Reading Data From A Database?
Mar 16, 2012how can i display data from a sql database in a listbox?
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Arranging Data Reading In From A Database
Jan 9, 2009Private Sub frmAttendace51_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
'clear data set of any existing data
objDataSet.Clear()
'fill schema
[Code]...
Reading And Modifying Data From Database?
Jan 25, 2012reading and modifying data from database
View 4 RepliesReading Data From A Database Query
Feb 4, 2009I made a query in MS Access using fields from multiple tables. I want to display stuff from it into a listbox on the form and then I need to save stuff back too it also. But I'm obviously doing something wrong cos I keep getting the error: "The Microsoft Jet database engine cannot find the input table or query 'Today'. Make sure it exists and that its name is spelled correctly." [code] Also, I have written further down objDataSet. Tables("Today's Absentees") and "Today's Absentees" is a query not a table, what needs to be written instead?
View 3 RepliesReading Data From A Remote Database
Jan 22, 2012How to read data, submit queries from vb application to a remote machine running sql server. note: I have created a complete functional version of a stock control system with the database residing in the local machine. I just need the basic concept of interacting with remote databases that's all. Do we have to use sockets to read/send data ?
View 2 RepliesReading Data From Checklistbox Into A Sql Database?
Nov 1, 20101) i want to make my login page (which talks to a sql table called logins) my first page and it authenticates to that database and doesnt let you in until correct credentials are entered. ? not sure how
2) I have a Checklistbox that is populated with names - ( i want to be able to populate a database called members with those names(Firstname & Surname Only) and from a New members form populate the same members details into the members database this time including address email tel etc etc ....
3) create a delete button that will delete the information from the database and from the checklistbox1 (this is in case the member leaves the club).
4) how do you create trial versions keys etc ...
5) change a progressbar timer to last an 1½ and show hours minutes seconds but once the button is hit to stop the timer it automatically resets to zero.
Reading Data From A .mdb Access Database To A Form?
Oct 8, 2011I'm reading data from a .mdb access database to a form in my app. However the text is sometimes becoming scrambled as shown belowDatabase:Quote:The resistance of a 2.5mmonductor of length 8m and resistivity p = 1.72
View 6 RepliesHandle DBNull Exception While Reading Data From Database?
Mar 22, 2012I'm trying to handle DBNull exception while reading data from database. It's my code:
...
Dim SQLRDAs SqlDataReader
...
val1= GetStringFromDB(Trim(SQLRD("Name")))
val2= GetStringFromDB(Trim(SQLRD("Level")))
[Code]...
But still I get Conversion from type 'DBNull' to type 'String' is not valid. error.
Reading Data From MYSQL Database To Form - Table?
Oct 22, 2009I have login system and also I know how to get 1 exact row from mysql but how can I create a table which will be filled with values from mysql table?
[Code]...
VS 2008 - Perform The Database Operation Such Reading Data?
Mar 13, 2010how to perform the database operation such reading data and using them for comparison within the VB programming..
Please guide me with explanation as i have very little knowledge regarding the database operation...
i am using VB.Net 2008 as frontend...and MS SQL Server 2008 (express edition ) as back end...
VS 2010 Reading And Getting Data From Excel Sheet To Slq Database?
Mar 29, 2012I have some trouble with opening a excel sheet and getting some data out of it.
I want my program to have a button, when pressed, gives a "select excel file" popup and then load the data from some cells into my sql database.
So, when opening a excel file the program should get the data from cell D3 to D8 and put that into the sql database.
I now have the following, but that will only open the excel file.
Public Class Form1
Dim oConn As ADODB.Connection
Private Sub ConnectDB()
[Code]....
Continously Reading Data From A Modbus TCP Device And Store Data In A Textfile?
Mar 2, 2012I have a modbus TCP device that I have managed to connected to through my VB source code.
I want to poll (continueously read) data from certain registers of the device, and store the polled data in a file (text,csv, excel).
Data Binding - Update The Grid Data By Reading The Array
Apr 2, 2012Data binding should be an extremely simple thing to manage but I can't find a SIMPLE solution to the following problem.
I have two forms
Form1 contains a 4x4 MSFlexGrid (unfortunately an unmanaged COM object but I can merge cells, which I can't do with a managed Datagrid)
Form2 contains other controls which change the data in the Flexgrid.
I connect the two with a Public 4x4 array. Form2 changes the data in this array. I can update the grid data by reading the array. But how do I bind the Grid to the array so that it auto-updates - which is the whole point of binding isn't it?
Reading Data From A Socket (as Bytes) And Storing Data In A String?
Nov 29, 2009I am reading data from a socket (as bytes) and storing this data in a string. Then later i need to access specific bytes within the string and do some math with them. However the bytes that I read back from the string are not what I am expecting.
[Code]...
Insert, Delete, Update The Data Into Database And The Data From Database Will Be Display Using Datagrid?
Sep 17, 2010I got a system which i want to insert, delete, update the data into my database and the data from database will be display using datagrid. The below is the coding for one of my button, delete.
Private Sub btnDelete_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnDelete.Click
Try
btnSearchEmpNo.Enabled = False[code].....
Now I wanna set when user click on this button to delete a employee (for example) then the datagrid that i have in my application will not show the data of the deleted employee but in the background, the employee haven't been deleted from database.The employee only will be deleted from database when the user click on SAVE button.I know this application have to use RowState but how?
