How to Deploy Custom Visual Webpart to SharePoint Online

hi,

I want to deploy Custom Visual Webpart to Office 365 , this custom Visual Webpart was developed for SharePoint 2010 and deployed as Farm Solution before so i want to use this same custom Visual Webpart and deploy it to SharePoint Online. below is the code of the Custom Visual Webpart

using System;
using System.ComponentModel;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using Microsoft.SharePoint;
using Microsoft.SharePoint.WebControls;
using System.Text;
using System.Web;
using System.Globalization;


namespace SandBoxSample.SampleWebpart
{
    public partial class SampleWebpartUserControl : UserControl
    {



        public partial class InnerPageContent : System.Web.UI.WebControls.WebParts.WebPart
        {
            #region Getting the value
            public InnerPageContent ParentWebPart
            {
                get;
                set;
            }
            #endregion
            protected void Page_Load(object sender, EventArgs e)
            {
                try
                {
                    SPQuery query = new SPQuery();
                    StringBuilder htmlTag = new StringBuilder();
                    string imgurl = string.Empty;
                    HttpRequest request = HttpContext.Current.Request;
                    string str = request.ServerVariables["SERVER_PROTOCOL"].Substring(0, request.ServerVariables["SERVER_PROTOCOL"].LastIndexOf('/')) + "://" + request.ServerVariables["SERVER_NAME"];

                    string pageUrl = this.Page.Request.Url.ToString();

                    using (SPSite rootSite = new SPSite(pageUrl))
                    {
                        using (SPWeb web = rootSite.OpenWeb())
                        {



                            query.Query = "<OrderBy><FieldRef Name=\"Modified\" Ascending=\"False\" /></OrderBy>";
                            SPList list = web.Lists.TryGetList(ParentWebPart.ListName.ToString());

                            SPListItemCollection itemColl = list.GetItems(query);
                            idTitle.InnerHtml = "<span class='style1'>" + itemColl[0][displayLanguage + "Title"].ToString() + "</span>";
                            tdInnerContent.InnerHtml = "<span class='content_text'>" + itemColl[0][displayLanguage + "Content"].ToString() + "</span>";

                        }
                    }

                }
                catch (Exception ex)
                {
                    // Response.Write(ex.Message);
                }
            }
        }
    }
}

using System;
using System.ComponentModel;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using Microsoft.SharePoint;
using Microsoft.SharePoint.WebControls;

namespace SandBoxSample.SampleWebpart
{
    [ToolboxItemAttribute(false)]
    public class SampleWebpart : WebPart
    {
        // Visual Studio might automatically update this path when you change the Visual Web Part project item.
        private const string _ascxPath = @"~/_CONTROLTEMPLATES/SandBoxSample/SampleWebpart/SampleWebpartUserControl.ascx";

        [WebBrowsable(true)]
        [WebDisplayName("List Name")]
        [WebDescription("List Name Detils")]
        [Personalizable(PersonalizationScope.User)]
        [Category("List Configuration")]
        public string ListName
        {
            get;
            set;
        }

        protected override void CreateChildControls()
        {
SampleWebpartUserControl control = (SampleWebpartUserControl)Page.LoadControl(_ascxPath);
            Control control = Page.LoadControl(_ascxPath);
            Controls.Add(control);
        }
    }
}

sal