I am developing a software which will connect to a SQL SERVER situated at Head Quarters over a VPN connection.But for times when VPN is disconnected I want my applications at the branches to connect to a local Sql Server installed at a local server.Now all the applications at each of the local machines have their connectionstring stored in their App.config file.When the VPN is disconnected we have to change each of the connection strings on all the applications in each machine. Is there a way to do it automatically switch the connection string depending on whether the Server is reachable or not, and to store the connectionstring at centralised location.
How do I assign a My.Settings.Item connection string to cmd.Connection connection string value?
Dim cmd As New SqlCommand() cmd.Connection = My.Settings.Item("csStaffHoursWorked") cmd.CommandType = CommandType.StoredProcedure cmd.CommandText = "spSaveDeltekImport"
I got this Error Message while I try to preview the records in Dataset Designer:"The connection string could not be found or Data provider associated with the connection string could not be loaded"
I understand the possibilities for encrypting a connection string in .net v4. I have a win forms application that will be used by multiple people on different machines. I understand that I need to protect the connection string at time of the app being first run on the target machine. However I am concerned that for a period of time my connection string will be unencrypted. I am looking for advice in how to deploy my app with the connection string already encrypted or encrypted during installation. encrypting the connection string in a secure way?
I'm developing an app in vb.net (visual studio 2008). I have a Teradata back-end that will be supporting multiple users in a production environment. I need to use variables in the connection string as the user/pass will be changed every 3 months.
For the gist of the application:
In it's most basic form - I have a search form which works correctly - it pulls results into a listbox and the user then double clicks the list box which will then open a form that is bound via table adapter to the back-end table (Teradata). My connection string is fine everywhere in the application. My problem is using a modified connection string for the "fill" function of the table adapter once the form is opened.
I'm using the code below for the on-load event and keep getting an "invalid connection string" - again, the connection string works fine everywhere else in the app, and the variables etc... are working correctly.
Private Sub adaptertest_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load Dim DBConnStr As String = "Provider=TDOLEDB;Data Source=TDDEV;Persist Security
I'm facing a problem after installation any software setup that has a database in access(mdb file) How to I transfer file path in our connection string.
for my vb project, i have to develop a system for a network environment. it means a central database to the application. i don't know how to do that. i am hoping to do a sql database. guyz please help me to do this.if you have any tutorials or any of your advices, will help me a lot.
I want to run a VB.NET desktop application with Centralized MS SQL DB server over internet at more than 72 outlets.The application should be able to run with the local MS SQL database if the internet connection fails. Once the internet connection resumes the local database should do the incremental updates on the centralized server and go live with it.
I am using visual basic dotnet 2008 .I am in need of validating the controls in my forms. but the validation code should not be created for each form , so how to validate the textbox from a centralized code,
I am trying to connect DSN from my VB 2008 project. When i try using myoledb.connectionstring="DSN=myDNSname" I get the following error message An OLEDB provider was not specified in the connectionstring.
what I want to achive is to have a centralized control of my data-forms from my toolbars (toolstrip), like navigating (PREV-NEXT), SAVE, DELETE, CANCLE and so on instead of having it in every form. it worked beautifully in my VB6 projects. below are the codes i did in .NET and it don't seem to work and I guessed it about my use of late binding in .NET.
This is what I have done that don't seem to work. In my project module, frm is declared Public as form object Public frm as system.windows.form().form
Im my childforms i want as soon as the forms are load, activated or have focus, should instantiate or create the form object in my frm. [Code] while in my menu or main form (parent form) with toolstrip buttons, this actually where all individual forms are called. [Code]
and it's flagging an error there: frm.CloseForm is not a member of System.Windows.Forms().Form
and I must say here that I declared all the subs im calling in the childforms PUBLIC, and of-course frm being a late binding type may not have all the Public Method on it.
Why doesn't an exception get thrown when this function is called when there is no ConnectionString set for the Connection? I just spent 15 minutes debugging and staring at it and finally figured out it needed the connection string. Shouldn't an exception get thrown?
