copy a form without getting Duplicate reference errors that you would have to fix.So This is what i did and i felt i should share it now that i figured it out
File > Export Template > Item Template > Select Form To Copy
Then
Solution Explorer > Right Click on project title > Add Item > Select Exported Template > Rename file > Add Item
I have a VB.NET project in Visual Studio 2008 that I created a specialized addin for. The addin prompts the user to select a database table, takes a template form class's files, copies them to another directory within the project, and renames the form class within the copied files. It then opens the new form and adds controls to it based on the fields in the database table.
The copying of the template form causes the background compiler to give 'duplicate member' errors, such as "Private Sub InitializeComponents(...) has multiple definitions with identical signatures," even though I renamed the files of the new form and the class name within them. Sometimes these errors go away before the new form is opened, but when they stick around the new form doesn't open correctly, and it throws an error instead. I implemented some code to wait until there are zero errors in the error list before trying to open the new form. This has helped sometimes, but for some reason sometimes the errors don't go away at all until the addin is closed.
How to copy the template form and rename the copy without the background compiler ever noticing duplicate members. If that's not possible, then perhaps someone has an alternative?
Here is my code that copies and renames the template form:
Private Sub CreateDataForm(ByVal tableName As String, ByVal displayName As String) ', ByVal subDataForms As IList(Of Object))
Try
Dim dataFormClassName As String = "frm" & MakeValidName(displayName)
Dim dataFormFileName As String = dataFormClassName & cVBSuffix
[CODE].......................
im sure it is something really simple. Im by no means comfortable with VB. The below code is not mine but i have altered it for my needs. However im getting a couple of errors.
Reference to a non-shared member requires an object reference. I have underlined the errors in the code and they all refer to the above description
[Code]...
Can I reference a dll programatically in VB.net? Or change the Local Copy path for a dll reference?
View 1 RepliesI have a program that allows the user to add steps to a process (tabpages in a control). All tabpages are generated on the fly by duplicating a "template" tabpage and consequently have the same control names such as textboxStepDesc. Here is the hierarchy of the controls to get to textboxStepDesc.[code]...
View 1 RepliesI'm converting an existing VB6 command line app to VB.net as need a bug or 2 fixed. It uses 3 x Crystal Reports 9 libraries. The only errors I have now are related to CR9 (dll) code, but don't have CR9 on the VSE machine, & dont have VSE on the CR9 machine. We also have a CR11 version of this. The fellow who created them has left & we dont have VB6, he used his own.I can't seem to copy the 3 x CR9 dll's to the VSE machine to get rid of the errors, says the dll access is denied, source file may be in use.I can't install VSE on the CR9 machine so have to create/build it on the VSE machine & copy exe to the CR9 machine. [code]
View 4 RepliesI have an "Object reference not set to an instance of an object" error that does not make any sense.I have a form with 2 datagrid views, (dgv1) and (dgv2).During the form load, I load the data for dgv1 and dgv2 without any problems. After the form load is complete, I get an error on the follwoing code.
[Code]...
I'm making a project for school with a group of classmates. It is an application that needs to reference quite a few pictures and strings from My.Resources. I don't know what the problem is but, whenever I run the program, I get a message that reads this: "There were several build errors. Would you like to continue and run the last successful build?"
And then below in the Output:
----- Build started: Project: Wilkes-Barre Virtual Scavenger hunt, Configuration: Debug x86 ------
COM Reference 'WMPLib' is the interop assembly for ActiveX control 'AxWMPLib' but was marked to be linked by the compiler with the /link flag. This COM reference will be treated as a reference and will not be linked.
I've got a class, lets call it Person, which needs to keep some data (in the form of another class which we will call PersonData) in one of its properties - the problem is that I will have several instances of this person class and they all need their own 'copy' of the data (just in memory, its not a file or anything).Hhow would I do this? At the moment because everything involved is a Reference type, I'm assuming that if I were to create 2 instances of my Person classes and assign the same instance of the PersonData class to their properties then when one Person class made a change to the PersonData it would be reflected in the other Person class right? How can I avoid that and make it so that they both have their own version of the data, without having to repeat the procedure that fetches the data in the first place?
