OracleConnectionStringBuilder.ContainsKey(String) Metode

Definisi

Ruang nama:

System.Data.OracleClient

Rakitan:

System.Data.OracleClient.dll

Menentukan apakah berisi OracleConnectionStringBuilder kunci tertentu.

public:
 override bool ContainsKey(System::String ^ keyword);

public override bool ContainsKey (string keyword);

override this.ContainsKey : string -> bool

Public Overrides Function ContainsKey (keyword As String) As Boolean

Parameter

keyword

String

Kunci untuk menemukan di OracleConnectionStringBuilder.

Mengembalikan

Boolean

true OracleConnectionStringBuilder jika berisi elemen yang memiliki kunci yang ditentukan; jika tidak, false.

Pengecualian

ArgumentNullException

keyword null (Nothing dalam Visual Basic)

Contoh

Contoh berikut membuat instans OracleConnectionStringBuilder , mengatur beberapa propertinya, lalu mencoba menentukan apakah berbagai kunci ada dalam objek dengan memanggil ContainsKey metode .

OracleConnectionStringBuilder builder =
    new(GetConnectionString());
Console.WriteLine($"Connection string = '{builder.ConnectionString}'");

// Keys you've provided return true.
Console.WriteLine(builder.ContainsKey("Integrated Security"));

// Keys that are valid but have not been set return true.
Console.WriteLine(builder.ContainsKey("Unicode"));

// Keys that do not exist return false.
Console.WriteLine(builder.ContainsKey("MyKey"));

Sub Main()
    Dim builder As _
 New OracleConnectionStringBuilder(GetConnectionString())
    Console.WriteLine("Connection string = " & builder.ConnectionString)

    ' Keys you have provided return true.
    Console.WriteLine(builder.ContainsKey("Integrated Security"))

    ' Keys that are valid but have not been set return true.
    Console.WriteLine(builder.ContainsKey("Unicode"))

    ' Keys that don't exist return false.
    Console.WriteLine(builder.ContainsKey("MyKey"))

    Console.WriteLine("Press Enter to continue.")
    Console.ReadLine()
End Sub

Private Function GetConnectionString() As String
    ' To avoid storing the connection string in your code,
    ' you can retrieve it from a configuration file.
    Return "Server=OracleDemo;Integrated Security=True"
End Function

Keterangan

OracleConnectionStringBuilder Karena berisi kumpulan pasangan kunci/nilai ukuran tetap, ContainsKey metode ini hanya menentukan apakah nama kunci tertentu valid.

Lihat juga

• Membangun String Koneksi