I have a search button to search the database by a name entered in a text box, this is working fine within visual studio but when trying to use this in the hosted version i get the following message:
Server Error in '/' Application.
A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified)
the code for this button is:
GridView2.Visible = True
lblEnterName.Text = ""
If txtLoanName.Text = "" Then
lblEnterName.Text = "Please enter a Bandie's Name"
Else
Dim conn As SqlConnection = Nothing
Try
Dim connString As String = "Data Source=.\SQLEXPRESS;AttachDbFilename=|DataDirectory|\BandDatabase.mdf;Integrated Security=True;User Instance=True"
conn = New SqlConnection(connString)
Dim query As String = "SELECT [SongName], [PartLearnt], [Status] FROM [Learning] WHERE ([BandieName] LIKE '%' + #Name + '%') ORDER BY [SongName]"
Dim cmd As SqlCommand = New SqlCommand(query, conn)
cmd.Parameters.AddWithValue("#Name", txtLoanName.Text)
conn.Open()
Dim dr As SqlDataReader = cmd.ExecuteReader(CommandBehavior.CloseConnection)
Dim dt As DataTable = New DataTable()
dt.Load(dr)
GridView2.DataSource = dt
GridView2.DataBind()
lblSearchBandieName.Text = "Progress for " + txtLoanName.Text
Finally
conn.Close()
End Try
End If
I am unsure why this is bringing the error as didnt before, all i have done is changed the page the button is on.
Thanks
did you check the information in the connection string? probably not an sqlexpres on the hosted solution. Also you may want to have the connection info in the web.config
Now as an answer....: -)
Related
I am doing a project for class. I am using reportviewer to pull data from a dataconnection named fitnesscompanydb.accdb . It keeps throwing this error now.
System.Data.SqlClient.SqlException: 'A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server)'
Public Class frmSignupReportQuery
Private Sub frmSignupReportQuery_Load(sender As Object, e As EventArgs)
Handles MyBase.Load
Dim startingdate As String = frmSignupReport.SignupDateStart.Text
Dim endingdate As String = frmSignupReport.SignupDateEnd.Text
Dim strConnectionString As String = "Data Source=(local)" '; Initial
Catalog=fitnessCompanyDB.accdb; "
Dim ds As New DataSet()
Dim da As New SqlDataAdapter()
Dim cmd As New SqlCommand("SELECT * FROM Memberbase WHERE
Memberbase.Signupdate = BETWEEN #" & startingdate & "# and #" & endingdate &
"#")
cmd.CommandType = CommandType.Text
cmd.Connection = New SqlConnection(strConnectionString)
da.SelectCommand = cmd
da.Fill(ds, "DataSet1")
Dim rds As New ReportDataSource("DataSet1", ds.Tables(0))
Me.ReportViewer1.LocalReport.ReportPath = "#\SignupReport.rdlc"
Me.ReportViewer1.LocalReport.DataSources.Clear()
Me.ReportViewer1.LocalReport.DataSources.Add(rds)
Me.ReportViewer1.RefreshReport()
End Sub
End Class
I understand that it is probably throwing this error because it cannot find the file because it is not named correctly. How do i add the correct file location so it can locate it?
We are developing windows form app. We have local database which is sdf file. We added reference to our project: SQLServerCe.dll
We are using this code:
Dim strDataSource As String
strDataSource = "Data Source = C:\Users\JOE\Desktop\Class work (7)\Class work\BookIt\BookIt.DBEntity\Library.sdf"
Dim conn As New SqlCeConnection
conn.ConnectionString = strDataSource & ";Password='<password>'"
Dim selectCmd As SqlCeCommand = conn.CreateCommand
selectCmd.CommandText = "SELECT author, title FROM book"
Dim adp As New SqlCeDataAdapter(selectCmd)
Dim ds As New DataSet
' Note: Fill will leave the connection in its original state;
' In this case, the connection was closed so it will be left closed
adp.Fill(ds)
tbAuthor.Text = ds.Tables(0).Rows(0)(0).ToString()
tbTitle.Text = ds.Tables(0).Rows(0)(1).ToString()
This code is not working. This line is giving error:
adp.Fill(ds)
Error: An unhandled exception of type 'System.Data.SqlServerCe.SqlCeException' occurred in System.Data.SqlServerCe.dll
What we are doing wrong? How to solve this problem?
Open the database connection before you create your command object, ie conn.Open()
I have already posted one question about this piece of code before lol. But now I am having a different problem and need help with it. Basically this is code for a search button on a Windows Form coded in VB.NET.
