DbConnectionStringBuilder.EquivalentTo(DbConnectionStringBuilder) Méthode

  • Référence

Définition

Espace de noms:
System.Data.Common
Assembly:
System.Data.Common.dll
Assembly:
System.Data.dll
Assembly:
netstandard.dll
Source:
DbConnectionStringBuilder.cs
Source:
DbConnectionStringBuilder.cs
Source:
DbConnectionStringBuilder.cs

Compare les informations de connexion de cet objet DbConnectionStringBuilder avec les informations de connexion de l’objet fourni.

public:
 virtual bool EquivalentTo(System::Data::Common::DbConnectionStringBuilder ^ connectionStringBuilder);
public virtual bool EquivalentTo (System.Data.Common.DbConnectionStringBuilder connectionStringBuilder);
abstract member EquivalentTo : System.Data.Common.DbConnectionStringBuilder -> bool
override this.EquivalentTo : System.Data.Common.DbConnectionStringBuilder -> bool
Public Overridable Function EquivalentTo (connectionStringBuilder As DbConnectionStringBuilder) As Boolean

Paramètres

connectionStringBuilder
DbConnectionStringBuilder

DbConnectionStringBuilder à comparer à l’objet DbConnectionStringBuilder.

Retours

Boolean

true si les informations de connexion dans les deux objets DbConnectionStringBuilder provoquent une chaîne de connexion équivalente ; sinon false.

Exemples

static void Main()
{
    DbConnectionStringBuilder builder1 =
        new DbConnectionStringBuilder();
    builder1.ConnectionString =
        "Value1=SomeValue;Value2=20;Value3=30;Value4=40";
    Console.WriteLine("builder1 = " + builder1.ConnectionString);

    DbConnectionStringBuilder builder2 =
        new DbConnectionStringBuilder();
    builder2.ConnectionString =
        "value2=20;value3=30;VALUE4=40;Value1=SomeValue";
    Console.WriteLine("builder2 = " + builder2.ConnectionString);

    DbConnectionStringBuilder builder3 =
        new DbConnectionStringBuilder();
    builder3.ConnectionString =
        "value2=20;value3=30;VALUE4=40;Value1=SOMEVALUE";
    Console.WriteLine("builder3 = " + builder3.ConnectionString);

    // builder1 and builder2 contain the same
    // keys and values, in different order, and the
    // keys are not consistently cased. They are equivalent.
    Console.WriteLine("builder1.EquivalentTo(builder2) = " +
        builder1.EquivalentTo(builder2).ToString());

    // builder2 and builder3 contain the same key/value pairs in the
    // the same order, but the value casing is different, so they're
    // not equivalent.
    Console.WriteLine("builder2.EquivalentTo(builder3) = " +
        builder2.EquivalentTo(builder3).ToString());

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

Sub Main()
    Dim builder1 As New DbConnectionStringBuilder
    builder1.ConnectionString = _
        "Value1=SomeValue;Value2=20;Value3=30;Value4=40"
    Console.WriteLine("builder1 = " & builder1.ConnectionString)

    Dim builder2 As New DbConnectionStringBuilder
    builder2.ConnectionString = _
        "value2=20;value3=30;VALUE4=40;Value1=SomeValue"
    Console.WriteLine("builder2 = " & builder2.ConnectionString)

    Dim builder3 As New DbConnectionStringBuilder
    builder3.ConnectionString = _
        "value2=20;value3=30;VALUE4=40;Value1=SOMEVALUE"
    Console.WriteLine("builder3 = " & builder3.ConnectionString)

    ' builder1 and builder2 contain the same
    ' keys and values, in different order, and the 
    ' keys are not consistently cased. They are equivalent.
    Console.WriteLine("builder1.EquivalentTo(builder2) = " & _
        builder1.EquivalentTo(builder2).ToString())

    ' builder2 and builder3 contain the same key/value pairs in the 
    ' the same order, but the value casing is different, so they're
    ' not equivalent.
    Console.WriteLine("builder2.EquivalentTo(builder3) = " & _
        builder2.EquivalentTo(builder3).ToString())

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

Cet exemple affiche la sortie suivante :

builder1 = value1=SomeValue;value2=20;value3=30;value4=40
builder2 = value2=20;value3=30;value4=40;value1=SomeValue
builder3 = value2=20;value3=30;value4=40;value1=SOMEVALUE
builder1.EquivalentTo(builder2) = True
builder2.EquivalentTo(builder3) = False

Remarques

Les comparaisons sur les noms de clés ne respectent pas la casse ; les comparaisons de valeurs respectent la casse.

La EquivalentTo méthode retourne true si les paires clé/valeur sont égales, quel que soit leur ordre. Le comportement de connexion des deux chaînes de connexion est équivalent, car l’ordre n’est jamais significatif dans les chaînes de connexion. Toutefois, un ordre différent peut affecter le comportement de regroupement des connexions en fonction de ces chaînes de connexion.

S’applique à

Voir aussi