I have a class that seems to be recursively adding an EventHandler to an event. I have looked at the code but there is no AddHandler on it and there's only one method with the Handles clause.In the memory profiler it shows that the event handler is calling the event handler that is calling the event handler and so on for a rather large number of steps.
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I have a problem with binding my EventHandlers at the right time. Here's a pseudo code of my 1. version:
[Code]....
I thought this 2. version would use "static binding" of the events during compile time. But it seems, that they are also bound to late, namely after the initialization of my UserControl has finished and so they aren't captured again. So is there a possibility to bind the events "at the beginning" so that my events, which are raised during the init of my UserControlClass are handled in my MainClass?
In VB.net, how can you programmatically launch a .exe file? Is there a way to check if the file is there?
I know there is some way to check using System.IO, but I have no idea. However, I have not even the slightest clue as to how to launch that .exe if it is there,
In my programme, Student have to select 1 major subject out of 5 subjects and 1 subject for major2 subject our of 4 subjects. And student will have to select 1st major subject according to the preference and will have to select each 4 subjects for major 2 subject against each major 1 subject.as an example if student slect csc for major1 he can select 1st preferce stat , 2nd pref.. maths, 3rd pre.. managment. 4 th pre... eltn for 2nd mejor subject.so, if anyone select one subject for major 1 , I want to remove it from major 2 and display the rest of subject.
cmbBox2.Items.Add("CMIS")
cmbBox2.Items.Add("ELTN")
cmbBox2.Items.Add("IMGT")
[code]......
I would like to know how I can get a server ip.I have a textbox (textbox1), a label where the ip will be displayed, and a button that will get that information.this code is not related to this but it performs a simmilar action but instead in displays the ping of a given server:
Dim reply As System.Net.NetworkInformation.PingReply
Dim p As New System.Net.NetworkInformation.Ping
Try
[code]....
i want to use the same textbox to get ping and ip of a given website triggered by the same button.
I'm populating a listview with a list of databases on a selected SQL instance, then retrieving a value from each database (It's internal product version, column doesn't always exist) I'm calling the below function to populate the second column of the listview:
[Code]...
I'm trying to manage an FTP server with code that requires authentication.So I need to log in, get a list of directories and files within a sub-directory, Create directory, Delete directory and Delete File. (I know how to download and upload) I can't find any documentation on how to do this...though I would think it a fairly simple question to answer I seek not answers, but understanding, that I may not solve, but learn. What good is a fish without the skill to catch it?
View 1 RepliesI have a form, 24 buttons on it...Thet name is button1, button2.... I created this.How can i change tabindex at run time?And how can i use this:?for i=0 to 23button(i).text=""
View 9 RepliesWhats the best way to organize code responsible for Form's content.In my case, there is a DataGridView and list, next to it, with a few options available (projects, managers, employees, etc...). Choosing any list's element fills DataGrid with proper data from database.Now, GridFill functions + handling of all add/delete/edit buttons of each list element gives quite a code in the Form's source, which bothers me a bit. How to split it then to avoid problems in the future? While googling, I've seen some advices to use partial classes, modules or just classes. Moving all functions relating the Projects, Managers, ... , to own separate class sounds like a nice idea but then comes the question how to pass all necessary data to the class functions.
View 1 RepliesI Want manage the keys state in my program(in vb 2010) but 'key press event' cant manage more than a key in a time.i want manage keys for commanding something.(for example if "CTRL AND AIT AND Shift And "A" and "S" was pressed do something)
View 2 RepliesI am a beginner programmer, and taking my first course in VB.NET in college. I am writing a program that teaches the user step by step to solve a rubiks cube. One problem I am having is how to manage the 20 forms that make up my program. Currently, when the user procedes to the next step, I make the current form invisible, and show the next form.
ex. Nextbutton click
form2.show()
me.visible = false
[code].....
have been writing code to replace an old Fortran program. The Fortran program had very organized subroutines which could be called from anywhere in the project. Most of these were relatively small and left a small, easily followed main routine. I'm converting over to VB.net and when I write the subroutines they are all on the same form. Wading through 50-100 subroutines on one form is going to be messy.
View 3 RepliesAfter casually creating a program to manage media (music, films, photos etc.) I came across a lack of functions that could be solved be being able to identify the length/ genre/ album/ artist of the song in question. find these file attributes (using a database is out of the question due to lack of resources).I'm reading the song into a string array from the folder they are contained in with the code:
My.Computer.FileSystem.Getfiles(FolderPath).copyto(MusicArray,0)
When I try to use the add/remove metho9ds for an x509 store on the root authority (code below) I get confirmation dialogs.Is there any way to avoid those dialogs??
View 1 RepliesIt's me again, trying to have multiple projects in the same solution. How can I do that?
I know that the project name should accompany whatever functions I'll be calling but somewhere it does not work.
One more thing, can I include forms in all the projects I create?
