In celldouble click event "Input string was not in a correct format." error is generated..

If you are going to use the Convert.ToInt32 method then you need to wrap that call in a try-catch so that you can capture and deal with that exception.The better and more preferred ways would be to use the Int32.Parse or TryParse methods as Wes has alluded to in his comment.The basic...

See these..you may find answer..http://social.msdn.microsoft.com/Forums/en/csharpgeneral/thread/d0c45c47-7f17-4fb1-8228-ac2b6750db58[^]http://msdn.microsoft.com/en-us/library/system.windows.forms.datagridview.celldoubleclick%28v=vs.85%29.aspx[^]

private void GridView_CellDoubleClick(object sender, DataGridViewCellEventArgs e) { UpdateDatabase ud = new UpdateDatabase(); ud.Controls["Fname_tbox"].Text = GridView.CurrentRow.Cells[0].Value.ToString(); ud.Show(); }