I'll explain my exact situation just in case it helps, but this is more of a general question as I could probably get around it in this case by copying the byte array I receive from the server (hopefully that will make sense once you read the explanation below) :
In this case the data I am talking about copying is actually received from a server via TcpClient. The thing is, when the client requests the data from the server over the network, the server has to go off and query several other servers etc so I do not want to be requesting data from the server every single time as that would be a big waste of resources and time. So when a request is made and data is received back from the server, several of these Person class instances will be created (in reality, its a few different classes but that doesnt make a difference for this example) and each need to have access to the full data that the server has sent back but in some cases the Person instances might need to modify the data and this is where the problem appears as they will all be working on the same data.
i have a user define object which i'm initializing with data from external datafiles.... the purpose of this object is to reduce the amount of disk/data access and processing required every time i need to add an instance of this object to a collection.so, whenever i add a copy of this object to a collection, i would simply reference the "base" object, and avoid having to process all the data and perform the conversion and so on...the issue is when i add the object
Collection.add(Base_Object, Key)
the collection ITEM is a Reference to the base object and not a copy.
Lets assume that I code a DLL in .Net and I've added some items to the project (For example a picture, or an XML file that contains some kind of configuration for the DLL), and I set the "Copy to output directory" to be "Copy Always".
Now, what I wanted is that if I give my compiled DLL with the bunch of files that were added as items to it, then if someone ads a reference to the DLL in his project then on compile it will copy all files and not just the DLL.
Is it even possible (Some kind of configuration on Visual Studio maybe)?
I have a VB.NET project which references a dll of another program. dll file location is something like "C:Program FilesAppNameAppName.dll" and on my project's references tab the dll's path shows this. When the copy local property is true, everythings works fine. When it is false, I get a runtime error saying dll cannot be found. The other program is a restricted access application and I can not distribute the dll with my project. How can I force my project to look for dll under "C:ProgramFilesAppName"? I didn't have this issue with VB6.0.
View 8 RepliesIs there a way to default the Copy Local property of references that I add to my projects? I figure there has to be some sort of method since adding a reference to a VB componentdefaults to False. (for example, start a project as a class library and then adda reference to System.Windows.Forms, it will default Copy Local False.) Is that somethingin the DLL's settings or configuration that I could replicate in my DLLs to force that
View 14 RepliesI am constructing a collection of objects, and need to use inheritance on a base class - I have been trying for hours in various ways and can't get this to work whatsoever - the error is always "Object reference not set to an instance of an object." The idea in the example below is that an object is instantiated, and within that lies a collection of Students when I try to access the oDemo.Students(0).Name property the error is raised. Otherwise the object appears to have instantiated OK.Here is the code being used to instantiate and access the class (from ASP.NET).
Dim oDemo As New MyDemo.Students
lblTest.Text = oDemo.Student(0).Name
Here is the sample code from the class library:
[code]......
im doing my project and whenever i edit it, i cant see my changes when i debug it, and i always get these frustrating errors:Could not determine the dependencies of the COM reference "PAGEOBJECTMODELLib". Error loading type library/DLL.(Exception from HRESULT: 0x80029C4A (TYPE_E_CANTLOADLIBRARY)) WindowsApplication1
Could not determine the dependencies of the COM reference "CRQUERYENGINE". Error loading type library/DLL.(Exception from HRESULT:0x80029C4A (TYPE_E_CANTLOADLIBRARY)) WindowsApplication1
I build some dlls to be used in a big application, and have a team working in the dlls heart of the application and another team working in the GUI, but I am having a problems in the deployment of the dll's when a change is done, because the GUI team needs or copy the new dll to the project folder, or delete the old reference and add the new one. I am using Visual Studio 2008 and developing in VB and C#
View 1 RepliesIf I instantiate an object within a function in VB.NET and return it, does it return it be reference or by value. IE - should I be worried about performance if I write something like this:
Public Function ret_obj_func() As big_object
Dim ret_obj As New big_obj(<lots of stuff>)
Return ret_obj
End Function
If I call this function from somewhere else, will it instantiate the object in the ret_obj and then create a deep copy to pass back a copy to the caller, Or will it just pass back a reference?
I have built a functionality where I want to back up the database - [Access]. Currently, its working but the user has to specify the file. I used a FileOpenDialog Box to get the file, saved it in a textbox and copied it to another directory. That works good. What I want now is the user doesnt have to know the lcoation of the Database. So, I just want to copy the Database File using the Configuration.Appsettings. He can specify the directory the file needs to be copied to. The Access DB is referenced as follows:
<connectionStrings>
<add name="TestCMS.My.MySettings.CMSConnectionString" connectionString="Provider=Microsoft.Jet.OLEDB.4.0;Data Source=|DataDirectory|CMS.mdb"
providerName="System.Data.OleDb" />
</connectionStrings>
Okay I've been wondering about this for a while now, but whenever you assign variable values to objects they tend to just become references to the original object
For example:
Dim copiedCollection As ListBox.ObjectCollection = ListBox1.Items
For Each L As String In copiedCollection
If L = "Goodbye" Then ListBox1.Items.Remove(L)
Next
As soon as it encounters the string "Goodbye" and removes the item from the listbox, the program will throw an error saying the the collection (copiedCollection) has been modified. How can I make copiedCollection a true copy (not a reference) to the Listbox1.Items collection?
