OLEDB Connection - Pull Information From Three Different Database Tables And Compiling The Information Onto One Screen
Jun 9, 2011
The program is currently trying to pull information from three different database tables and compiling the information onto one screen, to do this i am using three different connections and a function to handle the data at each stage. The issue is as my code hits PageLoadStage of "2" and runs the QueryDatabase() Function i am encountering an error of: "OleDB exception unhandled: No value given for one or more of the required parameters." This occurs on line 15 of the first code snippet. Can anyone explain this and/or identify any code issues if that is the cause.
[Code]...
View 8 Replies
ADVERTISEMENT
Feb 2, 2011
I was looking for some stuff online, and i was looking through my reference sheets for vb.net, but it seems in the code i have found, there is declare in methods. Below is an example i am talking about. The thing is, that i dont recognize it and believe that it is an earlier version of Visual Basic ( 6 or earlier) which used it. Should i just keep looking for different code?
Public Declare Function RegOpenKey Lib "advapi32.dll" Alias "RegOpenKeyA" (ByVal hKey As Long, ByVal _
lpSubKey As String, phkResult As Long) As Long
Goal: Find information on how to implement a method which will check if a certain DSN exists, and then if it does, extract the information and use the information for connection purposes.
View 2 Replies
Apr 19, 2009
I am trying to create a log in screen for my program using data from an access database. I am trying to load the data from the database so that I can use it to check if a username and password combination is valid.
View 2 Replies
Dec 22, 2011
I'm wondering if I create a program that connects to a mysql database, will they be able to decompile it and do anything with the mysql connection information?
View 18 Replies
Jun 10, 2011
I'm trying to pull information from an XML webpage but for some reason it just isn't working. The XML webpage looks a little like
<?xml version="1.0" encoding="UTF-8"?>
<item>
<reqdat>Date and time</reqdate>
<result>Completed</result>
</item>
I want to get the node, but everything I've tried hasn't worked :( I think what I need to do might have something to do with SelectSingleNode but I'm not sure.
View 1 Replies
Jun 21, 2010
I am building a program using VS 2010.It needs to be a set of forms that allows a manager to log in so that data entry people can enter in data based on another form.I also need to create a hot key set up that pulls up another form so that a supervisor can pull up the information that employees have entered.I have my solution file that I can put up for a download if needs be to see what I'm talking about. I don't think it should be that hard to make this program work.
View 3 Replies
Mar 19, 2009
I have tried to do some research on my own but I haven't found anything substantial. I was wondering if it is possible to pull low-level hardware information off of a HDD or stick of RAM using the latest visual basic.net. Mostly curious in pulling serial number and model number.
View 2 Replies
Jul 3, 2010
I am having trouble with this list box assignment. I am supposed to pull the information from a text file in the debug folder. The problem is the code looks perfect to me, but when I debug, the first line that starts with : lstSummary.items.add returns as being in the wrong format. The code is below.
Private Sub btnSummary_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnSummary.Click
Dim strAccount As String
[Code].....
View 3 Replies
Jun 26, 2008
I am new to Vb script or any scripting at all. I have made a script for reflections that run vb 6.3 macros I have modified the original script to use msgbox and input boxes as below:
[Code]....
View 7 Replies
Oct 2, 2011
I want to pull information from an array and place it into a chart of text boxes on the form. I have used a control array before but this time I want to create a dwo dimension control array. My guessing is not working... The display will be 10 x 10?
View 4 Replies
Jan 28, 2011
Im using visual basic 2010 and im building a program that will basically, you click on something in the list it will automatically open a .dat file pull the information that it needs, and then proceed to enter it into a box on the right. Well heres my issue i know how to do everything else but i cant seem to imitate this image, i need to know how i can make a list like this where the whole row is selectable, and the items/subitems are divided.
View 9 Replies
Feb 15, 2012
what i need to do is to get information from 2 tables and show it to the listview. for example, i want to get the surname, first name and middle name from the student_info table and the Payment_Status from the accounting_system. i don't want to show the information that is already on the accounting system that has 'Paid' on the Payment_Status.[code]but the listview only showed the first data on the database
View 10 Replies
Feb 8, 2012
Dim LocationList =
From rows In db.Locations, clientRow In db.Clients, stateData In db.Ref_States
Where rows.State = stateData.ID
Select ClientName = clientRow.Name, rows.ID, rows.Address1, rows.Address2, rows.City, StateName = stateData.Name, ShortStateName = stateData.ShortName, rows.ZipCode Order By Address1
That's what I have and it is very wrong. Everything shows up, but the data displays incorrectly, displays more rows than exist.
Dim LocationList =
From rows In db.Locations, clientRow In db.Clients, stateData In db.Ref_States
Where rows.State = stateData.ID And rows.ClientID = ucClientID And rows.ClientID = clientRow.ID
Select ClientName = clientRow.Name, rows.ID, rows.Address1, rows.Address2, rows.City, StateName = stateData.Name, ShortStateName = stateData.ShortName, rows.ZipCode Order By Address1
View 1 Replies
Jan 13, 2010
I have to tables into my SQL Server 2008 database
1st table: tblUser (user_id, user_name, user_photo);
2nd table: tblAccess (id, user_id, status_access);
I need to permit access or denied access using this 2 tables....
