WebView2 fit to page

DanM55 0

I am using a WebView2 control in a WinForms app. It is working fine. However, I'd like the "Fit to Page" button sizing to be the default when a PDF file is displayed in the WebView2 control. How do I make this the default setting in my VB.net code?

1 answer

Jiachen Li-MSFT 26,751 Reputation points Microsoft Vendor

2024-04-29T07:42:31.4333333+00:00

Hi @DanM55 ,

You can setting the zoom level to "Fit to Page" by default by executing JavaScript code once the WebView2 control is initialized.

webView21.CoreWebView2.ExecuteScriptAsync("document.body.style.zoom = 'fit-to-width';")

Best Regards.

Jiachen Li

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DanM55 0 Reputation points

2024-04-29T20:17:42.2033333+00:00

I am using VB.NET with a WinForms application. I put a WebView2 control on my main form, and then I use the Source property in an event handler to display a PDF file. I'm not using CoreWebView2 async. Can I still use the JavaScript statement you suggest?

Jiachen Li-MSFT 26,751 Reputation points Microsoft Vendor

2024-04-30T02:11:47.8933333+00:00

You can use WebView2.ExecuteScriptAsync(String) Method in WebView2.NavigationCompleted Event to executes the script.

DanM55 0 Reputation points

2024-04-30T13:33:45.44+00:00

I tried that but it doesn't seem to changing anything. I tried changing "fit-to-width" to "50%". I also changed "zoom = 'fit-to-width'" to "transform = scale(0.5)" without any change either. I'm using WebView2 to display a PDF file, not a web URL. Does that make a difference?

Jiachen Li-MSFT 26,751 Reputation points Microsoft Vendor

2024-05-01T08:59:23.4433333+00:00

Hi @DanM55 ,

Yes, displaying a PDF file using WebView2 does indeed introduce some differences compared to loading a web URL. WebView2 handles PDF files differently because it uses its own built-in PDF viewer rather than rendering them as HTML content.
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