VS 2010 Database ADO Programming Required?
Jun 24, 2010
I am writing a program which includes access to a Microsoft Accsess database. It is running fine on my work computer (windows xp) but when I transfer it to my laptop (windows 7) to work from home it stops running on the "open" statement. I have stripped out all other code so that I just have a program with this in:
[Code]...
Again this will run fine on my desk computer but will not get past the open statement on my laptop.Interestingly, if I start a brand new project on my laptop and paste this code into it - it runs correctly.
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Feb 27, 2012
I have used ADOX for create some fields in my database in access but the required property of this appended fields (columns) are set in "yes" but I want to be them "No" who knows how can I solve this problem
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Sep 24, 2011
I don't know how to take input from user in sql statements, i'm learning from different sites so i don't know how to do it. Here's the code.
Public Class Form1
Dim con As New OleDb.OleDbConnection
Dim dbProvider, dbSource, sql As String
[code].....
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Sep 20, 2011
I want to learn database programming with SQL server, so I've have installed MySQL administrator 1.1.9 and MySQL connector net 6.4.3, is it ok with these or should I change?
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Jun 11, 2009
This is the error I am getting:
System.Data.OleDb.OleDbException was unhandled
ErrorCode=-2147217904
Message="No value given for one or more required parameters."
Source="Microsoft JET Database Engine"
My code is :
cmd = New OleDbCommand("SELECT [Employee] FROM [PhoneRecord] Where [PhoneNumber]='[(216) 370-1793]'", con)
If con.State = ConnectionState.Closed Then con.Open()
Dim sdr As OleDbDataReader = cmd.ExecuteReader() <~~~ERROR
While sdr.Read = True
User1.Text = sdr.Item("Employee")
End While
sdr.Close()
This was working fine yesterday, today all I did was change the database and its location as well as update all the dataset objects, and now its not working. The only thing I am thinking is that I didn't copy the database to the program directory, but I tried to copy it into there manually and I am still getting an error.
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Nov 4, 2009
I am building a program where all the inputs (10) required from the user are asked on one form. Since it is not possible to let fields blank on the database, I would like to know how can I build an 'IF' saying that if all fields are full, then the database CAN save all the input. So that if there are any field blank, it won't save. I just dont know how to do the database condition. Thats all.
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Oct 3, 2011
I am new to VB/VB.net and i will really need help in developing an application with VB.net and to be able to access the information via sms query.
[Code]...
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Mar 22, 2011
What is required to use SQL CE in a program? Does some version of SQL Server need to be installed?
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Mar 7, 2011
The app I'm creating is about ordering pizza, this is a screen shot of the form.At the moment, I have only set up customer 1, when i enter in all the information and click total at the bottom it is supposed to then display all of this information in the listbox at the bottom. But when I click total nothing happens I have looked at this over and over and can not understand why. Here is the code that I am using.
[Code]...
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Apr 8, 2011
I have a class set up to hold values on a registration form (VB.NET, MVC), and among the properties is a Password property:
[Code]...
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Jun 20, 2012
I have two text files, first text file looks as follows
File1
String1 String
String2 String
String5 String
String8 String
These fields match some of the fields in my File2, but here there is an extra column which shows a numeric field for that row.
[Code]...
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Jun 16, 2009
i'm new to database programming and am currently learning vb.net and ms sql. I was working on a simple add-edit-delete program and somehow i managed to make the Add button work, with this code:
Private Sub btnSave_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnSave.Click
Try
con.Open()
Dim sqlAddProduct As String
[Code]....
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Jul 30, 2009
I am working with MS Visual Basic 2008 Express Edition and MS Access 2007. I have managed to populate a temporary table with data from a text file containing eight fields. I have applied the namespace System.Data.OleDb What I want to do now is: 1) to order the data by a specific field (let's say Fld4); 2) delete duplicate records; 3) append the sorted data to a main table; 4) write the data from the temporary table to a new text file and save to a folder; 5) clear the contents of the temporary table
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Jan 13, 2011
I'm trying to build a login page and I'm having trouble programming the connection to the database.
The page can be found at [URL]
Here's the
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<%@Page Explicit="true" Language="VB" Debug="true" Autoeventwireup="false"
[Code]....
I'm thinking that as long as I have bin/MySql.Data.dll, I should be fine. I'm obviously wrong.
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Feb 21, 2011
I am trying to create a program to track how much money you earn until you have the amount you have been saving for.
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Oct 27, 2009
im building an application i started it in VB 2008 and i upgraded to VB 2010
then i made some mods and tryed to run the application and then
i get this error
Error2Reference required to assembly 'System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' containing the type 'System.Windows.Forms.Form'. Add one to your project.C:UsersAdminDesktop
[Code].....
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May 20, 2012
Close a database that we created by programming?I have created a database with below codes[code]...
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Apr 16, 2012
i am stuck on chap 10 question 3,6,10, i dont know why they are giving me a hard time.
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Feb 1, 2012
I'm updating a large VB6 app to .Net. The database design will stay mainly the same but I'm considering making a few changes. The one I'm not sure of is if I should change how the "totalAcres" for a "User" is stored. This involves three tables(I'll only list the relevant fields),
[Code]...
