hello,

i am using this file upload solution, i want as user attached file it should preview so there are 3 cases

1. Image - so bind image in image control as soon as user attached the image and before click on upload button so  user can see the preview

2. Video- so bind the video in html5 video control so user can see the preview before upload

3. File (word pdf ppt) in this case user can see the ICON that a file is attached.

 <style type="text/css">
        body
        {
            font-family: Arial;
            font-size: 10pt;
        }
    </style>
<input type="file" name="postedFile" />
<input type="button" id="btnUpload" value="Upload" />

<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
<progress id="fileProgress" style="display: none"></progress>
<hr />
<span id="lblMessage" style="color: Green"></span>
<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js"></script>
<script type="text/javascript">
    $("body").on("click", "#btnUpload", function () {
        $.ajax({
            url: '<%= ResolveUrl("~/HandlerCS.ashx")%>',
            type: 'POST',
            data: new FormData($('form')[0]),
            cache: false,
            contentType: false,
            processData: false,
            success: function (file) {
                $("#fileProgress").hide();
                $("#lblMessage").html("<b>" + file.name + "</b> has been uploaded.");
            },
            xhr: function () {
                var fileXhr = $.ajaxSettings.xhr();
                if (fileXhr.upload) {
                    $("progress").show();
                    fileXhr.upload.addEventListener("progress", function (e) {
                        if (e.lengthComputable) {
                            $("#fileProgress").attr({
                                value: e.loaded,
                                max: e.total
                            });
                        }
                    }, false);
                }
                return fileXhr;
            }
        });
    });
</script>

<%@ WebHandler Language="C#" Class="HandlerCS" %>

using System;
using System.IO;
using System.Net;
using System.Web;
using System.Web.Script.Serialization;
using socialnetworkingwebsite.Models;

public class HandlerCS : IHttpHandler
{
    smEntities db = new smEntities();
    public void ProcessRequest(HttpContext context)
    {
        //Check if Request is to Upload the File.
        if (context.Request.Files.Count > 0)
        {
            //Fetch the Uploaded File.
            HttpPostedFile postedFile = context.Request.Files[0];
            
            //Set the Folder Path.
            string folderPath = context.Server.MapPath("~/DynamicImages/");

            //Set the File Name.
            string fileName = Path.GetFileName(postedFile.FileName);
            
            //Save the File in Folder.
            postedFile.SaveAs(folderPath + fileName);

            //Send File details in a JSON Response.
            string json = new JavaScriptSerializer().Serialize(
                new
                {
                    name = fileName
                });
            context.Response.StatusCode = (int)HttpStatusCode.OK;
            context.Response.ContentType = "text/json";
            context.Response.Write(json);
            context.Response.End();
            
            
        }
    }

    public bool IsReusable
    {
        get
        {
            return false;
        }
    }
}