FunctionValue Class

项目
12/15/2008

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

命名空间: Microsoft.SqlServer.NotificationServices.Rules
程序集: Microsoft.SqlServer.NotificationServices.Rules (in microsoft.sqlserver.notificationservices.rules.dll)

语法

声明
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

备注

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

示例

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();

线程安全

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.

平台

开发平台

有关支持的平台列表，请参阅安装 SQL Server 2005 的硬件和软件要求。

目标平台