The problem is: When the user type a 'user_id' in textbox, the application go to table tblAccess and verify if the status_access is true or false.... if is false, the application show a msgbox saing "Access denieded"... when status_access is true the application go to table 'tblUser' and get user_name, user_photo and show the user photo to the picturebox, show the user name to the labeltext and a message box saying : access permited...
How can I do it in VB.net 2008
View 3 Replies
Aug 15, 2009
The code I am having problems with is supposed to take a ID number and load the information from several different tables into a game object, then return the object. When it tries to load the data into the object I get an error saying there is no data in the row or column. [code]
View 2 Replies
May 24, 2012
I have a text box where i am entering numbers of double datatype andon the Keytdown event of the textbox some checks take pace and in certain circumstances I want to be able to stop the user from entering other information until they enter the right information in the textbox (where it says right here) . now when I say exit sub the textbox somehow loses focus . but this is not how I want it to be I want the textbox to remain with the focus so the user can change the information . How can i go about this. And the other thing is why is my txtDestPayRate1.Focus() just befor the exit sub not working?
Private Sub txtDestPayRate1_KeyDown1(sender As Object, e As System.Windows.Forms.KeyEventArgs) Handles txtDestPayRate1.KeyDown
If e.KeyCode = Keys.Enter Then
[CODE]...
View 2 Replies
Dec 3, 2009
I am designing a backup/restore utility for work.atm i have been able to populate field for PC name, IP address, MAC address, number of printers installed on the PC but i am wondering is it possble to get all the printer information 'with the click of a button' to print all information like the prnmngr.vbs script down.I am able to run a batch file but i wanna get it to go from that app or even embed to batch file to the app and run it form there .
View 4 Replies
Dec 31, 2011
I am having a very strange problem that started after installing the Visual Studio Service Pack 1. Let me first lay ground work, forgive me if it gets a little long, but I need to give all this info for this to make any sense.I was having a problem with one of my forms not saving changes made to the child data on the form. So I decided to rebuild the form with no code other then the bindingnavigatorSaveItem_Click and the load statement.
When I tried to save a change to the data with the new form I got this error message: �TableAdapterManager contains no connection information. Set each TableAdapterManager Table Adapter property to a valid Table Adapter instance.� Using a break point I stepped through the code into the DataSetDesigner.vb and found the error was originating from this piece of code
Dim workConnection As Global.System.Data.IDbConnection = Me.Connection
If (workConnection Is Nothing) Then
Throw New Global.System.ApplicationException("TableAdapterManager contains no connection information. Set each TableAdapterManager TableAdapter property to a valid TableAdapter instance.")
End If
I had just installed an update to Visual Studio 2010, Service Pack 1, so I thought that had hosed my entire project so I opened my previously created form to test a save with it and did not get the error. Very strange both of these forms are using the same table adapter manager and both jump to the same dataSetDesigner.vb code, so why the different results.
I then followed the code from both forms and saw something even stranger. The original and new forms follow the same code logic until they get to this piece of code in the dataset vb code:
If ((Not (Me._tblIncidentTableAdapter) Is Nothing) _
AndAlso (Me.MatchTableAdapterConnection(Me._tblIncidentTableAdapter.Connection) = False)) Then
Throw New Global.System.ArgumentException("All TableAdapters managed by a TableAdapterManager must use the same connection s" & _
[code]....
It then returns to the first If statement shown above and processes through without the error.has anyone had this error after installing service pack 1 for VS 2010 and if so did you fix it. And why would the code leave the If statement, jump to another function without any visible call to that function, that I can see.
View 2 Replies
Oct 12, 2010
I have legacy hardware in our building that can accept commands via TCP as long as they have formatted XML in them. Using Wireshark, I have determined the proper format of what needs to be sent.
The problem: When using the original systems controller, I can look at the packet that is sent and see very specifically that there is a section for "eXtensible Markup Language" that has everything laid out properly. When I create my own TCP stream and send the same information, it gets sent as Hypertext Transfer Protocol text, and thus is not picked up.
My code is as follows:
Dim tcpClient As New System.Net.Sockets.TcpClient()
Dim bytes(tcpClient.ReceiveBufferSize) As Byte
Dim clientdata As String = ""
[CODE]...
View 6 Replies
Oct 21, 2010
My goal is to, Pull information from a websight's textboxes in IE into my program textboxes. and to later Put changes from into other values on the websight from my program into it. The sight has multiple textboxes, on different frames. within it.I need to keep it as a exsiting open browser instead of making a new one. only gotten as far as finding the open internet explorer window, by useing
[Code]...
View 2 Replies
Feb 9, 2011
I have an application with a datagrid and a save button.Here's the save button
Private Sub SaveButton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles SaveButton.Click
Me.Validate()
Me.PlayerCharacterBindingSource.EndEdit()
[code]....
