radtextbox avoid object throwing Object reference not set to an instance of an object

Question

Which is a better code to avoid throwing Object reference not set to an instance of an object when using Telerik Radtextbox? Are both codes below the same? Can I set a default value to avoid nullreference from throwing?

protected void btnAddSAles_click(object sender, EventArgs e)        
{  
   string orderName = Ordername.Text;
}

or

protected void btnAddSAles_click(object sender, EventArgs e)        
{    
   TextBox b = item.FindControl("Ordername") as TextBox;            
   string box1 = b.text;            
}

Answer 1

I am assuming FindControl is returning null from the as cast you're trying to make. I assume (again) it isn't finding a control named Ordername, hence you are trying to access a Text property on a null object, which causes the NullReferenceException.

What you should do is:

1. Check why there is no control named Ordername, as im assuming there should be one

2. If the control which invoked the Button.Click may not always be a TextBox object, add a nullity check:

   protected void btnAddSAles_click(object sender, EventArgs e)        
   {    
      TextBox b = item.FindControl("Ordername") as TextBox;      
      if (b != null)
      {      
         string box1 = b.text;
      }           
   }