How to hide the ribbon in a custom SharePoint page having a Visual Web part shown as pop up / Modal dialog in SharePoint 2013

Call the below mentioned function in Page Load function of the Web part to hide the ribbon row of the page if shown in pop up. This piece of code injects a css into the page to hide the ribbon row based on the way the page is displayed to the user. A query string  called IsDlg=1 is automatically added  by SharePoint if the page is displayed as pop up. This code checks for the availability of that query string and conditionally injects the code to the page.

Code to hide Ribbon Row

 private void HideRibbonOnDialog(Control clt)
 {
     if (clt.Page.Request.QueryString["IsDlg"] == "1")
     {
         LiteralControl lt = new LiteralControl(@"<style type='text/css'> #s4-ribbonrow{display:none !important;} </style>");
         lt.EnableViewState = false;
         clt.Controls.Add(lt);
     }
 }

Calling the code in Page Load of web part

  protected void Page_Load(object sender, EventArgs e)
 {
     HideRibbonOnDialog(this);
 }