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Rank: Newbie
Groups: Member
Joined: 2/6/2010
Posts: 6
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help me to change tag of a trend in process book using vb
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Rank: Administration
Groups: Administration
Joined: 6/20/2008
Posts: 612
Location: Cheshire, United Kingdom.
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Hi Danny, If you mean you wish to remove a trace and then add another, an example is below: Code:
Sub ChangeTrace()
Dim T As Trend
Set T = ThisDisplay.Symbols("Trend1")
If T.TraceCount > 0 Then
T.RemoveTrace 1 'Remove the first trace
T.AddTrace "sinusoid" 'Add another trace
End If
Set T = Nothing
End Sub
Note that if you have multiple traces on a trend then you will need to loop through them to find the trace you wish to remove. Cheers, Rhys. Principal Consultant
Real-Time Data Management @ Wipro Technologies
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Rank: Newbie
Groups: Member
Joined: 2/6/2010
Posts: 6
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Hi Rhys,
Thanks a lot for your quick reply and support.It is working fine .I did some addition to this .i.e. if you type a tag name in a 'text box' it will be added as a current trace.Now my question is ,Is it possible to enter a tag in the 'text box' using tag search.I mean by tag search the selected tag should enter to the 'text box'.(using Vb )
cheers,
danny
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Rank: Advanced Member
Groups: Member
Joined: 12/3/2009
Posts: 71
Location: Germany/Pennsylvania
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Hi Danny,
The easy way is to use the tagsearch dialogue. First add a reference to PI-SDK Dialogs (if not done already add reference to the PISDK type libs). Then you show the dialogue and the selected tags are stored in a pointlist. (Remember, you can select more than one tag and the list can be empty)
Here is an example:
Private Sub cmd_tagsearch_Click()
Dim taglist As PointList
Dim tag As PIPoint
Set taglist = TagSearch.Show
For Each tag In taglist
' do what you want
Next tag
End Sub
Thats all.
Michael
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Rank: Administration
Groups: Administration
Joined: 6/20/2008
Posts: 612
Location: Cheshire, United Kingdom.
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Danny, as a sanity check is there any reason you are not using the built in ProcessBook interface for adding/removing PI Points to a trend? Principal Consultant
Real-Time Data Management @ Wipro Technologies
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Rank: Newbie
Groups: Member
Joined: 2/6/2010
Posts: 6
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Hi Michael,
Thank u very much for your help and giving information about adding reference to PI-SDK Dialogs.I tried this and its working fine.
cheers,
Danny.
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