VS 2010 SQLExpress And SQLCE Command Objects?
Feb 11, 2011
My app currently uses both SQLExpress and SQLCE, depending on the choice of the user.In my database class I have non query command objects for the CE connection and non query command objects for the express version.
Essentially, this is duplicating code as Parameters.Add etc. has to be repeated on both objects.Is there a way just to add do it once on a common object?
Dim MyConnection As SqlConnection
Dim MyCEConnection As SqlCeConnection
Dim MyNQCommand As SqlCommand
Dim MyCENQCommand As SqlCeCommand
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Jan 5, 2010
Visual Basic Project VB 2010 B2 does not allow you to select the SQL server without specifying a local file attachment while Visual Web Developer VWD 2010 B2 does give you the option to specify either.The Enviroment VB2010 B2, OS VISTA Business, SQL2008 Express SP1 with SQL Server Management Studio.
1) In order to access the SQL server enable the TCP/IP, NamedPipes and SQLbrowser on the SQL Server.
2) The VB Project requires "imports system.data.sqlclient"
3) Using SQL Server Management Studio or VBcode in the VB Project create a Server DataBase called "dbName"
4) Using SQL Server Management Studio or VBcode in the VB Project create a Server DataTables
5) The following code updates the SQL server DataBase name dbName from the projects DataSet.
Private
Sub updateDBase(ByVal dbName As String, ByRef aDS As DataSet)
'CODE to access SQL database directly
'Before an Update sqlCommandBuilder creates
[code]....
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Jun 22, 2011
I'm confused with this piece of code listed below. This code calls the update method of the dataadapter object to save the changes made to the dataSETback to the database itself. What I don't understand about this code is that it creates an update command(cmdUpdate), insert command (cmdInsert) and delete command (cmdDelete). My understanding is that the update method saves the changes back to the database. So I don't understand why the author creates these additional commands.
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Sep 16, 2010
I was just curious as to whether after you have added all of the Parameters to the SQL Command Parameters Collection. Is there a convenient way to iterate or loop through the Parameters and make Assignments to the SQL Command Parameters Values Property?
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Aug 27, 2010
just hoping that someone may be able to point me to some information where I can create VBA objects in vb.net (I am using VS2008). For example, I would like to create a new object in VBA with the command (Dim x as Matrix) where 'Matrix' is an object with various properties and methods.
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Dec 16, 2011
Im considering making my own command line interface with custom commands etc. I was thinking the following objects would be sufficient:
Textbox - for input
Rich text box - for showing processes and output
Button - to insert input
If it can be done, how can I provide line breaks in the output on the rich textbox e.g.
line1: input instruction
Line2: <cp><textfile.txt>
Line3: I/O error, file not found, check file root.
My version of CLI will have no integration with the windows CMD.
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Jun 26, 2009
I'm trying to put together a quick example for another thread about treeviews, and I'm getting a problem when I have a recursive routine, getting the message.
Quote:
There is already an open DataReader associated with this Command which must be closed first.
I'm a tad confused as I am explicitly creating a new command every time through the loop, so I'm not sure (unless its something ADO is doing behind the scenes) how the datareaders higher up the tree are interfering.
Here's my code :
Private Sub SetupChildren(ByVal ParentID As Integer, ByRef ParentNode As TreeNode)
Dim MyCommand As New SqlCommand("SELECT * FROM Groups WHERE ParentGroup=@ParentGroup", m_myConnection)
[Code]...
Obviously I could close the data reader down before calling the next level of recursion but it would prevent the code continuing the loop at the current level when it had finished processing children.
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Jul 15, 2011
Iam using this code to add text to sql 2005 table
Dim SavInto
As
New SqlClient.SqlCommand
[Code].....
now how to add date from DateTimePicker1 to sqlExpress in vb.net2005 using this code?
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Aug 26, 2010
I'm so glad I found this forum. I have been trying for days to connect VB.NET Express to SQLExpress using a very simple, one-table database just for testing with no luck. Then I found this forum and the FAQ and used the template for binding a VB Form to SQL and with a few slight modifications and had success.
I'm connecting using the default instance of SQL (no user instance) and after substituting the the "user Id=" and "password=" section of the connection string with "Integrated Security=SSPI" I was finally able to get data returned from SQL server into VB in a Grid Control.
