is it possible to use a dll in my project without having to create an instance of the dll? for example I have a dll that has three basic math functions:
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I'm creating what I believe is an mdi app.I have a login form.I have a class for security.My login form creates an instance of the security class. There are all kinds of security parameters for each user (permissions to different things, etc.)These parameters are part of my security class.Once the user logs in, many other forms will all be opened and closed within the main mdi frame.All of these other forms need the information of the security class to know what the user has permission to do.Do I have to create a new instance of security class for every form in my project? Isn't there a way to store this stuff globally somehow. Retrieve once from the db at the start of the app during login and just get it from this global area everytime?
View 2 RepliesI want to create a class is it where I can do...
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How do I do this? Do i create a class and create a instance of CarData? but how do I add Color and Year etc to it?
I understand if i was to create my own class i would need to declare a variable with the new keyword to create an object to access the encapsulated methods properties etc, unless they were declared shared.
dim myVar as myClass = new myClass
But in this next example is where i have become confused. i have added the mschart control to the form and used the hittest function with the following code.
Dim myVar as hittestresult
myvar = me.chart1.hittest(e.x,e.y)
Why wasn't it necessary to create a new instance of the class 1st. Does the hittest function return an object or a reference pointer to the object. To clarify what's the protocol for when & when not to create a new instance of the class in use.
I have 3 controls sharing the same Bindingsource.Each control will require a different parameter for the query call to the DB to populate the proper controls data.However each control is filled with the same data and using one ctrl has the same effect to the thre controls. The controls all mirror eachother.how can i create a new instance of the table adapter?
View 9 RepliesVB is telling me to use the "NEW" keyword to create an object instance. For example: Private Sub ScoreTotal(ByVal sender..., ByVal e As System.EventArgs) Handles ListBox1.SelectedIndexChanged
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When I run the "MainStudentScores" form and click on a student with three scores separated by the "|", it should give me a Score Total, Score Count, and Average. However it is giving me an error message at "Scores.Add(intPlaceHolder)" This is where VB is telling me to use the "NEW" keyword. Does this make sense?
I am attempting to create a new mobile app using VB in visual studio 2008. I select "File" "New Project". Select "Smart Device" in new project window. Select the "Smart Device Project" from templates. Select ".NET Framework 3.5". Select "OK" and get the dreaded "object reference not set to an instance of an object"
View 1 RepliesI do not want a Windows Media Player control on my form. I am making an alarm clock. I have tried this: Friend WithEvents WindowsMediaPlayer As New Microsoft.Win32. But I do not see a Windows Media Player member. I also asked on the MSDN VB Forum.
View 1 RepliesI'm wanting to create a .chm file for a large project I've just completed.
Is there a easy way to create one of these? one that has Contents, Index, Search and Favourites section.
I know you can create a class library in C#.NET and then use that dll in a vb.net project and everything is just peachy. But can you use C++.NET and VB.NET/C#.NET in that manner?
View 2 RepliesHow can i create msi installer for my designed project in vb 2008
View 8 Repliesi was just introduced to vs 2008 and i would like to create a Visual C++ device project. i would like to create an application which is able to operate in windows CE environment. i do not know which project type i have to choose. so i would like to know more about the types of project under C++.(ATK , CLR,MFC,Smart device, test and win32)
View 2 RepliesIn my application i will use a customized datagridview for all the application, so instead of adding the normal datagridview and changing the properties, i created an user control and changed the inherited to datagridview... This have a problem i can't use the drag and drop...
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There are 3 project in vb.net MAIN PROJECT, BLL(Business Logic Layer), DAL(Data Access Layer) now we are trying to maintain one single instance of some values through out the assembly or what we can called single instance should get used in all projects...for example there is a class called clsParameter we need only one instance of this class should get used through out all projects so if i made any change in MAIN PROJECT same values also get updated in BLL or BLL should receive same values....
View 3 RepliesIn my VB .Net code, I am trying to create to launch MS Project Application. Dim prjApp As Microsoft.Office.Interop.MSProject.Application = New Microsoft.Office.Interop.MSProject.Application
But I am getting the exception as follows:
"Creating an instance of the COM component with CSSID {36D27C48-A1E8-11D3-BA55-00C04F72F325} from the
IClassFactory failed due to the following error: 80010001".Note: This exception happens in 64 bit Windows 7 German OS. But the same code runs successfully in 32 bit Win XP (German and English) and 64 bit Windows 7 English OS.I have even tried the following steps in German 64 bit Win 7
1. Running the application in Administrator mode
2. Setting UAC to low.
3. Re-installing MS Project in German 64 bit Win 7.
Consider the following mock-up image I've created:I am new with working with InfoPath and I was curious if anyone knows how to embed an instance of InfoPath inside of a winform, so users can fill out the form without launching the InfoPath application.
