Dev Center
How to create a thumbnail viewer
There isn’t a built-in thumbnail for Dynamic .NET TWAIN. To show the thumbnails, you can put two Dynamic .NET TWAIN Viewers on the form. Below is just one possible way to do this.
- Create the Viewers and bind it with ImageCore.
m_CoreForImageViewer = new ImageCore();
m_CoreForImageThum = new ImageCore();
dsViewer.Bind(m_CoreForImageViewer);
dsViewerThum.Bind(m_CoreForImageThum);
- Add a function to update the thumbnail view with the original view.
private void UpdateImageInfo()
{
if (m_CoreForImageThum.ImageBuffer.CurrentImageIndexInBuffer >= 0)
{
if (this.m_CoreForImageViewer.ImageBuffer.CurrentImageIndexInBuffer < 0)
{
m_CoreForImageViewer.IO.LoadImage(m_CoreForImageThum.ImageBuffer.GetBitmap(m_CoreForImageThum.ImageBuffer.CurrentImageIndexInBuffer));
}
else
{
m_CoreForImageViewer.ImageBuffer.SetBitmap(this.m_CoreForImageViewer.ImageBuffer.CurrentImageIndexInBuffer, m_CoreForImageThum.ImageBuffer.GetBitmap(m_CoreForImageThum.ImageBuffer.CurrentImageIndexInBuffer));
}
}
}
Note: you will need to update the image info whenever you load/edit/acquire the image.
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