EntityConnectionStringBuilder Costruttori

Definizione

Spazio dei nomi:: System.Data.EntityClient

Assembly:: System.Data.Entity.dll

Importante

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Inizializza una nuova istanza della classe EntityConnectionStringBuilder.

Overload

Nome	Descrizione
EntityConnectionStringBuilder()	Inizializza una nuova istanza della classe EntityConnectionStringBuilder.
EntityConnectionStringBuilder(String)	Inizializza una nuova istanza della classe EntityConnectionStringBuilder utilizzando il stringa di connessione fornito.

EntityConnectionStringBuilder()

Inizializza una nuova istanza della classe EntityConnectionStringBuilder.

public:
 EntityConnectionStringBuilder();

public EntityConnectionStringBuilder();

Public Sub New ()

Esempio

Nell'esempio seguente viene illustrato come usare insieme EntityConnectionStringBuilder a un oggetto SqlConnectionStringBuilder. Il codice imposta le proprietà di un SqlConnectionStringBuilder per creare un SqlConnection stringa di connessione che fornisce parte del provider sottostante stringa di connessione. Si noti che il nome del provider non può essere impostato usando la sintassi /SqlConnectionStringBuilder perché non è valida SqlConnection stringa di connessione sintassi. Il codice crea il EntityConnection stringa di connessione impostando le proprietà EntityConnectionStringBuilder.


// Specify the provider name, server and database.
string providerName = "System.Data.SqlClient";
string serverName = ".";
string databaseName = "AdventureWorks";

// Initialize the connection string builder for the
// underlying provider.
SqlConnectionStringBuilder sqlBuilder =
    new SqlConnectionStringBuilder();

// Set the properties for the data source.
sqlBuilder.DataSource = serverName;
sqlBuilder.InitialCatalog = databaseName;
sqlBuilder.IntegratedSecurity = true;

// Build the SqlConnection connection string.
string providerString = sqlBuilder.ToString();

// Initialize the EntityConnectionStringBuilder.
EntityConnectionStringBuilder entityBuilder =
    new EntityConnectionStringBuilder();

//Set the provider name.
entityBuilder.Provider = providerName;

// Set the provider-specific connection string.
entityBuilder.ProviderConnectionString = providerString;

// Set the Metadata location.
entityBuilder.Metadata = @"res://*/AdventureWorksModel.csdl|
                            res://*/AdventureWorksModel.ssdl|
                            res://*/AdventureWorksModel.msl";
Console.WriteLine(entityBuilder.ToString());

using (EntityConnection conn =
    new EntityConnection(entityBuilder.ToString()))
{
    conn.Open();
    Console.WriteLine("Just testing the connection.");
    conn.Close();
}

' Specify the provider name, server and database.
Dim providerName As String = "System.Data.SqlClient"
Dim serverName As String = "."
Dim databaseName As String = "AdventureWorks"

' Initialize the connection string builder for the
' underlying provider.
Dim sqlBuilder As New SqlConnectionStringBuilder

' Set the properties for the data source.
sqlBuilder.DataSource = serverName
sqlBuilder.InitialCatalog = databaseName
sqlBuilder.IntegratedSecurity = True

' Build the SqlConnection connection string.
Dim providerString As String = sqlBuilder.ToString

' Initialize the EntityConnectionStringBuilder.
Dim entityBuilder As New EntityConnectionStringBuilder

'Set the provider name.
entityBuilder.Provider = providerName
' Set the provider-specific connection string.
entityBuilder.ProviderConnectionString = providerString
' Set the Metadata location to the current directory.
entityBuilder.Metadata = "res://*/AdventureWorksModel.csdl|" & _
                            "res://*/AdventureWorksModel.ssdl|" & _
                            "res://*/AdventureWorksModel.msl"

Console.WriteLine(entityBuilder.ToString)