Private Sub SearchButton_Click(sender As Object, e As EventArgs) Handles SearchButton.Click
Dim cnnOLEDB As New OleDbConnection
Dim cmdOLEDB As New OleDbCommand
Dim strConnectionString = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" & System.Environment.CurrentDirectory & "\All Keyed Up, Lock & Safe, LLC.accdb"
cnnOLEDB.ConnectionString = strConnectionString
cnnOLEDB.Open()
Dim Connection As New SqlClient.SqlConnectionStringBuilder
Connection.DataSource = "file:///C:\Users\thelukester145\Documents\All%20Keyed%20Up\All%20Keyed%20Up,%20Lock%20&%20Safe,%20LLC.accdb"
Dim objSQLConnection = New SqlClient.SqlConnection(Connection.ConnectionString)
Dim cmd As New SqlCommand()
Dim myTable As New DataTable()
Dim SearchFor = SearchBox.Text
If AddressButton.Checked Then
cmd.Connection = objSQLConnection
cmd.CommandText = "SELECT * FROM [McDonald's-Corporate Stores] WHERE [Address] LIKE '%" & SearchFor & "%'"
Dim myAdapter As New SqlDataAdapter(cmd)
myAdapter.Fill(myTable)
DataGrid.DataGridView1.DataSource = myTable
ElseIf NumberButton.Checked Then
cmd.Connection = objSQLConnection
cmd.CommandText = "SELECT * FROM [McDonald's-Corporate Stores] WHERE [McOpCo#] LIKE '%" & SearchFor & "%'"
Dim myAdapter As New SqlDataAdapter(cmd)
myAdapter.Fill(myTable)
DataGrid.DataGridView1.DataSource = myTable
End If
DataGrid.Show()
cnnOLEDB.Close()
End Sub
The database that is attempting to be searched is a database of customers for our family buisness. I am trying to search by either the address or store number of our customer. I've worked through who knows how many fatal errors but the newest one has me sort of stumped. It is crashing on myAdapter.Fill(myTable). The error message it gives is this:
An unhandled exception of type 'System.Data.SqlClient.SqlException' occurred in System.Data.dll
Additional information: A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: SQL Network Interfaces, error: 25 - Connection string is not valid)
Any help would be much appreciated :)
Well, you are freely mixin OleDb classes with SqlClient classes. The two are for different database types. OleDb is needed for Access, SqlClient classes are used for Sql Server.
So you need to change all the classes SqlCommand, SqlCommandBuilder, SqlDataAdapter,SqlConnectionStringBuilder with the corresponding classes OleDbCommand, OleDbCommandBuilder, OleDbDataAdapter, OleDbConnectionStringBuilder
Infact, the error message is emitted by the SqlClient library that tries to use your connection string as it was a connectionstring for an SQL Server database and, of course, it fails to find it.
Also, I am not sure about that, but probably the DataSource property doesn't need the prefix file:/// and the Encoding of spaces with %20
I am a developer building websites in VB.Net using Visual Studio 2010. I am trying to populate some fields when a user visits a website based on their decisions on a previous screen.
My connection information is as follows:
Dim myDataReader As SqlDataReader
Dim myConnection As SqlConnection
Dim myCommand As SqlCommand
Dim strSQL As String
myConnection = New SqlConnection("Data Source=localhost\sqlexpress; Database=PREP; Integrated Security=SSPI;")
Try
myConnection.Open()
Catch ex As Exception
MsgBox(ex.Message)
End Try
strSQL = "SELECT * FROM Charts where ID=1"
myCommand = New SqlCommand(strSQL, myConnection)
myDataReader = myCommand.ExecuteReader()
If myDataReader.Read() Then
TextBox1.Text = myDataReader.Item("Priority1")
Else
MsgBox("Didn't work...")
End If
The error I continue to get is:
Cannot open database "PREP" by the login. The login failed. Login failed for user 'OR-AA-Me\Me'
I assumed that since it was a local database I would not need a username and password. Am I wrong?
Also, are there glaring practices in the above code that will be unwise when I transport this to a commercial environment?
Thanks!
Solved:
The connection string simply needed additional filepath information.
The successful connection information was:
myConnection = New SqlConnection("Data Source=.\SQLEXPRESS; AttachDbFilename=|DataDirectory|\PREP.mdf; Integrated Security=True; User Instance=True")
There was no need for a username as the Integrated Security set to True assumes that the computer will use the login information for the user on the actual computer he is using.
ok first ill explain what ive done.
First I imported an access db into my vb app it then named the dataset etc.
this is how my dataSet looks:
1 table
4 columns
so Far i have this:
Dim ds As ElementsDataSet
Dim dt As ElementsDataSet.ElementsDataTable
Dim conn As SqlConnection = New SqlConnection("Data Source=|DataDirectory|\Elements.accdb")
Dim selectString As String = "Select Atomic Mass FROM Elements WHERE No =" & mol
Dim cmd As New SqlCommand(selectString, conn)
If conn.State = ConnectionState.Closed Then conn.Open()
Dim datareader As SqlDataReader = cmd.ExecuteReader()
While datareader.Read = True
MessageBox.Show(datareader.Item("Atomic Mass"))
End While
datareader.Close()
and upon executing this I get this error:
An unhandled exception of type 'System.Data.SqlClient.SqlException' occurred in System.Data.dll
Additional information: A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified)
The problem is you are using a SQLConnection to open a Access database. This wont work.
You either need a SQLServer database or to use the OleDbConnection for a Access database.
Here is a Microsoft KB article to help you connect to the Access database:
How To Retrieve and Display Records from an Access Database by Using ASP.NET, ADO.NET, and Visual Basic .NET and this one over at CodeProject: http://www.codeproject.com/Articles/8477/Using-ADO-NET-for-beginners
Private Sub ReadRecords()
Dim conn As OleDbConnection = Nothing
Dim reader As OleDbDataReader = Nothing
Try
conn = New OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:\Temp\Elements.accdb"))
conn.Open()
Dim cmd As New OleDbCommand("Select Atomic Mass FROM Elements WHERE No =" & mol, conn)
reader = cmd.ExecuteReader()
While reader.Read = True
MessageBox.Show(reader.Item("Atomic Mass"))
End While
Finally
If reader <> Nothing Then
reader.Close()
End If
If conn <> Nothing Then
conn.Close()
End If
End Try
End Sub