I have a bound DGV that took a bit of work to get its columns set up. I'd like to show a 1-row version of this identical DGV on a second windows form. Is there a way to programatically place a copy on the second form. I would adjust the height and position of the 1-row version, and create a new binding source on the second form so that I could filter the data.
View 1 RepliesI want to make a program just like SitckNote in Win7.
When I click "add" button, another form pops up, just same with the current one. How to do that?
I'm building a code editor app in VB.NET (Framework 4.0) and it opens all ".por" files into individual forms consisting of a MenuBar and TextBox (multi-line).Currently I have 20 forms (all duplicates of the first on I designed) and if there are say 4 ".por" files in a directory, the first four will open up while the others hide.
I think it would be far more efficient by coding a new form For each item in form1's ListView...but I want the next so many to be a copy of the first form I designed since I spent a good bit on it.
I want to create an application which can reset itself quickly and easily (without a function to do so). I thought one way to do this is to duplicate the form in it's original form (variables, etc) from the point it first loaded.This is how I thought it could be done:
1. Click button to restart application.
2. Form in use is duplicated by creating a new form with Dim newForm as new Form.
3. New form contains all properties of the original form at the time it was first created.
4. Original form is removed, and new form is used; thereby 'restarting' the application.
I can't find any simple way to do this without making a function which completely resets every variable and object (there's a fair number of them).
I have one form that needs to act as a template for 4 forms, each with its own set of variables.Do I need to set them up like:
Public frmSlot1, frmSlot2, frmSlot3, frmSlot4 As New frmSlotSetup
Or create an array?
Public frmSlot(3) As frmSlotSetup
This problem should be a no-brainer for anyone that programs daily. I haven't worked in VB.NET in many many months, and all of my reference books are at home. I have to modify a program that I wrote a few years back. I need to add a new form to the project that is very similar to a form already in the project. I figured I would start with the existing form and modify it. I still need the existing form in the project, so I made a copy, renamed it to the new name, then copied it back to the folder in which my project resides. Now, I need to be able to add it to the project, but I'm having trouble figuring out how. So far, I have been able to add just the code without the form. If I try to add the form, it wants to create a new form. .
View 5 RepliesI am trying to create a small form that will duplicate a users entry for them.On my form i have a text box and two CheckListBox controls and a button. The user should be able enter a value into the text box, and select multiple items from both CheckedListBoxes, when they click the submit button the details will be added to a DataGridView below.
This is an example,The user enters the value Audi A4 into the textbox.
The First Checked Lsit Box is called "Colour" and from the options the user checks 'Red' and 'Blue'.
The second Checked List Box is called "Number of Doors" and from the options the user checks '3' and '5'.
When the User clicks the submit button 4 rows will be added to the DataGridView with all the different combinations, as shown below:
Model Colour No# of Doors
Audi A4 Red 3
Audi A4 Red 5
Audi A4 Blue 3
Audi A4 Blue 5
I am currently using this to populate the DataGridView:
[Code]...
I have a small program that contains a webbrowser object, 2 labels, and 3 listboxes. For some reason, whenever I try to hit Debug, it gives me the following error:
System.InvalidOperationException was unhandled
Message=An error occurred creating the form. See Exception.InnerException for details. The error is: Object reference not set to an instance of an object.
Source=Test3
[Code]...
Whenever I setup a database connection, and then drag items from it onto my forms, I get errors! 102 of them to be precise.All I've done is create a data connection, add the datasource, created relationships and then dragged items ome. I've been working with databases for a while and have never had this problem when taking these steps.
View 7 RepliesI just noticed this, but I had a for loop where I incremented beyond the number of elements in an array. Normally this would thrown an exception.
This was in a form load event, and all that happened was the rest of the code in the event never executed. If I wasn't looking for what was supposed to happen next I never would have known there was a problem!
There was no try catch block there... but I would think it would still stop program execution with an error.
Can anyone explain this? Do I have some stupid skip error checked somewhere (if this exists, I'm going to be really annoyed)? In a button click event I put the exact same code and it threw the error... it seems to just be a problem with a form load event.
My IDE is VS2010 professional (vb)
I'm having difficulty with a log in form to a banking program I'm developing. If the user enters an incorrect username or password 3 times I want the program to not allow them log in.
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