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The Type Or Namespace Name 'SqlServer' Does Not Exist In The Namespace 'System.Data'


I have created a .net class library and i include the namespace :

using System.Data.SqlServer

but when i build my .net class library i get the folowing error:

The type or namespace name 'SqlServer' does not exist in the namespace 'System.Data' (are you missing an assembly reference?) 


your help is highly appreciated

Best regards

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Code Snippet
Imports System
Imports System.Data
Imports System.Data.SqlClient
Imports System.Data.SqlTypes
Imports Microsoft.SqlServer.Server
Imports System.IO
Partial Public Class clr_recentfile
Public Shared Sub clr_recentfile(ByVal Filepath As SqlString)
Dim strFile As String
Dim sp As SqlPipe = SqlContext.Pipe()
Dim maxDate As Date
Dim fil As String
Dim qry As New SqlCommand()
If Directory.Exists(Filepath.ToString) Then
For Each strFile In Directory.GetFiles(Filepath.ToString)
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End Class


Code Snippet
Imports System
Imports System.Data
Imports System.Data.SqlClient
Imports System.Data.SqlTypes
Imports Microsoft.SqlServer.Server
Imports System.IO
Partial Public Class clr_fn_recentfile
<Microsoft.SqlServer.Server.SqlFunction()> _
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End If
End If
sp.Send("Directory does not exist")
Exit Function
End If
If fil <> Nothing Then
Return fil
End If
Catch ex As Exception
End Try
End Function
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            .Parameters("@ImpBase").Value = valorColumna10
            .Parameters("@PorcReten").Value = CDbl(Row.Column11 / 100)
            .Parameters("@ImpReten").Value = CDbl(Row.Column12 / 100)
            .Parameters("@EjerDev").Value = CDbl(Row.Column13)
        End With
    End Sub
    Public Overrides Sub AcquireConnections(ByVal Transaction As Object)
        Dim nDTS As IDTSConnectionManager90 = Me.Connections.TablaMODELO80
        sqlConnecta = CType(nDTS.AcquireConnection(Nothing), SqlConnection)
    End Sub
    Public Overrides Sub PreExecute()
        sqlComm = New SqlCommand("INSERT INTO hac_modelo180(Ejercicio,NIFPerc,NIFReP,Nombre,CodProv,Modalidad,ImpBase,PorcReten,ImpReten,EjerDev) " & _
    "VALUES(@Ejercicio,@NIFPerc,@NIFReP,@Nombre,@CodProv,@Modalidad,@ImpBase,@PorcReten,@ImpReten,@EjerDev)", sqlConnecta)
        sqlParam = New SqlParameter("@Ejercicio", Data.SqlDbType.SmallInt)
        sqlParam = New SqlParameter("@NIFPerc", Data.SqlDbType.Char)
        sqlParam = New SqlParameter("@NIFReP", Data.SqlDbType.Char)
        sqlParam = New SqlParameter("@Nombre", Data.SqlDbType.VarChar)
        sqlParam = New SqlParameter("@CodProv", Data.SqlDbType.TinyInt)
        sqlParam = New SqlParameter("@Modalidad", Data.SqlDbType.SmallInt)
        sqlParam = New SqlParameter("@ImpBase", Data.SqlDbType.Decimal)
        sqlParam = New SqlParameter("@PorcReten", Data.SqlDbType.Decimal)
        sqlParam = New SqlParameter("@ImpReten", Data.SqlDbType.Decimal)
        sqlParam = New SqlParameter("@EjerDev", Data.SqlDbType.Decimal)
    End Sub
    Public Sub New()
    End Sub
    Public Overrides Sub ReleaseConnections()
    End Sub
    Protected Overrides Sub Finalize()
    End Sub
End Class
Thanks a lot for your help  

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I get the following message in the vs2005 querybuilder when i do a preview:


SQL Execution Error.

Executed SQL statement: SELECT Schoolindex, Variant, VVSchool, [index], indincl, VVRuimtes, School FROM School WHERE (Schoolindex = @PARAM1)


Error Source: SQL Server Compact Edition ADO.NET Data Provider

Error Message: @PARAM1 : Unable to cast object of type 'System.Data.SqlTypes.SqlInt32 to type System.IConvertable'.

