How can I raise an event from another class which implements an interface that contains an event?
Public Interface IMyEvent
Event MyEvent()
End Interface
[Code].....
Note the comment - that code doesn't work. How can I raise an event like this, if it's contained within another class through an interface?
Currently, when I double click on my current list, even if there isnt an item at the current mouses location, it calls the event and uses the last highlighted item. I know it is possible to fix this by using a selected index change event, but I require the list items to be double clicked
View 5 RepliesI'm trying to make a .dll that contains a lot of basic functionality that a program can use. Currently i am trying to use interfaces to make a lot of this functionallity independend of the program using it but i hit a snag. The Basic idea is that a programmer will create his own object using the interface discribed in my .DLL file. Then implements those functions as he likes. He can then instanciate a controller (found in the same DLL) and sends his custom object implementing the interface to that Controller. The controller can then be started and will take over all the work. I do not know what type of object is send to the controller and idealy i want to program it in such a fashion that i shouldn't care as long as the object send implements that interface.In code I am trying to achieve the following: (quite simplyfied)
.Dll:
Code:
Public Interface MyInterface '<----Decleration of the interfaceFunction GetData() As Integer
Function SetData(Data As Integer)
end interface
[code]....
this propperly. I know that the second i set the interface adaptor in the Controller VS comes nagging that it can not be converted to a "MyInterface" Class. Obviously i am doing something wrong. I can change the datatype that the controller expects to the "MyController" type but that would completely ruin the whole idea of flexibillity. I am hoping someone sees what i am trying to do and can point out where i made the thinking error.
So heres the deal i am still learning VB (bet you guessed that), now what i am tryiing to do is create a form with a number of text boxes (say 25) where a user can enter their own data. Which they can then save as a file and reload. Now when they reload the file the data needs to be put back in the text boxes where it originated
Which would be the most efficient way to write this?, would i write it ti a csv file or a database or text file, as you can tell i'm a little confused on what areas i need to research.
I've got 3 forms that have exactly the same functions, so I decided to create an interface.
public Interface IExample
public sub Add()
Public sub Edit()
[code]....
At this point, objfrmExample is now instantiated, even though I've not done a "objfrmExpample = new [what-goes-here?] " and I'm curious as to why.I could possibly guess that because you cannot instantiate an interface variable, then vb.net automatically creates an instance. But thats just a guess. The question is , what is meant by declaring a variable of type Interface, and how does it work?
In VB6 we had a code inside textBox_MouseUp to call textBox_KeyUp(-1, 0) and the signature of KeyUp was
Private Sub textBox_KeyUp(ByRef KeyCode As Short, ByRef Shift As Short) Handles textBox.KeyUp
Now when I migrate to .NET I changed the KeyUp event to Private Sub textBox_KeyUp(ByVal sender As System.Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles textBox.KeyUp
How can I do this call textBox_KeyUp(-1,0) now from textBox_MouseUp event?
ok so heres the scenario. Ive made an app in visual basic 2010 that calls another application in c:pinger 2.0. In the directory pinger 2.0 are many sub folders from 15-500 named 15-500. I have a button that does this:Shell("c:pinger 2.0" & TextBox1.Text & "pinger.exe")
so basically if i type 15 it launches c:pinger 2.015pinger.exe which works flawlessly however this pinger.exe requires a host file thats .txt based. My problem is when it launches pinger form subfolder 15 it cant locate the hosts.txt. To do a little troubleshooting i loaded the hosts.txt file in the same directory as my VB app and then it worked just fine but this is no good.the whole point of having different subfolders is because each sub has a different hosts.txt file.So what im experiencing is when i call pinger.exe its looking for the hosts.txt file in the root of the VB application and not the subfolder 15-500 is there a way to call a program and let it run from its original location so it will find the hosts.txt file in the correct subfolder?
i can upload my project if this mumbo jumbo has confused you, perhaps theres some ,vb"switch" i can run? like:Shell("c:pinger 2.0" & TextBox1.Text & "pinger.exe",vbrunwhereyoursupposedtoplease)
I have a form which has a button and a toolbar.
The button has code which works and deletes a record in a database:
=======================================
Private Sub Button5_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button5.Click
[code]....
I can put similar code into the toolbar button just changing the Button5_Click to the name of the toolbar button but I thought it would be better if I 'called' the already written code.
I changed the Private Sub Button5_Click etc. to Public Sub Button5_Click then in the Toolbar button click event I put 'call Sub Button5_Click()'
I get errors stating that ' argument not specified for parameter 'e' ' and can't progress.
I will be using this code in a few other forms so would like to 'call' possible.
how can i call a treenode mouse click event from any other key down event?
View 3 RepliesI need to call a function that takes an array of drive letters as one of its arguments. The sample I received from the dev team that created the object uses VBScript and looks like this:
Array("C:","D:")
This doesn't work in VB.NET so I tried the following code. Note: The drives are passed to me in a comma separated string:
Dim drives As String = "C,D"
Dim volumeList As String() = drives.Split(","c)
For i As Integer = 0 To volumeList.Length - 1
volumeList(i) &= ":"
Next
Then I try to pass volumeList to the function in question and I get an invalid argument exception. Is there some other way I could try to create/pass this array so that it acts like the VBScript example?
I have an interface that describes an specialized list in my application...
[Code]....
Is there a way to make an interface serializable, or am I going to have to convert each of my objects into a concrete class implementing the interface, and then return that class?
