Using SqlCommand Object In - One Open Connection In One Procedure
Nov 5, 2009Can I use two command object with one open connection in one procedure at VB.NET?
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VS 2008 Required A Procedure To Open Connection?
Feb 9, 2010so as to open an MySQL connection how can i have a procedure to open a connection to an MySQL server duly passing my connection variable name in to my procedure as a parameter like some thing the fallowing one is not opening the connection
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SqlCommand Calling A SQL Server Stored Procedure Times Out?
Jun 14, 2012I've got a conversion utility that basically copies values from one table to another. It's worked great for a while, but I've run into a strange issue with one customer. They got through 1.5 million records with the utility but now it is completely halted.When calling a stored procedure from VB.Net, it just hangs until the SqlCommand times out.Calling the same sproc from Management Studio executes instantly. My VB.Net code for the SqlCommand is below (insertConn is defined and opened earlier, dr is a SqlDataReader that has been populated in a previous step from completely different SqlConnection and SqlCommand instances):
Dim conn As New SqlConnection("connection string here")
Dim insertConn As New SqlConnection("connection string here")
Dim dr As SqlDataReader = Nothing
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VS 2010 Passing Parameter To Stored Procedure With SqlCommand?
May 2, 2012VB Imports System.Data.SqlClient Public Class frmMain
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I have three ways of adding parameters to my query commented out above. The all seem to return 1781 records (which is all of the records) and will not filter out to what the UserName variable equals which should reduce it to 32 rows.
I use a Console.WriteLine to show that the UserName is indeed my username. But it seems to not be getting passed to the query properly. I tested the Stored Procedure before even starting in on the program, so I know it functions properly. I just don't know what I'm missing from a VB.NET perspective to get the same results into my DataTable.
Are Object SqlConnection And SQLCommand Disposed
May 20, 2010[code]in this code, do the objects con and cmd get disposed because the return statement is placed before the end using statement.
View 1 RepliesError - ExecuteScalar Requires An Open And Available Connection - The Connection's Current State Is Closed
Aug 3, 2011i 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()
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ExecuteNonQuery Requires An Open And Available Connection, The Connection Current Stat Is Close?
Nov 30, 2008i make a class and when i call on form then that error occurs "ExecuteNonQuery requires an open and available connection, the connection Current stat is close "
Class Code isImports System.Data.SqlClientImports System.DataImports System.StringPublic Class DatabaseKits Dim Cn As New SqlClient.SqlConnection Public Function BuildConnection() As Boolean Try Cn.ConnectionString = "Persist Security Info=False;Integrated Security=True;Trusted_Connection=Yes;database=BizAimsPro2008;server=Server-2k3s" BuildConnection =
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.net - Connection Was Not Closed Connection's Current State Is Open?
Dec 19, 2011Try If functionmode = "ADD" Then
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Connection Was Not Closed Connection's Current State Is Open?
Jul 5, 2011I got this error..The connection was not closed. The connection's current state is open.
This is coding to add data in Ms access in vb...
Imports System.Data.OleDb Public Class Form1
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Establish A Connection When The App Is Launched And Keep The Connection Open Until The App Is Closed?
May 20, 2010I'm developing a device app in VB.net that will access a SQL Server database. I need to establish a connection when the app is launched, and keep the connection open until the app is closed. I've done the following:In the Master Module:
Public CNN
As SqlConnection
In the Main menu form load:
CNN =
New SqlConnection(sqlConnString)
CNN.Open()
Then when I want to read from the database:
Dim sqlDR
As SqlDataReader
SQL = "SELECT Name FROM Table"
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When I run the same code without the global CNN, but rather dim the connection inside the Select function, all works well.
The Connection Was Not Closed. The Connection's Current State Is Open
Mar 11, 2010I'm trying to insert a new records into database, one of those records is a "datetime"...when I type a wrong date, and try to insert those values into database, i get an error (about wrong typed date etc.)...ok, that's fine, things need to work that way. But here comes the problem, I correct the date, and then try to insert values again...here I get an error from the post title. And this doesn't work until I close that form and run it again...here's part of my code:
Dim cvLicence As New SQL
Try
cvLicence.upis("INSERT INTO blabla (itsnotimportant) VALUES ('something')")
MsgBox("everything's fine", MsgBoxStyle.Information)
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The Connection Was Not Closed..The Connection's Current State Is Open?
Jun 12, 2011Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click
exitwithout()
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VS 2008 Open And Close Connection Every Second, Or Keep It Open All The Time??
Oct 21, 2009In my program, I have a timer with a inteval set to 1000ms. The timer is executing a MySQL-command, and right now I'm opening and closing the connection each time.
View 5 RepliesProcedure Holding Connection String?
Jun 10, 2011My problem is when I change computers, I have to change the drive letter the jump drive is located. Currently, I have the following code and have to comment out the connection to the letter drives I do not need to use.
' Dim con As OleDbConnection = New OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0; Data Source=E:Grad ProjectProject.mdb;")
' Dim con As OleDbConnection = New OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0; Data
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VS 2008 Calling A Stored Procedure In .NET For Connection String?
Oct 26, 2010I have been creating some asp.net sites that connect to an AS400 for data and I use a SQLDataSource for this with the following connection string (changed for security reasons). Now I need to create a winform application in VB.NET and am wondering how I would do this? I have only used MSSQL in winforms and use the sqldatareader for Select statements and execute non-query for others. I need to call some stored procedures on the AS400 passing parameters. I was hoping to do this by code like I do with MSSQL rather than drop in controls to bind to.
