WPF - Operation is not valid while ItemsSource is in use.

Question

On wpf combobox DropdownClosed, I want to bind ListView.

 

private void cmbAction_DropDownClosed(object serder, EventArgs e)
      {
          int UserID = 26;
          string Actions = cmbAction.SelectedValue.ToString();
          var data = service.PostLogDetails(UserID);
          if (Actions == "Login")
          {
              var listItems = (from A in data orderby A.FirstName select new { Action = "Login", AccessDate = A.LogInTime });
              listView1.Items.Clear();
              listView1.ItemsSource = listItems;
          }
          else if (Actions == "Logout")
          {
              var listItems = (from A in data orderby A.FirstName select new { Action = "LogOut", AccessDate = A.LogOutTime });
              listView1.Items.Clear();
              listView1.ItemsSource = listItems;
          }
      }

After using this code, showing error.

"Operation is not valid while ItemsSource is in use. Access and modify elements with ItemsControl.ItemsSource instead."

How can I solve this?