浮雲雅築: [研究][ASP.NET]OpenHtmlToPdf v1.12.0 產生 pdf (NuGet 安裝)

2018年3月20日星期二

[研究][ASP.NET]OpenHtmlToPdf v1.12.0 產生 pdf (NuGet 安裝)

[研究][ASP.NET]OpenHtmlToPdf v1.12.0 產生 pdf (NuGet 安裝)

2018-03-20

OpenHtmlToPdf
https://github.com/vilppu/OpenHtmlToPdf

OpenHtmlToPdf 是 .NET library，可把 HTML 文件轉為 PDF 格式。它使用 WkHtmlToPdf native Windows library 來做這件事情。

WkHtmlToPdf native Windows library
https://github.com/wkhtmltopdf/wkhtmltopdf

授權
https://creativecommons.org/licenses/by/3.0/

新增說明文字

Default.aspx

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="WebApplication1.Default" %>

<!DOCTYPE html>

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
<title></title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:Button ID="Button1" runat="server" Text="Button" OnClick="Button1_Click" /><br />
<asp:Button ID="Button2" runat="server" Text="Button" OnClick="Button2_Click" /><br />
<asp:Button ID="Button3" runat="server" Text="Button" OnClick="Button3_Click" /><br />
<asp:Button ID="Button4" runat="server" Text="Button" OnClick="Button4_Click" /><br />
</div>
</form>
</body>
</html>

Default.aspx.cs

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using OpenHtmlToPdf;

namespace WebApplication1
{
public partial class Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{

}

protected void Button1_Click(object sender, EventArgs e)
{
const string html =
"<!DOCTYPE html>" +
"<html>" +
"<head><meta charset='UTF-8'><title>Title</title></head>" +
"<body>測試 Body text...</body>" +
"</html>";
var pdf = Pdf.From(html).Content();
this.Response.AddHeader("Content-Type", "application/pdf");
this.Response.AddHeader("Content-Disposition", "attachment; filename=SampleGuide.pdf");
this.Response.Flush();
this.Response.BinaryWrite(pdf);
//DocumentContent is a Byte[] of the data to be written in PDF
this.Response.Flush();
this.Response.End();
}

protected void Button2_Click(object sender, EventArgs e)
{
const string html =
"<!DOCTYPE html>" +
"<html>" +
"<head><meta charset='UTF-8'><title>Title</title></head>" +
"<body>測試 Body text...</body>" +
"</html>";

var pdf = Pdf
.From(html)
.OfSize(PaperSize.A4)
.WithTitle("Title")
.WithoutOutline()
.WithMargins(1.25.Centimeters())
.Portrait()
.Comressed()
.Content();

this.Response.AddHeader("Content-Type", "application/pdf");
this.Response.AddHeader("Content-Disposition", "attachment; filename=SampleGuide.pdf");
this.Response.Flush();
this.Response.BinaryWrite(pdf);
//DocumentContent is a Byte[] of the data to be written in PDF
this.Response.Flush();
this.Response.End();
}

protected void Button3_Click(object sender, EventArgs e)
{
const string html =
"<!DOCTYPE html>" +
"<html>" +
"<head><meta charset='UTF-8'><title>Title</title></head>" +
"<body>測試 Body text...</body>" +
"</html>";

var pdf = Pdf
.From(html)
.WithGlobalSetting("orientation", "Landscape")
.WithObjectSetting("web.defaultEncoding", "utf-8")
.Content();

this.Response.AddHeader("Content-Type", "application/pdf");
this.Response.AddHeader("Content-Disposition", "attachment; filename=SampleGuide.pdf");
this.Response.Flush();
this.Response.BinaryWrite(pdf);
//DocumentContent is a Byte[] of the data to be written in PDF
this.Response.Flush();
this.Response.End();
}

protected void Button4_Click(object sender, EventArgs e)
{
// 把 aspx 轉成 html
string path= "WebForm1.aspx";
System.Web.UI.Page page = new Page();
StringWriter writer = new StringWriter();
page.Server.Execute(path, writer);
string html = writer.ToString();

// 使用 OpenHtmlToPdf 把 html 轉成 pdf
var pdf = Pdf.From(html).Content();

// 輸出
this.Response.AddHeader("Content-Type", "application/pdf");
this.Response.AddHeader("Content-Disposition", "attachment; filename=SampleGuide.pdf");
this.Response.Flush();
this.Response.BinaryWrite(pdf);
//DocumentContent is a Byte[] of the data to be written in PDF
this.Response.Flush();
this.Response.End();
}
}
}

WebForm1.aspx

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs" Inherits="WebApplication1.WebForm1" %>

<!DOCTYPE html>

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
<title></title>
</head>
<body>
<form id="form1" runat="server">
<div>
測試<br />
TEST
</div>
</form>
</body>
</html>

WebForm1.aspx.cs 為預設，沒有改寫。