Question

I am having difficulties in assigning double value (for example 124.00) of label text in asp.net. This label is in content page of .net master page.

But I am having the following two problems:

<script type="text/javascript">
 var totalAmount = 0; //Defined global variable;

function addval(vals)  //I am passing vals(Double from sever side)
{
totalAmount = totalAmount + vals;
(document.getElementsByTagName("<%= lblCurrentProductTotal.ClientID %>")).value= totalAmount.toString();
}


</script>

• Each time “clickCh” is called; this sets the totalAmount (a global variable) with the parameter passed. It’s like if I pass 145 first time it assigns as "0145" and second time if I pass 156 the totalAmount becomes "0145156" as I am expecting it to add as 145+156=301.

• It’s not assigning the value to the label “lblCurrentProductTotal”
  Please let me know if i am missing something.

Thanks in advance!

Answer 1

You are concatenating strings instead of adding doubles.

Either make sure that vals is passed as a number or turn it into a number using parseFloat like below.

var totalAmount = 0; //Defined global variable;

function addval(vals)  //I am passing vals(Double from sever side)
{
    vals = parseFloat(vals);
    totalAmount = totalAmount + vals;
    (document.getElementsByTagName("<%= lblCurrentProductTotal.ClientID %>")).value= totalAmount.toString();
}