Issue
I am trying to follow along with this post to show a PDF in a WebView2. I have set my WebView2 to dockstill "Fill", so it will use the entire space of the form.
The author recommends:
Dim html As String = "<!DOCTYPE html><html><head></head><body><div>" &
$"<iframe width=100% height=500 src=""data:Application/pdf;base64,{pdfBase64}"">" &
"</iframe></div></body></html>"
Me.WebView2.NavigateToString(html)
This works.
The PDF is displayed over the width of the webview / form and with 500 pixels in height.
However, I would like the iframe to be the size of the parent. To do that, I change "500" to "100%" like this:
Dim html As String = "<!DOCTYPE html><html><head></head><body><div>" &
$"<iframe width=100% height=100% src=""data:Application/pdf;base64,{pdfBase64}"">" &
"</iframe></div></body></html>"
This has no effect. Instead, the pdf that is shown in the iframe gets a height of 152 pixels.
What am I doing wrong?
Solution
Probably just invalid or at least not well-formatted HTML string. I'd suggest using the XElement syntax to build the HTML output, it helps to write the tags and attributes correctly...
Dim pdfBytes = 'The PDF byte array...
Dim pdfBase64 = Convert.ToBase64String(pdfBytes)
Dim html =
<html>
<body>
<iframe
width="100%"
height="100%"
src=<%= $"data:application/pdf;base64,{pdfBase64}" %>>
</iframe>
</body>
</html>.ToString()
WebView21.NavigateToString(html)
Nice VB.NET feature.
Answered By - dr.null Answer Checked By - David Marino (PHPFixing Volunteer)
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