The same querypreview works fine without the parameter:


SELECT Schoolindex, Variant, VVSchool, [index], indincl, VVRuimtes, School FROM School WHERE (Schoolindex = 186)


Can anybody tell me why this is?
And tell me a way to get the tableadapter working?


Anne-Jan Tuinstra

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I have created a windows library control that accesses a local sql database

I tried the following strings for connecting

Dim connectionString As String = "Data Source=localhostSQLEXPRESS;Initial Catalog=TimeSheet;Trusted_Connection = true"

Dim connectionString As String = "Data Source=localhostSQLEXPRESS;Initial Catalog=TimeSheet;Integrated Security=SSPI"


I am not running the webpage in a virtual directory but in


and I have a simple index.html that tries to read from an sql db but throws

the error

System.Security.SecurityException: Request for the permission of type 'System.Data.SqlClient.SqlClientPermission, System.Data, Version=, Culture=neutral, PublicKeyToken=b77a5c561934e089' failed.
   at System.Security.CodeAccessSecurityEngine.Check(Object demand, StackCrawlMark& stackMark, Boolean isPermSet)
   at System.Security.PermissionSet.Demand()
   at System.Data.Common.DbConnectionOptions.DemandPermission()
   at System.Data.SqlClient.SqlConnection.PermissionDemand()
   at System.Data.SqlClient.SqlConnectionFactory.PermissionDemand(DbConnection outerConnection)
   at System.Data.ProviderBase.DbConnectionClosed.OpenConnection(DbConnection outerConnection,

etc etc

 The action that failed was:
The type of the first permission that failed was:
The Zone of the assembly that failed was:

I looked into the .net config utility but it says unrestricted and I tried adding it to the trusted internet zones in ie options security

I think that a windows form connecting to a sql database running in a webpage should be simple

to configure what am I missing?

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SqlConnection conn = new SqlConnection(conn_str);

Everything works fine when I run it from my computer. When I try to run it from a network share I get the following error,
Request for the permission of type 'System.Data.SqlClient.SqlClientPermission, System.Data, Version=, Culture=neutral, PublicKeyToken=b77a5c561934e089' failed.
I am using Visual Studio 2005 and .Net framwork v2.0.50727.
Does anybody know a fix to this problem?

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I've written this code multiple times now. But for the first time i get an error at the line underlined. My procedure runs perfectly when i execute it through Sql Query analyzer.
plzz help.. Its urgent and am unable to find the reason for this error "A first chance exception of type 'System.Data.SqlClient.SqlException' occurred in"
Thanks !SqlConnection conn = new SqlConnection(DbConnectionString);
SqlCommand cmd = conn.CreateCommand();
cmd.CommandText = "dbo.rqryTradesPRR";
cmd.Parameters.Add("@COBDate",SqlDbType.DateTime).Value = "2002-10-31 00:00:00.000" ;
SqlDataReader reader = cmd.ExecuteReader();
// have written something here

 Thanks in advance !

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this.Variables.ObjVariable this objVariables i have create in variable place below like this


Name:Variable datatype int32 values 0

Name: NumberofRowsdatatype int32  values 10000

Name: ObjVariable  datatype Object


My code



public override void CreateNewOutputRows()



Add rows by calling the AddRow method on the member variable named "<Output Name>Buffer".

For example, call MyOutputBuffer.AddRow() if your output was named "MyOutput".


System.Data.OleDb.OleDbDataAdapter oLead = new System.Data.OleDb.OleDbDataAdapter();

//System.Data.Odbc.OdbcDataAdapter oLead = new System.Data.Odbc.OdbcDataAdapter();

//SqlDataAdapter oLead = new SqlDataAdapter();

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DataSet ds = (DataSet)this.Variables.ObjVariable;  // here i am getting error


ADODB.Record rs = new ADODB.Record();


oLead.Fill(ds, rs, "Variables");

foreach (DataRow row in dt.Rows)




Output0Buffer.Column = (int)row["Column"];

Output0Buffer.Column1 = row["Column1"].ToString();

Output0Buffer.Column2 = row["Column2"].ToString();





This is the error

Unable to cast object of type 'System.Object' to type 'System.Data.DataSet'.

at ScriptMain.CreateNewOutputRows()

at UserComponent.PrimeOutput(Int32 Outputs, Int32[] OutputIDs, PipelineBuffer[] Buffers)

at Microsoft.SqlServer.Dts.Pipeline.ScriptComponentHost.PrimeOutput(Int32 outputs, Int32[] outputIDs, PipelineBuffer[] buffers)




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System.Data.SqlClient.SqlException: The conversion of a char data type to a
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Notes: all pages that have this error either has a repeater or datagrid which load data when page loading.

