What Is An Event Driven Application
Jan 21, 2009What is a event driven application.
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Event Driven Tcp Listener Method?
Aug 23, 2011I'm another newbie with VB (2010) so please bear with me. I am attempting to make a method that is event driven by data threads on the Ethernet port. Simply put, the method is to wait until a data thread from a "Control By Web" 5-input device sends an "information update" data packet to the application, with the application then processing the information. This application is on a private, well controlled network, with no access to the internet. I have a method that is working right now reading data packets when invoked with a timer (see code below) but I really need it to be event driven.
' this is added at the top of the class
Dim tcplistener As New TcpListener(IPAddress.Any, ip_port)
'this is added in the "form1_load" module
[code]....
Why Vb Is Called Event Driven Programming
Feb 9, 2010event driven programming
View 1 RepliesVS 2008 Database Driven Application?
Jan 22, 2010So. I'm making a tool for an online game called Shin Megami Tensei.In this game you can fuse Demons, depending on what family of the first demon you fuse and the second demon you fuse come from, and their levels, the outcome changes.This is unimportant though.
However, the application is driven by a database, the application consists of a Demonic Compendium (Index of the demons, including race, family, stats, levels etc.).This application is meant for usage by the community playing SMT, and here is the problem; a person without Microsoft SQL Server cannot run this application.I can't ask the community, some of which aren't very techy, to install Microsoft SQL Server 2005 Express Edition just in order to run this program.
You see my problem?Is there a way to get the program running on other computers that doesn't have MS SQL Server installed?
Deploy Database Driven Application Developed Using .NET?
Sep 2, 2010I have developed a windows application which performs a series of database operations like select, insert, update. I am connecting to Oracle database and its working fine in development system. But, when I deployed this application, I am getting error at StartConnection (which opens the DB connection). After installing OracleClient in client system, its working fine. Now, my question is that do I need to install OracleClient to every user? If so, it will be hectic to do so as its size is around 200 MB and its not possible to ask all the users to install it just for a small application. I have tried adding some OracleClient files like orannzbb11.dll, oraciei11.dll, iraops11w.dll etc. But in vain! Could anyone please suggest me a work-around or a way to accomplish this?
View 1 RepliesDatabase Driven Mail Merge Application Embedded?
Jun 24, 2010I am trying to have letter templates (word documents) that are stored in sql server VarBinary(max) to be accessed via a web application where they will be edited and saved back to sql server by directors of our company. Then various managers will be able to select an existing template (word document), make any additions, and mail merge with a list of customers to print or save the letters.
I am looking to open up word within a web page much like you would an email in outlook, edit it with spell check and the like, and then save it back in sql server. I am able to get word to open from a file but it is outside of the web application in a separate word document. I am storing the word document in sql server but am unable to open it in word without having to save it to a disk (why should you have to go to a disk for viewing or editing?). I am able to programmatically mail merge but that is in a separate word application.
I am finding bits and pieces on the web but nothing that will pull things together such as embedding word but in a windows app not a web app. Mail merge from a file not from a database, converting a byte array to word in a directory but not on a web page.
Create A Very Simple (to Begin With) Database Driven Application?
Nov 27, 2011I want to create a very simple (to begin with) database driven application. The company I work for have very kindly said they will host any SQL database I create, they have a remote server that we all connect to for files etc.
So I want to be able to create an SQL database that they can host and have my colleagues and I install the application local on our machines.
[Code]...
Database - Design And Deploy A Data Driven Desktop Application?
Jun 28, 2011I am designing a desktop application that will be driven by local data. I am trying to determine the best way to accomplish this. The database would contain about 10-12 tables if I use a database and I would imagine no more than 10000 records in any one table (but honestly 99% of users would not have more than 1000 records). I am thinking about using SQL Server Compact.
Is this a good solution? I can certainly include this in my installation, but I am just wondering if anyone knows of a better solution? If this is the best solution, how would you suggest that I create the tables upon deployment? Should I just run "queries" with create table statements in them from my vb application or include a database file or what?
