OleDbConnection.ChangeDatabase(String) 方法

定義

命名空間:

System.Data.OleDb

組件:

System.Data.OleDb.dll

套件:

System.Data.OleDb v8.0.0

來源:

OleDbConnection.cs

為開啟的 OleDbConnection 變更目前的資料庫。

public:
 override void ChangeDatabase(System::String ^ value);

public override void ChangeDatabase (string value);

override this.ChangeDatabase : string -> unit

Public Overrides Sub ChangeDatabase (value As String)

參數

value

String

資料庫名稱。

實作

ChangeDatabase(String)

例外狀況

ArgumentException

資料庫名稱無效。

InvalidOperationException

連接未開啟。

OleDbException

無法變更資料庫。

範例

下列範例會建立 ， OleDbConnection 並顯示其部分唯讀屬性。

static void ChangeDatabaseConnection(string connectionString)
{
   using (OleDbConnection connection = new OleDbConnection(connectionString))
   {
      try
      {
         connection.Open();
         Console.WriteLine("ServerVersion: {0} \nDatabase: {1}",
             connection.ServerVersion, connection.Database);

         connection.ChangeDatabase("Northwind");
         Console.WriteLine("ServerVersion: {0} \nDatabase: {1}",
            connection.ServerVersion, connection.Database);
      }
      catch (Exception ex)
      {
         Console.WriteLine(ex.Message);
      }
      // The connection is automatically closed when the
      // code exits the using block.
   }
}

Public Sub ChangeDatabaseConnection(ByVal connectionString As String)

   Using connection As New OleDbConnection(connectionString)
      Try
         connection.Open()
         Console.WriteLine("Server Version: {0} Database: {1}", _
             connection.ServerVersion, connection.Database)
         connection.ChangeDatabase("Northwind")
         Console.WriteLine("Server Version: {0} Database: {1}", _
            connection.ServerVersion, 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

備註

參數中 database 提供的值必須是有效的資料庫名稱。 參數 database 不能包含 Null 值、空字串或只有空白字元的字串。

另請參閱

• 連接到資料來源