Signalr C#（开发者如何使用）

using Microsoft.AspNetCore.SignalR;
using System.Threading.Tasks;

// Define a SignalR Hub class named ChatHub
public class ChatHub : Hub
{
    // Asynchronous method to send messages
    public async Task SendMessage(string user, string message)
    {
        // Send a message to all connected clients
        await Clients.All.SendAsync("ReceiveMessage", user, message);
    }
}

Imports Microsoft.AspNetCore.SignalR
Imports System.Threading.Tasks

' Define a SignalR Hub class named ChatHub
Public Class ChatHub
	Inherits Hub

	' Asynchronous method to send messages
	Public Async Function SendMessage(ByVal user As String, ByVal message As String) As Task
		' Send a message to all connected clients
		Await Clients.All.SendAsync("ReceiveMessage", user, message)
	End Function
End Class

public class Startup
{
    // Configure services and add SignalR
    public void ConfigureServices(IServiceCollection services)
    {
        services.AddSignalR(); // Add SignalR services
    }

    // Configure the app to use SignalR and map the hub
    public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
    {
        // Setup endpoint to route to ChatHub
        app.UseEndpoints(endpoints =>
        {
            endpoints.MapHub<ChatHub>("/chatHub");
        });
    }
}

Public Class Startup
	' Configure services and add SignalR
	Public Sub ConfigureServices(ByVal services As IServiceCollection)
		services.AddSignalR() ' Add SignalR services
	End Sub

	' Configure the app to use SignalR and map the hub
	Public Sub Configure(ByVal app As IApplicationBuilder, ByVal env As IWebHostEnvironment)
		' Setup endpoint to route to ChatHub
		app.UseEndpoints(Sub(endpoints)
			endpoints.MapHub(Of ChatHub)("/chatHub")
		End Sub)
	End Sub
End Class

<script src="https://cdn.jsdelivr.net/npm/@microsoft/signalr@3.1.8/dist/browser/signalr.js"></script>

// Create a connection to the SignalR hub
const connection = new signalR.HubConnectionBuilder()
    .withUrl("/chatHub") // The hub URL
    .build();

// Start the connection
connection.start().catch(err => console.error(err.toString()));

// Setup a listener for receiving messages
connection.on("ReceiveMessage", (user, message) => {
    console.log(`${user} says: ${message}`);
});

// Send a message from the server to all connected clients
await Clients.All.SendAsync("ReceiveMessage", "Server", "Hello from server!");

' Send a message from the server to all connected clients
Await Clients.All.SendAsync("ReceiveMessage", "Server", "Hello from server!")

// Send a message from the client to the server
connection.send("SendMessage", "Client", "Hello from client!")
    .catch(err => console.error(err.toString()));

public class Startup
{
    public void ConfigureServices(IServiceCollection services)
    {
        // Add Azure SignalR services
        services.AddSignalR().AddAzureSignalR();
    }

    public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
    {
        // Use Azure SignalR and map hub with routes
        app.UseAzureSignalR(routes =>
        {
            routes.MapHub<ChatHub>("/chatHub");
        });
    }
}

Public Class Startup
	Public Sub ConfigureServices(ByVal services As IServiceCollection)
		' Add Azure SignalR services
		services.AddSignalR().AddAzureSignalR()
	End Sub

	Public Sub Configure(ByVal app As IApplicationBuilder, ByVal env As IWebHostEnvironment)
		' Use Azure SignalR and map hub with routes
		app.UseAzureSignalR(Sub(routes)
			routes.MapHub(Of ChatHub)("/chatHub")
		End Sub)
	End Sub
End Class

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