DB/Reporting :: Connecting To Dbase IV Database Files That Use Indexes

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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DB/Reporting - Updating DBASE IV Databases In .NET

Sep 7, 2010

I am attempting to modify DBaseIV files using ADO in .NET I am able to open and read the data with no problem but everything is showing as read only and there is no way (at least that I can find) to perform Updates/Inserts/Deletes to the underlying Database table.

There seems to be almost no documentation that I have been able to find dealing with DBASE files. I have found a few references that BDE (Bordland Database Engine) needs to be installed and used for changing DBASE database files. However, it appears that BDE must be purchased. I found one reference that indicated ADO Jet 3.5 would work but 4.0 would not. Then I found another that said 4.0 had been updated to include Update/Insert/delete SQL interfaces.

Can anyone point me in the right direction for being able to modify a DBASE IV database table using ADO (or some other method within .NET) It is currently not possible to change from DBASE to another database structure this may be coming in the next year or so but will still need to perform modification to DBASE files for the forseable future.

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DB/Reporting :: Connecting To An Access Database?

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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DB/Reporting :: Connecting To Mysql Database?

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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DB/Reporting :: Connecting An SQL Server Database With VB Express?

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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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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DB/Reporting :: Connecting To MySQL Database Online

Jan 6, 2011

I have a MySQL database online. What do I need to connect to it and exchange data?

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DB/Reporting :: Error Connecting To Online Database Mysql After Fresh Installing

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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Connectionstring To Connect With A Virtual Dbase 7 Database?

Jun 1, 2009

Does anyone knows witch connectionstring you need to connect with a virtual Dbase 7 database ?

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DB/Reporting :: Accessing Multiple Database Files With One GUI Program?

Jul 20, 2008

how would I go about making the user access different local SQL databases. As in they use a GUI program to access / read / write data in a database but can also use that same GUI program to do the same to multiple database files.Is that sort of setup easy to integrate into a VB program? or does a VB program by nature only try to access one database? To integrate the open and close dialogs into a VB GUI in terms of different database files, is there much involved?

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DB/Reporting :: Connecting To MySQL Version 5?

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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DB/Reporting :: SQL Connection/ Connecting From VB 2008 App

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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DB/Reporting :: Connecting A VB Front End With A MySQL Back End

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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DB/Reporting :: Connecting To Excel - Null Values?

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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DB/Reporting :: Error ODBC Connecting To ACCESS On Win 7 64bit

Mar 3, 2011

i've developed a VB Net Application, that works with an access (2003) db. Now i've send it to a friend on mine with a new pc 64bit with win 7, and it doesn't works, more or less the error is: Quote:

[Code]...

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DB/Reporting :: Database - Access Denied To A Text File (since It's Stored In The Program Directory In The Program Files)

Sep 20, 2010

I have a program where a lot of the required information for it is stored in text files. I simply read this information into large arrays. However, I don't think it's necessary to load all the information each time. Rather, it would be more efficient if I could simply search through a list of items to find the one I need and then use the data from it, or to find a similar name and use it elsewhere.

Would I be right in using a database? And is database programming done in SQL? I have a book on it telling me to use the SQL Server (IIRC), so I shouldn't be doing it in the VB.NET Express GUI?

Here's an example of what I would do:

Hex = 03 00 => dex number 003
Search in file Pokemon Dex Numbers
003 returns Bulbasaur
Check Bulbasaur base stats in the base stats file
etc

So basically I'm reusing a lot of information. I think a database would be best and it would all be internal right? I'm getting complaints about access denied to a text file (since it's stored in the program directory in the program files).

So to cap up the few questions I have:

-Databases are done in SQL and not inside the GUI?
-Databases would load internally?
-I could search a database without having to load it into like an array or something?

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Connecting A LinkLabel To Files In MsAccess?

Oct 12, 2011

1) choose a chemical from the combobox

2) click on search button - all details of chemical appear in respective places

3) next, i would require a link label to be clicked on to bring me to the specified chemical file because each chemical has its own special file

Its like each time I search for chemical A, the link label will show chemical A's file upon clicking it.and if I were to search another chemical, chemical B,the link label will show chemical B's file upon clicking it. Problem: i'm figuring out how to connect my linklabel to open the specified chemical's file link which is stored in ms access.In my access table, I have a table with two columns;

1st column: All chemical Names

2nd Column: Contains all the links to the chemical files that i want to open in the task above.Code I have done so far which is left hanging coz, I don't know how to modify it,

Public Function linktoMSDS(ByVal Link_To_MSDS As String)
Dim strSql As String
Dim dstemp As New DataSet

[code]....

