I'm working on a base class right now, here's a basic rundown of it:[code]The problem is, in the Public Class bar example, some classes may implement MyInterface, and others don't. What I'd like to be able to do is have the sub New() in the structure in the base class "Foo" be able to tell if the class calling it (either the Base class, or the child class) implements MyInterface or not.
View 8 RepliesI am indifferent if you are a VB.NET or C# or other .NET developer. I have a FACTORY class like the following:
[Code]...
essentially I need to create a class that houses the methods and then call the methods in the form but I can't seem to find out what the right code is to call it. I think there may be an issue with the conversion from a double to a string.
This is what I have for the Class
Public Class Aircraft
Dim Names() As String = {"A-747", "A-737", "C-150", "D-240"}
Dim TakeOffVelocity() As Double = {250, 264, 270, 240}
Dim Acceleration() As Double = {33.5, 44.2, 37.1, 51.9}
[code]...
I have a logging class that stores entries in a datatable dt. I then use SQLBULKCOPY to write that dt out to a sql table. Basic stuff. Problem is, I'd like to only call SQLBULKCOPY when there's say 50 entries in the dt. The problem is, what if I'm done (either intentionally or not, like if the code block that's using the log class throws an exception) with the logging object and there are still 15 rows in the dt?
View 1 RepliesI have two forms Form1 and Form 2. I am passing a function with three values from Form1 and want the load event of form2 to trigger this function.. Basically I want to "paint" the values of qseq, midline and hseq on form2
Public Class Form1
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
[Code].....
When I run this, nothing gets printed on form2 as when load event is triggered thee drawstring method is not called. how can I call drawstring from load method as drawstring takes in arguments and is called from Form1 class.
I have this application which has one class. I need to return a recordset of data to the calling form. If i use Properties to return, it can only return only a single value at a time. Right now i'm returning a datareader object with one of the properties.Can anyone suggest a better way to return multiple rows of data to the calling method via Class Property?
View 1 RepliesI need to pull hardware info and display into some type of a control like a ListView. I've been doing some general research and found that most people have used WMI. I would like to avoid WMI if possible because of possible compatibility problems.However, if that's the best way, then that's the way I'll go.I was wondering if anyone knew of other methods, perhaps an API or other unmanaged code?
View 3 RepliesDoes calling the Dispose method on a Windows.Forms.Timer call it's Stop method? Or should I stop the timer before I dispose it?
View 5 RepliesWhen I am loading an Assembly dynamically, then calling a method from it, I appear to be getting the method from Assembly executing before the code in the method that is calling it.It does not appear to be executing in a Serial manner as I would expect. Can anyone shine some light on why this might be happening. Below is some code to illustrate what I am seeing, the code from the some.dll assembly calls a method named PerformLookup. For testing I put a similar MessageBox type output with "PerformLookup Time: " as the text. What I end up seeing is:
First: "PerformLookup Time: 40:842"
Second: "initIndex Time: 45:873"
Imports System
[code].....
I was looking for some stuff online, and i was looking through my reference sheets for vb.net, but it seems in the code i have found, there is declare in methods. Below is an example i am talking about. The thing is, that i dont recognize it and believe that it is an earlier version of Visual Basic ( 6 or earlier) which used it. Should i just keep looking for different code?
Public Declare Function RegOpenKey Lib "advapi32.dll" Alias "RegOpenKeyA" (ByVal hKey As Long, ByVal _
lpSubKey As String, phkResult As Long) As Long
Goal: Find information on how to implement a method which will check if a certain DSN exists, and then if it does, extract the information and use the information for connection purposes.
Consider a MyForm class that contains a shadowed implementation of Show(). It also contains a CreateForm() method, which accepts an instance of the form and calls the shadowed sub:
[Code]....
Let's say I have a page Test.aspx along with test.aspx.vb.Test.aspx.vb contains a class name "TestClass". In that class I have method1(), method2() and method3()I need to be able to call one of those methods, but I can't hard code it, the method to be executed comes from a string.
I can't do
Select Case StringContainingTheNameOfTheDesiredMethod
Case "Method1"
[code]...
Here's the code.
[Code]...
i've done research and it's because it's using a GET method instead of a POST method... how the heck do you fix this if your using a FtpWebRequest class!?
I'm trying to use PrintToFile from the Power Packs PrintForm Class and I have a question. I'm able to save the form to a file, but now how to print it later if needed. MSDN says that it's saved as an Encapsulated PostScript file. Adobe Illustrator claims it will open EPS file, but it won't open this one. How I can print this file in vb.net? If you've never used this before, here is my sample code to save the form to file in case someone wants to test it out.
If SaveFileDialog1.ShowDialog = Windows.Forms.DialogResult.OK Then
Me.PrintForm1.PrintFileName = SaveFileDialog1.FileName & ".eps"Me.PrintForm1.PrintAction = Printing.PrintAction.PrintToFile
Me.PrintForm1.Print(Me,PowerPacks.Printing.PrintForm.PrintOption.Scrollable)
End If
I am looking for a way to pass a class method into a new thread. On my form I have a few object that contain methods.
