Loading And Using A DLL At Runtime?
Sep 28, 2009
I'm trying to make my program have plugins that don't require real installation. My plan is to have the plugin consist of two files:a dll file, and a xml file describing the dll so the program knows what to do with the dll. However, I have NO idea where to start.I've referenced dlls and used them in my program before, but that was BEFORE compileing the program. Could someone please point me in the right direction? I am using Visual Basic in Visual Studio 2008 Professional.
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Jun 2, 2009
I am using a DLL in my application that will probably be experiencing frequent updates. I want the DLL to detect the new version (I know how to do this), load the new version of the DLL into memory, and continue running. Is this even possible? So I need to know how to: Unload the current DLL. Load the new DLL. If possible, do this from the DLL in question. Is this even possible? If not, how close can I get to this?
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Mar 4, 2011
i can load a winsock control at runtime... but i can't figure out how to get its events to pop up.
AddHandler S.Connect, AddressOf SocketConnectEvent
this gives me an error....
Public Class Form1
Dim S As MSWinsockLib.Winsock
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
[Code]....
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Jul 20, 2009
I'm trying to browse to this page using the web brower in vb and whenever I do so it gives me a runtime error:If I click No(Nee) it loads the page fine it basically says:[code]So this is what gives the error, now is there any way so I can disable the run time error from coming up at all? [[code]
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Mar 28, 2011
I've got a code sample below that will compile, but not run. Start it in the debugger by clicking the "step into" button on the toolbar, and an exception pops up before it reaches the first line of user code:
"Could not load type 'TestPrivileges.Win32Module+TOKEN_PRIVILEGES' from assembly 'TestPrivileges, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null'."
Comment out either the 'Dim ... TOKEN_PRIVILEGES' line in the module or the 'Public Shared ... TOKEN_PRIVILEGES' at the end of the class, and the problem will stop occurring.Visual Studio 2008 as well as 2010 does it.
Module Module1
Sub Main()
Dim newState As Win32Module.TOKEN_PRIVILEGES = New Win32Module.TOKEN_PRIVILEGES
MsgBox("Here I am")
[code]....
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Feb 8, 2010
i'm doing a simple form tat could add picturebox during runtime and i could add several picture into it.
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Jul 13, 2009
I have a window application develpoed in vs 2008, framework 3.5, in which i have put a button.. Now where i click that button the other text boxes are filled up with the data from database thru web service.. what i want is while all text boxes are being filled i want to show an animated loading gif image till data loading is completed in all the text boxes.. i have tried to use image picture box but while data is loading gif image is displyes but in static mode.. cant see animation... i think this is because data loading and animation both are done thru one UI thread..
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Dec 20, 2010
I have created multiple dropdown list at runtime and populated with data. I also have added an eventhandler to determine the selected value of the drop down list.
The code is as follows :
Dim tbl As New Table()
tbl.EnableViewState = "true"
[code].....
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Aug 6, 2007
I have a Visual Basic 2005 program which runs fine if I execute the built Executable. However if I start the application in VS2005 debugger it gives a weird error
[Code]...
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Jun 2, 2011
an application i developed using vb 2008 express, to fill a web form with data from an access database, one after another when a button is clicked hasn't given me what i expected. the loop was suposed to stop after filling web form with the first data on clicking a button and continue to fill the webform with the next(2nd) data from the database on clicking the button again. Below is the code i wrote
Private
Sub STARTButton_Click(ByVal
sender As System.Object,
ByVal e
[Code]....
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Jul 29, 2010
Soemone recently downloaded my software and they got this error: microsoft common languages runtime version 4.0.30319.0 how do i fix this
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May 24, 2012
I'm creating an app to manage the movies I've watched and get some info about these movies and then display these info in labels.At moment I'm trying to load the "runtime" and "genre" into label3 (runtime) and label5 (genre). Once the movie name is clicked in the listbox control, these info are loaded from a website (webbrowser control) and then displayed in the labels. My question is: Is there any way to make the My.Settings save these info for EACH movie? Something like this:
Saving the info:
vb
If ListBox1.SelectedItem.ToString > 0 Then 'LOADING THE INFO CODE... 'SAVING... 'create: My.Settings.(ListBox1.SelectedItem.ToString & "1") = Label3.text 'create: My.Settings.(ListBox1.SelectedItem.ToString & "2") = Label5.textEnd If
[code]....
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Feb 25, 2009
I'm trying to use a loading overlay on top of a Windows form that adds a 50% opaque layer on top of a windows form with a loading GIF, while it does what it needs to do in a background thread. The overlay is a windows form that I'm drawing in the onPaint event.
