title: How to take part in excel files
body: <p>Hello sorry for my english.
  I have to select a row of a excel file, put any new data and save them.
  In the end I see that the excel file is always larger than before although the data are not increased but it looks to be created of the blank columns to the right.
  I think this because when I execute the following statement</p>
  
  <pre><code>var wb = openWorkBook(filename);
  var ws = wb.Worksheet("CNF");
  IXLRow row = ws.Row(device.Ordinal - 1 + FirstRow);
  for (int j = 0; j &lt; MAXCOLS; ++j)
  {
  IXLCell cell = row.Cell(j + FirstCol);
  ...}
  </code></pre>
  
  <p>as range goes from A1 to XFD1048576.
  Although after I take the line of my interest and cycle of 100 columns when I go</p>
  
  <pre><code>wb.Save();
  </code></pre>
  
  <p>the file increases.
  So I ask you if you have a method to take only a part of a file then for example take already suffered from a limited number of columns, starting from education <code>var ws = wb.Worksheet("CNF");</code>.</p>
  
  <p>Thank you</p>