MONEY TEXTBOX WITH EMBEDED JAVASCRIPT

namespace WebControlLibrary1
{
    using System;
    using System.Collections.Generic;
    using System.ComponentModel;
    using System.Text;
    using System.Web.UI;
    using System.Web.UI.WebControls;
    using System.Globalization;

    [DefaultProperty("Text")]
    [ToolboxData("<{0}:MoneyTextBox runat=server>")]
    public class MoneyTextBox : TextBox
    {
        //ajouter cette ligne dans assembly info pour que le js soit inclu
        //[assembly: System.Web.UI.WebResource("WebControlLibrary1.Javascripts.Money.js", "text/js", PerformSubstitution = true)]

        /// <summary>
        /// Gets or sets the text content of the <see cref="T:System.Web.UI.WebControls.TextBox"/> control.
        /// </summary>
        /// <value></value>
        /// <returns>The text displayed in the <see cref="T:System.Web.UI.WebControls.TextBox"/> control. The default is an empty string ("").</returns>
        [Category("Appearance")]
        [Browsable(true)]
        public override string Text
        {
            get
            {
                return base.Text; 
            }
            set 
            { 
                base.Text = value;
            }
        }

        /// <summary>
        /// _errorMessage
        /// </summary>
        private string _errorMessage;

        /// <summary>
        /// Gets or sets the error message.
        /// </summary>
        /// <value>The error message.</value>
        [Category("Appearance")]
        [Browsable(true)]
        public string ErrorMessage
        {
            get { return _errorMessage; }
            set { _errorMessage = value; }
        }

        public event EventHandler<EventArgs> ValueChanged;

        protected override void OnInit(EventArgs e)
        {
            base.OnInit(e);
            //this.PreRender += new EventHandler(MoneyTextBox_PreRender);
            this.TextChanged += new EventHandler(txtMoney_TextChanged);
        }

        protected void txtMoney_TextChanged(object sender, EventArgs e)
        {
            if (ValueChanged != null)
                ValueChanged(this, EventArgs.Empty);
        }

        /// <summary>
        /// Registers client script for generating postback events prior to rendering on the client, if <see cref="P:System.Web.UI.WebControls.TextBox.AutoPostBack"/> is true.
        /// </summary>
        /// <param name="e">An <see cref="T:System.EventArgs"/> that contains the event data.</param>
        protected override void OnPreRender(EventArgs e)
        {
            string scriptName = "MoneyConverter";

            if (!Page.ClientScript.IsClientScriptBlockRegistered(scriptName))
            {
                //Attributes.Add("onChange", string.Format("test()"));
                Attributes.Add("onChange", string.Format("RegisterEvents(this)"));
                //Attributes.Add("onKeyPress", "return afterNumericTextKeyPress(event,this)");
                this.Page.ClientScript.RegisterClientScriptInclude(
                    this.GetType(),
                    "Testpp3",
                    Page.ClientScript.GetWebResourceUrl(this.GetType(),
                    "WebControlLibrary1.Javascripts.Money.js"));
            }

            base.OnPreRender(e);
        }

        public decimal Value
        {
            get
            {
                string strValue = Text.Trim(' ', '+', ' ');
                StringBuilder builder = new StringBuilder();
                foreach (char c in strValue)
                {
                    if (c == ' ')
                        continue;
                    if (Char.IsDigit(c) || c == '.')
                    {

                        builder.Append(c);
                    }
                    else if (c == ',')
                    {
                        builder.Append('.');
                    }
                    else
                    {
                        break;
                    }
                }
                decimal value;
                if (!decimal.TryParse(builder.ToString(), NumberStyles.AllowDecimalPoint, CultureInfo.InvariantCulture, out value))
                {
                    return 0;
                }
                return value;
            }
            set
            {
                Text = value.ToString("### ### ##0.00", CultureInfo.InvariantCulture).Replace(".", ",").Trim();
            }
        }

        public string InnerTexboxClientID
        {
            get
            {
                return this.ClientID;
            }
        }
    }
}