Database Interaction From Within VB 2010?
Jun 29, 2010
I am using VB within the Visual Studio 2010 platform.I have created a simple Database with Access.I have connected my database to my VB 2010 project using the Visual Basic BindingNavigator object.I now need to navigate my Database with code from within VB 2010.
1) More specifically I need VB routines that allow me to:
·
GoTo first record
·
GoTo a specific record
·
MoveDown one record at the time and sense the EOF.
2)I need to add new records at the end of my database as data become available through a change in four text boxes.
3)I need any other VB 2010 statement or routine that might apply to Database navigation and communication from within VB 2010.
My Database consists of four columns: Date, Time, Bid (Double Integer), and Ask (Double Integer), and was created with Access.Is Access the best solution for creating a Database today?
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Mar 12, 2012
I've been studying design patterns off-and-on now for a project I've recently been working on. I've been fortunate with this last one not to have to work with databases, but will soon have an opportunity.
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May 2, 2012
Using Visual Basic 2008 express, I would like to access a database with 2 tables, one table (useraccounts) which has Users and Password and ID, and the other table which has information (linktable). Basically I would like to do a login form which reads from the table useraccounts and be able to create new users which will write into the database.
Another is that I have a form with a number of links which I would like to store in the table 'linktable' and it basically just gets the links from the table and straight to the form where it is used. I have tried using access or the .mdf files that visual basic has but I have been unable to find an answer for either.
I wouldn't mind using either access or the .mdf file for the database, I would just like it to work. Overall I am trying to get:
Login form which reads from database table 'useraccounts' and has a new user feature
Just a form that can read / write to the database once the save button is clicked.
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Jun 25, 2010
I have one table here with a list of UserIDs, Users, and ClientCodes. Each user can be assigned a client code to view that client's data elsewhere. Right now I have to change it for everyone via SQL Server and actually going into the table manually, but I'm trying to make a simple little program that will let the user change it themselves. All I need is a textbox that pulls the user based on a certain UserID from the table, and a drop down list that will not only show the current ClientCode they're set to, but allow me to change it and save that change to the table in the database.
What's the best way to go about this? I tried using the wizards but I guess that's not the best way to go about it. I have it displaying the correct user and their current ClientCode but that's about it.
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Apr 5, 2011
I'm currently pulling HTML data from a database and displaying it in a WebBrowser control in my VB.Net application so that it's correctly rendered. The next step is to print it, but I need to be able to send it to a specific printer rather than the default printer. How can I accomplish this?
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Jul 16, 2010
I'm currently pulling HTML data from a database and displaying it in a WebBrowser control in my VB.Net application so that it's correctly rendered. The next step is to print it, but I need to be able to send it to a specific printer rather than the default printer.
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Jun 13, 2011
If I create a windows app which I link to an MS Access databse file that already exists..will I need to have MS Office installed on every computer at which I want to use the app? If not then how do I go about making a standalone windows app that will store information in a database of some form or another ?
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Jun 30, 2010
I was wondering if it is even possible to interact with other websites using my own.Here is the scenario: Lets say I have a Lockerz account, which is a place where you do daily tasks to earn points. Once a month you can redeem those points to get prizes such as an ipod, macbook, or other items. I know that sounds rediculous, but stay with me.
For someone to gain membership to this website they must be invited by a member. So I get your email address then log in to my account, then send you an invite from there.What I want to do is create a website where a user enters their email into a textbox and presses a submit button. From there the program, behind the scenes, sends my login information, and the users email address to lockerz and sends the invite. All without ever leaving my site.I have worked with ASP.NET with VB codebehind for a while now, so I understand the basics of that. I am just wondering if what i want to do is even possible.
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Apr 7, 2012
I have two following rows of code:Microsoft.VisualBasic.Interaction.Beep()or Microsoft.VisualBasic.Beep()The result is the same in this two rows.what is Interaction class?And when shold i use it?
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Apr 3, 2010
I have a static picture, one for hover, and one for press.is there a way to make the picture change depending on my actions with the button?
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Apr 15, 2008
I would like to prompt the user, in the middle of a VB program, either with MsgBox or any other dialog, to input data in a worksheet of the Workbook that contains the code and then, on some event, read the data and continue execution. I was not successful with MsgBox (and other forms) since it is modal. The user cannot get focus on the worksheet, input data and then continue execution by clicking a command button.
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Jun 18, 2009
In the application I'm actually building, I'm dealing with two dynamically-added controls that need to interact with each other, but I've reduced the problem to an as-simple-as-I-can-make-it example with the controls being statically loaded, and it still presents the same problem: a NullReferenceException when invoking the delegate. Here's the gist:
Control 1
Partial Class Control1
Inherits System.Web.UI.UserContr
[code].....
