We generate PDF from an HTML template with conditions using wkhtmltopdf and RazorEngine
Despite the fact that the post offers a blank, a recipe for ASP.NET, according to a similar principle, it is possible to implement the solution for other platforms.
Task:
Under the cut - a very simple and short solution, code examples in C #. Despite this, that the post offers a blank-recipe for ASP.NET, according to similar principles, it is possible to implement the solution for other platforms.
Decision:
The resulting PDF:
Wkhtmltopdf has versions for different operating systems, source codes.
The template engine, of course, can be used differently.
Minus ideas - an external utility is used.
Task:
- generate a DOC or PDF from a file template, with substitution of values
- you need the ability to include minimal logic in the template to write less code, if you only need to edit external files
- update . the result of the work should be saved to a file for further manipulation
Under the cut - a very simple and short solution, code examples in C #. Despite this, that the post offers a blank-recipe for ASP.NET, according to similar principles, it is possible to implement the solution for other platforms.
Decision:
- We generate a temporary HTML file. The file will be generated by the RazorEngine engine (can be installed via NuGet ). The code will look something like this:
')string template = File.ReadAllText("template1.cshtml"); string result = Razor.Parse(template, new { Name = "", ShowBlock1 = false, ShowBlock2 = true }); File.WriteAllText("C:/tests/input.html", result);
Content template1.cshtml<!DOCTYPE html> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" > </head> <body> <h1> .</h1> <p> - @Model.Name</p> <p style="display:@( Model.ShowBlock1 ? "block" : "none")"> 1</p> <p style="display:@( Model.ShowBlock2 ? "block" : "none")"> 2</p> <table style="border:1px solid black" border="1" style="width:100%" width="100%"> <tr> <td>111</td> <td><img src="C:/tests/1.png"/></td> <td>333</td> </tr> </table> </body> </html> - Now we generate the file by calling an external utility - wkhtmltopdf , you can download it here .
var process = new Process { StartInfo = { FileName = "C:/Program Files (x86)/wkhtmltopdf/wkhtmltopdf.exe", Arguments = "C:/tests/input.html C:/tests/output.pdf" } }; process.Start(); - At the end of the temporary file can be deleted.
File.Delete("C:/tests/input.html");
The resulting PDF:
Wkhtmltopdf has versions for different operating systems, source codes.
The template engine, of course, can be used differently.
Minus ideas - an external utility is used.
Source: https://habr.com/ru/post/190658/
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