Friend Function GetValues(ByVal TableName As String, ByVal FieldName As String) As DataTable Dim cn As New SqlConnection Dim cmd As New SqlCommand[code].....
After using the following code, no errors are shown, but my database is not updated once i have made a change using my management system application.
Dim constring As String = Application.StartupPath.ToString() + "mydatabaseName.mdf" Public c As String = "Data Source=.SQLEXPRESS;AttachDbFilename=" + constring + ";Integrated Security=True;User Instance=True" Sub openConnection() conn.ConnectionString = c conn.Open() End Sub
I using SQL Server 2008 R2 to connect with HTML page. I trying to connect HTML page with login to SQL Database. I have try called the Source but didnt work.
I'm trying to change my connection string to w/e the user wants. After a few tips here and there, this is what I've come up:
1: In my settings I've added - Name(login), Type(String), Scope(User), Value(Nothing)
2: Here is the code I'm using
Private Sub LoginForm1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load 'Here I'm checking if the login in my.settings is there 'If not, I'm going to let the user choose what database
[code]....
The error I get is: Format of the initialization string does not conform to specification starting at index 0.here -
Dim con As New OleDbConnection(My.Settings.login)
When I have my con equal to when I added the datasource from it works.
i have the connection string cn = New OleDbConnection("Provider=Microsoft.Ace.OLEDB.12.0; Persist Security Info = False;" & _ "Data Source=C:printtest2.accdb;")which works fine but my database is in the server in a network what additional details do i need for the connection string The server name is as follows "Prntsvr-Test.auhbr.ctrixa.ad"how do i use the connection string
I have installed sql server 2005 in my machine which is installed vb.net 2008. I want my machine to distribute the database to the clients and make it as server.I don't have that much knowledge of how to overcome this issue as i am awfully naive about it.Let me start it here:I have got an application in vb.net...at first i was using ms access database 2007. then decided to switch on to the sql server since i want to distribute the database to the clients who are going to use my application.When i installed the sql server, i imported my access db files onto sql server database. i enabled tcp/ip as enable in the sql server network Configuration. i want use sql server windows authentication as my default user account of my system for the sake to simplify the issue.
Hence, i connected the sql server into the vb.net through the "add new data source".am done with that...the problem is how do i assign the connection string to the vb.net? Or how do i include a connection string in vb.net which tells every other computer that the database data source is in my computer so that every computer can automatically check it in the network.Where exactly shall i put the connection string...as far as my knowledge is concerned for access database, you can easily identify your connection string in project /properties/settings...it goes here and you put your database in any where.And what is the best connection string do i need for sql server 2005..computers are running windows xp.
I used to work only with asp.net websites before. I know that in ASP.NET website, the connection string is found in the web.config file. My problem is now I have started working with VB.NET applications which needed to be interfaced to a database. How is a connection string created and where should I put it?
Im trying to add data from a text box into an sql server database. But i keep getting an error.executenonquery connection property has not been initialized.
This is the code ive written
Code:Public Class AddForm Private dataCon = New SqlClient.SqlConnection("server=MYSERVER; database=DB; User Id=MYUSERNAME;Password=MYPASSWORD") Private cmd As SqlCommand
i am trying to connect to it via VB.net 2010. I have been trying the following:
Dim myConnection As OleDbConnection Dim myCommand As OleDbCommand Dim dr As OleDbDataReader
[Code]....
And i get the error on the Catch ee As Exception line: ORA-12560: TNS:protocol adapter error
I also have a tnsnames.ora file on my computer but i am unsure if i need to use that when connecting (or really, how too in the first place)? Is it needed for the code above?
I am trying to use a DNS-Less connection to the DB. Not sure if that is what it is doing in this or not?
I have written the following code in a class as my connection string. I want to retrive data from a field in a table in my database using this connecyion string.
Public Class ConnectionString Public Shared Function ConnSQL() As SqlConnection Dim connectionString As String
I made a Windows service which daily deletes some records from a SQL Server database. But i don't know what my connectionstring should look like ... the service and the database will both be located on the server.I found this example, which parts do i need to change ?
