I get an error using the connection string (url...) to connect to my SQL CE saying that "Provider 'Microsoft.SqlServerCe. Client.3.5' is not registered in the local PC.".In my project I have a table connected (with the wizard) to the same database and it works fine, but when i try to connect with my own code it FAIL. [code]
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I have filled a DataSet from a SQL Server table and I have also set up synchronisation with a local copy (for offline use). The local copy is saved to a SQL Compact Editon database file.
1. Create the connection string to the SQLCE DB
2. Execute a stored procedure (a copy resides in the DataSet) against the SQLCE database
I've been getting this error when I try and use my model container:
No connection string named 'PFModelContainer' could be found in the application config file.
I have my edmx file in a separate project. I checked the app.config file and my model was there, and I also put it in my main project app.config file. Still doesn't work. Here's the connection string:
<connectionStrings>
<add name="PFModelContainer"
connectionString="metadata=res://*/PFModel.csdl|res:
[Code].....
Code:
Dim cn As New ADODB.Connection()
cn.ConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=D:BackupEon of LightEon Of Light.mdb"
[code]....
' This code not Working :('Error Messege in md.Save()
I've been messing around trying to get an INSERT statement to work, and because of this, it has created lots of records in my database that I dont need or want.
The problem is, when I open up the table by right clicking on it in the database explorer and selecting "Show table data", I click on the record I want to delete and the following error comes up in a message box[code]...
i have an application. which is executed after every 5 mins. i have an open connection but it gives me the following error:
ExecuteScalar requires an open and available Connection. The connection's current state is closed.
my code is something like this. I have shown where all i am using ExceuteScalar()
Sub Main()
Try
connection.open()
cmd.ExecuteScalar()
[code]....
I have a simple scraper. It works on some websites, but on some there is this Error:
Quote:
IOException was unhandled Unable to read data from the transport connection: The connection was closed
It is occuring at "Dim htmlresults As String = Urlcontents.ReadToEnd()".
'Create the HttpWebRequest object
Dim req As HttpWebRequest = WebRequest.Create(URL)
'Set the timeout to 1 second (or 1,000 milliseconds)
req.Timeout = 10000
[code]....
i know this question was asked a couple of years ago by TheMinistered .. but i cannot find an answer, and i have exaclty the same problem (using both VB6 and VB.net 2003) :
When I attempt to connect to a remote SQL server via ADO it takes almost 20-30 seconds before Open returns. I don't know if it's something I'm doing wrong... here is my connection string/code:
Private Sub Class_Initialize()
Dim strConnectionString As String
Set m_objConnection = New Connection
[Code]......
I have been struggling with the construction of an Access connection string. Here's the problem.My Visual Basic 2008 project is located in a disk partition on my hard drive that I have named S:. My Access MDB file is in the same location.When I deploy the application it obviously will not be in an S: drive on the user's machine. My concern is that if I construct the Connection String using the file designations on my computer as:
(Provider =Microsoft.Jet.OLEDB.4.0; Data Source =S:MyApplicationmydatabase.mdb; User Id =admin; Password =
The deployed application won't know where to look for the data file. I know there are some shortcuts that will allow me to construct the connection string, but I do not know either the designated names or where to find them.
I have created a very simple Visual Studio .net 2002 VB# program. It consists of form1 containing a DataGrid bound to an Access 2007 Database using OleDbConnection1, OleDbDataAdapter1 and DataSet11.The location address of the Database will change based on the user so, I need to make the connection string variable. Problem is inserting the following string variable "source=" & strFileLocation & ";" creates a fatal error
View 1 RepliesI have a little problem with checking if a sql connection is good.
Attached here i have a simple vb.net program that should check if the sql connection to the sql server is good. If i just run it once it works very well. But if i use it in a timer and check the connection to the sql server every 10sec it will only tell me that the connection is good (V=0).
I have tested the code with turning of the sql server service.
Dim connect As String = "Server=192.168.1.2;Database=Test;User ID=sa;Password=12345;Trusted_Connection=False"
Dim sqlconnection As New System.Data.SqlClient.SqlConnection(connect)
[Code].....
I have a problem with the connection to my database. It's on a remote server, and this is my code:
[Code]....
I'm connecting a MS-SQL remotely with VB2008 Express.I defined two different methods - the first one is copied from my old VB6 application, which is working perfectly.In this application, the retrieved data is added to a listview control, not datagrid!
Code:
Dim myconn As ADODB.Connection
Dim MyRecSet As ADODB.Recordset
myconn = New ADODB.Connection
[code]....
The SQL query contain several table, thus I used a "*" instead for the table name- not sure this is correct?
Code:
da.Fill(ds,"*")
In our application we use IDataReader which actually call function from one.dll where weExecureDataReader()
We have many calls in application and in some places For some reason I am getting error message "DataReader already open" but I am not sure where.What will happend if I simple close that conection in the that .dll? Am I going to make trouble to database because one datareader left opened? I assume closing connection will close reader too and gargage collector will manage that left opened datareader..
I am trying to use RAP (rabid application development). So I have created a database with a datagridview to show all information and textboxes to modify the informations. So far so good.
The problem is created when I try to use the search facility on the datagridview. The search is working but the problem is that the textboxes are not following the search criteria . I can configure this manual but I would like to know which is the easier way to configure the textboxes to show the value of my search criteria.
