I am trying to run an example from ASP.Net Professional 2.0 which includes a javascipt file using RegisterClientScriptResource. When I run this example, I get the following error message in the browser:

  'CallbackHandler' is undefined. This handler is defined in the javascript include file. Looks like my file is not being included in the assembly. Here is the code. Any suggestions:


Control Code:
namespace WebControlLibrary1
{

    [DefaultProperty("Text")]
    [ToolboxData("<{0}:WebCustomControl1 runat=server></{0}:WebCustomControl1>")]
    public class WebCustomControl1 : WebControl, ICallbackEventHandler
    {
        [Bindable(true)]
        [Category("Appearance")]
        [DefaultValue("")]
        [Localizable(true)]
        [Themeable(false)]
        public string Text
        {
            get
            {
                String s = (String)ViewState["Text"];
                return ((s == null) ? String.Empty : s);
            }

            set
            {
                ViewState["Text"] = value;
            }
        }

        protected override void RenderContents(HtmlTextWriter output)
        {
            output.RenderBeginTag(HtmlTextWriterTag.Div);

            output.AddAttribute(HtmlTextWriterAttribute.Type, "text");
            output.AddAttribute(HtmlTextWriterAttribute.Id, this.ClientID);
            output.AddAttribute(HtmlTextWriterAttribute.Name, String.Concat(this.ClientID, "zz"));
            output.AddAttribute(HtmlTextWriterAttribute.Value, this.Text);
            output.AddAttribute("OnBlur", "ClientCallback()");
            output.RenderBeginTag(HtmlTextWriterTag.Input);
            AddAttributesToRender(output);

            output.RenderEndTag();
            output.RenderEndTag();
        }

        protected override void OnPreRender(EventArgs e)
        {
            Page.ClientScript.RegisterClientScriptResource(thi s.GetType(), "Utility.js");
            Page.ClientScript.RegisterClientScriptBlock(
                typeof(Page),
                "ClientCallback",
                "function ClientCallback() {" +
                "args = document.getElementById('" + this.ClientID + "').Value;" +
                Page.ClientScript.GetCallbackEventReference(this, "args", "CallbackHandler", null, "ErrorHandler", true) + "}",
                true);

        }

        public void RaiseCallbackEvent(string eventArguments)
        {
            int result;
            if (!Int32.TryParse(eventArguments, out result))
            {
                throw new Exception("The method or operation not implemented");
            }
        }

        public string GetCallbackResult()
        {
            return "Valid Data";
        }
    }
}

AssemblyInfo.cs file:

using System.Reflection;
using System.Runtime.CompilerServices;
using System.Runtime.InteropServices;


// General Information about an assembly is controlled through the following
// set of attributes. Change these attribute values to modify the information
// associated with an assembly.
[assembly: AssemblyTitle("WebControlLibrary1")]
[assembly: AssemblyDescription("")]
[assembly: AssemblyConfiguration("")]
[assembly: AssemblyCompany("")]
[assembly: AssemblyProduct("WebControlLibrary1")]
[assembly: AssemblyCopyright("Copyright © 2007")]
[assembly: AssemblyTrademark("")]
[assembly: AssemblyCulture("")]

// Setting ComVisible to false makes the types in this assembly not visible
// to COM components. If you need to access a type in this assembly from
// COM, set the ComVisible attribute to true on that type.
[assembly: ComVisible(false)]

// The following GUID is for the ID of the typelib if this project is exposed to COM
[assembly: Guid("3dbd1c3c-64f0-480c-9544-051f28a9540b")]

// Version information for an assembly consists of the following four values:
//
// Major Version
// Minor Version
// Build Number
// Revision
//
// You can specify all the values or you can default the Revision and Build Numbers
// by using the '*' as shown below:
[assembly: AssemblyVersion("1.0.*")]
[assembly: AssemblyFileVersion("1.0.0.0")]
[assembly: System.Web.UI.WebResource("WebControlLibrary1.Util ity.js", "text/javascript")]


Utility.cs File:
This file is in the root folder of the project.

// JScript File
var args;
var ctx;

function ValidateText(ctl)
{
    if (ctl.value=='') {
        alert('Please enter a value.');
        ctl.focus();
    }
}

function CallbackHandler(args,ctx)
{
    alert("The data is valid");
}

function ErrorHandler(args,ctx)
{
    alert("Please enter a number");
}

Are you compiling the Utility.js file as an embedded resource? Is it in the root directory of the project?

/- Sam Judson : Wrox Technical Editor -/

Thanks, Sam.

Are you compiling the Utility.js file as an embedded resource?
    I am doing nothing special but do a regular build. How do I compile the file as an embedded resource. I have defined it as web resource in the Assembly file.

Is it in the root directory of the project?
 Yes. The include file is in the roo directory of the project.

If you select the file in the Solution Explorer and look at its properties on of them should read "Compile Action" or something. It will probably have a value of "Content". Change that to "Embed Resource" and try again.


/- Sam Judson : Wrox Technical Editor -/

Hi Sam, I have changed the Utility.js to be an embedded resource. I still get the same error. Any more suggestions?

You've used 'WebControlLibrary1.Utility.js' in one place and 'utility.js' in another. I think they should both be the same...(and I'd recommend 'WebControlLibrary1.Utility.js').

/- Sam Judson : Wrox Technical Editor -/