title: How to bind a boolean value to checkboxcolumn datagrid WPF
body: <p>i'm working on a project at a company for school and I have to make a datagrid with ticketinformation: The id-number, description of a ticket.</p>
  
  <p>In my Tickettable in the database, I have a column 'Item' and it can have the values: "Not to be invoiced","To be invoiced" or "Offer". The 3rd column in the datagrid has to be a checkboxcolumn and my boss wants me that there is a possibility to check the checkbox, that means the ticket has to be invoiced, and when I uncheck, it means "not to be invoiced" or "offer", that doesn't really matter. My problem is when I bind the "ID" and "Description"-fields, I don't know how to bind the checkboxcolumn with a 'true or false' field? I only know how to bind tablefields from Ticket, but I want to add a boolean-field so I can determine in code when it's "to be invoiced", my boolean-field has to be true and when it's not to be invoiced, it has to be false, so unchecked.</p>
  
  <pre><code>dgTickets.DataContext = new List&lt;ISSUE&gt;(); 
  dgTickets.Columns.Add(new DataGridTextColumn { Header = "Id", Binding = new Binding("IM_ISSUE_NO") }); 
  dgTickets.Columns.Add(new DataGridTextColumn { Header = "Description", Binding = new Binding("IM_DESCRIPTION") }); 
  DataGridCheckBoxColumn chk = new DataGridCheckBoxColumn();
  chk.Header = "To be invoiced?";
  List&lt;ISSUE&gt; lTickets = new List&lt;ISSUE&gt;(); 
  lTickets = _ISSUEBO.getTickets(); 
  
  //here I want to make a list of booleans when the tickets are 'to be invoiced or not' in the database
  List&lt;bool&gt; lChecks = new List&lt;bool&gt;(); 
  int intTeller = 0; 
  bool boolFact = false;
  foreach (ISSUE i in lTickets) {
  switch (i.IM_ITEM_CODE) { 
  case "TO BE INVOICED": 
  boolFact = true; 
  break; 
  case "NOT TB INVOICED": 
  boolFact = false; 
  break; 
  case "OFFER":
  boolFact = false; 
  break; 
  default: break; 
  } 
  lChecks.Add(boolFact);
  intTeller++; 
  } 
  Binding b = new Binding("lChecks"); //??? this is probably wrong, but i don't know how to do
  chk.Binding = b;
  this.dgTickets.Columns.Add(chk); 
  dgTickets.ItemsSource = lTickets;
  </code></pre>
  
  <p>Can anyone help me please?</p>
  
  <p>Thanks in advance</p>