BeginUpdate Method

using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.MedicalViewer; 
 
class MedicalViewerForm : Form 
{ 
   private MedicalViewer _medicalViewer; 
   private Button applyEffects; 
 
   void MedicalViewerForm_SizeChanged(object sender, EventArgs e) 
   { 
      _medicalViewer.Size = new Size(this.ClientRectangle.Right - 30, this.ClientRectangle.Bottom); 
   } 
 
   public MedicalViewerForm() 
   { 
      RasterCodecs _codecs = new RasterCodecs(); 
      RasterImage _image; 
 
      this.SizeChanged += new EventHandler(MedicalViewerForm_SizeChanged); 
 
      // Create the medical viewer and adjust the size and the location. 
      _medicalViewer = new MedicalViewer(1, 2); 
      _medicalViewer.Location = new Point(30, 0); 
      _medicalViewer.Size = new Size(this.ClientRectangle.Right - 30, this.ClientRectangle.Bottom); 
 
      // Load an image and then add it to the control. 
      _image = _codecs.Load(Path.Combine(LEAD_VARS.ImagesDir,"xa.dcm")); 
      MedicalViewerMultiCell cell = new MedicalViewerMultiCell(_image, true, 1, 1); 
      _medicalViewer.Cells.Add(cell); 
 
      // add some actions that will be used to change the properties of the images inside the control. 
      cell.AddAction(MedicalViewerActionType.WindowLevel); 
      cell.AddAction(MedicalViewerActionType.Alpha); 
      cell.AddAction(MedicalViewerActionType.Offset); 
 
      // assign the added actions to a mouse button, meaning that when the user clicks and drags the mouse button, the associated action will be activated. 
      cell.SetAction(MedicalViewerActionType.WindowLevel, MedicalViewerMouseButtons.Left, MedicalViewerActionFlags.Active); 
      cell.SetAction(MedicalViewerActionType.Alpha, MedicalViewerMouseButtons.Middle, MedicalViewerActionFlags.Active); 
      cell.SetAction(MedicalViewerActionType.Offset, MedicalViewerMouseButtons.Right, MedicalViewerActionFlags.Active); 
 
      // adjust some properties of the cell and add some tags. 
      _medicalViewer.Cells[0].SetTag(2, MedicalViewerTagAlignment.TopLeft, MedicalViewerTagType.UserData, "EX. ID 230-36-5448"); 
      _medicalViewer.Cells[0].SetTag(4, MedicalViewerTagAlignment.TopLeft, MedicalViewerTagType.Frame); 
      _medicalViewer.Cells[0].SetTag(6, MedicalViewerTagAlignment.TopLeft, MedicalViewerTagType.Scale); 
      _medicalViewer.Cells[0].SetTag(2, MedicalViewerTagAlignment.BottomLeft, MedicalViewerTagType.WindowLevelData); 
      _medicalViewer.Cells[0].SetTag(1, MedicalViewerTagAlignment.BottomLeft, MedicalViewerTagType.FieldOfView); 
 
      // Load another image and then add it to the control. 
      _image = _codecs.Load(Path.Combine(LEAD_VARS.ImagesDir,"mr.dcm")); 
      _medicalViewer.Cells.Add(new MedicalViewerMultiCell(_image, true, 2, 2)); 
 
      // adjust some properties of the cell and add some tags. 
      _medicalViewer.Cells[1].SetTag(2, MedicalViewerTagAlignment.TopLeft, MedicalViewerTagType.UserData, "EX. ID 230-36-5448"); 
      _medicalViewer.Cells[1].SetTag(4, MedicalViewerTagAlignment.TopLeft, MedicalViewerTagType.Frame); 
      _medicalViewer.Cells[1].SetTag(6, MedicalViewerTagAlignment.TopLeft, MedicalViewerTagType.Scale); 
      _medicalViewer.Cells[1].SetTag(2, MedicalViewerTagAlignment.BottomLeft, MedicalViewerTagType.WindowLevelData); 
      _medicalViewer.Cells[1].SetTag(1, MedicalViewerTagAlignment.BottomLeft, MedicalViewerTagType.FieldOfView); 
 
 
      applyEffects = new Button(); 
      applyEffects.Location = new Point(0, 0); 
      applyEffects.Size = new Size(30, 15); 
      applyEffects.Text = "Apply Effects"; 
      applyEffects.Click += new EventHandler(applyEffects_Click); 
 
      Controls.Add(_medicalViewer); 
      _medicalViewer.Dock = DockStyle.Fill; 
      Controls.Add(applyEffects); 
   } 
 
   void applyEffects_Click(object sender, EventArgs e) 
   { 
      MedicalViewer medicalViewer = (MedicalViewer)_medicalViewer; 
      MedicalViewerMultiCell cell = (MedicalViewerMultiCell)(medicalViewer.Cells[0]); 
      MedicalViewerMultiCell cell1 = (MedicalViewerMultiCell)(medicalViewer.Cells[1]); 
 
