Question

I have a Server side variable by the following code

 Dim mgps As New Text.StringBuilder
    Public ReadOnly Property GPS() As String
        Get
            Return mgps.ToString
        End Get
    End Property
    Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
        Dim con As New OleDbConnection
        con = New OleDbConnection("Data Source=sml; User ID=sml; Password=sml; provider=OraOLEDB.Oracle")
        con.Open()
        Dim cmd As OleDbCommand = New OleDbCommand("Select STA_NAME, GPS_ONE from GPS", con)

        Dim ds As New DataSet
        Dim I As Long
        Dim da As New OleDbDataAdapter(cmd)
        da.Fill(ds, "GPS")

        mgps.AppendLine("[")
        For I = 0 To ds.Tables("GPS").Rows.Count - 1
            mgps.AppendLine(ds.Tables("GPS").Rows(I).Item("GPS_ONE") & ",")
        Next I
        mgps.AppendLine("];")
    End Sub

The Variable is Global named GPS

Now I am trying to access it in client side JS Array
JS Array is below

 var store_locations = new Array();
    store_locations = [ 
       new google.maps.LatLng(31.204549793299,72.264183974237),
        new google.maps.LatLng(31.23004996385,72.282225091978),
        new google.maps.LatLng(31.148218,72.224542),
        new google.maps.LatLng(31.2330555556,72.3330555556)
        ];

Now I want to use GPS varible values instead of custome values in store_locations.

How can it be done anyone please help me.

Here is my loop where I want to access the array values.

 for(i=0; i<store_locations .length-1; i++)
    {

          var image = 'ico/no.png';
          markers[i] = new google.maps.Marker(
          { 
           position: store_locations [i],
           map: map,
           draggable:true,
           icon:image,
           title: (i+1) + GPS
           });                             
    }    

I have access the GPS variable as below

var GPS = <%=GPS %>

and replace the store_locations with GPS but my map become empty.

Please tell me what exactly i am missing to do this?

Answer 1

You may create a public property that returns GPS value in code-begind. Create a String or StringBuilder object and define public property.

Dim mgps As new Text.StringBuilder

Public ReadOnly Property GPS As String
  Get
     Return mgps.ToString
  End Get
End Property

Use mgps (stringbuilder) object to add data from database result.

mgps.AppendLine("[")
For I = 0 To ds.Tables("GPS").Rows.Count - 1
    mgps.AppendLine(ds.Tables("GPS").Rows(I).Item("GPS_ONE") & ",")
Next I
mgps.AppendLine("];")

Now you can use GPS in JavaScript:

 var  GPS = <%=GPS %>