Calling Javascript From Codebehind?

Sep 16, 2010

I have read many different resources but am still not sure if this is possible without using AJAX.

I have a javascript function that loads a div into a modal and says "Loading Please Wait" I have named this funciton loadingModal()

function loadingModal(url)
{
loadModal(...)
}

What I need to do is only trigger this after I have verified that the password and username are correct on the server side so:

btnSubmit_OnClick(object sender EventArgs e)
{
string usr;
string password;
if (verify(usr, password))
{
///// TRIGGER JAVASCRIPT HERE
LOAD TONS OF SESSION VARIABLES
.
.
.
}
else
Show Error and Definitely Don't ever mention still loading
}

I know I could just attach an onclientclick call to the javascript however it would load the loading modal even if it was an invalid username and password

Can I trigger javascript mid execution from the server side?

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