aimore/PdfConverteriOS.cs

## PdfConverteriOS.cs
using System;
using System.Drawing;
using System.IO;
using CatCatalog.iOS.Services;
using CatCatalog.Services;
using CoreGraphics;
using Foundation;
using UIKit;
using Xamarin.Forms;

[assembly: Dependency(typeof(PdfConverter))]
namespace CatCatalog.iOS.Services
{
    public class PdfConverter : IPdfConverter
    {
        public string SafeHTMLToPDF(string html, string filename)
        {
            UIWebView webView = new UIWebView(new CGRect(0, 0, 6.5 * 72, 9 * 72));

            html = @"<!doctype html>
<html>
<head>
    <meta charset=""utf-8"">
    <title>A simple, clean, and responsive HTML invoice template</title>

    <style>
    .invoice-box {
        max-width: 800px;
        margin: auto;
        padding: 30px;
        border: 1px solid #eee;
        box-shadow: 0 0 10px rgba(0, 0, 0, .15);
        font-size: 16px;
        line-height: 24px;
        font-family: 'Helvetica Neue', 'Helvetica', Helvetica, Arial, sans-serif;
        color: #555;
    }

    .invoice-box table {
        width: 100%;
        line-height: inherit;
        text-align: left;
    }

    .invoice-box table td {
        padding: 5px;
        vertical-align: top;
    }

    .invoice-box table tr td:nth-child(2) {
        text-align: right;
    }

    .invoice-box table tr.top table td {
        padding-bottom: 20px;
    }

    .invoice-box table tr.top table td.title {
        font-size: 45px;
        line-height: 45px;
        color: #333;
    }

    .invoice-box table tr.information table td {
        padding-bottom: 40px;
    }

    .invoice-box table tr.heading td {
        background: #eee;
        border-bottom: 1px solid #ddd;
        font-weight: bold;
    }

    .invoice-box table tr.details td {
        padding-bottom: 20px;
    }

    .invoice-box table tr.item td{
        border-bottom: 1px solid #eee;
    }

    .invoice-box table tr.item.last td {
        border-bottom: none;
    }

    .invoice-box table tr.total td:nth-child(2) {
        border-top: 2px solid #eee;
        font-weight: bold;
    }

    @media only screen and (max-width: 600px) {
        .invoice-box table tr.top table td {
            width: 100%;
            display: block;
            text-align: center;
        }

        .invoice-box table tr.information table td {
            width: 100%;
            display: block;
            text-align: center;
        }
    }

    /** RTL **/
    .rtl {
        direction: rtl;
        font-family: Tahoma, 'Helvetica Neue', 'Helvetica', Helvetica, Arial, sans-serif;
    }

    .rtl table {
        text-align: right;
    }

    .rtl table tr td:nth-child(2) {
        text-align: left;
    }
    </style>
</head>

<body>
    <div class=""invoice-box"">
        <table cellpadding=""0"" cellspacing=""0"">
            <tr class=""top"">
                <td colspan=""2"">
                    <table>
                        <tr>
                            <td class=""title"">
                                <img src=""https://d2oc0ihd6a5bt.cloudfront.net/wp-content/uploads/sites/1044/2018/08/Westrac-Logo.jpg"" style=""width:100%; max-width:300px;"">
                            </td>

                            <td>
                                Invoice #: 123<br>
                                Created: December 6, 2018 12:41pm<br>
                                Due: December 6, 2018
                            </td>
                        </tr>
                    </table>
                </td>
            </tr>

            <tr class=""information"">
                <td colspan=""2"">
                    <table>
                        <tr>
                            <td>
                                Aimoresc, Inc.<br>
                                12345 Porter Street<br>
                                Ryde, NSW 2112
                            </td>

                            <td>
                                XAM Consulting Pty.<br>
                                Drew Alexander<br>
                                drew@example.com
                            </td>
                        </tr>
                    </table>
                </td>
            </tr>

            <tr class=""heading"">
                <td>
                    Payment Method
                </td>

                <td>
                    Check #
                </td>
            </tr>

            <tr class=""details"">
                <td>
                    Check
                </td>

                <td>
                    1000
                </td>
            </tr>

            <tr class=""heading"">
                <td>
                    Item
                </td>

                <td>
                    Price
                </td>
            </tr>

            <tr class=""item"">
                <td>
                    Sideshift machine
                </td>

                <td>
                    $70000.00
                </td>
            </tr>

            <tr class=""item"">
                <td>
                    Augers (Worktool)
                </td>

                <td>
                    $200.00
                </td>
            </tr>

            <tr class=""item last"">
                <td>
                    Commission (8%)
                </td>

