DB/Reporting :: Connecting And Pulling Data From MS SQL Database?
Jul 21, 2009
I was wondering which way would be the easiest in VS2005 to connect to and pull data from a MS SQL database. I have already setup the database connection by choosing the datasource for a DataGridView but I'm not able to retreive any information.
The steps I have taken so far:
1. Make new form
2. Drag and drop DataGridView onto the form
3. Setup the data source and respective username password
Not sure where to go from here....
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Aug 27, 2009
I'm trying to query an access database, but my query results only display the first cell of the query results.
For example, if I select 3 columns, 5 rows, only Column 1 Row 1 is displayed. Someone mentioned something about EOF but I can't find EOF code for OleDB. Should I be using another type of connection?;
Code:
Private Sub btnGetReport_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnGetReport.Click
Dim StartDate, EndDate As Date
[Code]....
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Apr 24, 2011
I can connect/login to my database, view a formatted table in the current window, however I want to click a button and see a new table set in a new window. Theoretically I should be still logged in/connection information saved but however I get 'unable to connect to database'.
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Apr 14, 2009
I'm at an absolute loss here, I've read so many different things.I just want to add new records to a database I created using SQL Server 2008 with SQL statements in Visual Basic Express 2008. But I can't even connect/get it to recognise the database I created.The database name is 'database.mdf' and is situated in the MSSQL/DATA folder. So far I've read I need to use this code;
Code:
Conn.ConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data source=database.mdf"
Conn.Open()
[code]....
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Jan 6, 2011
I have a MySQL database online. What do I need to connect to it and exchange data?
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Jan 5, 2009
I've used visual basic in office before, but when it comes to writing applications in Visual Studio, my knowledge is fairly limited. I'm unsure on how to set up a connection in my application to connect with a dBase IV database that uses indexes (not sure if it matters if it has indexes or not). I will need to both read and write to this database.
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Jul 21, 2009
database name = DataTable
Pulling data from Access database in .net?
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Apr 14, 2011
Im trying to pull 2 bits of information form the access db.
My db sting is:
Shared Function GetLastPost(ByVal forum As String) As String
Dim MyResult As String
Dim con As New OleDbConnection("Provider=Microsoft.ACE.OLEDB.12.0;Data Source=C:Documents and SettingsperkinjMy DocumentsVisual Studio 2010WebSites
[code]....
but i want to get 4 bits of info from my db
Auther
lasttime
ID
numrep
and im not sure how to display this within my page_load
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Nov 18, 2009
I have a problem here I did make database program for a friend the database is online Mysql I use Visual Studio and put this into setup.exe when he install the program and try to log on he get this error This is my connection to the database
[Code]...
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Jan 15, 2012
I generate a print preview, the only thing is, if there is enough data to fill like 2-3 pages I don't know how to generate a new page. It only fills the first page and that's it....
Private Doc As New PrintDocument()
Private Sub btnPrint_Click(sender As System.Object, e As System.EventArgs) Handles btnPrint.Click[code].....
most of the code it's just pulling data from database and printing necessary charges to the invoice, but if the invoice is more than 1 page then I don't know what to do because it only generates 1 page.
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Sep 20, 2010
I am using a stored procedure to fill a dataset with a large amount of data (47k rows and 8 columns). I am needing to fill two tables with the results of this stored proc.One table will have data representing 47k reps that currently have credit for a transaction. The other table will be a mirror copy of the 1st table with 47k reps that were supposed to get credit for a transaction. This application is going to take credit from one rep. and give the credit to the other rep record in the 2 mirrored datasets. It's taking 30 seconds for the data adapter fill method to return records to my application. I would like to reduce the amount of time it takes for this request to process.
Here's the contents of the stored proc:
Code:
ALTER PROCEDURE [spGetSalesCode]
@Period varchar(15)
[code]....
how I can better return a relatively large dataset to vb.net more quickly?
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Jun 21, 2010
I am trying to connect the database that is sql server 2005 to the vb.net code so that I can add the data to my database, which is already in the sql server and retrieve the required data from the database.
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Jan 5, 2011
I just created some program, using an online database. You can login, register...But the problem is: everything works but how do I fetch data from the user's sql table?I include the project (all connections) over here ->>DOWNLOAD<<-. I use freedb.net....
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Jun 12, 2010
I just created some program, using an online database.You can login, register...But the problem is: everything works but how do I fetch data from the user's sql table?
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Oct 9, 2010
How do I connect to a mysql database, and write a new column to a certain table there?
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Oct 11, 2010
need to get the data from Cell(2) on my gridview but cant figure it out. id like to put it in a varible im using VB 2010 express ed. what im aiming for is to show a popup box showing of my note and to show the date. by compairing in a loop of all entries if the date is falls on the date that was picked on the entry.
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Dec 29, 2008
How to direct put (without someone key in) the data into the database with VB? The data will automatically generated by the program..
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Jul 30, 2009
How to i insert Variable @ClassID(If Identity Propeties) @LecturerID , @StudentID and a Date from Calendar Control into the Date Collumn , into a Database Called Fingerprint, TableName= Attendance.
The Collumn Are ClassID, LecturerID, StudentID, Date.
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Dec 24, 2008
I have an Access database with a table called Events.I created a new VB.net 2008 project and created a MicrosoftReportViewer control. I also added a "Report" component (which created a .rdlc file).I am easily able to drag things from my Access database I added to the data sources onto the report. However, one part of the report I would like to add data to a Matrix that I calculated with VB (ie it is not in the database). The database has a list of names and a bunch of times associated with each name. and then I calculate some fancy stuff based on those times. I would like the matrix to be a list of names (from the database) on the rows, a list of dates (which I specify in the code) on the columns, and the data of the matrix I also calculate.
