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DbConnectionStringBuilder.EquivalentTo Method

Compares the connection information in this DbConnectionStringBuilder object with the connection information in the supplied object.

Namespace:  System.Data.Common
Assembly:  System.Data (in System.Data.dll)

public virtual bool EquivalentTo(
	DbConnectionStringBuilder connectionStringBuilder
)

Parameters

connectionStringBuilder
Type: System.Data.Common.DbConnectionStringBuilder
The DbConnectionStringBuilder to be compared with this DbConnectionStringBuilder object.

Return Value

Type: System.Boolean
true if the connection information in both of the DbConnectionStringBuilder objects causes an equivalent connection string; otherwise false.

Comparisons on key names are case insensitive; value comparisons are case sensitive.

The EquivalentTo method returns true if the key/value pairs are equal, regardless of their order. The connection behavior of the two connection strings are equivalent, because order is never significant within connection strings. However, different order may affect connection pooling behavior of connections based on these connection strings.


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();
}


This sample displays the following output:

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

.NET Framework

Supported in: 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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