I am currently working on an existing Windows Forms application (VB.net), and am busy reworking the exception handling mechanism.Currently, a lot of methods in the code are just surrounded with try/catch block that catches a generic exception and then calls a utility method that just shows the user a messagebox informing him of the error, and then logging it.So in a lot of cases no corrective action is taken and the exception is just logged. I know this probably isn't the best way but that's they way we're gonna have to do it for the near future.Anyway, I wanted to do this in a more generic way, so I hooked up Application.ThreadException and AppDomain.UnhandledException.
This seems to work well, except for one inconvenience. Whenever an error gets thrown from the .net runtime itself, or a 3rd party control, the stacktrace begins there where the exception is thrown in the framework-methods or 3rd party methods (obviously!)But it would be handier if I had an easy way of finding out exactly where these exceptions cross the boundary into my code. I would like an easy way of determining (in Application.ThreadException) where in my own code an exception originated. am aware this information is contained in the Exception.StackTrace property, but I would like an easy way to get to this specific information seeing as the stacktrace property is one huge string.
How to control the location where the OpenFileDialog.Show places the interface on the screen?
View 1 Repliesi want to call a button click event in any other event like this form key down event.if e.control andalso e.keycode=keys.S then savebuttonclick event should be called end if
View 5 RepliesHow I can call a line of orders from event to another event,
Public Class Form1
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
[Code].....
I have two forms: main and sub
I need to access the even procedures like textchanged,lostfoucs,changeindex of sub form so that it can be used in main form all controls placed in sub form are included in main form and hold same name and values as of sub form how should i call it from main form to access all procedure of sub form
am trying to call a very lengthy set of code from under the DoubleClick event of one control, from within the Click event of another control....without having to copy and paste the desired VERY length code from the first control into the second.
View 3 Repliesmy form displays locations and owners for a same product, the forms have a data grid view that actually takes in the details of the location and owner of that particular product. a product can have multiple owners and locations once its manufactured over time, the forms actually display this all i need is some kind of business logic that can actually manage the historical events of the location and the owner that when a user actually goes in and adds a new entry, the end date of the previous owner gets reduced to one less than the start date of the new owner. this in formation is stored in business layers called the owner collection and the location collection, i am not able to actually inherit or call the location or the owner collection class in the classes.
View 1 RepliesI have declared this function and trying to get the correct coding to call this function correctly.Public Declare Function ColorRGBToHLS Lib"shlwapi. dll" (ByVal clrRGB As Long, pwHue As Long, pwLuminance As Long, pwSaturation As Long) As Long
View 4 RepliesPerhaps a weird title, but here's what I'm trying to do. I have a few Tabs and each Tab has an RTB. I'm searching for a word and when the final word is found it selects the first tab again << and here is where the code needs to continue. It should call the same event.
[Code]...
If I declare my object at the beggining of my page class, and instantiate it in a dropdownlist selected_index change event. Shouldn't this object be available thru out the entire page and also persist thru a postback? I lose the object in my selected date change event in my calendar.
[Code]...
I know how to handle a single objects property changed event very easily. I want to handle a objects property changed event that is part of another object.
Given Object:
[ObjectY = Y]
+ Public WithEvents X As ObjectX
I would like to do something like:
Private Sub XPropertyChanged() Handles Y.X.PropertyChanged
Right now I need to create a object that equals the object inside that object and then handle this variable pointers property changed, but that is just annoying.
My problem is when i try to call Application.Run() in a application without a form i get "Object reference not set to an instance of an object." when i run it outside VS. but if ran in debug or release mode it works just fine. i may just be forgetting to setup application right, but ive done it before in this same manor and it worked fine.
Sub main() 'this runs first.
AddHandler Application.ApplicationExit, AddressOf ExitEventHandler
dbg_f("handle added")
[CODE]...
Commented out init_timer and init_ready, and now it causes the same error for the myName line. there seems to be something wrong with class Application. btw theres seems to be something wrong with the forum code formatting.
Here is the code for the button click event;
Protected Sub CompetenciesButton_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles CompetenciesButton.Click
Dim con As String = WebConfigurationManager.ConnectionStrings("foo").ToString()
[code].....
Im trying to get the location of a picturebox on my form or say if location = (20,20) then this happens. The action performed by the picturebox is determined by its location i need some way of monitoring it
View 3 RepliesI'm struggling to convert the below code to C#.
Class Class1
Implements IMyInterface
Public Event MyEvent(ByVal sender As Object, ByVal e As MyEventArgs) Implements IMyInterface.MyEvent
[Code]....
I'm sure I can find out what to replace the NotImplementedException parts with but VS is still telling me that the definition is not implemented anyway.
I have a form that allows me to drag and drop pictures but I want it to check if the object is in the correct location
*curpic = the current picture that has been selected
If curpic.location.X > bx1.Location.X And curpic.location.Y > bx1.Location.Y Then
If curpic.location.X < bx1.Location.X + bx1.Width And curpic.location.Y < bx1.Location.Y +
[code].....
I have developed an application where i am drawing line using the mouse like a pen (it can be of any shape) i want to save the location of the object and redraw it later using the drawn location saved on any xml or text file. Instead of saving the edited image i want to save the location only to save the space in the sql server.
View 2 RepliesI would like to know if its possible to bind the property LOCATION of an object like button.[code]So that, every time I move either the hscrollbar1 or vscrollbar1 the button1.location will change or moves the object to the location of hscrollbar1.value and vscrollbar1.value. It should happen without setting its value using the SCROLL EVENT.
View 3 RepliesI am making a program to organize grainbins in seperate yards.In this program, the grainbins need to be moved around and thier position to be saved when the program is closed. I also need to save information such as backcolour and text.I am specifically referring to GroupBoxes, OvalShapes, Textboxes, Labels, and ComboBoxes.
View 2 Replies