calll html button onclick event from asp server side login authenticate event

Question

Need to programmatically click an html button from a login event (code behind? the html button sends variables to Flash using method: no response - with no postback and uses ExternalInterface API via javascript.

Going from SWF > ASPX is great, but need to send User.Identity to SWF from ASPX via javascript after authenticate with login event which am having impossible time getting to work... (calling HTML event from Login button) tried scripting in javascript to login event with no luck, possibly because postback clears SWF variables - so perhaps keeping separate (login then html send) would work...

Here is my relevant code:

 function sendToActionScript(value) {
   swfobject.getObjectById("Property").sendToActionScript(value);   
 }

  </script>

 <object ..// SWF File embedded> </object

 <form id="form1" runat="server">
 <asp:Login id="login1" OnAuthenticate="login1_Authenticate"/>
 </form>

 <form id="form" onsubmit="return false;">
 <input type="text" name="input" id="input" value="" runat="server" />
 <button id="btnInput"
        runat="server"
        causesvalidation="false"
        visible="true"
        style="width: 51px"
        onclick="sendToActionScript(this.form.input.value);"  >Send</button><br />
 </form>  


 // CODE BEHIND 

 protected void Login1_Authenticate(object sender, AuthenticateEventArgs e)
 {
   // do something to get User Id and Role
   //bind the string (user or role) to input.value
   //then call the HTML button onclick event to send it to SWF file.
   //which I could put in separate function and call from Login_Authenticate
 }

Can anyone help me I am out of ideas.

Craig

Answer 1

In your authenticate handler you need to inject some javascript onto the page that simply calls the sendToActionScript function with the appropriate value. You could, I suppose, click the button, but why introduce the extra overhead when you can simply call the method directly.

 this.ClientScript.RegisterStartupScript( this.GetType(), "sendtoactionscript",
        "<script type='text/javascript'>"
            + "sendToActionScript(this.form.input.value);"
            + "</script>" );

Note that I've split it into separate strings just for formatting purposes.

Answer 2

OnClick is a server side declaration of the event handler. Use onClientClick or do btnInput.Attributes.Add("onclick", "sendToActionScript(this.form.input.value);");

Answer 3

I ended up using Swfobject flashvars