EntityConnectionStringBuilder Konstruktor

Definisi

Ruang nama:

System.Data.EntityClient

Rakitan:

System.Data.Entity.dll

Menginisialisasi instans baru kelas EntityConnectionStringBuilder.

Overload

EntityConnectionStringBuilder()	Menginisialisasi instans baru kelas EntityConnectionStringBuilder.
EntityConnectionStringBuilder(String)	Menginisialisasi instans EntityConnectionStringBuilder baru kelas menggunakan string koneksi yang disediakan.

EntityConnectionStringBuilder()

Menginisialisasi instans baru kelas EntityConnectionStringBuilder.

public:
 EntityConnectionStringBuilder();

public EntityConnectionStringBuilder ();

Public Sub New ()

Contoh

Contoh berikut menunjukkan cara menggunakan EntityConnectionStringBuilder bersama dengan SqlConnectionStringBuilder. Kode menetapkan properti SqlConnectionStringBuilder untuk membuat SqlConnection string koneksi yang memasok bagian dari penyedia yang mendasar string koneksi. Perhatikan bahwa nama Penyedia tidak dapat diatur menggunakan SqlConnectionStringBuilder karena tidak valid SqlConnection string koneksi sintaksis. Kode membuat EntityConnection string koneksi dengan mengatur EntityConnectionStringBuilder properti.

// 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

Lihat juga

• String Koneksi
• Bekerja dengan EntityClient

EntityConnectionStringBuilder(String)

Menginisialisasi instans EntityConnectionStringBuilder baru kelas menggunakan string koneksi yang disediakan.

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)

Parameter

connectionString

String

String koneksi khusus penyedia ke sumber data yang mendasar.

Contoh

Contoh berikut menunjukkan cara menggunakan EntityConnectionStringBuilder bersama dengan SqlConnectionStringBuilder. Kode menetapkan properti SqlConnectionStringBuilder untuk membuat SqlConnection string koneksi yang memasok bagian dari penyedia yang mendasar string koneksi. Perhatikan bahwa nama Penyedia tidak dapat diatur menggunakan SqlConnectionStringBuilder karena tidak valid SqlConnection string koneksi sintaksis. Kode membuat EntityConnection string koneksi dengan mengatur EntityConnectionStringBuilder properti. Ini tidak menggunakan connectionString kelebihan beban.

// 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

Keterangan

Yang disediakan connectionString tidak diperiksa untuk pasangan kata kunci/nilai yang valid. Untuk sintaks kata kunci/nilai yang valid, lihat ConnectionString.

Nama Penyedia invariant harus ditentukan dalam connectionString parameter . Penyedia yang didukung mencakup hal-hal berikut:

• System.Data.Odbc

• System.Data.OleDb

• System.Data.OracleClient

• System.Data.SqlClient

• Microsoft.SqlServerCe.Client

Lihat juga

• String Koneksi
• Bekerja dengan EntityClient