How to pass and convert asp.net TextBox String to a Float Variable in JavaScript?

Question

I'm trying to pass and convert two asp.net TextBoxes to a JavaScript Float.

This is my JavaScript code:

var Jvar1 = parseFloat(getElementById("<%= LogTextBox.ClientID %>").value);
var Jvar2 = parseFloat(getElementById("<%= LatTextBox.ClientID %>").value);

This my Asp.net code:

<asp:Table ID="tbsiteinfo" runat="server">

<asp:TableRow>
<asp:TableCell HorizontalAlign="left" CssClass="paddingLeftRight5px"  >
<asp:Label ID="Label26" runat="server" Width="220px" Text="Lat"></asp:Label>
</asp:TableCell>
<asp:TableCell HorizontalAlign="left" CssClass="paddingLeftRight5px" >
<asp:TextBox Width="200px" ID="LatTextBox" runat="server"></asp:TextBox>
</asp:TableCell>
</asp:TableRow>
<asp:TableRow>
<asp:TableCell HorizontalAlign="left" CssClass="paddingLeftRight5px"  >
<asp:Label ID="Label27" runat="server" Width="220px" Text="Log"></asp:Label>
</asp:TableCell>
<asp:TableCell HorizontalAlign="left" CssClass="paddingLeftRight5px" >
<asp:TextBox Width="200px" ID="LogTextBox" runat="server"></asp:TextBox>
</asp:TableCell>
</asp:TableRow>

</asp:Table>

For some reason the values are not coming up at all. Any ideas? thanks so much for the help.

It should be document.getElementById.

Irfan TahirKheli
– Irfan TahirKheli

2013-10-24 20:37:53 +00:00
Commented Oct 24, 2013 at 20:37 — Irfan TahirKheli
– Irfan TahirKheli, Commented Oct 24, 2013 at 20:37

Sachin · Accepted Answer · 2013-10-24 20:33:20Z

1

getElementById is the function of document object, so you need to use it like document.getElementById('id'). So your syntax would be.

var Jvar1 = parseFloat(document.getElementById("<%= LogTextBox.ClientID %>").value);

edited Oct 24, 2013 at 20:33

answered Oct 24, 2013 at 20:27

Sachin

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