                <td>
                    $5616.00
                </td>
            </tr>

            <tr class=""total"">
                <td></td>

                <td>
                   Total: $75816.00
                </td>
            </tr>
        </table>
    </div>
</body>
</html>";
            var documents = Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments);
            var file = Path.Combine(documents, "Invoice.pdf");

            webView.Delegate = new WebViewCallBack(file);
            webView.ScalesPageToFit = true;
            webView.UserInteractionEnabled = false;
            webView.BackgroundColor = UIColor.White;
            webView.LoadHtmlString(html, null);
            OpenFile(file);

            return file;
        }

        private void OpenFile(string filePath)
        {
            var window = UIApplication.SharedApplication.KeyWindow;
            var vc = window.RootViewController;
            while (vc.PresentedViewController != null)
            {
                vc = vc.PresentedViewController;
            }
            string path = Environment.GetFolderPath(Environment.SpecialFolder.Personal);
            //string filePath = Path.Combine(path, "sample.pdf");
            var viewer = UIDocumentInteractionController.FromUrl(NSUrl.FromFilename(filePath));
            viewer.PresentOpenInMenu(new RectangleF(0, -260, 320, 320), vc.View, true);
        }

        class WebViewCallBack : UIWebViewDelegate
        {

            string filename = null;
            public WebViewCallBack(string path)
            {
                this.filename = path;

            }
            public override void LoadingFinished(UIWebView webView)
            {
                double height, width;
                int header, sidespace;

                width = 595.2;
                height = 841.8;
                header = 10;
                sidespace = 10;


                UIEdgeInsets pageMargins = new UIEdgeInsets(header, sidespace, header, sidespace);
                webView.ViewPrintFormatter.ContentInsets = pageMargins;

                UIPrintPageRenderer renderer = new UIPrintPageRenderer();
                renderer.AddPrintFormatter(webView.ViewPrintFormatter, 0);

                CGSize pageSize = new CGSize(width, height);
                CGRect printableRect = new CGRect(sidespace,
                                  header,
                                  pageSize.Width - (sidespace * 2),
                                  pageSize.Height - (header * 2));
                CGRect paperRect = new CGRect(0, 0, width, height);
                renderer.SetValueForKey(NSValue.FromObject(paperRect), (NSString)"paperRect");
                renderer.SetValueForKey(NSValue.FromObject(printableRect), (NSString)"printableRect");
                NSData file = PrintToPDFWithRenderer(renderer, paperRect);
                File.WriteAllBytes(filename, file.ToArray());
            }

            private NSData PrintToPDFWithRenderer(UIPrintPageRenderer renderer, CGRect paperRect)
            {
                NSMutableData pdfData = new NSMutableData();
                UIGraphics.BeginPDFContext(pdfData, paperRect, null);

                renderer.PrepareForDrawingPages(new NSRange(0, renderer.NumberOfPages));

                CGRect bounds = UIGraphics.PDFContextBounds;

                for (int i = 0; i < renderer.NumberOfPages; i++)
                {
                    UIGraphics.BeginPDFPage();
                    renderer.DrawPage(i, paperRect);
                }
                UIGraphics.EndPDFContent();

                return pdfData;
            }

        }
    }
}

## PdfViewerDroid.cs
    public void OpenFile(string filePath)
    {

        var bytes = File.ReadAllBytes(filePath);

        //Copy the private file's data to the EXTERNAL PUBLIC location
        string externalStorageState = global::Android.OS.Environment.ExternalStorageState;
        string application = "";

        string extension = System.IO.Path.GetExtension (filePath);

        switch (extension.ToLower()) {
        case ".doc":
        case ".docx":
            application = "application/msword";
            break;
        case ".pdf":
            application = "application/pdf";
            break;
        case ".xls":
        case ".xlsx":
            application = "application/vnd.ms-excel";
            break;
        case ".jpg":
        case ".jpeg":
        case ".png":
            application = "image/jpeg";
            break;
        default:
            application = "*/*";
            break;
        }
        var externalPath = global::Android.OS.Environment.ExternalStorageDirectory.Path + "/report" + extension;
        File.WriteAllBytes(externalPath, bytes);

        Java.IO.File file = new Java.IO.File(externalPath);
        file.SetReadable(true);
        //Android.Net.Uri uri = Android.Net.Uri.Parse("file://" + filePath);
        Android.Net.Uri uri =  Android.Net.Uri.FromFile(file);
        Intent intent = new Intent(Intent.ActionView);
        intent.SetDataAndType(uri, application);
        intent.SetFlags(ActivityFlags.ClearWhenTaskReset | ActivityFlags.NewTask);

        try
        {
            Xamarin.Forms.Forms.Context.StartActivity(intent);
        }
        catch (Exception)
        {
            Toast.MakeText(Xamarin.Forms.Forms.Context, "No Application Available to View PDF", ToastLength.Short).Show();
        }
    }
	using System;
	using System.Drawing;
	using System.IO;
	using CatCatalog.iOS.Services;
	using CatCatalog.Services;
	using CoreGraphics;
	using Foundation;
	using UIKit;
	using Xamarin.Forms;