View 2 RepliesI am writing a class project application that is loadable from within AutoCAD. This application generates an Excel workbook with extracted data. I am having a problem with Excel closing when finished. It seems the Excel instance hangs until my application is unloaded. I have found the section of code that seems to be causing to hang, but I'm not sure why its hanging to prevent it.
Below is a copy of my code for the class (top to bottom with exception of the FileExistValidation method... too many characters ). The code section that is commented out seems to be what is causing it to hang. If I uncomment that, Excel hangs, with it commented out, Excel closes out in the background.[code]...
For reasons that are beyond my control, I have three Projects. Projects A and B reference project C. Project A references project B so that it can open a large form in project B. I now need to open that large form from project C, but VB won't allow me to add a reference from C to B because that would create a circular dependency. I found a way around it, though. I created a Timer in A, and when I opened C from A, I passed in that timer. When the user performs a certain action, I enable the Timer from A, and this causes C to open B for me.
View 2 Repliesi was developing Voice Chat Application in visual Basic .NET 2008 i try a lot methods to make installer for it :
1- i add Project Setup Project for my Project for Visual Studio 2008 Deploy & setup Type Projects and make it with output option and detect dependices
2- i try make it with Setup Factory 8.2.1
3- i try with MSI Factory 2.0
4 i try with Setup Factory 6.0
and after making installer copying it to my test virtual Machine or my friend lap and install it i get this error when try to run my application :
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I am using MEF for Plug-in, I made one class PluginManager which has propety<ImportMany()>Public Property Plugins() As Lazy(Of IPlugin, IPluginExport)() Now want to create a new instance of when i query from plugins, I have already set PartCreationpolicy as Nonshared, but still its not working.
View 1 RepliesI am working on an ASP.Net 3.5 solution that I did not originally build. I added a class file named Incident.vb to the App_Code folder like I always do.But in my code behind of a web page, I usually create an instance of a class like:
Dim oIncident as New Incident
But after I type "New", normally I would see my class file he intellisense but I do not. So it does not seem to be able to find Incident.vb. I have not seen this behavior before. Trust me, my class is correct. I have created many class files like this.[code]...
I have created a UserControl Popup window and called that xaml file into another file. Imported the namespace.When I am trying to build this project an error at this below given code:
<Popup x:Name="POP" IsOpen="False" PlacementTarget="{Binding}" Placement="Center" AllowsTransparency="True">
<a:PopUpWindow x:Name="pp" />
</Popup>
Error at
<a:PopUpWindow x:Name="pp" />
Could not create an instance of type 'PopUpWindow'.
Is it possible to create other instances of an existing control and put them into an array?
View 5 RepliesI have a for next loop looping through a dataset.I want to create an instantce of a class for each row.How can I create another instance/variable for each row?
View 5 RepliesDo I have to instantiate description every time for different method? Or should I use static? Here's how I'm doing this now: What is the best way of handling this kind of situations. it seems that I repeat this line:Dim description As BLLDescription = New BLLDescription() without any good reasn.
Protected Sub Button8_Click(sender As Object, e As System.EventArgs) Handles Button8.Click
Dim description As BLLDescription = New BLLDescription()
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I am trying to compile the following code and i am getting the error[code]...
View 2 RepliesI am trying to create an instance of a control to copy it.
Dim NewPanel As New Panel1
Is not working. When you create an instance like this, the "Panel1" wont show up in the list of classes, so it says "Panel1 is not defined".I have heard of control arrays dissappeared in VB2008,but still,is there any way to create a new instance / copy an already existing control or let a control appear like it was when you made it in VB so you can open multiple Panels like they are child forms?
EDIT: I know you can do:
Dim newPanel As New Panel
newPanel = Panel1
Form1.Controls.Add(newPanel)
..but that's not what I want, because that makes you can't edit the controls inside the new panel.
I've searched for an answer and found some c#-examples, but could not get this running in vb.net:
I thought of something like the following[code]...
I know, I can create a new instance with the Activator.Create... methods, but how to create an array of this type or just declare a new variable?
if i create an instance of an object/webpage, is that a complete new object/page based on the original or does it does it just make it accessible? i am almost sure that it creates a new object/page but i would like confirmation. in other words what is the result of this code?
dim Page2 as new Page1
dim Page3 as new Page1
would this create 2 new pages that i can "customize" separately and add different controls to each? heres a brief description of what i want to happen:the user will be viewing Page1 and when he clicks btnCreate i want a page that i created in the designer to be shown and its name and other variables to be determined by what the user chose for room options in Page1. i need "new versions" of this page to be created because multiple users will be creating multiple rooms. i understand that there are more lines of code involved in creating pages and i do have more questions regarding those but i will wait until i confirm that dim Page2 as new Page1 will create a new page. like i said im sure that this does create a new page but i need confirmation. also if it does create a new page, how do i get it to show. i know that response.redirect will redirect me to a dif page but i want show this new room on top of the old one.
i need to programmatic ally create new instance of sql server in vb.net.i develop the database management project. i need new instance at windows authentication.
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