Question

I have two labels:

  <asp:Label ID="Label1" runat="server" Text="Label"></asp:Label>
  <asp:Label ID="Label2" runat="server" Text="Label"></asp:Label>

and I set innerHTML by javascript:

document.getElementById('Label1').innerHTML = position.lat();
document.getElementById('Label2').innerHTML = position.lng();

How I can get those labels values in codebehind? I try:

TextBox2.Text = Label1.Text;

UPDATE:I need to get pushpin location:

  <artem:GoogleMap ID="GoogleMap1" runat="server" 
    EnableMapTypeControl="False" MapType="Roadmap" >        
  </artem:GoogleMap>      
  <artem:GoogleMarkers ID="GoogleMarkers1" runat="server" 
    TargetControlID="GoogleMap1" onclientpositionchanged="handlePositionChanged">
  </artem:GoogleMarkers> 
  <asp:Label ID="Label1" runat="server" Text="Label"></asp:Label>
  <asp:Label ID="Label2" runat="server" Text="Label"></asp:Label>

<script type="text/javascript">
  var list = document.getElementById("Label1");
  function handlePositionChanged(sender, e) {
    printEvent("Position Changed", sender, e);
  }
  function printEvent(name, sender, e) {
    var position = e.latLng || sender.markers[e.index].getPosition();
    document.getElementById('Label1').innerHTML = position.lat();
    document.getElementById('Label2').innerHTML = position.lng();
  }
</script>

protected void Button1_Click(object sender, EventArgs e)
{
    TextBox2.Text = Label1.Text;// return value: Label
}

Answer 1

You cannot access the value on server side. You will have to use a hidden field for that:

<asp:HiddenField ID="Hidden1" runat="server" />

The set the innerHtml value in the Hidden field by doing:

document.getElementById('<%= Hidden1.ClientID %>').value = position.lat();

You can then access it from server side by doing:

TextBox1.Text = Hidden1.Value;