How to remove hours minuts seconds in caliculated days ...asp.net, C#

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C#

ASP.NET

LINQ

I am was create one Gridview table through code behind,
In the Gridview table one column is for days counting from between two dates,
For the columns formate i wrote code in RowDataBound,
so in that Days column format is not converting,
It was showing Days.HH MM SS FFF also

pls. any one help me ..

What I have tried:

protected void Page_Load(object sender, EventArgs e)
    {
       // Gridview Data binding 
        DataClassesDataContext db = new DataClassesDataContext();
          var sumo = from i in db.Chech_ins
                     let Dys = DateTime.Now - i.IN_Date
                     select new
                   {   Gues_Name = i.Room_num,
                       IN_Date= i.IN_Date, 
                       Today_Date=DateTime.Now,
                       Days = Dys,
                       Total = i.Tariff * 2,
                   };
        GridView1.DataSource = sumo;
        GridView1.DataBind();
    
    }



protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
    {

       // for change the column formate
        if (e.Row.RowType == DataControlRowType.DataRow)
        {
    
            e.Row.Cells[1].Text = Convert.ToDateTime(e.Row.Cells[1].Text).ToString("dd-MM-yyyy");
            e.Row.Cells[2].Text = Convert.ToDateTime(e.Row.Cells[2].Text).ToString("dd-MM-yyyy");
            e.Row.Cells[3].Text = double.Parse(e.Row.Cells[3].Text).ToString();
            e.Row.Cells[4].Text = Convert.ToInt32(e.Row.Cells[4].Text).ToString();
        }
    }