>>>Hi,
>>>If Naomi has access to the biz layer source then, yes I'd agree, a better solution.
>>>An alternative with wider use might be to add a .ToNullableInt() extension method for String.
>>>Best,
>>>Viv
>>>
>>I do have an access to BL, so I may code it there. For the extension method I haven't done them yet, so I'm not sure how to implement it.
>
>The Extension method would be something like:

public static int? ToNullableInt(this string s)
>{
>    int result;
>    bool b = Int32.TryParse(s,out result);
>    return b ? (int?) result : null;
>}

Then anywhere this method is in scope you could use, for example:

string s = "12345";
>int? i = s.ToNullableInt();

Note the above implementation would return null for any string that doesn't translate to a valid int (null, string.empty, "123.45", "asd" etc.) which may no be exactly what you want. And I wouldn't bother to implement this unless you know it will have a wider use than in your original requirement....
>Best,
>Viv

Where exactly should I place this code?

I'm getting an error here right now

System.NullReferenceException was unhandled
Message="NullReferenceException"
StackTrace:
at IOTechno.SDC.Business.InventoryBiz.Find(String ItemNo, String description)
at IOTechno.SDC.Windows.OrdersEntryForm.DisplayItemInfo(String ItemNo)
at IOTechno.SDC.Windows.OrdersEntryForm.txtItemNo_LostFocus(Object sender, EventArgs e)
at System.Windows.Forms.Control.OnLostFocus(EventArgs e)
at System.Windows.Forms.Control.WnProc(WM wm, Int32 wParam, Int32 lParam)
at System.Windows.Forms.Control._InternalWnProc(WM wm, Int32 wParam, Int32 lParam)
at Microsoft.AGL.Forms.EVL.EnterMainLoop(IntPtr hwnMain)
at System.Windows.Forms.Application.Run(Form fm)
at IOTechno.SDC.Windows.Main.BDMain.Main()

The code is

  public InventoryDS.ItemsDataTable Find(string ItemNo, string description)  
        {
            if (ItemNo.Equals(string.Empty))
            { ItemNo = null; }

            if (description.Equals(string.Empty))
            { description = null; }
 
            ItemsTableAdapter ta = new ItemsTableAdapter ();             
            return ta.GetInventory(ItemNo, description);
        }

and I call it with oBiz.Find(ItemNo, null)