Newtonsoft Jsonpath（开发者如何使用）

using Newtonsoft.Json;

Imports Newtonsoft.Json

public class Person
{
    public string Name { get; set; }
    public int Age { get; set; }
    public string Email { get; set; }
}

string jsonString = "JSON string here";
Person person = JsonConvert.DeserializeObject<Person>(jsonString);

Public Class Person
	Public Property Name() As String
	Public Property Age() As Integer
	Public Property Email() As String
End Class

Private jsonString As String = "JSON string here"
Private person As Person = JsonConvert.DeserializeObject(Of Person)(jsonString)

string path = "path to your json file";
string jsonString = File.ReadAllText(path);
Person person = JsonConvert.DeserializeObject<Person>(jsonString);

Dim path As String = "path to your json file"
Dim jsonString As String = File.ReadAllText(path)
Dim person As Person = JsonConvert.DeserializeObject(Of Person)(jsonString)

Person person = new Person() 
{
    Name = "John Doe",
    Age = 30,
    Email = "johndoe@example.com"
};

string path = "path to your json file";
string jsonString = JsonConvert.SerializeObject(person);
File.WriteAllText(path, jsonString);

Dim person As New Person() With {
	.Name = "John Doe",
	.Age = 30,
	.Email = "johndoe@example.com"
}

Dim path As String = "path to your json file"
Dim jsonString As String = JsonConvert.SerializeObject(person)
File.WriteAllText(path, jsonString)

JArray friends = (JArray)jsonObject["Friends"];
foreach (JObject friend in friends)
{
    string friendName = (string)friend["Name"];
    Console.WriteLine(friendName);
}

Dim friends As JArray = CType(jsonObject("Friends"), JArray)
For Each [friend] As JObject In friends
	Dim friendName As String = CStr([friend]("Name"))
	Console.WriteLine(friendName)
Next [friend]

jsonObject["Age"] = 31; // Update the age

jsonObject("Age") = 31 ' Update the age

string updatedJson = jsonObject.ToString();
File.WriteAllText(path, updatedJson); // Write back to the file

Dim updatedJson As String = jsonObject.ToString()
File.WriteAllText(path, updatedJson) ' Write back to the file

var youngFriends = jsonObject["Friends"].Where(f => (int)f["Age"] < 30)
                                        .Select(f => (string)f["Name"]);
foreach (string name in youngFriends)
{
    Console.WriteLine(name);
}

Imports System

Dim youngFriends = jsonObject("Friends").Where(Function(f) CInt(Math.Truncate(f("Age"))) < 30).Select(Function(f) CStr(f("Name")))
For Each name As String In youngFriends
	Console.WriteLine(name)
Next name

using IronPdf;

class Program
{
    static void Main(string[] args)
    {
        var renderer = new ChromePdfRenderer();

        // 1. Convert HTML String to PDF
        var htmlContent = "<h1>Hello, IronPDF!</h1><p>This is a PDF from an HTML string.</p>";
        var pdfFromHtmlString = renderer.RenderHtmlAsPdf(htmlContent);
        pdfFromHtmlString.SaveAs("HTMLStringToPDF.pdf");

        // 2. Convert HTML File to PDF
        var htmlFilePath = "path_to_your_html_file.html"; // Specify the path to your HTML file
        var pdfFromHtmlFile = renderer.RenderHtmlFileAsPdf(htmlFilePath);
        pdfFromHtmlFile.SaveAs("HTMLFileToPDF.pdf");

        // 3. Convert URL to PDF
        var url = "http://ironpdf.com"; // Specify the URL
        var pdfFromUrl = renderer.RenderUrlAsPdf(url);
        pdfFromUrl.SaveAs("URLToPDF.pdf");
    }
}

Imports IronPdf

Friend Class Program
	Shared Sub Main(ByVal args() As String)
		Dim renderer = New ChromePdfRenderer()

		' 1. Convert HTML String to PDF
		Dim htmlContent = "<h1>Hello, IronPDF!</h1><p>This is a PDF from an HTML string.</p>"
		Dim pdfFromHtmlString = renderer.RenderHtmlAsPdf(htmlContent)
		pdfFromHtmlString.SaveAs("HTMLStringToPDF.pdf")

		' 2. Convert HTML File to PDF
		Dim htmlFilePath = "path_to_your_html_file.html" ' Specify the path to your HTML file
		Dim pdfFromHtmlFile = renderer.RenderHtmlFileAsPdf(htmlFilePath)
		pdfFromHtmlFile.SaveAs("HTMLFileToPDF.pdf")

		' 3. Convert URL to PDF
		Dim url = "http://ironpdf.com" ' Specify the URL
		Dim pdfFromUrl = renderer.RenderUrlAsPdf(url)
		pdfFromUrl.SaveAs("URLToPDF.pdf")
	End Sub
End Class

var pdf = IronPdf.PdfDocument.FromFile("document.pdf");
var metadata = pdf.MetaData;

Dim pdf = IronPdf.PdfDocument.FromFile("document.pdf")
Dim metadata = pdf.MetaData

string jsonString = JsonConvert.SerializeObject(metadata, Formatting.Indented);
File.WriteAllText("metadata.json", jsonString);

Dim jsonString As String = JsonConvert.SerializeObject(metadata, Formatting.Indented)
File.WriteAllText("metadata.json", jsonString)