EntityConnectionStringBuilder Construtores

Definição

Namespace:

System.Data.EntityClient

Assembly:

System.Data.Entity.dll

Inicializa uma nova instância da classe EntityConnectionStringBuilder.

Sobrecargas

EntityConnectionStringBuilder()	Inicializa uma nova instância da classe EntityConnectionStringBuilder.
EntityConnectionStringBuilder(String)	Inicializa uma nova instância da classe EntityConnectionStringBuilder usando a cadeia de conexão fornecida.

EntityConnectionStringBuilder()

Inicializa uma nova instância da classe EntityConnectionStringBuilder.

public:
 EntityConnectionStringBuilder();

public EntityConnectionStringBuilder ();

Public Sub New ()

Exemplos

O exemplo a seguir demonstra como usar o EntityConnectionStringBuilder em conjunto com um SqlConnectionStringBuilder. O código define as propriedades de um SqlConnectionStringBuilder para criar um SqlConnection cadeia de conexão que fornece parte do provedor subjacente cadeia de conexão. Observe que o nome do provedor não pode ser definido usando o SqlConnectionStringBuilder porque não é válido SqlConnection cadeia de conexão sintaxe. O código cria o EntityConnection cadeia de conexão definindo EntityConnectionStringBuilder propriedades.

// 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

Confira também

• Cadeias de conexão
• Trabalhando com EntityClient

EntityConnectionStringBuilder(String)

Inicializa uma nova instância da classe EntityConnectionStringBuilder usando a cadeia de conexão fornecida.

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)

Parâmetros

connectionString

String

Uma cadeia de conexão específica ao provedor para a fonte de dados subjacente.

Exemplos

O exemplo a seguir demonstra como usar o EntityConnectionStringBuilder em conjunto com um SqlConnectionStringBuilder. O código define as propriedades de um SqlConnectionStringBuilder para criar um SqlConnection cadeia de conexão que fornece parte do provedor subjacente cadeia de conexão. Observe que o nome do provedor não pode ser definido usando o SqlConnectionStringBuilder porque não é válido SqlConnection cadeia de conexão sintaxe. O código cria o EntityConnection cadeia de conexão definindo EntityConnectionStringBuilder propriedades. Ele não usa a connectionString sobrecarga.

// 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

Comentários

O fornecido connectionString não é verificado quanto a pares válidos de palavra-chave/valor. Para obter uma sintaxe de palavra-chave/valor válida, consulte ConnectionString.

O nome do provedor invariável deve ser especificado no connectionString parâmetro . Os provedores com suporte incluem o seguinte:

• System.Data.Odbc

• System.Data.OleDb

• System.Data.OracleClient

• System.Data.SqlClient

• Microsoft.SqlServerCe.Client

Confira também

• Cadeias de conexão
• Trabalhando com EntityClient