private void FillDocumentDropdown(int catid, int subcatid, int?micId)
{
DataTable dtContact = new DataTable();
UserDetails objUserDetails = new UserDetails();
dtContact = objUserDetails.GetDocumentType(catid, subcatid, micId).Tables[0];
IList <Document> items = dtContact.AsEnumerable().Select(row =>
new Document
{
DocumentTypeId = row.Field <Int16>("DocumentTypeId"),
DocumentTypeName = row.Field <string>("DocumentTypeName")
}).ToList();
var list = new SelectList(items, "DocumentTypeId", "DocumentTypeName");
ViewData["DocumentId"] = list;
}