm developing a VB app, part of which has a 'diary page' metaphor. The page is a panel and I want to put be able to put several different kinds of events on the panel. I've used a User Control for the first type, which works well, and it occurs to me that this and the other events have many properties and methods in common.
So I am wondering if it is possible or desirable to create a 'base' user control with the common properties and methods and have the other events inherit from that? (I am using the word event in the sense of a meeting or workshop rather than a Windows event).
I know one can do Visual Inheritance from a form and I've made a first attempt at applying the same process to my User Control, but when I open the 'inherited' control in the designer, all the properties are disabled and child controls are locked, even though the access modifier is 'Protected'. But I am still feeling my way with inheritance and I'm probably doing something dumb ...
Another approach would be to use MDI, but that feels a bit 'heavyweight' for this app ....
I am trying to create an infrastructure library to be used by all my projects where one of the project in that library contains the base forms for different things like ViewBase, EditBase, SearchBase & DialogBase. They all are inherited from a Base form which contains a toolstrip control with 3 common buttons for OK, Close & About.Now depending on the type of base form I would like to add few more buttons and controls on the toolstrip during the design time. For example the SearchBase would have a Search, Clear buttons and so forth and so on.
Why is it that some components/controls will not be inherited visually in a child form if they are declared with the access modifier Friend vs when they are declared with Protected. For example, I've got a DataSet object in my Parent Form that was initially "Friend" (I drag and dropped it to the form, so it was shown as a control in the designer view), but I noticed that my Child Form did not inherit the control as expected. Once I changed it to "Protected", it showed up in my Child form as expected.I am aware that Protected allows the Child Form to modify the inherited control, but how exactly does this tie in to the issue I described above?
Tablename: traineeinformation if it is text like (it works fine); addothers.Text = dset1.Tables("traineeinformation").Rows(0).Item("others").ToString()
but when i add image like; addpic.Image = dset1.Tables("traineeinformation").Rows(0).Item("picture") I have an error below: Unable to cast object of type 'System.Byte[]' to type 'System.Drawing.Image'.What's wrong with the code?
I am not the original author of this software project and the code is poorly documented. I am mainly a Java/C++ developer.The program displays the tree structure and allows files and folder to be selected. The program is getting errors with FileSystemTreeView when trying to return nodes on a system with a reserved partition.Here is what is happening: tree.SelectedNode = tree.Nodes(0) 'returns error with system reserved partition.calling, GetDriveList() will properly return all the drive letters - and not throw an error. Only when trying to get a tree.Node() or tree.load() is the error occurring.
A Form is to Accept User Name and Password from user, after verification the form should display another form that will accept user's full data. When a user press the Ok button, the information entered on this form should be display in another form (Showing the user what he/she has entered)
i have Design the Firs Form and the second form, how can i pass the information entered on the second form to third, and also what will the code look like I need help on this or Code Sample?
NB: i am trying create an instance of the second form in the third form and declare a variable in the third form that will holed the value, but still not working I want to learn .NET Programming in VC#, ASP.NET And VB.NET. I am student and really get excited when it comes to programming
drag and drop nodes within the same tree (not between trees) when users drag and drop nodes within the tree, give them the option to move the original node to a new location within the tree OR to just copy the original node in a new location (seems complex but I have a month to figure this out). change the system default blue highlight for selected nodes to another color change the system default cursors for invalid and valid drops (instead of the circle with slash indicating invalid target, i want a red minus) and (instead of the little plus sign with little box indicating a valid target, i want just a big green plus sign) add a red insert line to indicate where the node would be dropped within a tree also drag and drop the text of a node from the tree to a textbox add a "folder" image next to parent nodes and a "document" image next to children nodes
I have looked through the internet but I am having difficulty sorting through all the information available (I see a lot of information for Visual Basic 5 and 6, and those codes don't work for me in visual studio 2008). I can email anyone my code I have so far.
Public Class Form1 Private MouseIsDown As Boolean = False Public Sub TreeView_ItemDrag(ByVal sender As Object, ByVal e As ItemDragEventArgs)Handles TreeView1.ItemDrag
we have 3 classes:Class S, class A, class B / A and B inherits S.A has a property A1 and B has a property B1.we also have a collection of objects that has A and B objects.ex.
Dim c as Collection = new Collection c.add(new A) c.add(new B)
Now we want to make a general object that will read from the collection.
ex . Dim obj as S
how can we cast obj in order to see properties A1 or B1 according to the class;
Form1 Public Class Form1 Private Sub But_Bell_Click(sender As System.Object, e As System.EventArgs) Handles But_Bell.Click MessageBox.Show("Ding a ling") End Sub
[code]....
Where has the whistle button gone? The class part of the inheritance has works because you can access it via code.
I'm facing a problem regarding multiple inheritance in VB.net:As far as I know VB.net does not support multiple inheritance in general but you can reach a kind of multiple inheritance by working with interfaces (using "Implements" instead of "Inherits"):
Public Class ClassName Implements BaseInterface1, BaseInterface2 End Class
That works fine for classes but I'd like to have an interface inheriting some base interfaces. Something like that:
What are the situations and their associated benefits of using Generics over Inheritance and vice-versa, and how should they be best combined?I'm going to try to state the motivation for this question as best I can:I have a class as shown below:
[Code]...
Now suppose I have a repository that takes an InformationReturn argument, that has to strore different fields in a DB depending on the type of Info object T is. Is it better to create different repositories each for the type T is; one repository that uses reflection to determine the type; or is there a better way using inheritance capabilities over/with generics?
I have a base class ("MyBaseClass") in a project called "BaseFramework" which is included in several solutions within the company. There are several derived class's in various projects throughout the company that inherit from "MyBaseClass". If I then create a List and add derived class's to it, it will not serialize. I realise that if I were attempting to serialize this list, and the base class and derived class were in the same project, I could simply apply the "XmlInclude" attribute to the base class and include all of the derived class's. This is however not possible across projects, because that would require a circular dependency.
I have the following code; now i set a propertygrid.selectedobject to the Square object, and start changing the Squares properties. If i change the [Position.x] or [position.y] values in the propertygrid the [Position] and [center] properties update correctly, however when i change the [Center] property, neither [Position] or [Position.x] or [Position.y] update. Is there something else i must do to get this to work both ways. Maybe something is lacking in PointFConverter?
Imports System Imports System.Collections Imports System.Drawing
Suppose I want to inherit from System.Data.SqlClient.SqlTransaction which is sealed. Supose I want to just put a wrapper around SqlTransaction and always use MyTransaction instead of SqlTransaction. Is there a way I could potentially cast MyTransaction to SqlTransaction using an Implicit/Widening operator?
I am currently working on a framework for applications developed by my company, my boss wants to have a switchboard and a MenuStrip, where the entries and their actions are controlled by a database.
Now I've dealt with all the code to get them working. But the problem that I am facing is that I have duplicated code because each of the classes have the code that deals with ensuring the user has the right privileges and the code to deal with when a user clicks on an item.
Normally I would move this code out into a class and then have each of the classes inherit from the class, but because the switchboard already inherits from the Form class and the customised MenuStrip inherits from the MenuStrip class.After doing some Googling the only answer I have been able to find it using an interface for the functionality, which is obviously not exactly what I want.
Anyway I was just wondering whether any one had any suggestions on what I could do to deal with this problem, as I would like to avoid having duplicate code as much as possible.