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May 7, 2011
I have set up a scrollbar to have a value between 0 and 264 (i.e. 0-255 when taking the width of the slider into account). I also have a text box that is set up to display the current value of the scrollbar as an interger. However I am currently unable to enter a value in the text box which also moves the scrollbar to its equivilent position. The closest I've been is when I was able to change the value but kept ending up with an error when a number above 255 was entered or when there wasn't a number in the text box.[code]What I am after is to be able to enter a number between 0 and 255 (and only a number between 0 and 255)in the text box and it change the position of the scrollbar accordingly and to omitigate the errors which occur when there is nothing in the text box by accepting an empty box as 0.
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Sep 1, 2010
On my program the user clicks a button which then runs the main code for my program. The problem is once the code is executed I can no longer move or interact with any form boxes, reliably at least . Sometimes there will be a period of delay where I can move it for an instance. Is there anyway I can make it so that my form is able to be moved while the program is running?
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Dec 21, 2011
I think I started out with a misunderstanding of what happens with addnew() and canceledit().
I have a strongly typed datasource in memory.
I call bindingsource.AddNew()
Later I find that the record the user was trying to add already exists, so
bindingsource.CancelEdit()
I have not set any properties other than datasource on the bindingsource.
My assumption was that the CancelEdit() would rollback the blank row added by the AddNew(), but I'm getting some odd errors which lead me to believe this is not true.
Could someone verify that CancelEdit() leaves the new row?
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Apr 8, 2010
I have a small program I have designed to be able to sit in the background on my desktop, and whenever a new form is given focus (foreground) it's title and thread are recorded.
However, I would like the program to also report to me the X and Y coordinates of the foreground form. Could be any form NOT one that is attached to my program.
[Code]...
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May 30, 2009
as above how to do that man? I will also want to extract the information to be sent from the database. An example of what i am going to do is something like this:
Reference:[URL]..
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Jun 3, 2011
I have a preloader app that runs before the Main application and performs an Update check.. (and then installs the latest update) it's come in very handy at the current client I'm at as there are going to be several hundred installations of the App on site.. Also it's a Live Development.. (One app that handles the Full Plant Monitoring and maintenance) .. But that's not the problem..
The Preloader simply checks on the server if there's a new Update, Copies it down and then runs the Main app.Now there are several Configurable routes through the app: Quick, Skip, Auto, For now the Default is Ask.. and in this mode, if there is an update, the Preloader will ask if you want to install it, if not it will wait 10 seconds and start the Main app.
My problem is If there is no user interaction with the Preloader, windows thinks that it terminated incorrectly, and throws up one of those "This program has stopped working" (similar to image below).
If the user however simply clicks the Done that clears the timer, or clicks the Yes/No for the update, no problems.
[Code]...
So the problem .. If there is NO user interaction, Windows (XP Sp2 mostly) thinks it crashed.What can i include to let windows know that the application does not require User Interaction.
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Dec 7, 2010
I would like to keep part of an Excel workbook open to the user (including some VBA code) while protecting other code. What I hope to accomplish is to rewrite some of my code from Excel VBA in VB.Net and compile it into a DLL which I can then call from Excel VBA. I want end users to be able to modify most of the code in the module, but some of the process should never be touched. Say I have an array in VBA
ArrONE(1 to n, 1 to n)
I would like to pass this through into a DLL and return a new array back to VBA:
ArrTWO(1 to n, 1 to n)
1) What are the best resources for VB.Net?
2) What are some main differences between VBA and VB.Net code
3) I have read that VB.Net doesn�t handle Variant data types, which (as far as I know) is a requirement to perform matrix multiplication in Excel VBA. Any detail on this issue would be of use.
4) VB.Net test environment? I often use msgboxes or simple subs printing to a spreadsheet to test my code in Excel VBA as I go to make sure everything I code is working properly before advancing. What would be .NET equivalents.
5) How to compile VB.Net into a DLL
6) How to call a DLL from Excel VBA
7) What effect will this have on the speed of my procedure?
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Nov 13, 2009
What I'd like to do is when a user clicks a button in my windows form application, it launches IE etc and opens webpage, sends the username/password stored on the pc and logins into the main page.Some background-the password will be stored in a txt file on the pc in encrypted form-the webpage am login into is a aspx company intranet page-security is really not a major issue as everything is internal-the main page of the intranet page is just two textboxes asking for username/password before going any further. There is a button to login on the webpageIs what am trying to do possible as I really do not have understanding of how the login page works underneath or for that matter much about HTTP post requests etc
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Dec 23, 2010
I was wondering if you could offer a hand on something I'm finding a bit tricky.I am looking at basic shell integration. That is, when a user right clicks a file they can select an option that I have specified. Clicking this will allow them to do various functionality. The way the shell is working for me is that I have a registry entry which runs a specific file. That's all well and good but I need to communicate with a process that is already running on the local machine. (To prevent the users from having to enter login details multiple times).