Now for my question. It's a general thing. Yes, I got that to work but in a complete database scenario, would the connection to the database be done in a Public Sub and left open throughout the duration of the GUI interface (passing in the user ID and password as needed) ..until the user logs off? In other words, the template example closes the connecttion immediately after retrieving the data from the database - and I realize this is an example of simply connecting. So, What is the usual scenario (in the real world for connecting and keeping that connection open for the duration of a user session. Where in the VB app should the connection string really be placed and the connection.(close) be placed?I'm not looking for an extremely detailed answer, just an "in general" scenario.I tend to dive in head first and so, I truly look for answers elsewhere before posting a question but haven't really found an answer to this exact question.
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Aug 20, 2010
I have several programs I have written for my music studio/production company. Many dealing with inventory, customer DB etc. All of my programs are in VB6 and I have started to convert them all to VB.NET. I am getting proficient with VB.NET and connecting to DB using the very simple and generic connection strings, Example:
dbProvider = "PROVIDER=Microsoft.Jet.OLEDB.4.0;"
dbSource = "Data Source = C:/develop/Customer Tracking/resource.mdb"
con.ConnectionString = dbProvider & dbSource
[Code]....
As you can see I am using a basic MSAccess DB and I want to get away from this and start using SQLExpress,
connect to a standard SQLExpress DB? (when I loaded SQLExpress I took the defaults...)
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Jun 29, 2011
I'm setting up a home database. I'm using sqlexpress. I want to use a vb.net programme to manage the database and currently added the database to my data sources. How would I create data for the tables? ( Tables are already set up )
[Code]...
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Aug 6, 2008
I'm trying to export a table called material from a sqlexpress 2005 .mdf file called mydatabase to a csv file programatically in vb2008. i was looking at bcp and the shell command to call it, but simply can't get it to work - i'm calling it like so:
Shell("bcp mydatabase..material out 'c: est.txt' -c -T -S .SQLExpress")is there a way to do this without the shell? i would think it would be a little more professional looking for the app as a whole...
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Jun 2, 2009
I have done this to save it:
Protected Sub AddClient_Click(ByVal sender As Object, ByVal e As EventArgs) Handles AddClient.Click
[code].....
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Aug 3, 2009
i'm trying to display a certain row from a sqlce DB, what shuld the sql command be? i'm using sqldatareader
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Aug 9, 2008
is there any way to attach a sql mdf by filename but actually make the database name something else?
the problem i'm having is that my connection string attaches the database just fine, but it gives the database a name of it's full path on the hard drive when i pull it up in SSMSE. ie. "c:program filesmy programmy database.mdf" is shown as the name when i do a sqlcmd and issue a select name from sys.databases
the snag is being hit due to the fact that i'm trying to do a "bcp in" and because a: there are spaces in the database name, and b: there's the .mdf extension also added to the database name that when i run my bcp in command it errors out, even if i use the -q option of bcp.
if i start SSMSE and right click the database and rename it, bcp works great - so my question is, how do i correctly format my connection string to attach to c:program filesmy programmy database.mdf, yet have it attach the database as "mydatabase" for use in bcp statements?
i've been to connectionstrings.com and they only cover the standard connection strings
in summary - i want to attach an mdf file programmatically and specify the name that ssmse see's it as....
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Oct 23, 2009
I have created a windows exe project called MyCalculator,I have added setup deployment project.I have also added a class project and added a class called Sqlclass, code in this class is stated below
Public Class Sqlclass
Public Sub New()
Dim myProcess As New Process
Dim SqlArguments As String
where to call the above class in deployment project so sql server installed automatically using the above parameter.check the above weather it is correct. After installation will the folder sqlexpress2005 remains?
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Oct 19, 2011
i'm using windows 7 home . and i want start sql server 2005 (SQLEXPRESS) with VB2005. but i can't find command about this thing
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Sep 15, 2009
I am trying to add a new record to a table, well first it checks if there is already a duplicate record in the table, and if not it makes one. If there is a duplicate, it tells the user.[code]
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Nov 10, 2011
First off I would like to apologies for multi posting as I posted this on the SQL forum but someone did suggest putting it here. Here is my problemOkay have developed a form in vb.net cf using sqlce. I know this is the vb.net section but I feel it's a data issue. I have a table called STORES which has a primary key of two columns (ST_STORECODE & ST_CY_CODE)
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Nov 20, 2011
i want to insert onto a SqlCe (sdf) a data that contains a birth date, it reads from a .csv the TextLine(5) is the date in string format: "ddMMyyyy"
i convert to a VB DateTime(), it converts at this way: Day/Month/Year.After that, i insert it to the sql, everything good but the problem is, on the database is always showing as 01/01/1900, what im doing wrong?