VS 2010 Remove Previous Data Of Database Then Insert New Data To Database From Textfile
Dec 14, 2011What I want to happen is that the button from my system will remove the previous data from database and then insert new data to database from text file. Im done with inserting new data. The thing is that I dont how to control or where to put the Delete Command from my code.
[Code]...
Reading And Writing To/from A Database?
Jun 16, 2010I have a table in a database with 3 columns: OfferName, ExperienceAward, and GoldAward
I populate a combobox with the various offer names with the code below:
Dim con As OleDbConnection = New OleDbConnection( _
"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=C:UsersDouglasDocumentsVisual Studio 2008ProjectsGameBoxRPGGameBoxRPGContacts.accdb;Persist Security Info=False")
Dim cmd As OleDbCommand = New _
[Code]....
Reading From A Database File?
Oct 2, 2009I have been trying to create a login page for a while and most of that time I have been searching for info on how to make it read the username, password and any other information off of a database.
I recently gave up and decided to use some code which reads it from a .txt file and this works and therefore I could complete the rest of the page and test it using the .txt file. However, a .txt file is not an ideal place to store the information as it is difficult to look at the text and find what you need to change if you want to upgrade the system to hold more data than before so therefore I came to this site to seek help on making the login page work with a database.
Writing To And Reading From A Database
Aug 24, 2009Im trying to get my program to fill out textboxes with information it reads from a database, and then save the changes to the database. Does anybody know any good tutorials of this which i could look into?
View 6 RepliesLoading Image While Reading From Database?
Feb 9, 2012I have a code wherein datagridview will load according to the query given.I have no problem with that but when i put a loading image while reading the database, loading image wont work as well as if i put only "Please Wait" to a label.I searched from google and said that backgroundworker sahould use to this problem. But how can i use the backgroundworker?i have no idea about it.
View 5 RepliesReading Csv File Into Access Database?
Feb 15, 2010I want to read a csv file into an access database , here is my code :
Private Sub load_csv()
Dim ConnectionString As String
ConnectionString = "Provider=Microsoft.ACE.OLEDB.12.0;" & _
[Code].....
The strange thing is that the file really is there, so what else could go wrong ?
Reading Database Configuration From INI File?
Jul 14, 2010How can in include registry file when compiling my program?
I want to include an .ini to give the users the ability to change the database path for example
[DBConnection]
DATADIRECTORY
p:data
[Code]....
how to program it, or is there a better way than using ini files?
I'm using visual studio 2008.
Reading Database Stored Online?
Aug 27, 2011im trying to read a database that is online. My goal is to be able to store a database online, and be able to edit it through my application and the web (the web part is done). all that remains is the application.
View 5 RepliesSaving DataSet Changes To Database After Reading Xml
Feb 23, 2012When I load data from xml to my dataset I want to apply this changes to database. This is my code, so far unsuccessful. [code]
View 6 RepliesVS 2008 Exception Reading Database?
Dec 23, 2009I have built everything for Beta one and I thought I had done very well until and Exception happens when I try and run it. Please could someone take a look at this and see if you know whats causing it:
Message: {"No value given for one or more required parameters."} Error -2147217904 Item: In order to evaluate an indexed property, the property must be qualified and the arguments must be explicitly supplied by the user. I don't know whether more info is required from the error but it happens on this line:
DReader = DSelectCommand.ExecuteReader
[Code]...
I have checked the database is in the target location and the table names and column names are all correct.
VS 2008 Reading From A Specific Row In A Database?
Mar 17, 2011in my program i have a list box full of rooms and when that rooms selected all its details are to be shown in a bunch of different labels. Problem is, no matter which room is selected the data readers only reading from the very first row in the database. I've got a variable to hold the name of wich rooms selected, but how would i use that variable to determine where the rest of the data should be read from.
heres the code that im using
Private Sub lbRoomLoc_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles lbRoomLoc.SelectedIndexChanged
[code]....
VS 2008 Reading/Writing Database?
Mar 16, 2010I'm currently doing a project, I have 5 text boxes, and the information I put inside them get's added to a record in my database..In this record, an auto-number is allocated, and I need to display what the auto-number allocated is..
View 7 RepliesReading DVD Data In .NET?
Mar 26, 2012I've been asked to prepare a proposal for a client for a new development. The finished product will require copying of personal DVDs, e.g. a wedding or christening video, to AVI or similar format.
Is it possible in vb.NET to read data from a DVD and encode it as an AVI file? If so, can you give me some pointers to how I might research this more.
ExecuteReader Not Reading Access Database In Order
May 20, 2010I have a program using the OleDbCommand to read an indexed Access database. [code]I notice that when step debugging the program, the file is not being read in correct order.Example: it will read the record with "B" in the D01 field before a record with "A" in the same field.The record with "B" is the second record in the database.I do note that all records in the database are read before exiting the loop, just not in any apparent order.
View 5 RepliesProgressBar - Getting UI Thread To Update While Reading Database
Aug 8, 2011I'm having trouble getting a progress bar to update. I'd be okay just with a moving marquee bar. Basically, I'm reading a database routine in a SqliteReader.vb class. I need to use the worker_DoWork routine, but I'm not sure how to expose my variables coming from Form1: graphData, graphComputations, m_debug to the worker_DoWork sub. How is this usually done? [Code]
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