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After you have installed Visual Studio 2010 SP1, SQL Server Compact, and Visual Studio tools for SQL Server Compact, you can create an ASP. For this walkthrough, you will create a Web Forms Web application project.

asp conenction error when the database is updating-21

Asp conenction error when the database is updating

Now that you have a SQL Server Compact database that contains sample data, you can create an Entity Framework model layer that will provide a way to easily query and update data.

As noted earlier, Entity Framework is used in this walkthrough to show that SQL Server Compact works with existing . You are not required to use Entity Framework in order to use SQL Server Compact.

However, if you use the SQL Server Native Client OLE DB provider (SQLNCLI11) instead of SQLOLEDB, you need to make sure to set the Data Type Compatibility keyword to "80" so that the new data types will map correctly to the ADO data types. Open The following sections provide examples of how you can use ADO with the SQL Server Native Client OLE DB provider.

In this example, a recordset is used to retrieve and display the data from an XML column in the SQL Server Adventure Works sample database.

If you installed Visual Studio 2010 SP1 using the Microsoft Web Platform Installer, you can skip this section because you already have the required tools.

If you installed Visual Studio 2010 SP1 by downloading it from MSDN, you should follow this procedure.

Connection String = "Provider=SQLNCLI11;" _ & "Server=(local);" _ & "Database=Adventure Works;" _ & "Integrated Security=SSPI;" _ & "Data Type Compatibility=80;" _ & "MARS Connection=True;" con. Execute("SELECT * FROM Table1", recordsaffected, ad Cmd Text) Set recordset2 = con.

Recordset Dim recordsaffected As Integer Set recordset1 = con.

In addition, the SQL Server Native Client OLE DB provider also defines a new connection string keyword named Data Type Compatibility that is set in the connection string.

Note Existing ADO applications can access and update XML, UDT, and large value text and binary field values using the SQLOLEDB provider. Source = "SELECT Additional Contact Info FROM Person.

The new larger varchar(max), nvarchar(max), and varbinary(max) data types are returned as the ADO types ad Long Var Char, ad Long Var WChar and ad Long Var Binary respectively. Contact " _ & "WHERE Additional Contact Info IS NOT NULL" rst.

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