Also i put a Console.WriteLine to check if there is any error, no errors as i expected.
apadronado.fecnac is an DateTime also my provider is an cultureinfo is an en-US
[Code]...
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Aug 28, 2011
I'm attempting to insert rows into an SQLCE database, and it's returning that 1 row is affected, there's no exception, and no syntax error in the query as far as I can see - but it's having no effect, when I look in the table from the Database Explorer.
Here's the code, though it probably doesn't make a difference:
Using conn As New SqlCeConnection(My.Settings.DietSafetyCheckerReportsConnectionString)
conn.Open()
Using cmd As SqlCeCommand = conn.CreateCommand()
[code]....
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Oct 19, 2009
i have design a window base application by using VB.NET 2008 and use database SQLCE 3.5 SP1. The application is working fine on all the window 32bits system, but if executive on window 64bits (like windows Vista 64) come out this error message.
[Code]...
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Jun 24, 2008
I'm currently designing a client application that connects to a SQL Server 2005 database. My app is being used to display data, allows users to run reports and stats on the data. It is being developed using VB2008. Within my VB2008 project, the connection string to the DB is made via SQLEXPRESS.
The road block that I'm running into right now is that it only allows me to connect to a local DB file (.mdf) only. I tried to connect to a different DB file on a server within the same network domain, and it generated the following error:
"The file "U:Data.mdf" is on a network path that is not supported for database files. An attempt to attach an auto-named database for file U:Data.mdf failed. A database with the same name exists, or specified file cannot be opened, or it is located on UNC share." (where U: is a mapped network drive).
Below is the actual connection string in my code:
"SERVER=.SQLEXPRESS;AttachDbFilename=U:Data.mdf;Integrated Security=True;Connect Timeout=30;User Instance=True"
The intention is to have the DB reside on a server, where there is another application that runs as a service to collect the data and then populates this DB. Then my app would just connect to the database, and allows users to run reports based on the data in the DB.
I heard that this is the limitation of SQLEXPRESS: it will not allow connection to a remote database. This is true? If so, is there anyway that I can get around this limitation?
The main reason that I chose SQLEXPRESS in the first place is that because of the licensing issue. The company that I work for do not want to make the users of our software app have to purchase additional license for the full-blown SQL Server Enterprise edition. I also heard that SQL Server Enterprise edition does allow you to connect to a remote DB (.mdf) file.
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Sep 14, 2009
I have used Access databases before so thought I'd try something different. My problem is that when I try to add a new record to one of the tables in the databasethe code runs through fine, but the data is not added into the table :S have probably missed something simple, but it's been a while since I did any projects using a database.Here's my code:
Imports System.Data.SqlServerCe
Public Class Form1
Dim con As SqlCeConnection = New SqlCeConnection("Data Source=C:UsersMattDocumentsVisual
[code].....
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Jun 3, 2009
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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May 8, 2010
I am trying to follow an example in the VB 2010 book and the author has set up the local server using a named instance of SQLEXPRESS and uses mixed mode authentication with a sa login and wrox as the password the code is then
[code]...
I am using the Express server initially set up for windows authentication (pubs is one of 6 databases on it) but no matter what I seem to try I can not connect
[code]...
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Apr 12, 2010
I am trying to display a list of databases contained in sqlexpress, in a listview. my current code reads:
[Code]...
This will show up as column headers, but I can't get them to show in only one column so that I can have the user select the database that they would like to work with.
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Jul 22, 2009
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
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Oct 24, 2011
I am having some issues with an application written in VB.net.
As part of a routine, an sqlce database gets backed up before the routine then if an error occurred gets restored. I am using system.io methods copy and delete.
I have released all the objects (connections, commands, datareaders) asscociated with the sqlce database by disposing them if they are not nothing. I also do a GC.COLLECT however when my delete command runs, an error message says it is open by another process. The PROCEXP.exe process explorer tool says it is attached to 4 undefined processes. After a while in debug mode, these clear and I am able to delete the file. However this is not acceptable as my program cannot "wait around" until they are released! I was under the impression that object.dispose forced an immediate disposal rather than waiting for the garbage collector to clean up (if you were just to use object=nothing), but still there appears to be a finite time before these objects are released.
My question is, is there an alternative way of checking (programatically in vb) for what is holding open an sqlce database (or in fact any other file for that matter) then killing these processes?
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Apr 6, 2009
I'm about to pull my hair out on this guys I do not know where I'm going wrong but basically I receive a web request response formatted in XML and I need to insert that data into an SQLCE database. I have tried using LINQ queries but there are no matching ID fields to Join or Group.
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