AFEventFrameSearch Class

Public NotInheritable Class AFEventFrameSearch
	Inherits AFSearch(Of AFEventFrame)

Dim instance As AFEventFrameSearch

public ref class AFEventFrameSearch sealed : public AFSearch<AFEventFrame^>

[<SealedAttribute>]
type AFEventFrameSearch =  
    class
        inherit AFSearch<AFEventFrame>
    end

 1' Get the Database
 2Dim myPISystems As New PISystems()
 3Dim myPISystem As PISystem = myPISystems.DefaultPISystem
 4If myPISystem Is Nothing Then
 5    Throw New InvalidOperationException("Default PISystem was not found.")
 6End If
 7Dim myDB As AFDatabase = myPISystem.Databases(dbName)
 8If myDB Is Nothing Then
 9    Throw New InvalidOperationException("Database was not found.")
10End If
11
12' Create a search to find all the event frames created from the 'Event'
13' template, with a start time greater than or equal to three days ago,
14' and its 'Level' attribute value is greater than or equal 45.
15' Note: Time Strings must be in a format supported by AFTime.Parse which
16'       will use current culture And then fall back to invariant culture.
17Dim count As Integer
18Using search As New AFEventFrameSearch(myDB, "FindEvents", "Template:'Event' Start:>='*-3d' |Level:>=45.0")
19
20    search.CacheTimeout = TimeSpan.FromMinutes(10)
21
22    ' When the event frames are returned from a find operation, they are only
23    ' partially loaded into memory, typically enough to display their 
24    ' inherent properties, such as Name, Description, Template, etc.  
25    ' When a piece of information is accessed in the event frame that requires more 
26    ' information, an RPC to the server is made to fully load the event frame.  
27    ' By having the search do a full load, all information is loaded in bulk and
28    ' we can reduce the number of RPCs made to retrieve this information.
29    count = search.GetTotalCount()
30    Console.WriteLine("Found {0} EventFrames.", count)
31    For Each item As AFEventFrame In search.FindObjects(fullLoad:=True)
32        ' Now we can use the event frames without having to make any additional RPCs
33        ' In the example below, accessing the Attributes collection would have 
34        ' caused an additional RPC per element found.
35        ' Now we can use the event frames without having to make any additional RPCs
36        ' In the example below, accessing the Attributes collection would have 
37        ' caused an additional RPC per event frame found.
38        Console.WriteLine("  EventFrame {0} has {1} Attributes", item.Name, item.Attributes.Count)
39    Next
40End Using

No code example is currently available or this language may not be supported.

No code example is currently available or this language may not be supported.