I 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].....
I 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 ?
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 RepliesAm developing a server - client application using the system.net class , that will have more than 5000 simultenous client connection.what is the best way to manage multiple client connection like this?
View 3 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]...
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 have a main form having a comobox with categories populated in it. for adding new categories I have a button1 on this main form. On button1 click I am creating and showing a new form2 for adding new category. I want this new added category in my main form combobox on closing this new form. I have checked mainform_activated even but it is not fired on close of form2.
View 2 RepliesI'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. Lets look at the code I already have.
[Code]...
Now, call me a newb if you will, but I really don't know much about threading and all that hocus pocus. Some guidance in the right direction would be great.
EDIT: ClientWind is the chat form.EDIT: That's weird. It doesn't occur with the actual builds.
I have the requirement to create an application that has multiple front ends developed using Windows Forms, WPF, ASP and Compact Framework Mobile Forms.I would like to be able to create a series of obejct representing the business logic and have this logic accessible from the various front ends available. My first thought was to use remoting as I'd like to be able to pass the business objects back and forth between client and server but the compact framework doesn't support remoting and also transferring a full framework business object to a compact framework business object doesn't seem possible.My next thought was to use web services but again the passing of business objects seems to be very hard to accomplish. Without doing this I would have to create individual web methods for each business operation.
Finally my next option is to use sockets and write the whole client/server logic within some classes and expose them to the UI/Business layer. My only problem with this is it is not scaleable should the number of clients increase dramatically whereas using remoting or web services I can host the solution via ASP.Net.Does anybody have an ideas on the best way forward for this or even have any input on how they would write an application that required a windows form, wpf, asp website and mobile device GUI all of which want to use the same business logic?
I have googled high and low to find an answer to this but I must be searching wrong.I have an application which has a listview displaying some items that are stored in a SQL Compact database. I am using a second form to add new items to this list directly into the database.When the second form closes I want to call the sub in my first form to refresh the list from the database.
How can I get it to fire the form1 sub routine on the close event of form2
i was doing a fair amount of programming many years ago, like 10 it feels like, so I'm sorely not up to date on how my newly downloaded Visual Basic Express expects me to communicate with it.I am writing a program that pulls a cell from a database after the user has gone through several forms to determine which cells they want. When I write it like that, it doesn't sound very efficient, but I've designed it this way for usability.Here's where I have a problem: Should I store the path the user takes in a string, an array, what?
Here's an example:Someone wants baseball stats and trivia. They run my program, main form pops up, they select National League button, the NL Form pops up. Now the way my program is set up right now, is there are two ListBoxes on the form, one is populated, and as the user selects a Team from ListBox1, it jumps to ListBox2. Once they've selected all the teams they want info for, they click a button Next.
What I now need the program to do is show the next form "Team: name" once for each team, and insert the name of the team on the form in the appropriate label which I'll have blank. This form will also do the Listbox thing except the first listbox will populated with Topics like HR Stats, Pitching Stats, Coach History, etc.
Launch a dialogue window from the main form, and then another dialogue window from that dialogue window. If you close the second dialogue window and call dispose the main form vanishes under any other open windows. This doesn't happen by closing a dialogue window normally, but I am attempting (rightly or wrongly) to stop memory useage creeping up by disposing of it.
So, the question is - what method can be employed to maintain the position of the windows?
I have two forms frmMain and frmNew, and one module modMain. In modMain I hold public variables which are needed for application. My question is how to open and close those two forms when needed? I ask this because if i set frmMain as startup form, then when closed, application will end, and one of those two forms will always be displayed. Also if I set frmNew as startup form, then when I close this form, application will also end. Is there a way to do this from module or something so my application won't end after closing and opening any of those two forms?
View 2 RepliesVB.NET newbie here... I have an vb.net windows application set up. It has multiple forms, about 6 in all. There's a main menu form, and then 5 other forms to collect data. The user will collect data on each form and bounce back and forth between forms. How do I get the forms to retain the data that has been entered into the text boxes and/or other controls on the forms? For example, they might fill out a few textboxes on a form, but then need to go to a different form and fill something out... and then back to the previous form. Right now, when they come back to the form, all the data previously entered in to the text boxes is gone.
View 1 RepliesI am trying to write code with multiple forms. The first screen is splash screen then is supposed to close and have a calculations screen. In the timer of the splash screen I wrote the following code
Option Explicit On
Option Strict On
Public Class uiHinsbrookSplashScreen
[code]....
This opens the second screen, but when I Hit Exit on the Second Screen The first screen is still open. What do I need to do next?
I'm still learning vb.net, so I'm not terribly familiar with all the terminology, otherwise I would have searched a little harder before posting. I'm working on a program where the user can add various forms to a MDI parent.I would like each of the child forms to be part of the same array, all of the child forms will be of various types.Some forms may display a textbox, some forms may contain a graph, some forms may contain an image, etc.[code]
View 7 Repliesi've been working with multiple forms. here's the situation.. i have 2 forms form1 and form2 every time i show the form2 from the cmd Bttn in form1 then i close and reopen it again it always prompts me with disposal error.
View 3 RepliesIf I have a large number of classes, each similar to the other in certain aspects (they all share a common base class, but each does things differently), and I need to create Windows forms for each to allow easy changing of their values through a GUI? Create one matching form for each object in VS' forms designer, Or Use code to create the forms dynamically at runtime.
#2 makes the most sense to me, because a lot of these objects will share very common features of the form, notably "Ok" and "Cancel" buttons. But one object might need to draw a textbox on the form while another might need to draw a combobox. Not to mention, if I want to put icons on the "Ok" and "Cancel" buttons, I'd have to do this for each copy of the form in designer, and that sounds like it could get out of hand quickly.But is drawing forms through code sane? VS' forms designer is pretty sophisticated and designed to make life easier. Am I wise to consider ignoring its functionality and diving into the trench warfare of forms design through code? Or are there examples of automating form creation based on an existing object's properties?
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 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.
View 1 RepliesI'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 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?