For example obj1.doWork.
Now I want to do
Example
Dim t as new Thread
t = new Thread(AddressOf obj1.doWork)
t.start()
However I get an error on this saying:
Error1Overload resolution failed because no accessible 'New' is most specific for these arguments:
'Public Sub New(start As System.Threading.ParameterizedThreadStart)': Not most specific.
'Public Sub New(start As System.Threading.ThreadStart)': Not most specific.
Example:
Two files - TestClass.vb, myForm.vb
TestClass.vb looks as follows:
Imports System.Threading
Public Class TestClass
Private myClassThread As New Thread(AddressOf StartMyClassThread)
[code]....
The result:Application runs, no errors or exceptions.Displayed is the listbox and the Start button.I press the start button and a msgbox says "Not Invoked" as expected and upon clicking OK to that msgbox "Start Button Pressed" is added to the Output listbox control.Immediately following that the msgbox pops up again and says "Not Invoked". I was expecting "Invoked" as a separate thread is trying to use the Output listbox control.Of course this results in the Output.Items.Add being attempted which results in no visible result as the thread is not allowed to directly update the UI control.
I am trying ot call my summary data from my summarytoolstripmenu, to the Public Class Form2 Private Sub FormSummary_Activated(ByVal sender As Object, ByVal e As System.EventArgs)'Display summary information
End Sub Private Sub ButtonOk_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ButtonOk.Click
'Hide the form
Me.Hide()
End Sub
End Class
But for some reason I must be missing something in the text because it still pops up my messagebox instead of the seperate form i intend to call up
I will try to explain what I need.Let's say that I have a class like this:
Public Class Example1 Public Sub ToBeCalled()
[Code]...
Basically i've got a web service that i'm trying to put some kind of usage logging in. To do this i've created a class with a logging method. I instatiate the class on the service and then call the logging method in each of the web methods.
[Code]...
I have a .dll file (Interop.ACTMULTILib.dll) that I use to connect to a PLC. This .dll contains a sub called ReadDeviceBlock2(byval devicename as string, byval size as integer, byref data as short).My console application startup thingy is a module. When I call this method in my main it works fine, if I call it from another method that was called by main it works as well.However, it doesn't work when I call it from my Timer_Elapsed sub? I guess this has to do something with threads but I can't figure it out.
Module Main
Private Timer As New System.Timers.Timer
Private PLC As New ACTMULTILib.ActEasyIF
Private DataSet As new DataSet
[code].....
I have a project that has some VB code in it that I'm not allowed to convert to C#. I work in C# and not very good at VB, but I am needing to modify that VB code to use some C# methods I created.
For example:
C#:
Code:
using MGCIS2.Reporting;
using CrystalDecisions.Shared;
[code]....
At this line in the VB code (Dim crv As New Tax.Reports.CrystalReportViewer(_rdbc)) it is giving me an error:Too many arguments to 'Public Sub New()'
I converted some code from c# for a VB.net project I have an object declared as this :
<Serializable()> _
Public Class oUserApplication
Public ApplicationID As Integer = 0
Public ApplicationRoleID As Integer = 0
[code]....
I am having some problems calling the First() method of the System.Collections.ObjectModel.Collection(Of T) class. My front-end web application is VB.Net 3.5, and the data access layer is C# 3.5. Here is pretty much the sample code I have:
[Code]...
I have a form call form1 which is a mdi tab. Within form1 there is a datagridview and a button. When the button is clicked it will fire a method within form1 to update and repopulate the dgv.
Now my problem now is that I have another form call form2 which I load using .showdialog. Whenever I update the data within form2, it will fire method from form1 and update the dgv in form1. However the dgv doesn't seem to repopulate the updated data.
I have method that exisit in APP_CODE class and I want to call it from Class Library what is the best way to do that?
View 1 RepliesI've got some debugging code that looks like this[code]...
The purpose of this code is to output the name of the calling method. Now, I would like to output the FILENAME where the calling method resides. Is this information available?
I am using a .dll called Kiosk in my application which is resonsible for disabling some keyboard keys. I am doing like this... using Kiosk; public static Kiosk.Kiosk KIOSK = new Kiosk.Kiosk();
[Code]...
I am maintaining some VB .net code and noticed that they call a method with a period in front of it. What does that mean?
View 1 RepliesCalling method in anonymous object?This works:
Call (New MyForm).Show
Lets say I have a application with these three items:
A startup form called form1
A class lets say Class1
A class lets say Class2
How can I access a method in class2 from within class1? For example in Class2 I have a method call AddToDatabase(sql as string) and in a method is Class1 I have a SQL statement that I want to implement.
Solution that didn't work: Initializing an instance of Class2 in form1 called myClass2 and trying to reach it using: form1.myClass2Initializing an instance of Class2 in New subrotine of Class1 and trying to call it through: myClass2