How to raise Lost Focus event to a CustomTextBox

Question

User-313715986 posted

Hi everyone,

I'm created a CustomTextBox and I don't know how to raise Lost Focus event to it, I'm trying to use Leave Event but It's doen't work, here's my code:

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;
using System.Text;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Collections.Specialized;

namespace ASPServerControl
{
    [DefaultProperty("Text")]
    [ToolboxData("<{0}:CustomTextBox runat=server></{0}:CustomTextBox>")]
    public class CustomTextBox : WebControl, IPostBackDataHandler
    {

        public CustomTextBox() : base(HtmlTextWriterTag.Input) { }

        protected override void AddAttributesToRender(HtmlTextWriter writer)
        {
            writer.AddAttribute(HtmlTextWriterAttribute.Type, "Text");
            writer.AddAttribute(HtmlTextWriterAttribute.Value, Text);
            writer.AddAttribute("Name", this.UniqueID);

            base.AddAttributesToRender(writer);
        }


        //Text Attribute
        [Bindable(true)]
        [Category("Appearance")]
        [DefaultValue("")]
        [Localizable(true)]
        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.Write(Text);
        }

        public bool LoadPostData(string postDataKey, NameValueCollection postData)
        {
            string newValue = postData[postDataKey];

            string oldValue = Text;

            if (oldValue != newValue)
            {
                Text = newValue;
                return true;
            }
            else
            {
                return false;
            }
        }


        public event EventHandler TextUpdated;

        public void RaisePostDataChangedEvent()
        {
            OnTextUpdated(new EventArgs());
        }

        protected virtual void OnTextUpdated(EventArgs e)
        {
            if (TextUpdated != null)
            {
                TextUpdated(this, e);
            }
        }

    }
}