@g4naq,
It seems your VB.Net code is creating two <script>
blocks with separate window.onload
functions, causing the second chart (“ITU Zones”) to overwrite the first (“QSOs by Hour”), resulting in a blank first chart. To fix this, either combine the instantiation and render of both the charts within a single window.onload
function in one <script>
block, or place a single <script>
block without window.onload
at the end of the <body>
tag to execute after the DOM loads. Both approaches ensure both charts render correctly in your Windows Forms app’s WebBrowser control.
If the issue persists, kindly create sample project (sample / dummy data) reproducing the issue you are facing & share it with us via Google Drive or OneDrive so that we can run it at our end to understand the scenario better & help you out.
—
Vishwas R
Team CanvasJS