如何防止在使用实体框架更新单列时将其他列值更改为表

这里我有一个方法在ASP。净MVC。我所做的是更新单列检查表的每一列不为空。如果为空，则IsModified属性更改为false。我必须为每一列写语句。

My Sample Method -

public int ServicesEdit(helplineservice _helplineservice)
        {
            int result = 0;
            try
            {
                db.Entry(_helplineservice).State = EntityState.Modified;
                if (string.IsNullOrEmpty(_helplineservice.description))
                {
                    db.Entry(_helplineservice).Property(p => p.description).IsModified = false;
                }
                else
                {
                    db.Entry(_helplineservice).Property(p => p.description).IsModified = true;
                }
                if (string.IsNullOrEmpty(_helplineservice.title))
                {
                    db.Entry(_helplineservice).Property(p => p.title).IsModified = false;
                }
                else
                {
                    db.Entry(_helplineservice).Property(p => p.title).IsModified = true;
                }
                if (string.IsNullOrEmpty(_helplineservice.contactnumber))
                {
                    db.Entry(_helplineservice).Property(p => p.contactnumber).IsModified = false;
                }
                else
                {
                    db.Entry(_helplineservice).Property(p => p.contactnumber).IsModified = true;
                }
                //if (string.IsNullOrEmpty(_helplineservice.active.ToString()))
                //{
                //    db.Entry(_helplineservice).Property(p => p.active).IsModified = false;
                //}
                //else
                //{
                //    db.Entry(_helplineservice).Property(p => p.active).IsModified = true;
                //}
                db.SaveChanges();
                result = 1;
            }
            catch (Exception ex)
            {
                result = 0;
            }
            return result;
        }

调用上述方法-

helplineservice _helplineservice = new helplineservice();
_helplineservice.helplineid =sectionid;
_helplineservice.allowedtoapp = allow;
result = _ftwCommonMethods.ServicesEdit(_helplineservice);

我认为这段代码看起来不符合逻辑。告诉我更好的方法。如何通过不写这么多代码来更新表的单列? Thanks in Advance.

var context = new DbContext();
// Load entity via whatever Id parameter you have.
var entityToUpdate = context.Set<Type>().FirstOrDefault(x => x.Id == idToUpdate);
if(entityToUpdate != null)
{
    entityToUpdate.Value1 = newValue1;
    entityToUpdate.Value2 = newValue2;
    context.SaveChanges();
}