The loading overlay works fine on multiple different form loads, but fails to work properly when summoned to ensure patience during a 30 second upload process (That Prints a Word Document to PDF, then uploads that PDF to a SQL Server). This upload collects some data from the form, puts it into an Object, then operates entirely on a background thread. The loading overlay will appear, show the first frame loading GIF, then just freeze. The onPaint is getting fired and the image frame is being updated, but it isn't visible
Constructor sets the form to be UserPainted:
Sub New()
InitializeComponent()
SetStyle(ControlStyles.UserPaint Or ControlStyles.Opaque, True)
End Sub
[Code].....
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Nov 20, 2009
i've read this somewhere before and was able to make it work, unfortunatelyi lost my sample codes and couldn't recall some parts, anyway, here's what i'm trying to doi have a couple of DLL with same methods and properties, instead of referencing them directlyto my main program i have a common interface which i have reference to in both main program and DLLs (implements), the main program is suppose to load whichever DLL it requires (so i was thinking of making it more like plug able), here's what i have so farINTERFACE CLASS
Code:
Imports System.Reflection
Public Interface MyInterface
[code]......
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Aug 2, 2011
I've spent hours trying to get this simple test case working, and searching the internet for clues.
I have a VS 10 solution containing my VB.net project, and a VC++ DLL project.
In my DLL project i have:
json_main.cpp:
#include <Windows.h>
extern "C"
[Code]....
I tried using dumpbin.exe on my DLL, but I don't get any function names out of it to determine the mangling scheme it is using
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May 22, 2011
Trying to exit an application but can't seem to kill it without an error."An error occurred creating the form. See Exception.InnerException for details. The error is: The form referred to itself during construction from a default instance, which led to infinite recursion. Within the Form's constructor refer to the form using 'Me.'"The form hasn't loaded yet, it is still in the process of looking for a file to load, if the user doesn't want to specify a working directory, that is their choice, but I need to close the app since it can't continue without it.I'm stuck in a class and can't get back to the main form without it continuing to load everything up. I wan't to force a shut down. [code] I was trying to get back to the main form without loading any more from the class to kill it there. [code]
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Apr 22, 2012
I have been working on a solution that uses Combo Boxes to fill DGV I have 3 RDM tables, 3 Combo boxes and 1 DGV Probably best way to explain tables is this way
Table 1 OwnerID 1, 2, 3, 4, 5 ( There are 5 owners)
Table 2 CDID 1=(1,2) 2=(3,4) 3=(5,6) 4=(7,8) 5=(9,10) (each Owner has 2 records)
Table 3 CDTrackID 1,1=(1-10) 1,2=(11-14) 2,3=(15-20) 2,4=(21-27) 3,5=(28-36) 3,6=(37-40) 4,7=(41-44) 4,8=(45-47) 5,9=(48-55) 5,10=(56-60)
where 1,1=(1-10) means
Owner 1 record 1 has 10 records and
Where 1,2=(11-14) means
Owner 1 record 2 has 4 records
etc etc
On Form Load Combobox 1 loads all the data from table 1 with no output in DGV (Works well) (5 records Perfect)
When I select a record from Combobox 1 it loads relation data from table 2 into Combobox 2 and also displays same in DGV (Works well) eg if I select record 3 in combobox 1 it loads records 5 and 6 into combobox 2 and DGV (2 Records. Perfect)Now comes the Problem When I select a record from Combobox 2 it is supposed to load the relation data from table 3 into ComboBox 3 and display same in DGV eg Combobox 2 has records 5 and 6. If I select record 5 It should load 3,5(28 - 36) OR If I select record 6 It should load 3,6(37 - 40) instead If I select Record 5 then Record 1,1(1-10) loads into combobox 3 and DGV If I select Record 6 then Record 1,2(11-14) loads into combobox 3 and DGV Regardless of which record I select from Combobox 2 (1,2); (3,4); (5,6): (7,8); (9,10) it always loads the same records into combox 3 and DGV Sample code for combobox 1
SQL = "Select * From CD Where OwnerID-1 = '" & cbxOwner.SelectedIndex & "'"
Sample Code for Combobox 2
SQL = "Select TrackName From CDTracks Where CDID-1 = '" & cbxCD.SelectedIndex & "'"
[code]....
The only thing I can think of is that my query constantly sees 2 records and numbers them as 1 and 2 thereby displaying records 1,1(1-10) OR 1,2(11-14)?
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Apr 7, 2009
I have a CSV file which I append using the LoadActivityLog sub and then I pass this CSV to a datatable and populate a DataGridView in my form using the WriteAcitivityLog sub. Everythign works fine. However the datatable passes the information into the datagridview in such a way that it populates the column header rows with data as well. I want to put custom column header fields into the datagridview. However i cannot figure out how to do this.
[Code]...
