sql - C# Textbox enters info but leaves a ' * ' in textbox -

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i have registration system, people scan barcodes , logs them in. barcodes hold unique number following '*'. when scan code enters listbox , clears remainder out of textbox, but, not clearing ' * '.

any ideas ? here chuck of code:

private void textbox1_keyup(object sender, keypresseventargs e)         {         object returnvalue;          string txtend = textbox1.text;         returnvalue = textbox1.text.replace(@"*", "");          if (e.keychar != '*') return;         {           if (listbox1.items.contains(returnvalue))            {              (int n = listbox1.items.count - 1; n >= 0; --n)               {                string removelistitem = returnvalue.tostring();                if (listbox1.items[n].tostring().contains(removelistitem))                {                 //listbox1.items.removeat(n);                }              }            }           else           listbox1.items.add(returnvalue);           textbox1.clear();           system.io.streamwriter sw = new system.io.streamwriter(fullfilename);           foreach (object item in listbox1.items)           sw.writeline(item.tostring());           sw.flush();           sw.close();           if (listbox1.items.count != 0) { disableclosebutton(); }           else           {             enableclosebutton();           }           label6.text = "currently " + listbox1.items.count.tostring() + " in attendance.";         }     }

after rereading question understood after processing '*' inserted empty textbox.

to stop handling of key event use statement:

e.handled = true;

this indicated event handled code , should not processed further.


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