An application I am developing creates a directory and text file within the directory. A button is then coded to add a text string to text file. An error is issued stating the file cannot be written to as the is open to another process. This suggests the file needs to be closed before it can be written to.
View 2 RepliesManaging WindowsMediaPlayer in a Form
View 3 Replieswhat would be the best way to manage a connection to a database in asp.net.My application is built using an N-Tier architecture.The DAL consists of static classes with methods such as
Public Shared Sub Delete( _
ByVal connection As MyConnectionClass, _
ByVal contact_id As Integer, _
ByVal contact_timestamp As Date _
[code]....
The point to note here, is that I pass the connection to the DAL from the BLL.Should I create the connections in the MasterPage, store it in an object, then pass it to my business objects as I create them (the thing I'm trying to avoid)Should I create a connection using a static class and calling a method like CreateConnection on it, from the constructor of my business objects (Something I'd like, but I don't want to have a connection per object, I'd like it to be shared for all instances of my objects, but since asp.net is multi-threaded, a static class doesn't make sense to store connections) the solution should also work well in a Windows Forms environment (So no connection storing in session, and retrieving it with a static method in a class, for the current context)?
I have seen a few .NET apps use .db files. I am not new to Visual Basic, however I have never created a VB app that uses databases. I do know PHP pretty well, and working with databases in PHP I am familiar with.
[Code]...
i am currently trying, to create some sort of a business logic within my class, that contains information about a machine, now this machine once sold, can be re-sold by its owner. the company needs to keep track of the machine and its owner for warranty claim purposes.the class takes in two values, a from date and a to date.now when a new owner is added to the owner collection of the machine, the TO date of the previous owner should automatically be updated to one day less than the From date of the new owner that is being added.
View 1 RepliesI started throwing exceptions on a multithreaded application, and got a mess.There is a good tutorial on managing exceptions in multithreaded applications?
View 4 RepliesI've got a "Loading" form which I display as a modal form when doing lengthy processes. I'm using the below to keep the form centred within the child form performing the process. However, when minimisingmaximising the "Loading" form appears before the parent making it look a little unprofessional. Anything I can do about that (Delay it appearing or attaching it in a different way)?
[Code]...
Now days it is done in Resources.Designer.vb we have there following lines:
Friend ReadOnly Property ResourceManager() As Global.System.Resources.ResourceManager
Get
If Object.ReferenceEquals(resourceMan, Nothing) Then
[code]...
I wish to develop a client-server application in VB.NET. I want to store some fields in Unicode. As per MySQL documentation I tried the fields with varchar and charset UTF-8 for storing Unicode data.I could insert data using the MySQL connector command object but when I try to display data in datagridview some junk is appearing.
View 1 RepliesI have a program in accounting that is used by many clients and users at the same time in a network. Many modules have a reference no. like in the receipt that increments upon saving, it also Checks whether that reference no. is already in used.
However problem arises when the many users use the same module at the same time. My question is How do you manage incremental values on each client's PC? Their local system somehow competes for the next incremental no.
i want to process a list of strings using multiple threads. the first function pases it, it then send the result to another, and finally that one displays the final result in list view
dim items as new list(of string)
private sub button_click()
start parsing thread
threadParse = New Thread(New ThreadStart(AddressOf startprocess))
threadParse.Start()
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Is there a quick and easy way to make a VB.NET user interface for managing the data in a normalized DataSet? I know that is a very subjective question, so let me explain. For a brief period early in my career, I used to create user interfaces in Microsoft Access. I developed a simple, but very effective approach to user interface design. Here are some details of that approach:
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What is a good approach to managing a debug and release connection string in a .NET / SQLServer application?
I have two SQL Servers, a production and a build/debug and I need a method of switching between the two when my ASP.NET application is deployed.
Currently I simply store them in the web.config and comment one or the other out, however that is error prone when deploying.
I'm making a LAN instant messenger and I'm trying to achieve something similar to how MSN will open a new chatting window when you double click on a friend. My main form has a list of friends, and I want to create a new chat window when they double click on one of those friends. I've created a "template" chat form which I want to generate dynamically, and I've run into some problems I need help with.[code]The form will only appear once as far as I can tell, and the chat form has events such as button clicks; an error occurs when I try to change something like the text property of a label for example (eg. clicking a button on the chat form changes the text of a label on the chat form will cause an error to occur). The error I actually get is:[code]Now, call me a newb if you will, but I really don't know much about threading and all that hocus pocus.
View 4 RepliesI currently have an If...Then statement that checks if all fields of a form have been filled before saving the info in a file. I'd like to be able to tell which field has not been filled to give the user a dynamic message (at the moment, it only tells them that the checklist is not completed ) :
If (txtNoDemande.TextLength = 8 _
Or txtNoDemande.TextLength = 13 _
And txtDateLoad.TextLength <> 0 _
[CODE]...
Is there a way to determine which of these conditions is false without having to do a seperate If statement for each ?