Provider=IBMDASQL.DataSource.1;Data Source=192.168.100.2;Password=xxxxx;User ID=xxxxx;Initial Catalog=S12345;Default Collection=AABBCC
SQL Connection .net - One Sql Connection Object For The Application?
Jan 27, 2012SQL connection - I planned to create one sql connection object inside my own singleton class (say connectionmanager with Reference counting for 'SQL connection object' which is a member of the class) and open/close the connection whenever needed. As I like to give high importance for performance. And my application is a desktop based application accessing a remote database server (SQL server 2008), and will use only one connection string, 50 concurrent desktop users may access db server. Please advice.
As like many articles say if the answer is "Connection pooling is taken care by ado.net" - Does that mean that scope of connection pool is entire life of Application instance? Or is it in the scope of SQLConnection object?
Binding A Stored Procedure To An Object?
Feb 23, 2009I am able to get a sql statement to an object. However when attempt to do the same type of code for the stored procedure it does not work.
Public Function ListDMR() As DMRList
Me.Connection()
Dim objALLDMRlist As New DMRList
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Passing An Object (Text Box) To Sub Procedure?
Jan 19, 2011I need to write a procedure which will allow me to set readonly attributes for certain objects, for example:My form contains two text boxes box1, box2.My sub procecdure will contain code which sets box1.readonly() = true, but i dont want to name the "box1" in the sub procedure but pass it as a parameter....I thought this could be achieved using :
private sub disableobject(byval inobject as system.object)
inobject.readonly() = true
end sub
Calling Object Event Sub - Timer Procedure
Jun 3, 2011I'm developing this procedure using a timer object. The thing is the procedure is not in the timer's event procedure but I want it to depend on the timer's interval when executing, it's just not calling the timer procedure. How can u declare objects and use their event procedures in code.
View 2 RepliesEvent Procedure For Object Not Created Until Runtime?
Nov 3, 2009how would I create an event procedure for something not yet on a form?
View 3 RepliesActiveX Object Converted To Be Functional To WPF Standard Procedure?
Aug 20, 2008I have an ActiveX object converted to be functional to WPF (standard procedure: Windows Forms control Library and then embedded into the WPF project using a Windows Forms Host controller). Everything works ok with a simple bug from time to time.I have some things in the Load Event that access the ActiveX controll properties and sometimes I get the error "Exception of type 'System.Windows.Forms.AxHost+InvalidActiveXStateException' was thrown."I guess this happens because the control didn't load before I'm trying to access the properties. That's why I put my properties on a DispatcherTimer with the interval 2 seconds in order to execute them later but I get the same error.
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Can't Open To Connection To SQL Database
Nov 23, 2011I have a .mdf file that I open through an Open Dialog Box and use in a ConnectionStringBuilder (where I have the user instance set to True). Later, in one of my button clicks, I try to open the connection (connection.Open()). It then gives me an error as follows: "Generating user instances in SQL Server is disabled. Use sp_configure 'user instances enabled' to generate user instances."
Here is my code:
Option Strict On
Imports System.Data.SqlClient
Public Class frmMain
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Connection Must Be Valid And Open
Jan 15, 2012I am creating a login form together with sql as may databse but when i run may program an error occur at "myData = myCommand.ExecuteReader()" stating that "Connection must be valid and open" what should i do on that to make it fix? [code]
View 7 RepliesHow To Open Database Connection
May 12, 2005I am currently working on a login page using vb.net. I would like to know how to make connection to an access database and verify that the user logged in is a valid user
View 6 RepliesKeep A Odbc Connection Open?
Jan 14, 2011I'm trying to connect to a database and keep the connection open for any amount of user activity/queries within the database. Currently I have a connection that opens and closes for any query (save, update, etc...) which requires the logon process to the back-end every time the user saves etc... Is there a way to simply connect and leave the connection open so there won't be a lag time when running the query due to the logon process? This is what I'm using:
Private sConStrFormat As String = "Provider=TDOLEDB;Data Source=TDDEV;Persist Security Info=True;User ID={0};Password={1};Default Database=bcpm_ddbo;Session Mode=ANSI;"
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Open Connection To Database?
Jan 17, 2009i want to know how to open a connection to database from vb.net
View 3 RepliesCannot Open Database Using Sql Query For Connection?
Nov 17, 2009i am doin project using vb.net 2005 and using this sql query for connection
sql = "select username from login order by username"
con.ConnectionString = "Data Source=" & hostname & "; Initial Catalog=college;integrated security=sspi"
but m getting the following error:
Cannot open database "college" requested by the login. The login failed.Login failed for user 'CI4Admin'.
DB/Reporting :: IDataReader And Connection Open?
Dec 28, 2010In 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..
DB/Reporting :: SQL Connection Open/close?
Dec 16, 2011SQL 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?
Error: Connection Must Be Valid And Open
Jul 5, 2010I'm trying to insert data into a mysql database, I'm using xampp as well if thats of any relevance? I keep getting this error: Connection must be valid and open.
on cmd.ExecuteNonQuery()
I'm following my Microsoft Access application that I've also written as a reference and that works perfectly.' This is the code for inserting into an access database which works and is tryed and tested:
Imports System.Data.OleDb
Public Class frmEnterDetails
'text box variables
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