Using conn As EntityConnection = New EntityConnection(entityBuilder.ToString)
    conn.Open()
    Console.WriteLine("Just testing the connection.")
    conn.Close()
End Using

Vedi anche

Stringhe di connessione

Si applica a

EntityConnectionStringBuilder(String)

Inizializza una nuova istanza della classe EntityConnectionStringBuilder utilizzando il stringa di connessione fornito.

public:
 EntityConnectionStringBuilder(System::String ^ connectionString);

public EntityConnectionStringBuilder(string connectionString);

new System.Data.EntityClient.EntityConnectionStringBuilder : string -> System.Data.EntityClient.EntityConnectionStringBuilder

Public Sub New (connectionString As String)

Parametri

connectionString: String

Un stringa di connessione specifico del provider per l'origine dati sottostante.

Esempio


// Specify the provider name, server and database.
string providerName = "System.Data.SqlClient";
string serverName = ".";
string databaseName = "AdventureWorks";

// Initialize the connection string builder for the
// underlying provider.
SqlConnectionStringBuilder sqlBuilder =
    new SqlConnectionStringBuilder();

// Set the properties for the data source.
sqlBuilder.DataSource = serverName;
sqlBuilder.InitialCatalog = databaseName;
sqlBuilder.IntegratedSecurity = true;

// Build the SqlConnection connection string.
string providerString = sqlBuilder.ToString();

// Initialize the EntityConnectionStringBuilder.
EntityConnectionStringBuilder entityBuilder =
    new EntityConnectionStringBuilder();

//Set the provider name.
entityBuilder.Provider = providerName;

// Set the provider-specific connection string.
entityBuilder.ProviderConnectionString = providerString;

// Set the Metadata location.
entityBuilder.Metadata = @"res://*/AdventureWorksModel.csdl|
                            res://*/AdventureWorksModel.ssdl|
                            res://*/AdventureWorksModel.msl";
Console.WriteLine(entityBuilder.ToString());

using (EntityConnection conn =
    new EntityConnection(entityBuilder.ToString()))
{
    conn.Open();
    Console.WriteLine("Just testing the connection.");
    conn.Close();
}

' Specify the provider name, server and database.
Dim providerName As String = "System.Data.SqlClient"
Dim serverName As String = "."
Dim databaseName As String = "AdventureWorks"

' Initialize the connection string builder for the
' underlying provider.
Dim sqlBuilder As New SqlConnectionStringBuilder

' Set the properties for the data source.
sqlBuilder.DataSource = serverName
sqlBuilder.InitialCatalog = databaseName
sqlBuilder.IntegratedSecurity = True

' Build the SqlConnection connection string.
Dim providerString As String = sqlBuilder.ToString

' Initialize the EntityConnectionStringBuilder.
Dim entityBuilder As New EntityConnectionStringBuilder

'Set the provider name.
entityBuilder.Provider = providerName
' Set the provider-specific connection string.
entityBuilder.ProviderConnectionString = providerString
' Set the Metadata location to the current directory.
entityBuilder.Metadata = "res://*/AdventureWorksModel.csdl|" & _
                            "res://*/AdventureWorksModel.ssdl|" & _
                            "res://*/AdventureWorksModel.msl"

Console.WriteLine(entityBuilder.ToString)

Using conn As EntityConnection = New EntityConnection(entityBuilder.ToString)
    conn.Open()
    Console.WriteLine("Just testing the connection.")
    conn.Close()
End Using

Commenti

L'oggetto fornito connectionString non viene controllato per le coppie di parole chiave/valore valide. Per una sintassi valida per parole chiave/valore, vedere ConnectionString.

Il nome del provider invariante deve essere specificato nel connectionString parametro . I provider supportati includono quanto segue:

System.Data.Odbc
System.Data.OleDb
System.Data.OracleClient
System.Data.SqlClient
Microsoft.SqlServerCe.Client

Vedi anche

Stringhe di connessione

Si applica a

Commenti e suggerimenti

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