Airline Reservation Application - Creat An Event Handler For The FlightBindingSource's PositionChanged Event?
Nov 27, 2010I'm trying to complete this airline reservation application, but having a problem in this part of the question:Creat an event handler for the FlightBindingSource's PositionChanged event: select FlightBindingSource in the class Name combobox then select position changed in method name combobox to creat the FlightBindingSource's PositionChanged event handler. Write a code to access the currently displayed flight object and pass its flightNumber to method DisplayPassengers as a decimal.This Is my code so far:
HTML
Public Class AirlineReservationForm
Private database As New ReservationsDataClassesDataContext()
Private Sub FillAll()[code].....
Dynamic Database Driven Menus
Nov 15, 2009I'm trying to construct a database driven VB.Net app that pulls a list of registered accounts from a database and displays the usernames of throes accounts in menu, so the user can select one and a new form open (where they work with it).what I have so far is the constructor for the MDI parent window.[code]What I want to happen is when a user clicks on the context menu a new MDI child form is created and the data in user is passed, however because AddressOf doesn't like passing data this doesn't work.I've looked at delegates and landa expressions but don't think either of them do what I need, the other option is to make my own subclass of the ContextMenuStrip class, which 1) handles the clicks the way I want to and 2) sounds like a nightmare.Before I launch into what I think will be a hell of a lot of work, am I missing something? is their a simple way to do what I want to do? or if not will sub-classing ContextMenuStrip work and if not any ideas as to what will (and if it will, any ideas as to how to start learning how to do that)
View 1 RepliesData Driven Class/Property Reference?
Feb 17, 2010I am trying to build a dynamic validator for a data entry application. I want to be able to query a table for the validators relating to the current task and then be able to reference class properties based on the description of the validators returned.
ex. Validator = "person/firstname"
How do I get to _clsPerson.FirstName?
Date Driven App - Object Binding Or DataSet
Jan 31, 2010I'm new to programming and am trying to learn how to developed data driven application and was wondering which method is recommended? I know there are some debates out there but most of the books I have recommend using object binding, but it doesn't offer any concrete information on how to implement it. I went to MSDN and most, if not all, the documentations are on dataset. So I guess my questions is, object vs dataset, which do you use?
View 9 RepliesMake A Data Driven App To Store Dvd Collection
May 12, 2009I am using VS2008 Pro. I have a simple DVD database built. I'm trying to make a data driven app to store my dvd collection.One of my tables is Actors and is structured as follows.[code]On a form in my app I have a combobox. I'm trying to make it list FirstName LastName ie. Will Smith. I know how to make a query that'll take the LastName and FirstName fields and list it as Actor. I'm having a heck of a time getting it to do that in the combobox as it'll only let me use one field for the display and won't let me use the query I've made.[code]I keep getting some error about schema don't match default query. I know I could simply change the table to only have one field that holds first and last name, but from what I understand that's not proper db practice. I've searched this site and google until I was blue in the face at looking at soulutions that don't match what I'm trying to do.
View 3 RepliesAsp.net - Write Use Case(s) & Test Driven Development For Binding A Gridview?
Mar 9, 2011I'm still trying to understand and use Use Cases and Test Driven Development, but having a hard time crossing the line. I'm hoping someone can provide a good example of how setting a datasource and/or databinding a gridview could be accomplished using Test Driven Development. Here is my pseudo approach at it.
[Code]...
Making OOP Via Observer Paradigm And Easily Adaptable To Test Driven Dev't
Apr 25, 2009How to implement an observer pattern in VB.NET?
Currently I have a lot of working code in VB6 which the company wants me to migrate to VB.NET. Well, that would normally be straightforward ... yes? Unfortunately, not so in our case.... recently, our company decided that I need to modify it to implement the MVC (Model View Controller) paradigm to make it truly OOP and adaptable to TDD (Test Driven Development).