      DialogResult result = MessageBox.Show(@"This demo will do some effects on the Medical viewer, Do you want to use the begin and update update?", "Begin Update And End Update Demo", MessageBoxButtons.YesNo); 
 
      if (result == DialogResult.Yes) 
         medicalViewer.BeginUpdate(); 
 
      cell.SetTag( 8, 0,  MedicalViewerTagAlignment.TopLeft, MedicalViewerTagType.UserData, "Sub Cell Tag 1"); 
      cell.SetTag( 0, 8,  MedicalViewerTagAlignment.TopLeft, MedicalViewerTagType.UserData, "Sub Cell Tag 2"); 
      cell1.SetTag( 1, 9,  MedicalViewerTagAlignment.TopLeft, MedicalViewerTagType.UserData, "Sub Cell Tag 3"); 
      cell1.SetTag( 2, 10, MedicalViewerTagAlignment.TopLeft, MedicalViewerTagType.UserData, "Sub Cell Tag 4"); 
      cell1.SetTag( 3, 11, MedicalViewerTagAlignment.TopLeft, MedicalViewerTagType.UserData, "Sub Cell Tag 5"); 
 
      cell.Rows = 3; 
      cell.Columns = 3; 
      cell.FitImageToCell = false; 
 
 
 
      MedicalViewerTagInformation tagInformation = new MedicalViewerTagInformation(); 
 
      tagInformation.Alignment = MedicalViewerTagAlignment.BottomLeft; 
      tagInformation.Position = 3; 
      tagInformation.Text = "Edit Text 1"; 
 
 
      cell.EditTag(8, 0, MedicalViewerTagAlignment.TopLeft, tagInformation); 
 
 
      tagInformation = new MedicalViewerTagInformation(); 
      tagInformation.Type = MedicalViewerTagType.Scale; 
 
      cell.EditTag(8, 0, MedicalViewerTagAlignment.BottomLeft, tagInformation); 
 
 
      cell.DeleteTag(0, 8, MedicalViewerTagAlignment.TopLeft); 
 
      // Shift the second row, one row down 
      tagInformation = cell.GetTag(2, 10, MedicalViewerTagAlignment.TopLeft); 
             
      tagInformation.Position += 1; 
 
      cell.EditTag(2, 10, MedicalViewerTagAlignment.TopLeft, tagInformation); 
 
      // Shift the second row, one row down 
      tagInformation = cell.GetTag(2, MedicalViewerTagAlignment.TopLeft); 
 
      tagInformation.Text = "Edited sub-cell Tag1"; 
      cell.EditTag(2, MedicalViewerTagAlignment.TopLeft, tagInformation); 
 
      cell.DeleteTag(4, MedicalViewerTagAlignment.TopLeft); 
 
      MedicalViewerWindowLevel windowLevelProperties = (MedicalViewerWindowLevel)cell.GetActionProperties(MedicalViewerActionType.WindowLevel, 0); 
 
      windowLevelProperties.Width = 20; 
      windowLevelProperties.Center = 50; 
 
      cell.SetActionProperties(MedicalViewerActionType.WindowLevel, windowLevelProperties); 
 
 
      double scale = cell.GetScale(0); 
 
      scale *= 2; 
 
      cell.SetScale(-1, scale); 
 
      cell1.SetScale(0, scale); 
 
      MedicalViewerScaleMode scaleMode = cell.GetScaleMode(0); 
 
      if (scaleMode == MedicalViewerScaleMode.Normal) 
         scaleMode = MedicalViewerScaleMode.Fit; 
      else 
         scaleMode = MedicalViewerScaleMode.Normal; 
 
      cell.SetScaleMode(scaleMode); 
 
      if (result == DialogResult.Yes) 
         medicalViewer.EndUpdate(); 
 
   } 
 
   public MedicalViewer Viewer 
   { 
      get { return _medicalViewer; } 
   } 
} 
 
MedicalViewerForm GetMedicalControl() 
{ 
   return new MedicalViewerForm(); 
} 
 
// This example creates a medical viewer control and two cells. when you click on the button it will ask you whether to apply some effects on the cell with or without using BeginUpdate/EndUpdate. Run this sample twice and see the difference 
public void MedicalViewerTagInformationExample() 
{ 
   MedicalViewerForm myForm = GetMedicalControl(); 
   MedicalViewer medicalViewer = myForm.Viewer; 
 
   myForm.ShowDialog(); 
} 
 
static class LEAD_VARS 
{ 
   public const string ImagesDir = @"C:\LEADTOOLS22\Resources\Images"; 
}