Question

I am inside of…

public class bgchange : IMapServerDropDownBoxAction {     void IServerAction.ServerAction(ToolbarItemInfo info)     {      Some code... 

and after ‘some code’ I want to trigger

[WebMethod] public static void DoSome() {  } 

Which triggers some javascript. Is this possible?

Ok, switch methods here. I was able to call dosome(); which fired but did not trigger the javascript. I have tried to use the registerstartupscript method but don’t fully understand how to implement it. Here’s what I tried:

public class bgchange : IMapServerDropDownBoxAction {  void IServerAction.ServerAction(ToolbarItemInfo info) {     ...my C# code to perform on dropdown selection...         //now I want to trigger some javascript...         // Define the name and type of the client scripts on the page.         String csname1 = 'PopupScript';         Type cstype = this.GetType();          // Get a ClientScriptManager reference from the Page class.         ClientScriptManager cs = Page.ClientScript;          // Check to see if the startup script is already registered.         if (!cs.IsStartupScriptRegistered(cstype, csname1))         {             String cstext1 = 'alert('Hello World');';             cs.RegisterStartupScript(cstype, csname1, cstext1, true);         } } 

}

I got the registerstartupscript code from an msdn example. Clearly I am not implementing it correctly. Currently vs says ‘An object reference is required for the non-static field, method, or property ‘System.Web.UI.Page.ClientScript.get’ refering to the piece of code ‘Page.Clientscript;’ Thanks.

Answer 1

I’m not sure I fully understand the sequence of what you are trying to do, what’s client-side and what’s not….

However, you could add a Start-up javascript method to the page which would then call the WebMethod. When calling a WebMethod via javascript, you can add a call-back function, which would then be called when the WebMethod returns.

If you add a ScriptManager tag on your page, you can call WebMethods defined in the page via Javascript.

<asp:ScriptManager ID='scriptManager1'      runat='server' EnablePageMethods='true' /> 

From the Page_Load function you can add a call to your WebMethod..

Page.ClientScript.RegisterStartupScript(     this.GetType(),      'callDoSome',     'PageMethods.DoSome(Callback_Function, null)',      true); 

Callback_Function represents a javascript function that will be executed after the WebMethod is called…

<script language='javascript' type='text/javascript'>     function Callback_Function(result, context) {         alert('WebMethod was called');     } </script> 

EDIT:

Found this link for Web ADF controls. Is this what you are using??

From that page, it looks like something like this will do a javascript callback.

public void ServerAction(ToolbarItemInfo info) {     string jsfunction = 'alert('Hello');';     Map mapctrl = (Map)info.BuddyControls[0];     CallbackResult cr = new CallbackResult(null, null, 'javascript', jsfunction);     mapctrl.CallbackResults.Add(cr); }