Resource File to JavaScript Object

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Text;
using System.Collections;
using System.IO;

namespace ResourcesToJavaScript
{
    /// <summary>
    /// Represents a class that can be used to render a javascript object that contains resource keys and values
    /// of a specific resX file dependant on the CurrentUI culture.
    /// </summary>
    public abstract class ResourcesToJavaScriptBase : Control
    {
        /// <summary>
        /// Gets the full resX file path.
        /// </summary>
        /// <returns></returns>
        protected abstract string GetResXFilePath();

        /// <summary>
        /// Sets and Gets the generated JavaScript object name.
        /// </summary>
        public abstract string JavaScriptObjectName
        {
            get;
            set;
        }

        /// <summary>
        /// Get the resource value of specific key
        /// </summary>
        /// <param name="key"></param>
        /// <returns></returns>
        protected abstract string GetResourceValue(string key);

        protected virtual void ValidateBeforeRender(System.Web.UI.HtmlTextWriter writer)
        {
            if (!File.Exists(GetResXFilePath()))
            {
                writer.Write("GlobalResourcesToJavaScript: " + this.ClientID + ": Can't find the file " + GetResXFilePath());
                return;
            }
            return;
        }
        protected override void OnLoad(EventArgs e)
        {
            if (!string.IsNullOrEmpty(JavaScriptObjectName) && File.Exists(GetResXFilePath()) &&
                !Page.ClientScript.IsClientScriptBlockRegistered(GetType(), JavaScriptObjectName))
            {
                StringBuilder script = new StringBuilder();
                script.Append("<script type=\"text/javascript\"> ");
                using (System.Resources.ResXResourceReader resourceReader = new System.Resources.ResXResourceReader(GetResXFilePath()))
                {

                    script.Append(" var " + JavaScriptObjectName + " = { ");
                    bool first = true;
                    foreach (DictionaryEntry entry in resourceReader)
                    {
                        if (first)
                            first = false;
                        else
                            script.Append(" , ");

                        script.Append(NormalizeVariableName(entry.Key as string));
                        script.Append(":");
                        script.Append("'" + GetResourceValue(entry.Key as string) + "'");
                    }
                    script.Append(" }; </script>");
                    Page.ClientScript.RegisterClientScriptBlock(GetType(), JavaScriptObjectName, script.ToString(), false);

                }
            }

            base.OnLoad(e);
        }

        protected override void Render(HtmlTextWriter writer)
        {
            ValidateBeforeRender(writer);
            base.Render(writer);
        }

        /// <summary>
        /// Normalizes the variable names to be used as JavaScript variable names
        /// </summary>
        /// <param name="key"></param>
        /// <returns></returns>
        protected static string NormalizeVariableName(string key)
        {
            return key.Replace('.', '_');
        }
    }

}