Bind dropdown with selected value during edit time in MVC

Question

Controller//

 

ViewBag.ddlprincepal = new SelectList(objentity.ddlPrincipal(), "PrincipalID", "PrincipalName");

ViewBag.ddlprincepalselected = new SelectListItem { Text = inventoryDetailobj[0].PrincipalName, Value = (inventoryDetailobj[0].PrincipalID).ToString(),Selected=true };

 

View

// 

 

@Html.DropDownList("ddlprincepal",ViewBag.ddlprincepal as SelectList ,ViewBag.ddlprincepalselected as string , new { @id = "ddlprincepal" })