Currently, my move was to start with a simple one, opening a form and then grabbing a piece of text from a textfile and putting it as the caption of the form... now, that is easy.
The problem lies in trying to implement observer patterns ... in the observer pattern I cannot simply call the usual me.caption = mytextstream.ReadLine from the form_load event instead, I need to use objects that would use an interface to register themselves as observers as the form loads but not necessary having to be residing in the form_load event... in fact ... if there is somehow a way for me to make such a thing happen before the code goes through the form_load event then that would more completely separate the View layer from the controller layer which gets implemented through the use of observers and observer related patterns.
Regex - Match Words Driven From A Database In A String Input
Jun 27, 2012I am trying to match words driven from a database in a string input using VB .NET
The syntax I am using is so simple:
[Code]...
Write A Menu Driven Program To Manage A Membership List?
Nov 30, 2011Public Class Form1
Class Member
Public Name As String
[code]....
This is what i have so far and its giving me headaches to fix it someone please help with this code assuming that the names and phone numbers of all members are stored in alphabetical order by last name , then by first name in text file residents.txt
Forms :: Database Driven Login Form With Admin Backend (Image Heavy)
Jul 19, 2008How To on a database driven login form. I'll include the Administration Backend to go along with it soon. Dial-Up users should not use this thread, it is image heavy
[Code]...
VS 2005 Display In A Datagrid Total Consumption Of Gas (litres) With Kilometers Driven (mileage) Between 2 Dates
Aug 29, 2011i am doing a small project for my business and i got stuck with this 2 weeks ago and still no progress.I have an access db table "store" that has columns: (filldate,brand,model,plateno,mileage,litres) where i am storing these info each time a car in my company fills gas. For example8/25/2011,Renault,Megane,5487844,3943,20).What i want to do now is to display in a datagrid the total consumption of gas (litres) with the kilometers driven (mileage) between 2 dates.
View 2 RepliesGet Templated Starter Database Driven Forms Generated In C# Winforms SQL Server Using Some RAD Tool Or Visual Studio 2010
Aug 11, 2011I hope I got all that in this question title. Let me explain. We are starting on small desktop app that will snowball into a big app with many forms. The database is SQL Server. It will have classic stored procs/functions performing classic CRUD functions. Given a table or stored proc in SQL Server what is the quickest way to create a form with all the hooks to maintain a table.
For e.g. lets assume I have table like this (most code below is pseudo code)
Table Employee
{
Name varchar(30)
DOB Datetime
Address varchar(100)
}
From this as source I want to create my Target which is form with 3 labels and 3 textboxes with add delete modify buttons (or OK button to add if not exists or modify if exists)
[Code]..
The code generation tool or technique that will be used should generate the correct db hooks (create SQL parameters, SqlCommand, execute sql.. basic try catch etc. Is there any open source tool to do this ? Some trick or templated approach via VS 2010 ? Worst case any third party tool ?
Keypress Event Outside Of Application?
Nov 7, 2009Is it possible to capture a keypress with my application, even if the application isn't focused?And if it is, could someone please point me in the right direction? (I.E things to look up, tutorials)
View 2 RepliesApplication.Exit() And FormClosing Event In .net?
Mar 27, 2012I have a single windows form application that is running in system tray icon.If the user press X button of the windows form a messagebox is displayed with Yes and No ( Yes ->close the form---No->keep the form running in system tray icon).I was thinking to prevent the scenario when the user open another instance of the application when there is already an instance running so i have used this code :
If Process.GetProcessesByName(Process.GetCurrentProcess.ProcessName).Length> 1 Then
MessageBox.Show("Another instance is running", "Error Window", MessageBoxButtons.OK,
MessageBoxIcon.Exclamation)
Application.Exit()
End If
The problem is that when i want to test this the message is displayed but after i press ok, a new messagebox appears (that one from Private Sub Form_FormClosing ).If i choose NO i will have to instance running!I have read that Application.Exit fires the Form_FormClosing event.Is there any possibility to cancel the triggering of the Form_FormClosing event?'this is the formclosing
procedure
Private Sub Form_FormClosing(ByVal sender As Object, ByVal e As System.Windows.Forms.FormClosingEventArgs) Handles Me.FormClosing
Try
Dim response As MsgBoxResult
response = MsgBox("Are you sure you want to exit", CType(MsgBoxStyle.Question + MsgBoxStyle.YesNo, MsgBoxStyle), "Confirm")
[code]....
