C1Combo RowTracking

C1Combo RowTracking

Posted by: r.trofymchuk on 7 December 2020, 11:38 am EST

• 

  r.trofymchuk

  • Post Options:
  • Link
    Copy
  • Jump To Answer

  Posted 7 December 2020, 11:38 am EST

  Hi,
  
  I’m using C1.Win.C1List.C1Combo.
  
  If I place this element on a form through the form designer and set the property RowTracking=true, the program works correctly and the value in the open list is highlighted, but if I add this element on a form through the code and set the property RowTracking=true, the highlighting does not work anymore:
  
  private void Form1_Load(object sender, EventArgs e)
  
  {
  
  C1.Win.C1List.C1Combo cd=new C1.Win.C1List.C1Combo();
  
  cd.RowTracking = true;
  
  this.Controls.Add(cd);
  
  DataTable dtCombo = new System.Data.DataTable();

          dtCombo.Columns.Add("Value");
                     for (int i = 0; i < 50000; i++)
          {
              dtCombo.Rows.Add(i.ToString());
  
          }
          cd.ColumnHeaders = false;
          cd.DataSource = dtCombo;
      } 
  

  What is the difference?

• 

  prabhat.sharma

  

  • Post Options:
  • Link
    Copy

  Posted 8 December 2020, 2:33 am EST

  Hi Mike,

  As per the developers, it’s an old limitation for this control, as a workaround: use BeginInit/EndInit methods.

  C1.Win.C1List.C1Combo cd = new C1.Win.C1List.C1Combo();
  cd.BeginInit();
  this.Controls.Add(cd);
  cd.RowTracking = true;
  DataTable dtCombo = new System.Data.DataTable();
  dtCombo.Columns.Add("Value");
  for (int i = 0; i < 50000; i++)
     {
      dtCombo.Rows.Add(i.ToString());
     }
  cd.ColumnHeaders = false;
  cd.DataSource = dtCombo;
  cd.EndInit();
  

  If you need any other help, please let us know.

  Regards,
  
  Prabhat Sharma.