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OracleConnectionStringBuilder.ContainsKey Method

Determines whether the OracleConnectionStringBuilder contains a specific key.

Namespace: System.Data.OracleClient
Assembly: System.Data.OracleClient (in system.data.oracleclient.dll)

public override bool ContainsKey (
	string keyword
)
public boolean ContainsKey (
	String keyword
)
public override function ContainsKey (
	keyword : String
) : boolean
Not applicable.

Parameters

keyword

The key to locate in the OracleConnectionStringBuilder.

Return Value

true if the OracleConnectionStringBuilder contains an element that has the specified key; otherwise, false.

Exception typeCondition

ArgumentNullException

keyword is null (Nothing in Visual Basic)

Because the OracleConnectionStringBuilder contains a fixed-size collection of key/value pairs, the ContainsKey method determines only if a particular key name is valid.

The following example creates an OracleConnectionStringBuilder instance, sets some of its properties, and then tries to determine whether various keys exist within the object by calling the ContainsKey method.

// You may need to set a reference to the System.Data.OracleClient
// assembly before you can run this sample.
using System.Data.OracleClient;

class Program
{
    static void Main()
    {
        OracleConnectionStringBuilder builder =
            new OracleConnectionStringBuilder(GetConnectionString());
        Console.WriteLine("Connection string = " + builder.ConnectionString);

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

        // Comparison is case insensitive, and synonyms for the 
        // keywords are translated to well-known names.
        // The following returns true because "PWD" is a 
        // synonym for "Password", a valid key.
        Console.WriteLine(builder.ContainsKey("PWD"));

        // 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"));

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

    private static string GetConnectionString()
    {
        // To avoid storing the connection string in your code,
        // you can retrieve it from a configuration file. 
        return "Server=OracleDemo;Integrated Security=True";
    }
}

Windows 98, Windows Server 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0
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