At first I thought the problem is with the date, but then I can see
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just fine.

anyone having this problem before?? hopefully you guys can help.


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I'm getting this error on a page the needs to execute two separate stored procedures.  The first one, is the main insert, and returns the identity value for the ClientID.  The second stored procedure inserts data, but needs to insert the ClientID returned in the first stored procedure.  What am I doing wrong with including the identity value "ClientID" in the second stored procedure? 
Unable to cast object of type 'System.String' to type 'System.Web.UI.WebControls.Parameter'. 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.InvalidCastException: Unable to cast object of type 'System.String' to type 'System.Web.UI.WebControls.Parameter'.Source Error:

Line 14: If li.Selected Then
Line 15: InsertClientCompanyType.InsertParameters("CompanyTypeID").DefaultValue = li.Value
Line 16: InsertClientCompanyType.InsertParameters("ClientID") = ViewState("ClientID")
Line 17:
Line 18:
Source File: C:InetpubwwwrootIntranetExternalAppsNewEmploymentClientNewClient.aspx.vb    Line: 16
Here is my code behind... What am I doing wrong with grabbing the ClientID from the first stored procedure insert? 
Protected Sub InsertNewClient_Inserted(ByVal sender As Object, ByVal e As SqlDataSourceStatusEventArgs)ClientID.Text = e.Command.Parameters("@ClientID").Value.ToString()ViewState("ClientID") = e.Command.Parameters("@ClientID").Value.ToString()End SubProtected Sub Submit_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Submit.ClickInsertNewClient.Insert()For Each li As ListItem In CompanyTypeID.Items
If li.Selected ThenInsertClientCompanyType.InsertParameters("CompanyTypeID").DefaultValue = li.ValueInsertClientCompanyType.InsertParameters("ClientID") = ViewState("ClientID")InsertClientCompanyType.Insert()End IfNextEnd Sub

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I am trying to make a mobile application work, but I get the following error. The operating system on Pocket PC is Microsoft® Windows Mobile„¢ 2003 Second Edition. Any ideas? Thanks in advance.

The followings are the error and my codes:

System.TypeLoadException was unhandled
  Message="Could not load type 'System.Data.SqlServerCe.SqlCeDataAdapter' from assembly 'System.Data.SqlServerCe, Version=, Culture=neutral, PublicKeyToken=89845DCD8080CC91'."
    at SQLMobile.Form1.Form1_Load()
    at System.Windows.Forms.Form.OnLoad()
    at System.Windows.Forms.Form._SetVisibleNotify()
    at System.Windows.Forms.Control.set_Visible()
    at System.Windows.Forms.Application.Run()
    at SQLMobile.Form1.Main()



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Dim filename As New String _

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Dim conn As New SqlCeConnection("Data Source=" + filename)

Dim selectCmd As SqlCeCommand = conn.CreateCommand()

selectCmd.CommandText = "select Destination from flightdata"

Dim adp As New SqlCeDataAdapter(selectCmd)

Dim ds As New DataSet()


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End sub

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Hi all

Please help me.

I have an 1.1 ( application which accesses data from a sql server 2000. I published this application on and the database I access is on I am getting this error  message when I run the application from this site:

System.Data.SqlClient.SqlException: SQL Server does not exist or access denied.

But it's working fine on my local, development machine.  I am using the following connection string in my connections:

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Is there anything wrong with my code, is there anything that must be done on the web/database server or any other configurations for that matter, what really is the problem??????

Thanks in advance.


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I really sorry because i ask too much ! Because i am a new programming !
Any Help or Advice would like appreciately ! Thanks u !

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Hopefully someone can help me.

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John Berry

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