SubscriptionFieldCollection.Add Method (SubscriptionField, String)

2008-12-15

Adds a SubscriptionField before another SubscriptionField in the SubscriptionFieldCollection object.

命名空间: Microsoft.SqlServer.Management.Nmo
程序集: Microsoft.SqlServer.Smo (in microsoft.sqlserver.smo.dll)

语法

声明
Public Sub Add ( _
    subscriptionField As SubscriptionField, _
    insertAtColumnName As String _
)

public void Add (
    SubscriptionField subscriptionField,
    string insertAtColumnName
)

public:
void Add (
    SubscriptionField^ subscriptionField, 
    String^ insertAtColumnName
)

public void Add (
    SubscriptionField subscriptionField, 
    String insertAtColumnName
)

public function Add (
    subscriptionField : SubscriptionField, 
    insertAtColumnName : String
)

参数

subscriptionField
The SubscriptionField to add to the collection.

insertAtColumnName
A String value that specifies the name of the subscription field before which to insert the new SubscriptionField object.

备注

This method allows you to insert a subscription field at a specific position in the subscription field list. Each subscription field becomes a column in a table. Depending on how you add subscriptions, the order of the columns can be important.

If you add a subscription field, updating the instance re-creates the subscription class to which it corresponds. Notification Services renames the existing subscription tables by appending "Old" to the table name and then creates new tables. Existing subscription table indexes are left unchanged.

Use the Update method to update the instance.

If you want to transfer data between the old and new subscription tables, it must be done manually. For more information, see 更新应用程序.

示例

The following examples show how to define a subscription field and add it before the GoingTo field in the collection of subscription fields:

// Define a LeavingFrom field and add it before the GoingTo field
SubscriptionField subOrgin = 
    new SubscriptionField(flightSubscriptions, "LeavingFrom");
subOrgin.Type = "nvarchar(6)";
flightSubscriptions.SubscriptionFields.Add(subOrgin, "GoingTo");

' Define a LeavingFrom field and add it before the GoingTo field
Dim subOrgin As SubscriptionField = _
    New SubscriptionField(flightSubscriptions, "LeavingFrom")
subOrgin.Type = "nvarchar(6)"
flightSubscriptions.SubscriptionFields.Add(subOrgin, "GoingTo")

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.