It is possible that error is caused by different versions of Excel Interop assemblies. Anyway, you should try to avoid Excel Interop. I use GemBox.Spreadsheet .NET Excel component for generating reports in my company. Here is an example how to import/export DataGrid to Excel using GemBox.Spreadsheet.

thanks, this add all the contents of DatagriView , no the Header Text of column , .... RGDS ! s_mostafa_h

thanks a lot for ur reply ! what things we can do with Java ? some friends talk about the power of c++ . what's i search about this is for e.g. making a simple application can remove the Password of cell phone when a user forgot it for Some Symbian OS or ...? thanx a lot ! s_mostafa_h

You're welcome, but please in the future spend a good 10-20 minutes googling your query and reading the results. If that doesn't work, post to the forums. Till the next time :) "Every time Lotus Notes starts up, somewhere a puppy, a kitten, a lamb, and a baby seal are killed. Lotus Notes is a conspiracy by the forces of Satan to drive us over the brink into madness. The CRC-32 for each file in the installation includes the numbers 666." Gary Wheeler "You're an idiot." John Simmons, THE Outlaw programmer "I realised that all of my best anecdotes started with "So there we were, pissed". Pete O'Hanlon

And see www.cplusplus.com.

only J2ME , even for tools programm .as u know , all mobiles don't support some languages ... .making menu for these languages is necessary for use them . thanx s_mostafa_h

thx for ur reply, but my means is , I want to make a tools application that i can transfer or erase file from cell phone by this application for example . or if any file on this device destroyed or ... i can add some flash files to this device ....by this application . thx in advance s_mostafa_h

it's help me , thanks in advance ! Yours ,;) s_mostafa_h

Use a BindingNavigator component, no need to reinvent the wheel ;) hope this helps...

Nader Elshehabi wrote: You shouldn't dispose your connection until you don't need it anymore in the current session. If you want to clear you DataGridView -as I understood from your reply-, then you should call the DataGridView.Rows.Clear() method before filling it again. This is what I was getting at - sorry for the lack of detail.

it's better to forgot it ... s_mostafa_h

is there any help ?..... s_mostafa_h

you can build all names in to a string, like this: name1,name2,name3 then split it in crystal report formula editor? I am not sure which manner you used in crystal report. if you can't split it. I have no idea. may be you need contact crystal report support to solve your problem?