I also want to know how when I finished with the search criteria and empty the search the text boxes to make the connections back as they were before.
I have just written an application for myself and a few other users to use .rdp to connect to a number of servers, by clicking on the appropriate button. In the full version of the program I have two sets of connections one for when we are inside our vpn, which uses local ip addresses and DNS names; and the other which uses the external IP addresses and DNS names.This works quite well; if the user has stored credentials on their pc for the connection they connect straightaway; and if they don't the .rdp dialogue opens up with the server name/address filled in, ready for them to edit the rest of the required information.The problem for me is that this means I have to code 43 different Private Subs and then link the buttons; and I was hoping that instead of individually coding each connection, I could get the users to:Select by an option button whether the connection was internal or external
View 3 RepliesSQL connections confuse me sometimes In almost every SQL related code on the internet the routine is like this;
* Open connection
* Execute SQL command
* Close connection
Is it good practice to just open a connection when the application starts and use that connection until the application closes?I know that sequential connections are required when processing more queries, but what if I need to poll a certain Table every x seconds? Isn't is better to keep that single connection open for as long as the application is running (and re-open when a failure occurs) instead of opening a new connection every x seconds?
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?
I am new to Visual basic and am using visual basic 2008 to write programs in, I have setup a database connection and the connection string is currently stored in the settings section of the project.I would like to have a menu item where when the user selects "test database connection" it will run the sub for testing if the database is established.
View 2 RepliesI have an SQl Connection: Con
con.close
after I close the connection I cannot copy the Sql Express Db because it is still in use but I have CLOSED the connection.
I have a connection string in my app.config:
Code:
connectionString="data source=.sql2008 ;Database=Database1; Integrated Security=FALSE; Persist Security Info=True;" />
How do I change to another database (one of many) without using multiple strings? Can I change while the connection is open?
Code:
Dim myConn As New SqlConnection(System.Configuration.ConfigurationManager.AppSettings("ConnectionString"))
Connection between program and an remote SQL server. most of the hits were on VB6 and as you might see in the title I use VB.NET 2008, so let's begin:
[Code]...
I have been given the task of debugging someone else's program. It previously ran flawlessly on a 32-bit Windows XP system, but now we are steadily switching over to 64-bit systems and this program has "spit the bit" so to speak.
This is App.Config.xml
Code:
<configuration>
<appSettings>
[Code] .....
The problem is I don't know my alternatives are. System.Configuration.ConfigurationMananger.AppSettings doesn't work.
I've tracked the problem to the last line Con.Open().
Code:
Public Function get_quotes(ByVal strDBConnection As String) As DataSet
Dim con As SqlConnection = New SqlConnection(strDBConnection)
Dim strQuery As String = "SELECT qmpQuoteID FROM Quotes"
Dim da As New SqlDataAdapter(strQuery, con)
Dim dsQuotes As New DataSet("quotes")
Try
con.Open()
The error is "The ConnectionString property has not been initialized."
I need my program to connect to a database within my application i.e.What I have:
m_cnADONetConnection.ConnectionString = "Provider=Microsoft.jet.OLEDB.4.0;Data Source = C:Documents and SettingsmeroneyfMy DocumentsVisual Studio 2008ProjectsAsset Manager 2008inDebugDatabaseAssetManager.mdb"
What I need is: m_cnADONetConnection.ConnectionString = "Provider=Microsoft.jet.OLEDB.4.0;Data Source = DatabaseAssetManager.mdb"
I have used:System.Windows.Forms.Application.StartupPath & "ImagesSystemDefaultImage.bmp"
for loading of images within the default directory. but this returns the app path but also includes "System.Windows.Forms.Application.StartupPath" in the string?
Hoping for some advice, probably an easy question for most people on here but I'm a mere learner. Basically, what would generally be the reason for using a Data Set via adapter rather than just connecting to the database directly using an SQL connection?
View 2 Replies"Timeout expired. The timeout period elapsed prior to obtaining a connection from the pool.his may have occured because all pooled connections were in use and max pool size was reached."I am googling and find out the answer to it is increase my connection pool size from to 100 or so.
View 4 RepliesIf I use the CmdObj.ExecuteNonQuery() I got an error
I'm not having an open connectoin.
This will happen at random, and I can always just catch the error and re-establish connection to the server, but I am confused as to why. When doing lots of inserting into the sql server, I only establish one connection that is public, instead of many little connections. I had my doubts on a public sql connection, but it's been running great, and I've seen no problems until this morning. Again, this random moment I hit an error that stated, sql connection state is broken. Is it bad practice to just accept this error, and when it happens, re-establish the connection?
View 7 Replies1.Establishing a connection to a database(preferably one that is inherit within the project and can travel with it)
2. Setting the correct references to the database ( I tried connecting via JET with windows 7 and I get an error that I cannot use JET)
3. Query the database (Access) with SQL, and return those results to a recordset.
4. Loop through the recordset.
5. close the database connection
6. Open recordset and write data to table.
[Code]...
I have finished my program and now i am ready to deploy it. The only problem is it is a multi-user application. All i want to do is simply run the program with the database from a server, and have other local computers with the program access this same database. I know that you have to change the connection strings for the local computers, but how can i go along doing this?
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