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Jul 21, 2009
The Calendar control (the Month Calendar) control in VB 2008. I am creating an attendance timesheet and I want the Calendar to color each date differently like e.g An employee Paul is selected from a list.
On the calendar I select the month. (The dates are not supposed to be selectable). Then lets say it is June. He is late on the 1st and the Second, so those days are supposed to be colored red (the whole block). Let's also say he is absent on the fourth and so I want that date to be coloured black. How do I do this? I tried finding a query and my friend told me that this functionality is not available in the current control and that I was best off making my own control (???).
I have tried selecting specific dates and bolding them (there is a function that allows this) but I am stumped trying to find two different ways to differentiate colours. Second:- How do I link a calendar with an Access Database?
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Oct 20, 2011
In an earlier post today [URL].. jmcilhinney in post #9 says,Quote: If you're going to use a DataSet at all then there's no reason not to use a typed DataSet. I would not recommend dragging items from the Data Sources window directly onto a form but that is not a requirement of using a Data Source.
I was wondering what is the down side of dragging items onto the form. I don't mind doing the manual programming, I would just like to know the reason I'm doing it.
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Dec 11, 2010
I'm using the following code
' Visual Basic
Private Sub Button1_Click(ByVal sender As System.Object, _
ByVal e As System.EventArgs) Handles Button1.Click
[CODE]..........
Its straight off the Microsoft site found here: [URL]
When I add the required components and click on the button, my app simply disappears, closes, goes right back into a stopped state. No errors, No Warnings, No issues. Nothing. Its as-if there is a stray "END" just before the IF statement. (But there isn't) Its stopping right at the IF statement. My app (THEIR CODE) just makes it disappear and "Stop". The code was working about an hour ago, but now nothing, and thats the only code on the project.
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Jan 28, 2012
I have recently taken a liking to programming, and have programmed a few games in C#,my friend has asked me to program an application for him to use in his shop. But I have no idea of what language is best suitable?
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Apr 13, 2012
When I run the following code I get two errors. The first is when I try to save a new set of data it tells me there is a "Syntax error in INSERT INTO statement". The second is when I try to save an update in tells me "No value given for one or more required parameters". I'm not sure why this is happening as before I added in Contact Deatails it saved fine.
[Code]...
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Feb 26, 2011
Iam developing a Windows application using Visual Basic 2008 with a SQL Server database. Throughout the program I give the user as many options as possible and have no problem with either the database or the windows forms. The program does not initially require a Login and I want toprovide the User with the opportunity to add a Login to the system. The default Login form is perfectly satisfactory.
The problem is that I can't figure out how to program the change sothat the Login from isopens the program rather then th form designated as the StartUp form. this forum I am able to prgrammatically change the form but I can't figure out how to make the requirement a permanent factor. I tried using a Constant, but if the User wants to change, you can't change the constant. Its an apparantly simple yes/no situation but if I set a varable to yes and then change it to no the next time the program runs, the change will be lost.
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Jun 30, 2011
I'm actually a beginner in VB express. i made about 10 easy programs, now i decided to make one a bit difficult. I'm stuck at the beginning.In first form i have 2 Textboxes and 1 Button (1username, 1password, button - sign in) and then another 2 Textboxes and 1Button (1username, 1password, button - register) I want to make something like this for beginning: When you register the infos from textboxes (username & password) are saved in some file (let's say in info.txt or info.ini). I actually want to know how to automatically save these usernames and passwords in text file when you click register button, so when you want to login, you have to use registered username&password. So if there in text file is not the username you registered or typed in textbox you can't login.
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May 23, 2011
I have an application I am developing in Visual Studio 2010 with Visual Basic. Eveything has been fine with no errors, warnings or messages. Now I am getting this and am not sure what part of my application is causing it. It looks like Datasets may be one of them? Any help would be great. It still compile runs and works on client PC however if there is a glitch in the application I want to fix it.
Warning 1 At least one of the arguments for 'ILabelObjectDs.get_ObjectName' cannot be marshaled by the runtime marshaler. Such arguments will therefore be passed as a pointer and may require unsafe code to manipulate.Warning 2 At least one of the arguments for 'ILabelObjectDs.get_Value' cannot be marshaled by the runtime marshaler. Such arguments will therefore be passed as a pointer and may require unsafe code to manipulate.
Warning 3 At least one of the arguments for 'ObjectStringSubString.get_ObjectName' cannot be marshaled by the runtime marshaler. Such arguments will therefore be passed as a pointer and may require unsafe code to manipulate.Warning 4 At least one of the arguments for 'ObjectStringSubString.get_Value' cannot be marshaled by the runtime marshaler. Such arguments will therefore be passed as a pointer and may require unsafe code to manipulate.
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Feb 25, 2011
Every time I compile my application, during install I get the error:Cannot download application, the application is missing required files
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Jun 19, 2010
can i know what .net framework is required for my application that has been developed under Microsoft Visual Basic 2010 Express.
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Jul 18, 2011
Does vb 2010 have a 'REQUIRED" property or control that allow you to make a textbox a "required" field? I googled and saw something about required property in controls in toolbox but somehow I could not find it anywhere in my vb 2010 toolbox. Would it be easier to write it? Does anyone have sample code?
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