Not able to call .NET function with return value in javascript

[amittinku]

ASP.NET function: public int withparam(int x) { int y; y = x + 10; return y; } HTML button function Button1_onclick() { <% var st = withparam(10); %>; document.write(st); } When i click on button, it says var st could not be found. Please let me know where the syntax is wrong and is this the right way

[Nisha Agrawal]

you are getting this error as you have declared variable 'st' in <% %> block, means it is declared server side and you are using it at client side. so declare it at client side and assign value by calling server side method.

var st;
st = <% withparam(10) %>;
document.write(st);

[amittinku]

I have applied your code. st = <% withparam(10) %>;->It does not work. Please let me know the solution.

[Nisha Agrawal]

amittinku wrote:

It does not work.

what does mean by this? do u got some error or what?

[amittinku]

no error as such. It does not return anything, i mean return null.

[Nisha Agrawal]

Replace the line

st = <% withparam(10) %>;

with this

st = <%= withparam(10) %>;

it would work surely. i have tested it.

[codelinks]

use javascript code for withparam function instead of server side code // JScript File function withparam(x) { var y = x + 10; return y; } function Button1_onclick() { var st = withparam(10); document.write(st); alert(st); } call Button1_onclick in OnClientClick

winnie

[Nisha Agrawal]

Yes, the withparam is the actual function to be called, i mean if we don't need any server side processing then this way would be the best.