Cannot See The SQL Express Instance On The Network Server List...

Feb 2, 2007



I have installed SQL Server Express and I can connect with it locally using "localcomputernameSQLEXPRESS". It is configured for remote connection and for some reason, when I browse for this instance on the Network Server, it does not appear in the list. I have unistalled/installed it several times and still I cannot see this instance on the SQL Network server list. Can anyone help troble shoot this frustrating issue...

Thanks!

SAM

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Hi,



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Hi all,

I have SQL Server Express and VB 2005 Express installed in a Microsoft Windows XP Pro PC that is a terminal PC in our office Network. My Network Administrator has granted my terminal PC for Administrator Use. I tried to do the ADO.NET 2.0-VB 2005 programming in my terminal PC and I could not get a remote connection in the Window Form Application via Window Authorization. I do not know how to make this kind of remote connection in my Network. Please help and advise.

Thanks in advance,
Scott Chang

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Hi all,

In my office computer network system (LAN), my Windows XP Pro PC has SQL Server Express and VB 2005 Express installed and I was granted to have the Administrator priviledge to access SQL Server Express. I tried to create a SQLCLR project in my terminal PC.
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2) After I restarted the database engine (I guess!!), I executed the following project code (copied from a book) in my VB 2005 Express:

//////////////--Form9.vb---/////////////////

mports System.Data.SqlClient

Imports System.Data

Public Class Form9

Dim cnn1 As New SqlConnection

Private Sub Form5_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load

'Compute top-level project folder and use it as a prefix for

'the primary data file

Dim int1 As Integer = InStr(My.Application.Info.DirectoryPath, "bin")

Dim strPath As String = Microsoft.VisualBasic.Left(My.Application.Info.DirectoryPath, int1 - 1)

Dim pdbfph As String = strPath & "northwnd.mdf"

Dim cst As String = "Data Source=.sqlexpress;" & _

"Integrated Security=SSPI;" & _

"AttachDBFileName=" & pdbfph

cnn1.ConnectionString = cst

End Sub

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click

'Create a command to create a table

Dim cmd1 As New SqlCommand

cmd1.CommandText = "CREATE TABLE FromExcel (" & _

"FirstName nvarchar(15), " & _

"LastName nvarchar(20), " & _

"PersonID int Not Null)"

cmd1.Connection = cnn1

'Invoke the command

Try

cnn1.Open()

cmd1.ExecuteNonQuery()

MessageBox.Show("Command succeeded.", "Outcome", _

MessageBoxButtons.OK, MessageBoxIcon.Information)

Catch ex As Exception

MessageBox.Show(ex.Message)

Finally

cnn1.Close()

End Try

End Sub

Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click

'Create a command to drop a table

Dim cmd1 As New SqlCommand

cmd1.CommandText = "DROP TABLE FromExcel"

cmd1.Connection = cnn1

'Invoke the command

Try

cnn1.Open()

cmd1.ExecuteNonQuery()

MessageBox.Show("Command succeeded.", "Outcome", _

MessageBoxButtons.OK, MessageBoxIcon.Information)

Catch ex As Exception

MessageBox.Show(ex.Message)

Finally

cnn1.Close()

End Try

End Sub

Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click



'Declare FromExcel Data Table and RowForExcel DataRow

Dim FromExcel As New DataTable

Dim RowForExcel As DataRow

FromExcel.Columns.Add("FirstName", GetType(SqlTypes.SqlString))

FromExcel.Columns.Add("LastName", GetType(SqlTypes.SqlString))

FromExcel.Columns.Add("PersonID", GetType(SqlTypes.SqlInt32))

'Create TextFieldParser for CSV file from spreadsheet

Dim crd1 As Microsoft.VisualBasic.FileIO.TextFieldParser

Dim strPath As String = _

Microsoft.VisualBasic.Left( _

My.Application.Info.DirectoryPath, _

InStr(My.Application.Info.DirectoryPath, "bin") - 1)

crd1 = My.Computer.FileSystem.OpenTextFieldParser _

(My.Computer.FileSystem.CombinePath(strPath, "Book1.csv"))

crd1.TextFieldType = Microsoft.VisualBasic.FileIO.FieldType.Delimited

crd1.Delimiters = New String() {","}

'Loop through rows of CSV file and populate

'RowForExcel DataRow for adding to FromExcel

'Rows collection

Dim currentRow As String()

Do Until crd1.EndOfData

Try

currentRow = crd1.ReadFields()

Dim currentField As String

Dim int1 As Integer = 1

RowForExcel = FromExcel.NewRow

For Each currentField In currentRow

Select Case int1

Case 1

RowForExcel("FirstName") = currentField

Case 2

RowForExcel("LastName") = currentField

Case 3

RowForExcel("PersonID") = CInt(currentField)

End Select

int1 += 1

Next

int1 = 1

FromExcel.Rows.Add(RowForExcel)

RowForExcel = FromExcel.NewRow

Catch ex As Microsoft.VisualBasic.FileIO.MalformedLineException

MsgBox("Line " & ex.Message & _

"is not valid and will be skipped.")