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Mar 4, 2010
I would like to return the data in a database query as an array, but the problem is, Im having trouble working out how to do it, here is how I would like the data to be returned:
array (
---> 1
---> ---> 1
---> ---> ---> fieldname
[code]....
I could create a multi dimentional array, but the results could range from 2 rows, to 2000 rows, I looked into redim, but you can only redim the last dimention, I would need to the first and second, but not the last.
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Feb 25, 2008
Ive got a web page so that the users select a day from the calendar and the date is input to a text box, the format is dd/mm/yyyy, it is the same format in the database table.
I want to select the data from the database when it is = the date in the text box but it is retrieving data in mm/dd/yyyy format. My sql is:
SELECT Booking.Date, Booking.RoomNo, Booking.Lesson, [NoComps] - " & students & " AS diff FROM Rooms INNER JOIN Booking ON Rooms.RoomNo = Booking.RoomNo WHERE booking.Date= #" & txtdate.Text & "# AND booking.Lesson = '" & lessonlist.SelectedValue & "' AND booking.Type IS NULL
how can i make sure it retrieves the data using the correct date format?
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Aug 18, 2009
I'm working on a VB.Net Windows form that is supposed to manipulate an Access Database. I can Already read data from the database (placing them in a combobox) using the following:
Code:
Private Sub Form2a_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
OpenFileDialog1.FileName = ""
OpenFileDialog1.Title = "C# Corner Open File Dialog"
[code]....
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Feb 24, 2008
i am getting this error:
Code:
[Microsoft][ODBC Driver Manager] Data source name not found and no default driver specified
When trying to connect to my database using the mySQL v5 drivers. I had the version 3.xx working fine until i installed the newer 5.0 drivers....
Code:
conn = New ADODB.Connection
With conn
.CursorLocation = ADODB.CursorLocationEnum.adUseServer
[code]....
But i can not seem to find the "correct" connection string for use with version 5..
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Aug 24, 2011
We have developed a VB 2008 app that uses SQL Server 2005 Express to store data collected by this app. This app has been designed to allow multiple connections to the one centralized database.
I have ran a few tests, and confirmed that if one computer running our app is accessing a database residing on a different computer,and the network connection between two computers has been severed, it would take approximately 3.5 minutes before I would get a connection timed out exception error from within my code.
I have deliberately set the ConnectTimeout property in the SQL connection string to be 15 seconds. But some how, SQL database engine still retries until approx. 3.5 minutes later.
My thinking is that I have a subroutine that would attempt to open a database once a minute.If the open attempt is not successful, and resulted in an exception, then I would popup a message to notify the user that the connection is not available.
Doing it this way, I have confirmed that it would take about 1.5 minutes for it to re-establish the connection, once the actual network connection has been restored.
To make the long story short, I would like to find a way to shorten the detection for a broken connection, and let the user know sooner, rather than locking up the app during the 3.5 minutes period has elapsed, and at the mercy of the SQL database engine to timeout. And why would it take 3.5 minutes to timeout the connection attempt when I had explicitly use 15 seconds in my connection string?
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Apr 23, 2008
I am using Visual studio 2008 to build a web application. What I am trying to do is retrieve data from a database and populate text boxes based on the results.
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Jul 4, 2008
I need to extract specific data from a database. With starting point in this data, I will collect information on the internet. After the information is collected I need to check if this information is already stored in the database, and if not, then add it. This action is being repeated about 500-50000 times each time the procedure is being executed. (not often)
The approach I'm taking seemes sleazy and ineffecient and I was hoping you could point out some places where I might be able to optimize it. I've two open connections at the same time. The first I use to extract data, and it stays open throughout the whole session. The second connection is being used first to check if an entry already exist and if not, to add the data.
The reason I am using two connections is due to the fact that I got a reader bound to the first one, so it is rendered unavailable.
I was thinking that maybe checking if the data existed, and adding it if not, maybe could be contracted into one command execution instead of two. I don't know if it would be possible to do this with one connection only as well, as it seemes more proper.
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Jul 25, 2009
I recently made a database that saves user information into a MS Access database from a form.
Code:
Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnSave.Click
objDA = New OleDbDataAdapter("SELECT * FROM CDetails",
[Code]....
Now when they go to the next form, I have labels such as lblFirstName, lblSurName ect. I want to display the information that the user has inputted into these labels. How can I fetch data saved into the database and display it onto these labels? and how can I select rows?
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Dec 12, 2008
i am trying to update database with updated data in data adapter. here is error message. "Update requires a valid UpdateCommand when passed DataRow collection with modified rows." here is my code.i get this error when i try to update dataadapter with following line.
[Code]...
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Mar 27, 2012
how to connect a visual basic front end with a MySQL back end. I am not proficient in VB or MySQL and was not able to find anything on google as a result.
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Oct 22, 2008
I created a connection string for an excel file. I prefer this method as opposed to creating "Excel" objects since it is not restricted to a specific version of Excel.When I connect to the excel file, I step past the first few rows since they have data that is not needed. When I reach the first field that contains a date, then I begin my data import. However, at that point (A8), it shows the cell in the "A" column as having a Null value even though there is indeed a value in the cell. Columns "B" and "C" are fine.
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