So I need a way to launch an application, which can call a function in a process that is already running, and pass through the file path. The other application takes the filepath and does whatever it needs with it.
I have both separate sides of the application working (it can get the file path fine, and the other application knows what to do with a file path). The problem I am having is actually linking the two together.
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Mar 14, 2010
I have a winform project which lists all the files in a specified folder. It allows the user to select a new destination for each file, and when the user has chosen the destinations for all files that he would like to be moved, it moves the files, one by one.My next step is, I need to display a confirm form when the files are being moved, and add each file's name and destination to the confirm form as it is being moved.How can I add more text to the confirm form's controls after I already loaded it (using confirm.showdialog() from my other form, without any user interaction? I imagine that I need to do it from the original form, because it needs to display each one when it starts to move that file?
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Dec 4, 2009
Using VB.Net 2003, how do you code to send an email with no user interaction? I do not want any windows to open or require any sort of input from the user. The idea is for the user to be able to request technical assistance by simply pressing a button.
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May 24, 2011
I've written a program using Visual Studio 2008 Standard Edition in Visual Basic. It's a Windows Forms Application. The program is very simple, it just reads a directory of text files, parses the text and outputs another text file as .CSV file
for import into Excel. There's no user interaction required but it never displays the form and therefore the progress bar. If I put a GO button on the form and modify the program so that the subroutine that does the processing isn't called until the user clicks GO it shows the form and the progress bar etc. How can I make the program run at startup, show the form, show the progress bar and then pause for 10 seconds or so and then exit?
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Aug 12, 2010
I have a multiple project solution with a main MDI form in the root of the solution and the child forms in individual project beneath the root. Like this
Solution1
.. frmMDI
Project1
....frmChild1
[code]....
To interact with the children I set a Resource to Project1 and Project2, and from frmMDI I can interact with Project1.frmChild1 and Project2.frmChild2. I have a toolbar on frmMDI that I would like to interact with from the children. If the children are in the root of the solution, I can interact with the toolbar by simply addressing frmMDI.toolbar1. I can't figure out how to interact with frmMDI when the children are in individual projects. That is, the children do not seem to see frmMDI in the root of the solution. I can't set a Resource back to Solution1 because it would be circular.
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Aug 9, 2010
im working on a little project what executes a bat file on a button click using this command:Interaction.Shell("read.bat", AppWinStyle.NormalFocus, True, -1)however when this is executed the program will become unresponsive while it is running... this may be simple but is there a way i can make my program be responsive and for it to execute in the background?
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Apr 13, 2011
This IS a project for the class. HOWEVER, this class is *NOT* a programming class, but is called "Usability Engineering", which aims its goals at creating a better user interaction. I'm not sure of what the "homework" policy is here, but what I am asking isn't for getting a grade, as the grade isn't based on my ability to program here. But nonetheless I am a C++ programmer at heart and VB makes me groan a little bit.
^ The program: Our goal with this project is to make a program with only five buttons (Aiming to be a cellphone type system, I know, the resolution is huge.), The buttons are the arrow keys, and enter. When the user selects a textbox, it changes the focus to the keyboard and then allows input via moving around and hitting enter.
My first problem right now, is that when I use my arrow keys, if I press RIGHT or DOWN, it will only go right, and if i press left or up, it only goes left.
The second problem, is that the buttons are out of order... when I am on "P", and press right, it actually hops down to the space bar button instead. I'm sure this is just some sort of container that can be modified, but I'm unsure of where it is.
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Jan 18, 2012
I want to open a notepad file using VisualBasic.Interaction.Shell method. At present I get a file not found exception using the following code.
int pid = Interaction.Shell(@"D:abc.txt", AppWinStyle.NormalNoFocus, false, -1);
But this works:
int pid = Interaction.Shell(@"notepad.exe", AppWinStyle.NormalNoFocus, false, -1);
[code].....
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Apr 20, 2009
I am comparing an alternative Dispose pattern to VS2005's default implementation. In doing the comparison I have found several uncertainties with the default pattern which have raised a handful of questions related to sub-class implementations and object Finalization.
[Code]...
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Jun 4, 2011
Not so much a VB question more of a Net question.Does anyone have a logical explanation as to why the Maximum value of a Scrollbar is impossible to reach by user interaction?The documentation explains clearly the how, it just gives no reason for the why.
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