Xamarin Android 将 webview 保存为 pdf

Question

I'm developing an app in xamarin for android.

The objective is for the user to fill a document and save it as a PDF.

I have tried this process:

HTML TO PDF

I have designed a cshtml file, that contains the same structure as the document, with the input that the user inserted. So far so good, it looks good in the webview. I now wish to convert this to PDF but I can't seem to find a way to convert it.

Is there a way to convert CSHTML to PDF, or somehow convert the content of the webview to PDF?

I have tried an extension called "iTextSharp" to create and manipulate PDF's (my attempt to convert html to a PDF file but the styles and images used in html aren't being applied).

The final objective is to create a PDF file that has the same structure as an HTML Page that I own.

Any way I can accomplish this? Ideas are most welcome

Answer 1

I could convert the whole WebView page content to pdf with below code. Hope it may help you. However, I have just tried this in Simulator.

[Activity(Label = "DroidWebview", MainLauncher = true, Icon = "@mipmap/icon")]
public class MainActivity : Activity
{
    WebView myWebView;
    protected override void OnCreate(Bundle savedInstanceState)
    {
        base.OnCreate(savedInstanceState);

        // Set our view from the "main" layout resource
        SetContentView(Resource.Layout.Main);

        myWebView = FindViewById<WebView>(Resource.Id.webview);
        myWebView.Settings.JavaScriptEnabled = true;
        myWebView.SetWebViewClient(new MyWebViewClient());

        myWebView.LoadUrl("https://stackoverflow.com/questions/46978983/xamarin-android-save-webview-in-pdf");

        Button myPrintButton = FindViewById<Button>(Resource.Id.myPrintButton);
        myPrintButton.Click += (sender, e) =>
        {
            var printManager = (PrintManager)GetSystemService(PrintService);
            string fileName = "MyPrint_" + Guid.NewGuid().ToString() + ".pdf";
            var printAdapter = myWebView.CreatePrintDocumentAdapter(fileName);
            PrintJob printJob = printManager.Print("MyPrintJob", printAdapter, new PrintAttributes.Builder().Build());
        };
    }
}

public class MyWebViewClient : WebViewClient
{
    public override bool ShouldOverrideUrlLoading(WebView view, string url)
    {
        view.LoadUrl(url);
        return false;
    }
}