Create An Object Dynamically With CreateObject Function?
Oct 8, 2011
I am trying to create an object dynamically with CreateObject function. The code is below but it gives error:"ActiveX object can't be created" while calling the CreateObject function.
Public Class Form1
Public Delegate Sub DButtonClick(ByVal sender As System.Object, ByVal e As System.EventArgs)
Private Sub DButton1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs)
MsgBox("You hit me")
I have a class library that contains a number of classes. I would like to dynamically create an instance of one of these classes, set its properties, and call a method.
Example:
Public Interface IExample Sub DoSomething() End Interface Public Class ExampleClass
I have a dll ( vb6 ) containing a public class with a public Type ( named Test ) and finally a public function that wants a variable passed by ref of Test type. Obiouvsly, if I reference that dll in a new project ( vb6 ) I can see the public function and the Test type I must use...the problem comes when I must call that dll creating it at runtime without any reference, using in example CreateObject. Can I reference in some way the type Test inside the dll by having created it at runtime? If I declare a type IDENTICAL to the Test type in a public class in my new project, VB issues a TypeMismatch error even if both data type are the designed the same say, have the same name and so on! how it comes?
I am having problems calling a Com object that I created under Visual Studio 2005 with Standard ASP I registered it using regasm.exe.Below is my code (VB) . have tried creating the object two ways.What am I doing wrong ?
Server.CreateObject("TestCom2.TestFunction") and Server object error 'ASP 0177 : 800401f3' Server.CreateObject Failed
I need to create a page that will display gridview based on user wants (programmatic ally).Basically I have a list of columns then the user will choose for the list. I need also to have sorting function
I am troubleshooting a program that normally works, and has worked in the past on the machine I am working with.I am a very novice programmer, I didn't program this myself I am just trying to get it to work.I have done as much research as I can, which has lead me to believe it is permissions problem with the CreateObject command.I have tried a fix in the .net 2.0 machine.config file, changing the processModel user to System, that didn't help.The machine does have norton on it, and norton was installed since the program stopped working. However I have tried disabling norton and running the program. A friend suggested it might be some settings on the computer that Norton changed hence disabling it not helping.Here is the error:See the end of this message for details on invoking just-in-time (JIT) debugging instead of this dialog box.[code]... When JIT debugging is enabled, any unhandled exception will be sent to the JIT debugger registered on the computer rather than be handled by this dialog box.
I am getting this error saying "the call to the server.CreateObject falied while cheking permissions. Access is denied to this object".I get this error every time I create a new DLL after compiling my VB6 code and drop it in the component services.i am using these DLL's for the web application i am working on. Is this a DLL registration issue, or is this because the DLL is not being generated correctly. What are your thoughts on this? i have attached the error message for reference
I am working on a application that has quite a few functions involved and have been thinking of the following: If I have a function that has a few paramaters, is it more efficient to pass the objects to the function(Example 1) or reference the objects in the parent(Example 2)? Does it matter if the objects are large or not?
Example:
Class mainform Public myGenericList As New List(Of String) Public myDatarowArray() As DataRow
I call the function GetDataTable and when it gets to the return line, I get the error message: Object reference not set to an instance of an object.
Dim DB As New DBConn Dim gd As New DataAccess.GetData Dim DT As New DataTable
[Code].....
Updated. I'll see if I can update with the DataAccess.GetData code. I didn't originally put it in there because our shop use it all the time and have no issues with it.
dim object1 as new clsDatadim object2 as object object2 = getobject("object1") "getobject" function is my "needed function"
the purpose is to set object2 to have same memory address with object1 so if i change the properties of object2 then the properties of object1 also changes..
Suppose I have a class that represents a product to be priced using one of a number of different pricing strategies. This pricing occurs hundreds of times per second, so to eliminate repetitive if/else statements I am instead using a delegate to launch the appropriate strategy, like so:
Private Delegate Sub PricingModel(ByVal params As PricingParameters) Private myPricingModel As PricingModel Private myPricingParameters As PricingParameters[code].....
But this doesn't look right to me (though it seems to work). Is there an accepted/better way of doing this? Or is this the standard way? Or is this just simply a doomed approach from the start?
