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FunctionValue Class

Represents an Argument object that obtains its value from a Transact-SQL user-defined function.

Spazio dei nomi: Microsoft.SqlServer.NotificationServices.Rules
Assembly : Microsoft.SqlServer.NotificationServices.Rules (in microsoft.sqlserver.notificationservices.rules.dll)

Sintassi

'Dichiarazione
Public Class FunctionValue
    Inherits Argument
public class FunctionValue : Argument
public ref class FunctionValue : public Argument
public class FunctionValue extends Argument
public class FunctionValue extends Argument

Osservazioni

Use the FunctionValue class to use custom database logic to determine an argument value. Your user-defined function must have a scalar return type.

You must specify the user-defined function and parameters in the FunctionValue constructor or using the Parameters and Name properties.

Inheritance Hierarchy

System.Object
   Microsoft.SqlServer.NotificationServices.Rules.RuleObject
     Microsoft.SqlServer.NotificationServices.Rules.Argument
      Microsoft.SqlServer.NotificationServices.Rules.FunctionValue

Esempio

The following example shows the definition of a user-defined function, and then uses this function to evaluate events:

// Subscription based on the following function definition:

/*
create function SoundexMatch(@x nvarchar(max), @y nvarchar(max))
returns bit
as
begin
    if soundex(@x) = soundex(@y)
        return 1

    return 0
end
 * */

// Create subscription and define basic properties.
s = new Subscription(nsApplication, subscriptionClassName);
s.SubscriberId = "Richard";
s.Enabled = true;
s.RuleName = "InventoryTrackerRule";
s.SetFieldValue("DeviceName", "myDevice");
s.SetFieldValue("SubscriberLocale", "en-us");

// Define a condition that uses the function to evaluate
// if the condition is true.
s.Condition = new BooleanLeafCondition(new FunctionValue(
    db.UserDefinedFunctions["SoundexMatch", "dbo"],
    new FieldValue("ProductName"),
    "Rood-250 Black, 48"));

// Add subscription.
s.Add();

Thread Safety

Any public static (Shared in Microsoft Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

Piattaforme

Piattaforme di sviluppo

Per un elenco delle piattaforme supportate, vedere Requisiti hardware e software per l'Installazione di SQL Server 2005.

Piattaforme di destinazione

Per un elenco delle piattaforme supportate, vedere Requisiti hardware e software per l'Installazione di SQL Server 2005.

Vedere anche

Riferimento

FunctionValue Members
Microsoft.SqlServer.NotificationServices.Rules Namespace

Altre risorse

Utilizzo di stored procedure (MDX)