[研究]ASP.NET,試用 NReco.PdfGenerator 1.2.1 把 html 轉 pdf
2024-04-30
環境：Visual Studio 2022 + ASP.NET + WebForm + Web Application + C# + SQL Server 2019 + SQL Server Management Studio (SSMS) 19
NuGet Gallery | NReco.PdfGenerator 1.2.1
https://www.nuget.org/packages/NReco.PdfGenerator
Convert HTML to PDF in C#/.NET with NReco.PdfGenerator (FREE)
https://www.nrecosite.com/pdf_generator_net.aspx
線上說明
https://www.nrecosite.com/doc/NReco.PdfGenerator/
授權：1. Can I use PdfGenerator in my commercial project for FREE?
NReco.PdfGenerator can be used for FREE in .NET apps that have only one single-server production deployment.
A commercial license is required for:
- Applications with multiple deployments, or one multi-server production deployment
- SaaS apps
官方範例
Convert HTML to PDF in your C# code:
var htmlContent = String.Format("<body>Hello world: {0}</body>",
DateTime.Now);
var htmlToPdf = new NReco.PdfGenerator.HtmlToPdfConverter();
var pdfBytes = htmlToPdf.GeneratePdf(htmlContent);
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Create PDF from HTML file or URL:
htmlToPdf.GeneratePdfFromFile("http://www.nrecosite.com/", null, "export.pdf");
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NuGet 安裝 NReco.PdfGenerator 1.2.1 並沒有相依套件。
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">
<asp:Button ID="Button1" runat="server" Text="Button" OnClick="Button1_Click" />
</form>
</body>
</html>
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Default.aspx.cs
using System;
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)
{
System.Text.StringBuilder html = new System.Text.StringBuilder();
html.Append("<html>");
html.Append("<head>");
html.Append("<meta charset='utf-8' />");
html.Append("<title>無標題文件</title>");
html.Append(@"<style>
body {
margin: 0px;
padding: 0px;
}
.Paper {
width: 1000px;
margin-right: auto;
margin-left: auto;
}
</style>"); html.Append("</head>");
html.Append("<body>");
html.Append("<div class='Paper'>");
// h1 不可有「報名表」，否則產出的 .pdf 索引會變成「報吊表」
//html.Append("<h1 style ='text-align:center'>報名表</h1>");
// 若用 h1、h2、、等，產生的 .pdf 會有書籤定位點，「報名表」在書籤定位點會顯示成「報吊表」，故改用 div
html.Append("<div style ='text-align:center; font-size:xx-large'>報名表</div>");
string FName = "test.pdf";
var htmlToPdf = new NReco.PdfGenerator.HtmlToPdfConverter();
var pdfBytes = htmlToPdf.GeneratePdf(html.ToString());
//Response給用戶端下載
Response.Clear();
Response.AddHeader("content-disposition", "attachment; filename=" + FName);//強制下載
Response.ContentType = "application/octet-stream";
Response.BinaryWrite(pdfBytes);
}
}
}
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