IDbConnection.State 属性

public:
 property System::Data::ConnectionState State { System::Data::ConnectionState get(); };

public System.Data.ConnectionState State { get; }

member this.State : System.Data.ConnectionState

Public ReadOnly Property State As ConnectionState

属性值

其中一个 ConnectionState 值。

示例

以下示例创建派生类的实例，OleDbConnection并设置其并显示该ConnectionStringState实例。

public void CreateOleDbConnection(){
   OleDbConnection connection = new OleDbConnection();
   connection.ConnectionString =
       "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=Northwind.mdb";
   Console.WriteLine("Connection State: " + connection.State.ToString());
}

Public Sub CreateOleDbConnection()
    Dim connection As New OleDbConnection()
    connection.ConnectionString = _
       "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=Northwind.mdb"
    Console.WriteLine("Connection State: " & connection.State.ToString())
End Sub

注解

允许的状态更改为：

• From Closed to Open， using Open the method of the Connection object.

• From Open to Closed， using the Close method or the Dispose method of the Connection object.