	[assembly: Dependency(typeof(PdfConverter))]
	namespace CatCatalog.iOS.Services
	{
	public class PdfConverter : IPdfConverter
	{
	public string SafeHTMLToPDF(string html, string filename)
	{
	UIWebView webView = new UIWebView(new CGRect(0, 0, 6.5 * 72, 9 * 72));

	html = @"<!doctype html>
	<html>
	<head>
	<meta charset=""utf-8"">
	<title>A simple, clean, and responsive HTML invoice template</title>

	<style>
	.invoice-box {
	max-width: 800px;
	margin: auto;
	padding: 30px;
	border: 1px solid #eee;
	box-shadow: 0 0 10px rgba(0, 0, 0, .15);
	font-size: 16px;
	line-height: 24px;
	font-family: 'Helvetica Neue', 'Helvetica', Helvetica, Arial, sans-serif;
	color: #555;
	}

	.invoice-box table {
	width: 100%;
	line-height: inherit;
	text-align: left;
	}

	.invoice-box table td {
	padding: 5px;
	vertical-align: top;
	}

	.invoice-box table tr td:nth-child(2) {
	text-align: right;
	}

	.invoice-box table tr.top table td {
	padding-bottom: 20px;
	}

	.invoice-box table tr.top table td.title {
	font-size: 45px;
	line-height: 45px;
	color: #333;
	}

	.invoice-box table tr.information table td {
	padding-bottom: 40px;
	}

	.invoice-box table tr.heading td {
	background: #eee;
	border-bottom: 1px solid #ddd;
	font-weight: bold;
	}

	.invoice-box table tr.details td {
	padding-bottom: 20px;
	}

	.invoice-box table tr.item td{
	border-bottom: 1px solid #eee;
	}

	.invoice-box table tr.item.last td {
	border-bottom: none;
	}

	.invoice-box table tr.total td:nth-child(2) {
	border-top: 2px solid #eee;
	font-weight: bold;
	}

	@media only screen and (max-width: 600px) {
	.invoice-box table tr.top table td {
	width: 100%;
	display: block;
	text-align: center;
	}

	.invoice-box table tr.information table td {
	width: 100%;
	display: block;
	text-align: center;
	}
	}

	/ RTL /
	.rtl {
	direction: rtl;
	font-family: Tahoma, 'Helvetica Neue', 'Helvetica', Helvetica, Arial, sans-serif;
	}

	.rtl table {
	text-align: right;
	}

	.rtl table tr td:nth-child(2) {
	text-align: left;
	}
	</style>
	</head>

	<body>
	<div class=""invoice-box"">
	<table cellpadding=""0"" cellspacing=""0"">
	<tr class=""top"">
	<td colspan=""2"">
	<table>
	<tr>
	<td class=""title"">
	<img src=""https://d2oc0ihd6a5bt.cloudfront.net/wp-content/uploads/sites/1044/2018/08/Westrac-Logo.jpg"" style=""width:100%; max-width:300px;"">
	</td>

	<td>
	Invoice #: 123<br>
	Created: December 6, 2018 12:41pm<br>
	Due: December 6, 2018
	</td>
	</tr>
	</table>
	</td>
	</tr>

	<tr class=""information"">
	<td colspan=""2"">
	<table>
	<tr>
	<td>
	Aimoresc, Inc.<br>
	12345 Porter Street<br>
	Ryde, NSW 2112
	</td>

	<td>
	XAM Consulting Pty.<br>
	Drew Alexander<br>
	drew@example.com
	</td>
	</tr>
	</table>
	</td>
	</tr>

	<tr class=""heading"">
	<td>
	Payment Method
	</td>

	<td>
	Check #
	</td>
	</tr>

	<tr class=""details"">
	<td>
	Check
	</td>

	<td>
	1000
	</td>
	</tr>

	<tr class=""heading"">
	<td>
	Item
	</td>

	<td>
	Price
	</td>
	</tr>

	<tr class=""item"">
	<td>
	Sideshift machine
	</td>

	<td>
	$70000.00
	</td>
	</tr>

	<tr class=""item"">
	<td>
	Augers (Worktool)
	</td>

	<td>
	$200.00
	</td>
	</tr>

	<tr class=""item last"">
	<td>
	Commission (8%)
	</td>

	<td>
	$5616.00
	</td>
	</tr>

	<tr class=""total"">
	<td></td>

	<td>
	Total: $75816.00
	</td>
	</tr>
	</table>
	</div>
	</body>
	</html>";
	var documents = Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments);
	var file = Path.Combine(documents, "Invoice.pdf");

