fyiReporting.RdlDesign.RdlEditPreview.tcEHP_SelectedIndexChanged C# (CSharp) Method

        private void tcEHP_SelectedIndexChanged(object sender, System.EventArgs e)
        {
            TabControl tc = (TabControl) sender;
            DesignTabs tag = (DesignTabs)tc.SelectedIndex;

            // Sync up the various pane whenever they switch so the editor is always accurate
            switch (_DesignChanged)
            {	// Sync up the editor in every case
                case DesignTabs.Design:
                    // sync up the editor
                    SetTextToScintilla(dcDesign.ReportSource);
                    break;
                case DesignTabs.Edit:
                case DesignTabs.Preview:
                    break;
            }

            // Below sync up the changed item
            if (tag == DesignTabs.Preview)
            {
                if (rdlPreview.SourceRdl != scintilla1.Text)			// sync up preview
                    this.rdlPreview.SourceRdl = scintilla1.Text;
            }
            else if (tag == DesignTabs.Design)
            {
                if (_DesignChanged != DesignTabs.Design)
                {
                    try
                    {
                        dcDesign.ReportSource = scintilla1.Text;
                    }
                    catch (Exception ge)
                    {
                        MessageBox.Show(ge.Message, Strings.RdlEditPreview_Show_Report);
                        tc.SelectedIndex = 1;	// Force current tab to edit syntax
                        return;
                    }
                }
            }

            _CurrentTab = tag;
            if (OnDesignTabChanged != null)
                OnDesignTabChanged(this, e);
        }