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如何使用Rotativa在ASP.NET Core MVC中创建PDF详解

来源：百果情感网

边距

除了普通的展示pdf，我们还可以进行操作，例如下载，打印。当然如果宽和高不太满意，你可以对视图进行设置，其中有一个类是对视图进行配置的，其定义如下，有四大配置值。

public class Margins
 {
 [OptionFlag("-B")]
 public int? Bottom;
 [OptionFlag("-L")]
 public int? Left;
 [OptionFlag("-R")]
 public int? Right;
 [OptionFlag("-T")]
 public int? Top;

 public Margins();
 public Margins(int top, int right, int bottom, int left);

 public override string ToString();
 }

在控制器中直接new出它，然后直接return，和上面类似，现在你可以将html中的p标签添加一些内容，然后看一下效果。

[HttpGet]
 public IActionResult DemoViewAsPdf()
 {
 return new ViewAsPdf("DemoPageMarginsPDF")
 {
 PageMargins = { Left = 20, Bottom = 20, Right = 20, Top = 20 },
 };
 }

就这样，我们再次启动，可见已经有了外边距！

横向与纵向

它还给我们提供了横向还是竖向的pdf效果，如以下定义：

[HttpGet]
 public IActionResult DemoViewAsPdf(string Orientation)
 {
 if (Orientation == "Portrait")
 {
 var demoViewPortrait = new ViewAsPdf("DemoViewAsPDF")
 {
 FileName = "Invoice.pdf",
 PageOrientation = Rotativa.AspNetCore.Options.Orientation.Portrait,
 };
 return demoViewPortrait;
 }
 else
 {
 var demoViewLandscape = new ViewAsPdf("DemoViewAsPDF")
 {
 FileName = "Invoice.pdf",
 PageOrientation = Rotativa.AspNetCore.Options.Orientation.Landscape,
 };
 return demoViewLandscape;
 }
 }

通过 http//localhost:60042/demo/DemoOrientationPDF?Orientation=Portrait 或者其它路由进行访问，你对比以下就可以看到效果。

设置PDF大小

基本上都是A4,枚举里很多值，自己看~

[HttpGet]
 public IActionResult DemoViewAsPdf(string Orientation)
 {
 return new ViewAsPdf("DemoPageSizePDF")
 {
 PageSize = Rotativa.AspNetCore.Options.Size.A4
 };
 }

小案例

创建一个模型，这是一个非常简单的模型，定义如下：

public class Customer
 {
 public int CustomerID { get; set; }
 public string Name { get; set; }
 public string Address { get; set; }
 public string Country { get; set; }
 public string City { get; set; }
 public string Phoneno { get; set; }
 }

在控制器中new几个对象，然后返回pdf。

[HttpGet]
 public IActionResult DemoViewAsPdf()
 {
 List<Customer> customerList = new List<Customer>() {
 new Customer { CustomerID = 1, Address = "Taj Lands Ends 1", City = "Mumbai" , Country ="India", Name ="Sai", Phoneno ="9000000000"},
 new Customer { CustomerID = 2, Address = "Taj Lands Ends 2", City = "Mumbai" , Country ="India", Name ="Ram", Phoneno ="9000000000"},
 new Customer { CustomerID = 3, Address = "Taj Lands Ends 3", City = "Mumbai" , Country ="India", Name ="Sainesh", Phoneno ="9000000000"},
 new Customer { CustomerID = 4, Address = "Taj Lands Ends 4", City = "Mumbai" , Country ="India", Name ="Saineshwar", Phoneno ="9000000000"},
 new Customer { CustomerID = 5, Address = "Taj Lands Ends 5", City = "Mumbai" , Country ="India", Name ="Saibags", Phoneno ="9000000000"}
 };
 return new ViewAsPdf("DemoModelPDF", customerList);
 }

在视图中，我们只是迭代集合，渲染页面。

@model List<MvcHtmlToPdf.Models.Customer>
@{
 Layout = null;
}

<!DOCTYPE html>
<html lang="en">
<head>
 <title>Bootstrap Example</title>
 <meta charset="utf-8">
 <meta name="viewport" content="width=device-width, initial-scale=1">
</head>
<body>
 <div class="container">
 <h2>Customer</h2>
 <p>Customer Details</p>
 <table class="table table-bordered">
 <thead>
 <tr>
 <th>CustomerID</th>
 <th>Name</th>
 <th>Address</th>
 <th>Country</th>
 <th>City</th>
 <th>Phoneno</th>
 </tr>
 </thead>
 <tbody>

 @foreach (var item in Model)
 {
 <tr>
 <td>@item.CustomerID</td>
 <td>@item.Name</td>
 <td>@item.Address</td>
 <td>@item.Country</td>
 <td>@item.City</td>
 <td>@item.Phoneno</td>
 </tr>
 }

 </tbody>
 </table>
 </div>
</body>
</html>

总结