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Move pins to dataset

This is a discussion on Move pins to dataset within the MapPoint 2006/2009 Discussion forums, part of the Map Forums category; Hi all. I have a vb.net project that is going ok at the moment. I can pin all the data ...


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Old 08-28-2008
Junior Member
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Join Date: Aug 2008
Posts: 23
Move pins to dataset
Hi all.

I have a vb.net project that is going ok at the moment.

I can pin all the data from my sql that has a postcode.

I am looking to add an IF statement, so if the DivisionID is "North", move the pin to odsNorth (a dataset), or IF it is "South" move the pin to odsSouth.

Here is my code which will hopefully help you see what I'm jabbering on about

Code:
        If chkNorthDiv.Checked = True Then
            oMap.DataSets.AddPushpinSet("North Division")
            oDSNorth = oMap.DataSets("North Division")
            oDSNorth.Symbol = symbolNorth
        End If

        If chkSouthDiv.Checked = True Then
            oMap.DataSets.AddPushpinSet("South Division")
            oDSSouth = oMap.DataSets("South Division")
            oDSSouth.Symbol = symbolSouth
        End If


        For Each dr In dsData.Tables(0).Rows
            'If NULL data in Postcode, show message box and carry on
            If dr("PostCode") Is DBNull.Value Then
                sw.WriteLine("Null postcode value at " & dr("ServiceID") & " " & dr("Name"))
            Else
                'set FindResults to look for PostCode, not long/lat and plots Pins
                oFR = oMap.FindResults(dr("PostCode"))
                If oFR.Count > 0 Then

                    oPin = oMap.AddPushpin(oFR(1), dr("Name"))  'default balloon data unless specified from checkboxes



                    If dr("DivisionID") = "Div-N" Then
                        oPin.MoveTo(oDSNorth)
                    End If

                    If dr("DivisionID") = "Div-S" Then
                        oPin.MoveTo(oDSSouth)
                    End If


        Next
There is more stuff inside the loop but this is the essence.

I am not getting an error by the way. It is still pinning all the data, but keeping them in the default "My Pushpins"
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Old 08-28-2008
Junior Member
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Join Date: Aug 2008
Posts: 23
Re: Move pins to dataset
After much reading I got there:
Code:
        oPin.MoveTo(oMap.DataSets.Item("North"))
Still think my theory of

Code:
        oPin.MoveTo(oDSNorth)
Works better though, because it just references the dataset name.
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Old 09-09-2008
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Join Date: Nov 2004
Posts: 2,177
Re: Move pins to dataset
Hi,

No, it does not reference the dataset name, it reference the dataset itself. That is not the same.
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Old 1 Week Ago
NickH
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Join Date: Jun 2008
Location: Bromsgrove, UK
Posts: 21
Re: Move pins to dataset
Quote:
Originally Posted by Wilfried View Post
Hi,

No, it does not reference the dataset name, it reference the dataset itself. That is not the same.
But he IS referencing the Dataset. oDSNorth IS a dataset, not the dataset name.

This is a VB issue I have never quite got my head around. The problem is the brackets.
"oPin.MoveTo oDSNorth" or "Call oPin.MoveTo(oDSNorth)" work

"oPin.MoveTo (oDSNorth)" doesn't.

But I would have expected a 438 error? (Resume next on?)
Last edited by nickhoare; 1 Week Ago at 04:08 AM.. Reason: Correction
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Old 2 Days Ago
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Posts: 2,177
Re: Move pins to dataset
Hi,

I don't know VB, but I like to know if someone can explain the difference.

Code:
1. oPin.MoveTo oDSNorth
2. Call oPin.MoveTo(oDSNorth)
3. oPin.MoveTo (oDSNorth)
What is technically the difference to 1 and 2 ? What does the syntax "call" do?
What is technically the difference in brackets or no brackets in VB? (1 works, 3 does not)?
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