	webView.Delegate = new WebViewCallBack(file);
	webView.ScalesPageToFit = true;
	webView.UserInteractionEnabled = false;
	webView.BackgroundColor = UIColor.White;
	webView.LoadHtmlString(html, null);
	OpenFile(file);

	return file;
	}

	private void OpenFile(string filePath)
	{
	var window = UIApplication.SharedApplication.KeyWindow;
	var vc = window.RootViewController;
	while (vc.PresentedViewController != null)
	{
	vc = vc.PresentedViewController;
	}
	string path = Environment.GetFolderPath(Environment.SpecialFolder.Personal);
	//string filePath = Path.Combine(path, "sample.pdf");
	var viewer = UIDocumentInteractionController.FromUrl(NSUrl.FromFilename(filePath));
	viewer.PresentOpenInMenu(new RectangleF(0, -260, 320, 320), vc.View, true);
	}

	class WebViewCallBack : UIWebViewDelegate
	{

	string filename = null;
	public WebViewCallBack(string path)
	{
	this.filename = path;

	}
	public override void LoadingFinished(UIWebView webView)
	{
	double height, width;
	int header, sidespace;

	width = 595.2;
	height = 841.8;
	header = 10;
	sidespace = 10;


	UIEdgeInsets pageMargins = new UIEdgeInsets(header, sidespace, header, sidespace);
	webView.ViewPrintFormatter.ContentInsets = pageMargins;

	UIPrintPageRenderer renderer = new UIPrintPageRenderer();
	renderer.AddPrintFormatter(webView.ViewPrintFormatter, 0);

	CGSize pageSize = new CGSize(width, height);
	CGRect printableRect = new CGRect(sidespace,
	header,
	pageSize.Width - (sidespace * 2),
	pageSize.Height - (header * 2));
	CGRect paperRect = new CGRect(0, 0, width, height);
	renderer.SetValueForKey(NSValue.FromObject(paperRect), (NSString)"paperRect");
	renderer.SetValueForKey(NSValue.FromObject(printableRect), (NSString)"printableRect");
	NSData file = PrintToPDFWithRenderer(renderer, paperRect);
	File.WriteAllBytes(filename, file.ToArray());
	}

	private NSData PrintToPDFWithRenderer(UIPrintPageRenderer renderer, CGRect paperRect)
	{
	NSMutableData pdfData = new NSMutableData();
	UIGraphics.BeginPDFContext(pdfData, paperRect, null);

	renderer.PrepareForDrawingPages(new NSRange(0, renderer.NumberOfPages));

	CGRect bounds = UIGraphics.PDFContextBounds;

	for (int i = 0; i < renderer.NumberOfPages; i++)
	{
	UIGraphics.BeginPDFPage();
	renderer.DrawPage(i, paperRect);
	}
	UIGraphics.EndPDFContent();

	return pdfData;
	}

	}
	}
	}
	public void OpenFile(string filePath)
	{

	var bytes = File.ReadAllBytes(filePath);

	//Copy the private file's data to the EXTERNAL PUBLIC location
	string externalStorageState = global::Android.OS.Environment.ExternalStorageState;
	string application = "";

	string extension = System.IO.Path.GetExtension (filePath);

	switch (extension.ToLower()) {
	case ".doc":
	case ".docx":
	application = "application/msword";
	break;
	case ".pdf":
	application = "application/pdf";
	break;
	case ".xls":
	case ".xlsx":
	application = "application/vnd.ms-excel";
	break;
	case ".jpg":
	case ".jpeg":
	case ".png":
	application = "image/jpeg";
	break;
	default:
	application = "/";
	break;
	}
	var externalPath = global::Android.OS.Environment.ExternalStorageDirectory.Path + "/report" + extension;
	File.WriteAllBytes(externalPath, bytes);

	Java.IO.File file = new Java.IO.File(externalPath);
	file.SetReadable(true);
	//Android.Net.Uri uri = Android.Net.Uri.Parse("file://" + filePath);
	Android.Net.Uri uri = Android.Net.Uri.FromFile(file);
	Intent intent = new Intent(Intent.ActionView);
	intent.SetDataAndType(uri, application);
	intent.SetFlags(ActivityFlags.ClearWhenTaskReset \| ActivityFlags.NewTask);

	try
	{
	Xamarin.Forms.Forms.Context.StartActivity(intent);
	}
	catch (Exception)
	{
	Toast.MakeText(Xamarin.Forms.Forms.Context, "No Application Available to View PDF", ToastLength.Short).Show();
	}
	}