Dim oMyObject As New MyObject oMyObject.DoSomething("Parameter1","Parameter2")
The "DoSomething" and the two parameters are dynamically provided from another script. They are stored in a string object in this script: sAction & sParameters. My question is how can I dynamically pass the "sAction" to the object oMyObject.For example oMyObject.sAction (where sAction should be the value stored in the sAction string). The example will probably not work. Is there a way to do this? The idea behind is to avoid having to write each function hardcoded, like:
If sAction = "DoSomething" then oMyObject.DoSomething(sParameters) ElseIf sAction = "AnotherThing" then
I've created a dialog which I'd like to popup from any function or sub in any class or form that I have in a project. It would nice to have it work exactly like a messagebox except it's got a progressbar and a cancel button on it. It's job is to display the progress of other functions so it should just stay open until I close it or the user selects cancel.Now I've found many of the basic examples on the net and have got the dialog working exactly as they have shown it. The trouble is that the examples are using a counter or thread.sleep which simply adds +1 in the DoWork sub. In other words, it validates that a worker thread can update a progressbar but it's a closed loop that only exists in the dialog's class.The examples don't show how to call an unkown function in another class dynamically, they're simply a hard coded 1+1 in DoWork. To me it's not a real world example because it doesn't show how to plug into the dialog or get a communication stream from other classes and functions that are running and wanting to increment the progressbar.[code]
I'm trying to reference a public property from a string. How can this be done in vb.net?I have the text value of "FirstName" stored in strucParam(i).TxtPropertyName.[code]...
I am coding a public sub routine that clears all textbox fields in a form. I want to call/reuse this sub routine everytime i want to clear all textfields in any form in my program.
I can create a collections of all textbox objects in a form and loop on each of them to clear their textfields.
I'm making a little program in where i'm trying to invoke a method from a class dynamically with so called Reflection.
The class I'm trying to call is called ContactList and i try to invoke the property in this class called count. The assembly itself is called Contact.Exe
Now I have the following code where I make an instance of the ContactList class in the Contact.exe assembly:
Below is some code that I'm using to create objects with Visual Basic:
For indexCounter As Integer = 1 To TotalParticipants Step 1 participantClock = New Label participantClock.Size = New Size(100, 20) participantClock.Name = "participantClock" & indexCounter
[code]....
I'm creating a label, a button, Timer, and Stopwatch. (Though I have sinking feeling I don't need BOTH a timer and stopwatch since I'm counting time.)What I would like to do, is create the label and set that label's text to be the value from the stopwatch. The button that will be created will stop THAT stopwatch.
The problem that I'm having is that I cannot call the stopwatch by name since it wasn't created yet and VB throws a hissy fit at me for it. (After all it wasn't really declared.)So the question becomes, how do you call the most recently dynamically created control and assign events using that control. If it's not possible to do, I do not mind dumping the form and starting over creating 30 stopwatches instead (but I'd like to avoid that, if possible).
I have an object that is defined as a global variable based on custom class. Within that class I have an event that gets fired a certain intervals. These events are fired on the same thread as where the object is declared. How do I create a global object, but have the events within that object fire on a separate thread?
I am trying to write an VBA application in Excel 2010 using "Microsoft Soap Toolkit 3.0" on 64 bit Windows 7 to consume an web service. But i got an error while initializing an object of SoapClient30.
I was create Access database with Access 2003. I create VB project with Visual Studio 2005 Standard With connection wizzard I create coonect with this Access database, select all tablesI see this database inside Data sources and inside Server explorer Test connection is OK When I drag and drop table from Data sources, Wizzard don't create DataGridView, DataSourceBinding etc .. and I see popup window with mesage: Object reference not set to an instance of an object and then "game over"
Under component services, a COM+ component is used by the company, right-clicking it and choosing 'Activation' tab will show the 'constructor string' that is used for DB server connection by all applications. How can I access it the simplest way possible?
How do I dynamically call a function with delegates by passing a string to a background thread in VB.NET?
Currently my code is this
Public Sub invertImageBK(ByVal image As Bitmap) Dim snxl As System.ComponentModel.BackgroundWorker = createBW() snxl.RunWorkerAsync(New ImageProperties(image.Clone, "invertImage", Nothing))
I would like to create a folder dynamically in vb.net.I know System.IO.Directory.CreateDirectory("c:NewFolder") would create folder in the directory but I want folder to be created in the application and visible on my web page.its like when I say create album ..I should be able to create a folder with album name on it.
I want to create a form dynamically.I have a section on the form that has 3 combobox and 2 buttons. What I want is when the user clicks on the '+' button it add another 3 combobox and 2 buttons below the first, and so on and so on. Also when the user clicks the '-' button I want to remove the row of 3 combobox etc.