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Jul 31, 2009
when i try to load i get this error:
An unhandled exception of type 'System.NullReferenceException' occurred in Jeopardy.exe
Additional information: Object reference not set to an instance of an object.
on this line:
VB.NET
question(0, 0) = node.Attributes("Question1").Value
note that i did declare:
VB.NET
Dim question(,), answer(,) As String
Here is my code to save:
VB.NET
Dim filepath As String
Dim results As DialogResult
results = SaveFileDialog1.ShowDialog
[Code]...
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Jan 20, 2010
how to Load graphics in a Box?
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Jun 6, 2009
i just recently moved to the windows-7 operating system from xp. (didn't like vista much)
in xp, i can load as many applications of the same app, multiple times.. windows -7 does not allow my app to do so..
if it has something with checking "Make Single Instance Application" from the app's properties, definitely explain what that does, since i don't have a clue.
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May 6, 2012
[code]...
I'm sifting through the dump of AniDB titles and everything works except that it only sees 7161 elements instead of 9200. Anyone have any idea why? It's not calling an exception on the load method as if something is wrong. Even when I change it to just take the root element and then get the count of children, it gives 7161. Like it doesn't even see the last 2000.
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Feb 13, 2012
I have an idea and can code, if someone can get me moving in the right direction. What I have in mind is running a program when it is loaded. No Start buttons or clicking. Just running when it loads. I have looked on the Internet and in books I have purchased, but am unable to ascertain the command or code to run a program when it loads.
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Mar 2, 2010
I use this to load html page by xml
Dim xmlDoc As New XmlDocument()
xmlDoc.Load(Server.MapPath("index.htm"))
Or
Dim xmldoc As XDocument
xmldoc = XDocument.Load(Server.MapPath("index.htm"))
but i got some errors like :
Expecting an internal subset or the end of the DOCTYPE declaration. Line 2, position 14.'>' is an unexpected token. The expected token is '"' or '''. Line 1, position 62.Expecting an internal subset or the end of the DOCTYPE declaration. Line 5, position 20.
all these errors came to me when i solve one another one show up.
i'm asking do i use the perfect way to load this file or is there another way for that?
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Apr 26, 2012
How do i load the Main form of a WPF so that a seperate thread goes and gets data from the database while the form is in an apartmentstate ? (drag-able / movable) I Know this is possible with opening a new window from your main form like this :
Private Sub openOrderWindow()
Dim OrderWindow As Orders = New Orders
OrderWindow.ShowDialog()
End Sub
[code]....
I've tried putting MyBase.ShowDialog() and .Show() and .9000+ other things The only benefit I've got out of using a seperate thread to load from the databse is i can see the screen right away (as oppose to it being a transparent box until it loads) but i cannot move it around or minimize itis there any way to make it Movable while it loads?
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Feb 9, 2010
When I run my .net application exe .It takes time while loading first time How can I reduce a loading time of my application exe ?
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Dec 3, 2002
Does anyone know of anyway that it would be possible to speed up the process of loading forms.With VB6, forms (simple ones) was extremely fast but with VB.net, the initial loading of a form (even the simplest one) takes very long. Although it gets better once it's loaded once and the reloaded the next time (almost instanttaneous), but the first time loading gives a bad impression to any user that .net is actually much slower.
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Sep 1, 2010
I have a project that I am doing which is as follows and need your help to complete the last section I can start word no problem with process.start("winword.exe")the problem is the attachment I attached the documents using project resources and then add exisiting text files and attach it to the project but when I debug I get the following error the code used is as follows
Process.Start(My.Resources.Results
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May 25, 2009
I am writing a program and I want the program to support plugins. I created an interface that the program must implement. I am using the following code from my main program to call the plugin:
Dim asm As Assembly = Assembly.LoadFrom(ff.FullName)
' Get the type
Dim myType As System.Type = asm.GetType(asm.GetName.Name + "." + asm.GetName.Name)
' If the type is null then we try again without the root namespace name
[code]....
I set this property from my main program and everything works. Except, after a while, m_PanelObject gets set to Nothing for some odd reason. I'm not setting it to Nothing anywhere in my program and there is no place in the plugin code that sets it to Nothing.
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May 24, 2010
We've built a small component which takes an Id, looks up an entry in the database for an assembly/namespace/class, and dynamically loads an instance of the class that we're after. It has been working fine up until now, but when running this code in VS 2010, it's failing.
Private Function AssemblyLoaded(ByVal assemblyFile As String) As Assembly
Dim assemblies() As Assembly = AppDomain.CurrentDomain.GetAssemblies
For Each asmb As Assembly In assemblies
[Code]....
But it feels dirty. Is there a better way of checking if an assembly is already loaded, and handing that back to the caller? Are the issues above specific to .NET 4.0 or Visual Studio 2010? I haven't tried this outside the IDE as it requires fairly significant configuration.
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