I'm getting the following error upon clicking the save button."TableAdapterManager contains no connection information. Set each TableAdapterManager TableAdapter property to a valid TableAdapter instance."
It's on this line: Me.TableAdapterManager.UpdateAll(Me.DataSetPlayerCharacters)
View 1 Replies
Dec 15, 2010
I got this monitor that can turn 90 degrees & another program will rotate the display when it detects it has been rotated, I have a few questions though.
1.How can I detect when the monitor has been rotated (the monitor is hooked up via vga & no other cable goes to PC so I am guessing the message is sent across the vga cable).
2.How can I make it actually rotate the screen when the message is detected that the screen has been rotated?
I would download the other software but it's just some bulky & slow software for a small thing, windows has the ability for rotation built in, just not the auto rotation feature like the program, I just need to detect the message & make windows rotate the screen.
View 1 Replies
Jul 2, 2010
I'm starting to learn programming in Visual Basic .Net , I need to open an excell file show the information on the screen,
View 2 Replies
Dec 5, 2006
I am faced with the prospect of having to completely rewrite the application.I have suddenly started to get this error message all the time - it seemed to start after I added a table to the schema, but deleting the table makes no difference. I can't see anything wrong with the connection string, but as it seems to be entirely undocumented, that doesn't mean much.
The connection string contains DataSource=.SQLEXPRESS;AttachDbFilename=|DataDirectory| est.mdf;Integrated Security=True;User Instance=Trueand certainly the string works when I use "test connection" from the application setting edit box. I am assuming that for some reason it is not evaluating the Data Directory , but can't see any reason why it shouldn't. Any ideas gratefully received! What might be a clue though is that I can't get rid of the table I added. I have deleted it from the database, deleted it from designer and saved the file, but it just keeps reapearing! Even when it is not showing, there is still a
table adapter in the .xsd file. I am reluctant to start editing this manually because of the danger of screwing something else up - I did try but it caused an error somewhere else (VS helpfully didn't say where)
View 1 Replies
Jan 2, 2010
I'm using a OleDB connection to a access database. I'm entering a row into the database to set some user preferences. What i need to get is get back the row ID of the row I just entered. I'm more familiar with PHP and with PHP I use use this entry
[Code]...
View 4 Replies
Aug 27, 2009
I am using VB2005 and trying to put an application together.What it needs to do is retrieve information from a binary file, possibly alter that information, and put it back into a new file.The file is a .wav file with data appened to the end. There is an additional section at the end of the .wav file which stores xml data.I have found that if I open this in a hex editor and make a 1:1 swap on any of the bytes that the application that the file is for can still read the XML.If I tried to add or remove characters from the XML then it would not read. I located a header byte and incremented it to resolve this.
This worked as an excellent bandage to do conversions where the data always needed to be changed to the same thing.What I have been asked to do is build logic that allows for different things to happen depending upon what data is contained within the file.The method that I am currently trying to impliment is:
Read through the file with a system.io.binaryreader
Searche for a bytestream that will signal data is coming
For example:
If System.IO.File.Exists("C: est estread.wav") Then
Dim findit() As Integer = New Integer() {&H3C, &H55, &H73, &H72, &H44, &H65, &H66, &H30, &H31, &H30}
Dim i As Integer[code].....
And then extract all the data till the end of element marker "<" It seemed like there should be a better way and I was looking for some insight. If I proceed with this method, I will have to read the file one time to gather the information and then a second time to write it all out with the header modified for length.This is my first experiene with working with binary files in this way.Also,I've been experiementing with building a string and slapping it back in at the end using the binarywriter.write(string) method.I noticed that it was putting in header characters before the string.These seem to change if I change the length of the string.At one point it was d0 07. Later it became e7 07. Does anyone know of a way to prevent this header from being inserted?
I tried a for each loop to grab all of the characters from the string, convert them to a byte array and deposit the byte array into the file, but the header remained the same. When I write the byte array generated from a system.io.binaryreader I do not get this header.
View 1 Replies
May 28, 2012
I am trying to get an Email and password from a database and use them as a log in (not acces database) i tryed rdr = mycommand.ExcuteReader but that dosent work [code]...
View 2 Replies
Oct 25, 2010
Is there an external gadget that i can use say a phone or any other to get information from my database?
View 4 Replies
May 26, 2010
I want to get information from database and then i want to assign this information to label's text or textbox. I wrote sql codes and i used OleDbDataAdapter.
SELECT soruno, soru, cevap1, cevap2, cevap3, cevap4
FROM quiz
WHERE (soruno = ?)
Then i wrote codes that OleDbDataAdapter1.SelectCommand.Parameters.Add("soruno", OleDb.OleDbType.Integer).Value = 3
View 4 Replies
Dec 18, 2011
During Runtime when it tries to open the connection it throws up this error.System.Data.OleDb.OleDbException was unhandled'
View 9 Replies
