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copied!<p>I'm not sure I fully understand the sequence of what you are trying to do, what's client-side and what's not....</p> <p>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.</p> <p>If you add a ScriptManager tag on your page, you can call WebMethods defined in the page via Javascript. </p> <pre><code><asp:ScriptManager ID="scriptManager1" runat="server" EnablePageMethods="true" /> </code></pre> <p>From the Page_Load function you can add a call to your WebMethod..</p> <pre><code>Page.ClientScript.RegisterStartupScript( this.GetType(), "callDoSome", "PageMethods.DoSome(Callback_Function, null)", true); </code></pre> <p>Callback_Function represents a javascript function that will be executed after the WebMethod is called... </p> <pre><code><script language="javascript" type="text/javascript"> function Callback_Function(result, context) { alert('WebMethod was called'); } </script> </code></pre> <p><b>EDIT:</b></p> <p>Found this link for <a href="http://edndoc.esri.com/arcobjects/9.2/NET_Server_Doc/developer/ADF/custom_tools_commands.htm" rel="nofollow noreferrer">Web ADF controls</a>. Is this what you are using??</p> <p>From that page, it looks like something like this will do a javascript callback.</p> <pre><code>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); } </code></pre>

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