Hide and Show Annotations in C# Windows Application

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Hide and Show Annotations in C# Windows Application

Post by dixit.patel1 » Fri Mar 08, 2024 04:58 AM

Hi,

How to Hide and Show Annotations in C# Windows Application.

I am using ReferencedImageAnnotationView and HighlightAnnotationView in Annotations.

Re: Hide and Show Annotations in C# Windows Application

Post by Alex » Fri Mar 08, 2024 01:02 PM

Hi,

You can show/hide Vintasoft annotation in Windows desktop application (WinForms/WPF) using the AnnotationView.IsVisible property.

Best regards, Alexander

Re: Hide and Show Annotations in C# Windows Application

Post by dixit.patel1 » Mon Mar 11, 2024 06:45 AM

Hi,

I am trying below Code but not working hide and show annotations.

AnnotationDataController objAnnotationDataController = new AnnotationDataController(AnnotationViewer.Images);
AnnotationDataCollection objAnnotationDataCollection = objAnnotationDataController[annotationViewer1.FocusedIndex];
if (cbHideShowAnnotation.Text == "Hide")
{
       if (objAnnotationDataCollection.Count > 0)
       {
               for (int i = 0; i < objAnnotationDataCollection.Count; i++)
               {
                      if (objAnnotationDataCollection[i].Name == "I10")
                      {
                          objAnnotationDataCollection[i].IsVisible = false;
                      }
               }
        }
}

Re: Hide and Show Annotations in C# Windows Application

Post by Alex » Mon Mar 11, 2024 04:54 PM

Hi,

Your code is not correct because you are creating new instance of AnnotationDataController class but you must use existing AnnotationDataController from AnnotationViewer.

Here is correct code:

AnnotationDataController objAnnotationDataController = AnnotationViewer.AnnotationDataController;
AnnotationDataCollection objAnnotationDataCollection = objAnnotationDataController[annotationViewer1.FocusedIndex];
if (cbHideShowAnnotation.Text == "Hide")
{
       if (objAnnotationDataCollection.Count > 0)
       {
               for (int i = 0; i < objAnnotationDataCollection.Count; i++)
               {
                      if (objAnnotationDataCollection[i].Name == "I10")
                      {
                          objAnnotationDataCollection[i].IsVisible = false;
                      }
               }
        }
}

Best regards, Alexander

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