VB.NET/SQL System.Argument Exception - sql-server

Question

I am brand new to programming, and I have been encountering several errors as I work to build an application. The additional information section of the Visual Studio error box delivers the following message:
An unhandled exception of type 'System.ArgumentException' occurred in System.Data.dll
Additional information: Format of the initialization string does not conform to specification starting at index 0.
This occurs as the application attempts to execute the following line of code:
Dim da As New SqlDataAdapter(sql, cs)
I have been working to troubleshoot this to no avail. Thanks for any help you are kind enough to provide! Please find the additional info/code for the class below:
Imports System.Data
Imports System.Data.SqlClient
Public Class DButil
Public cs As String
Public Function GetDataView(ByVal sql As String) As DataView
Dim ds As New DataSet
Dim da As New SqlDataAdapter(sql, cs)
da.Fill(ds)
Dim dv As New DataView(ds.Tables(0))
Return dv
End Function
Public Sub New()
cs = "Data Source=(LocalDB)\v11.0"
cs += "Data Source=(LocalDB)'C:\Users\Sean\Documents\Visual Studio 2013\Projects\349591\349591\cms.mdf';Integrated Security=True;"
cs += "Integrated Security =True;Connect Timeout=30"
End Sub
End Class
Thanks for the reply, Steve. That removed the error from the following line: Dim da As New SqlDataAdapter(sql, cs). An error now appears on the following line: da.Fill(ds). This error says SqlException unhandled, and that an expression of non-boolean type where a condition is expected near ",". Thoughts? –

Answer 1

Your connection string is really wrong.
For Sql Server 2012 with LocalDB instance you need
Public Sub New()
cs = "Server=(LocalDB)\v11.0;"
cs += "Integrated Security=True;"
cs += "AttachDbFileName=C:\Users\Sean\Documents\Visual Studio 2013\Projects\349591\349591\cms.mdf;"
End Sub
See examples of connectionstrings for Sql Server at connectionstrings.com

Answer 2

Your connection string is definitely wrong. Have a look at http://www.connectionstrings.com/sqlconnection/localdb-automatic-instance-with-specific-data-file/
Here is an example of how to query your database and return a dataview
Public Function GetDataView(sql As String) As DataView
Dim cs = "Server=(localdb)\v11.0;Integrated Security=true;AttachDbFileName=C:\Users\Sean\Documents\Visual Studio 2013\Projects\349591\349591\cms.mdf;"
Using cnn As New SqlConnection(cs)
Using cmd As New SqlCommand(sql, cnn)
Try
cnn.Open()
Dim t As New DataTable
t.Load(cmd.ExecuteReader)
Return New DataView(t)
Catch ex As Exception
''handle the error
End Try
End Using
End Using
End Function