End Try

Loop

'Invoke the WriteToServer method fo the sqc1 SqlBulkCopy

'object to populate FromExcel table in the database with

'the FromExcel DataTable in the project

Try

cnn1.Open()

Using sqc1 As SqlBulkCopy = New SqlBulkCopy(cnn1)

sqc1.DestinationTableName = "dbo.FromExcel"

sqc1.WriteToServer(FromExcel)

End Using

Catch ex As Exception

MessageBox.Show(ex.Message)

Finally

cnn1.Close()

End Try

'Read the FromExcel table and display results in

'a message box

Dim strQuery As String = "SELECT * " & _

"FROM dbo.FromExcel "

Dim str1 As String = ""

Dim cmd1 As New SqlCommand(strQuery, cnn1)

cnn1.Open()

Dim rdr1 As SqlDataReader

rdr1 = cmd1.ExecuteReader()

Try

While rdr1.Read()

str1 += rdr1.GetString(0) & ", " & _

rdr1.GetString(1) & ", " & _

rdr1.GetSqlInt32(2).ToString & ControlChars.CrLf

End While

Finally

rdr1.Close()

cnn1.Close()

End Try

MessageBox.Show(str1, "FromExcel")

End Sub

End Class
//////////////////////////////////////////////////////////////////////////////
I got the following error messages:
SecurityException was unhandled
Request for the permission of type 'System. Security. Permissions.FileIOPermission,mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089'failed that is pointing to the code statement "Dim int1 As Integer = InStr (My.Application.Info.DirectoryPath, "bin")."
Troubleshooting tips:
Store application data in isolated storage.
When deploying an Office solution, check to make sure you have fulfilled all necessary requirments.
Use a certificate to obtain the required permission(s).
If an assembly implementing the custom security references other assemblies, add the referenced assemblies to the full trust assembly list.
Get general help for the exception.

I am a new Microsoft VS.NET Express user to do the SQL Server 2005 Express and VB 2005 Express programming by using the example of a tutorial book. Please help and tell me what is wrong in my SQLCLR sep-up and project coding and how to correct the problems.

Many Thanks in advance,
Scott Chang

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O Remote computer
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Mar 24, 2006

I made a simple ASP.NET 2.0 Website that uses memberships, roles, and access to MS SQL Server 2005 database. Everything works fine on my development computer (WinXP Pro). When I deployed this Website on another computer (WinXP Pro) and tried to access the main page from the same computer, I get the error below.
I disabled the Windows Firewall (the only one I use), I ensured that SQL Server Browser is Active and Running, and I changed Remote Connections in SQL Server 2005 Surface Area Configuration to use Local and Remote connections for all the components.
In my Web.Config I used:
<connectionStrings><add name="sqlConnString" connectionString="Data Source=.SQLEXPRESS;AttachDbFilename=|DataDirectory|DBdemo.mdf;Integrated Security=True;User Instance=True" providerName="System.Data.SqlClient"/></connectionStrings>
Any idea why am I getting the following error?
 
Server Error in '/WebDV' Application.


An error has occurred while establishing a connection to the server.  When connecting to SQL Server 2005, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections. (provider: SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified)
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. Exception Details: System.Data.SqlClient.SqlException: An error has occurred while establishing a connection to the server.  When connecting to SQL Server 2005, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections. (provider: SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified)Source Error:



Line 2027: sqlConnection = New SqlConnection(sqlString)
Line 2028:
Line 2029: If sqlConnection.State = Data.ConnectionState.Closed Then sqlConnection.Open()
Line 2030: If Not Page.IsPostBack ThenSource File: C:InetpubwwwrootWebDVDefault.aspx.vb    Line: 2029 Stack Trace:



[SqlException (0x80131904): An error has occurred while establishing a connection to the server. When connecting to SQL Server 2005, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections. (provider: SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified)]
System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection) +734787
System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj) +188
System.Data.SqlClient.TdsParser.Connect(Boolean& useFailoverPartner, Boolean& failoverDemandDone, String host, String failoverPartner, String protocol, SqlInternalConnectionTds connHandler, Int64 timerExpire, Boolean encrypt, Boolean trustServerCert, Boolean integratedSecurity, SqlConnection owningObject, Boolean aliasLookup) +820
System.Data.SqlClient.SqlInternalConnectionTds.OpenLoginEnlist(SqlConnection owningObject, SqlConnectionString connectionOptions, String newPassword, Boolean redirectedUserInstance) +628
System.Data.SqlClient.SqlInternalConnectionTds..ctor(DbConnectionPoolIdentity identity, SqlConnectionString connectionOptions, Object providerInfo, String newPassword, SqlConnection owningObject, Boolean redirectedUserInstance) +170
System.Data.SqlClient.SqlConnectionFactory.CreateConnection(DbConnectionOptions options, Object poolGroupProviderInfo, DbConnectionPool pool, DbConnection owningConnection) +130
System.Data.ProviderBase.DbConnectionFactory.CreatePooledConnection(DbConnection owningConnection, DbConnectionPool pool, DbConnectionOptions options) +28
System.Data.ProviderBase.DbConnectionPool.CreateObject(DbConnection owningObject) +424
System.Data.ProviderBase.DbConnectionPool.UserCreateRequest(DbConnection owningObject) +66
System.Data.ProviderBase.DbConnectionPool.GetConnection(DbConnection owningObject) +496
System.Data.ProviderBase.DbConnectionFactory.GetConnection(DbConnection owningConnection) +82
System.Data.ProviderBase.DbConnectionClosed.OpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory) +105
System.Data.SqlClient.SqlConnection.Open() +111
Default1.Page_Load(Object sender, EventArgs e) in C:InetpubwwwrootWebDVDefault.aspx.vb:2029
System.Web.UI.Control.OnLoad(EventArgs e) +99
System.Web.UI.Control.LoadRecursive() +47
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +1061



Version Information: Microsoft .NET Framework Version:2.0.50727.42; ASP.NET Version:2.0.50727.42
 

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Hi,



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When I open the SQL Management studio and execute queries it works fine.

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Code Snippet
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