visual studio 2010 - c# textbox to datagridview -


i want add exact value of textbox datagridview problem if add item last item add change. here print screen of sample problem..

1st try

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2nd try

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this code.

int n = datagridview3.rows.add();  (int j = 0; j < datagridview3.rowcount; j++)  {     if (datagridview3.rows[j].cells[1].value != null && (textbox4.text == datagridview3.rows[j].cells[4].value.tostring()))     {         messagebox.show("item on list!");         datagridview3.rows.remove(datagridview3.rows[n]);         return;     }     else      {         datagridview3.rows[j].cells[1].value = textbox43.text;         datagridview3.rows[j].cells[4].value = textbox4.text;         datagridview3.rows[j].cells[2].value = datetime.now.toshortdatestring();         datagridview3.rows[j].cells[3].value = datetimepicker3.text;                      datagridview3.firstdisplayedscrollingrowindex = n;         datagridview3.currentcell = datagridview3.rows[n].cells[0];         datagridview3.rows[n].selected = true;      } }

you looping on complete array , if not yet on list goes in else part of if. in block assign current entered values row, every single row have.

to fix separated check duplicates , add part more clearly.

do notice if have run through debugger , stepped on each line of code (hitting f10 in visual studio) have spotted bug easily. have @ blog scott guthrie (among others) http://weblogs.asp.net/scottgu/debugging-tips-with-visual-studio-2010

    // check if added 1     (int j = 0; j < datagridview3.rowcount; j++)      {         if (datagridview3.rows[j].cells[1].value != null && (textbox4.text == datagridview3.rows[j].cells[4].value.tostring()))         {             messagebox.show("item on list!");             return;         }      }       // lets add it!                  int n = datagridview3.rows.add();       datagridview3.rows[n].cells[1].value = textbox43.text;      datagridview3.rows[n].cells[4].value = textbox4.text;      datagridview3.rows[n].cells[2].value = datetime.now.toshortdatestring();      datagridview3.rows[n].cells[3].value = datetimepicker3.text;       datagridview3.firstdisplayedscrollingrowindex = n;      datagridview3.currentcell = datagridview3.rows[n].cells[0];      datagridview3.rows[n].selected = true;

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