在javascript中设置innerHTML并从C＃获取

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;

Answer 2

You are not able to do that with the Label control as when the page is posted back the content of labels are not posted to the server. You would need to make use of an input control of sorts. Probably a hidden input would be your best bet.

Answer 3

Take a hidden field like below

<asp:HiddenField ID="hdnBody" ClientIDMode="Static" runat="server" />

Then set its value in Jquery like below

<script>
function GetEmailID() {
    var bodyHtml = $("#editor").html();

    $("#hdnBody").val(bodyHtml);  
}
</script>

And in the code behind do this to get it

string body = hdnBody.Value;