OdbcConnectionStringBuilder.ContainsKey(String) Método

Definición

Espacio de nombres:
System.Data.Odbc
Ensamblado:
System.Data.Odbc.dll
Ensamblado:
System.Data.dll
Paquete:
System.Data.Odbc v11.0.0-preview.4.26230.115
Source:
OdbcConnectionStringbuilder.cs
Source:
OdbcConnectionStringbuilder.cs
Source:
OdbcConnectionStringbuilder.cs
Source:
OdbcConnectionStringbuilder.cs

Determina si contiene OdbcConnectionStringBuilder una clave específica.

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

Parámetros

keyword
String

Clave que se va a buscar en .OdbcConnectionStringBuilder

Devoluciones

Boolean

true OdbcConnectionStringBuilder es si contiene un elemento que tiene la clave especificada; de lo contrariofalse, es .

Excepciones

ArgumentNullException

keyword es null (Nothing en Visual Basic).

Ejemplos

En el ejemplo siguiente se crea una OdbcConnectionStringBuilder instancia, se establecen algunas de sus propiedades y, a continuación, se intenta determinar si existen varias claves dentro del objeto llamando al ContainsKey método .

using System.Data.Odbc;

class Program
{
    static void Main()
    {
        OdbcConnectionStringBuilder  builder = new OdbcConnectionStringBuilder();
        builder.Driver = "Microsoft Visual FoxPro Driver";
        builder["SourceType"] = "DBC";

        // Keys that you have provided return true.
        Console.WriteLine(builder.ContainsKey("SourceType"));

        // Comparison is case insensitive.
        Console.WriteLine(builder.ContainsKey("sourcetype"));

        // Keys added by the provider return false. This method
        // only examines keys added explicitly.
        Console.WriteLine(builder.ContainsKey("DNS"));

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

        Console.WriteLine("Press Enter to continue.");
        Console.ReadLine();
    }
}

Imports System.Data.Odbc    

Module Module1
  Sub Main()
    Dim builder As New OdbcConnectionStringBuilder()
    builder.Driver = "Microsoft Visual FoxPro Driver"
    builder("SourceType") = "DBC"

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

    ' Comparison is case insensitive.
    Console.WriteLine(builder.ContainsKey("sourcetype"))

    ' Keys added by the provider return false. This method
    ' only examines keys added explicitly.
    Console.WriteLine(builder.ContainsKey("DNS"))

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

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

Se aplica a

Consulte también