EntityConnectionStringBuilder Classe

Definição

public ref class EntityConnectionStringBuilder sealed : System::Data::Common::DbConnectionStringBuilder

public sealed class EntityConnectionStringBuilder : System.Data.Common.DbConnectionStringBuilder

type EntityConnectionStringBuilder = class
    inherit DbConnectionStringBuilder

Public NotInheritable Class EntityConnectionStringBuilder
Inherits DbConnectionStringBuilder

Herança

Object

DbConnectionStringBuilder

EntityConnectionStringBuilder

Exemplos

O exemplo seguinte demonstra como usar o EntityConnectionStringBuilder em conjunto com um SqlConnectionStringBuilder.

// 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

Observações

O cadeia de ligação builder permite aos desenvolvedores criar programaticamente cadeias de ligação sintaticamente corretas, e analisar e reconstruir cadeias de ligação existentes, utilizando propriedades e métodos da classe. O construtor de cadeia de ligação fornece propriedades fortemente tipadas correspondentes aos pares de palavras-chave e valores conhecidos. Os programadores que têm de criar strings de ligação como parte de aplicações podem usar a EntityConnectionStringBuilder classe para construir e modificar strings de ligação.

Realiza EntityConnectionStringBuilder verificações para pares válidos de palavras-chave/valor, cada um dos quais é exposto como valor de EntityConnectionStringBuilder propriedade.

Ver também

• EntityConnection
• Cadeias de Ligação
• A trabalhar com a EntityClient