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Reading DBase DBF With Non-English Characters

Mar 15, 2011

I have a tool which reads dBase files and uploads the contents to SQL Server, part of a system to import shapefiles. It works but now we have a requirement to import files that include non-English characters (Norwegian in this case, could be other languages later) and they're being corrupted. The dBase files are being read using an OleDbDataAdapter. Stepping through the code I can see that the text is wrong as it is read in. I'm assuming it's something to do with code pages or Unicode but I have no idea how to fix it.A dBase Reader application tells me the DBFs are in code page 1252 - I don't know if this is correct. My upload tool runs on Win7 with English (UK) regional settings.[code]Is there a way to tell OleDbDataAdapter what code page to use or a better way to read dBase files from VB.Net?

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Reading DBase DBF With Non-English Characters?

Oct 4, 2010

reading dBase DBF with non-English characters

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Combobox The Field Names From A Dbase File?

Jan 31, 2011

i want to input into my combobox the field names from a dbase file. this is the code i have so far:

Dim table As DataTable
Dim restrictions() As String = {Nothing, Nothing, Nothing, "COLUMN"}
Using connection As New OleDb.OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data

[code]....

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VB 2008 Express Edition & MySQL Dbase Connection?

Jun 12, 2011

What driver do you need to connect vb.net to MySQL?How do I create a Data source to MySQL? am only getting the options for SQL and MS-database! am designing a reg system for a college

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Asp.net Connecting To A Sql Database

Feb 14, 2011

I'm trying to write a method in VB.net so that when I click a button it queries the database and returns all the values which match a textbox which is located next to the button. I have no idea how to do this, I assume in the onclick method for the button I will need to pull in the value from the textbox, connect to the database and display the results to a gridview?

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C# - Connecting To DataBase ASP.NET

Jun 22, 2010

I have a database in the same workspace, I've tried to connect to this DB using this codes :

[Code]...

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Connecting To A .mdf Database?

Jun 5, 2011

I got vb.net 2008 express and sql server 2005 and 2008 express editions whic I downloaded from microsoft website.Now I just want to connect vb.net with sql server 20o5 or 2008.I am using a connection string as

PubConnstring = "Data Source=RAMANSQLEXPRESS;Database=FirmTest11;Trusted_Connection=Yes"
'Create your connection object
Dim objconnection As ADODB.Connection
Dim strSQL As String

[code]....

Getting Error : [Microsoft][ODBC Driver Manager] Data source name not found and no default driver specified.

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Connecting To A Database?

Apr 14, 2011

I'm having problems connecting to a database. I have sql server 2005 express installed on my PC, and i am using the following to code to connect to it.

Dim nwindConn As SqlConnection = New SqlConnection("Data Source=localhostSQLExpress;Initial Catalog=northwnd;" & _
"Integrated Security=SSPI")

[code].....

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Connecting To A SQL Database?

Jun 2, 2010

Ok I'm finally getting to put on big boy pants and have now moved beyond doing everything in Access (yay me).o here is the problem, can't connect to the Server. created a test button on my form, which is what I usually do with Access so Ican be sure everything is where it needs to be pointing.

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim connetionString As String

[code]....

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Connecting To A Web Database?

Sep 21, 2010

is it possible to connect to a database residing on a website (eg., MS Access)to get/update data.can we do it by a VB.net windows application.

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Connecting To Database In .NET?

Mar 25, 2011

Dim con As New System.Data.SqlClient.SqlConnection
con.ConnectionString = "Server=iraq\sqlexpress ; Database=stats ; Trusted_Connection=True ;"
Dim com As New System.Data.SqlClient.SqlCommand
com.CommandText = "insert into users values('" & TextBox1.Text & "','" & TextBox2.Text & "','" & TextBox3.Text & "')"

[Code]...

There are new events happen when i adjust the connection string

con.ConnectionString = "Data Source=.SQLEXPRESS;AttachDbFilename=C:Documents and SettingsAdministratorMy DocumentsVisual Studio 2005WebSitesWebSite2App_Datastats.mdf;Integrated Security=True;User Instance=True"

show me error with com.ExecuteNonQuery()

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Connecting To SQL Database

Feb 8, 2012

I am a wannabe programmer but quite new, started with VB.net about 1 month ago.I write on this forum because It's the first time that I'm actually stuck. The problem is I cannot find a way to connect to SQL server database I have created and saved earlier on my HD using visual express 2010. I want to find a way to connect using code, not by click and drop. I just hope you won't find my issue too trivial to even answer it.The project is very simple, it just consists of a button that should connect to the db on click.[code]

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Asp.net - Connecting To Oracle Database

Apr 7, 2011

Today is my first day trying to use Oracle databases in Asp.NET so I have no idea of what I need to do. I have added this code

[Code]....

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