Capture Keypress Event Outside An Application?
Mar 11, 2009how to capture keypress event outside an application
View 1 RepliesDetermine An Event From An External Application
Jun 6, 2011I am developing a program where I will save the information from a "Log file" from an external application..I have a biometrics system that reads and saves the log file to disk,once the user logs to the system, the system will save the file to a log file after that the system that i will develop will read the data from the "log file"(probably a text file) and send it to sql server.
View 3 RepliesDetermine An Event From An External Application?
Oct 21, 2009I am developing a program where I will save the information from a "Log file" from an external application..example: I have a biometrics system that reads and saves the log file to disk,once the user logs to the system, the system will save the file to a log file after that the system that i will develop will read the data from the "log file"(probably a text file) and send it to sql server what event should I use?
View 2 RepliesEvent Viewer Allow Application To Run When Start PC
Mar 22, 2010I recently created an event in event viewer to allow my VB.NET application to run when I start my PC up. Unfortunately, I don't remember how I did it and the thread I got the advice from has been deleted. Can someone explain to me how I could locate the event and delete it? As I don't want it to run on startup anymore.
View 11 RepliesGet A Keydown Event Even When Application Is Not Focused?
Jun 1, 2011How do you read a key down event when your application is not focus but other are?
View 2 RepliesKeydown Event For Entire Application .Net?
Sep 1, 2009I want to make it so that no matter which control has focus, it will do my event. So that I dont have to write a keydown event for all 137 of my objects. Is this possible?
View 2 RepliesMDI Application - New Input OnClick Event
Jul 9, 2009I have an Application with 2 forms
Form 1 = FrmWindow this is an MdiParent Form
Form 2 = FrmInput this is an MdiChild Form
On Form 1 I have a Menu that's says New Input the onclick event looks as follows.
Code:
Dim ChildForm As Form
ChildForm = My.Forms.FrmInput
ChildForm.MdiParent = Me
ChildForm.Show()
This works and opens the FrmInput as a child of FrmWindow. On the form FrmInput I have two Textbox Controls and 2 Button Controls.
Textbox 1 = TxtName
Textbox 2 = TxtEmail
Button 1 = BtnSave
Button 2 = BtnExit
On the On Click event of BtnSave I have
Code:
SaveInformation()
The Public Sub for SaveInformation Looks like this.
[Code] .....
So when you click the save button it inserts a new record into the table TblInformation on my SQL database, everything works great. Now my problem is I want to be able to open multiple instances of the form FrmInput at the same time. So I changed the New Input button to the following:
Code:
Dim ChildForm As Form
Dim ChildInstance As New FrmInput
ChildForm = ChildInstance
ChildForm.MdiParent = Me
ChildForm.Show()
This works and I can now open up mutiple instances of the form FrmInput, what I cant figure out is how to save the information on a particular instance.
Use KeyPress Event And Resize Application While?
Aug 20, 2009I've tired to use KeyPress event while in focus of my program's window in VB.Net, but it doesn't work.
For example I wanted to press the number "2" anywhere while in focus of the application and as effect the pixels of the window will change from 200,200 to 600,600 (hortizontal and vertical)
Private Sub Form1_KeyPress(ByVal sender As System.Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles MyBase.KeyPress
Form1_KeyPress(Keys.D2)
Dim size As Size
size = Me.Size
[Code]...