OleDbConnection Construtores

Definição

Inicializa uma nova instância da classe OleDbConnection.Initializes a new instance of the OleDbConnection class.

Sobrecargas

OleDbConnection()

Inicializa uma nova instância da classe OleDbConnection.Initializes a new instance of the OleDbConnection class.

OleDbConnection(String)

Inicializa uma nova instância da classe OleDbConnection com a cadeia de conexão especificada.Initializes a new instance of the OleDbConnection class with the specified connection string.

OleDbConnection()

Inicializa uma nova instância da classe OleDbConnection.Initializes a new instance of the OleDbConnection class.

public:
 OleDbConnection();
public OleDbConnection ();
Public Sub New ()

Exemplos

O exemplo a seguir cria e abre um OleDbConnection.The following example creates and opens an OleDbConnection.

static void OpenConnection(string connectionString)
{
    using (OleDbConnection connection = new OleDbConnection(connectionString))
    {
        try
        {
            connection.Open();
            Console.WriteLine("DataSource: {0} \nDatabase: {1}",
                connection.DataSource, connection.Database);
        }
        catch (Exception ex)
        {
            Console.WriteLine(ex.Message);
        }
        // The connection is automatically closed when the
        // code exits the using block.
    }
}
Public Sub OpenConnection(ByVal connectionString As String)

    Using connection As New OleDbConnection(connectionString)
        Try
            connection.Open()
            Console.WriteLine("DataSource: {0} Database: {1}", _
                connection.DataSource, connection.Database)
        Catch ex As Exception
            Console.WriteLine(ex.Message)
        End Try
        ' The connection is automatically closed when the
        ' code exits the Using block.
    End Using
End Sub

Comentários

Quando uma nova instância de OleDbConnection é criada, as propriedades de leitura/gravação são definidas com os valores iniciais a seguir, a menos que sejam definidas especificamente usando suas palavras-chave associadas na propriedade ConnectionString.When a new instance of OleDbConnection is created, the read/write properties are set to the following initial values unless they are specifically set using their associated keywords in the ConnectionString property.

PropriedadesProperties Valor inicialInitial value
ConnectionString Cadeia de caracteres vazia ("")empty string ("")
ConnectionTimeout 1515
Database Cadeia de caracteres vazia ("")empty string ("")
DataSource Cadeia de caracteres vazia ("")empty string ("")

Você pode alterar o valor dessas propriedades somente usando a propriedade ConnectionString.You can change the value for these properties only by using the ConnectionString property.

Veja também

OleDbConnection(String)

Inicializa uma nova instância da classe OleDbConnection com a cadeia de conexão especificada.Initializes a new instance of the OleDbConnection class with the specified connection string.

public:
 OleDbConnection(System::String ^ connectionString);
public OleDbConnection (string connectionString);
new System.Data.OleDb.OleDbConnection : string -> System.Data.OleDb.OleDbConnection
Public Sub New (connectionString As String)

Parâmetros

connectionString
String

A conexão usada para abrir o banco de dados.The connection used to open the database.

Exemplos

O exemplo a seguir cria e abre um OleDbConnection.The following example creates and opens an OleDbConnection.

static void OpenConnection(string connectionString)
{
    using (OleDbConnection connection = new OleDbConnection(connectionString))
    {
        try
        {
            connection.Open();
            Console.WriteLine("DataSource: {0} \nDatabase: {1}",
                connection.DataSource, connection.Database);
        }
        catch (Exception ex)
        {
            Console.WriteLine(ex.Message);
        }
        // The connection is automatically closed when the
        // code exits the using block.
    }
}
Public Sub OpenConnection(ByVal connectionString As String)

    Using connection As New OleDbConnection(connectionString)
        Try
            connection.Open()
            Console.WriteLine("DataSource: {0} Database: {1}", _
                connection.DataSource, connection.Database)
        Catch ex As Exception
            Console.WriteLine(ex.Message)
        End Try
        ' The connection is automatically closed when the
        ' code exits the Using block.
    End Using
End Sub

Comentários

Quando uma nova instância de OleDbConnection é criada, as propriedades de leitura/gravação são definidas com os valores iniciais a seguir, a menos que sejam definidas especificamente usando suas palavras-chave associadas na propriedade ConnectionString.When a new instance of OleDbConnection is created, the read/write properties are set to the following initial values unless they are specifically set using their associated keywords in the ConnectionString property.

PropriedadesProperties Valor inicialInitial value
ConnectionString connectionString
ConnectionTimeout 1515
Database Cadeia de caracteres vazia ("")empty string ("")
DataSource Cadeia de caracteres vazia ("")empty string ("")

Você pode alterar o valor dessas propriedades somente usando a propriedade ConnectionString.You can change the value for these properties only by using the ConnectionString property.

Veja também

Aplica-se a