Create Group connections that are specific to a user

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Sun Jul 02 2023 19:05:28 GMT+0000 (Coordinated Universal Time)

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

public class MyHub : Hub
{
    public override async Task OnConnectedAsync()
    {
        var userId = Context.User.FindFirstValue(ClaimTypes.NameIdentifier);
        await Groups.AddToGroupAsync(Context.ConnectionId, userId);

        await base.OnConnectedAsync();
    }
}
////////////////////////////////////////////////////////////////////
public async Task SendMessageToUser(string userId, string message)
{
    await Clients.Group(userId).SendAsync("ReceiveMessage", message);
}

COPY

In this example, the OnConnectedAsync method is overridden to add the connection (identified by Context.ConnectionId) to a group named after the user's unique identifier. The ClaimTypes.NameIdentifier is used to retrieve the user's identifier from the claims associated with the connection's User property. By adding the connection to a group named after the user's identifier, you can later target messages or events specifically to that user by invoking methods on the group using Clients.Group(userId). In the above code, the SendMessageToUser method targets the group associated with the specified userId and invokes the ReceiveMessage method on all connections within that group. This allows you to send messages or notifications directly to a specific user. Remember to configure your authentication mechanism properly to ensure the user's unique identifier is available in the ClaimTypes.NameIdentifier claim.

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Comments

SignalR

@cameron_v_r

Tutorial: Get started with ASP.NET Core SignalR using TypeScript and Webpack | Microsoft Learn Use hubs in ASP.NET Core SignalR | Microsoft Learn Receive messages from client side Use hubs in ASP.NET Core SignalR | Microsoft Learn Receiving messages from client with an interface Use hubs in ASP.NET Core SignalR | Microsoft Learn Hub Dependency injection from a DB service example SignalR HubContext | Microsoft Learn Connect SignalR hub to a controller through DI SignalR HubContext | Microsoft Learn ChatController Hub DI Manage users and groups in SignalR | Microsoft Learn Create Group connections that are specific to a user Authentication and authorization in ASP.NET Core SignalR | Microsoft Learn | Hub Connection with JWT Authentication and authorization in ASP.NET Core SignalR | Microsoft Learn | Auth in Hub methods Conversation ChatHub

#blazor #c# #html

[SOLVED] - Blazor onchange event with select dropdown

@inject HttpClient httpClient

@if (States != null)
{

<select id="SearchStateId" name="stateId" @onchange="DoStuff" class="form-control1">
    <option>@InitialText</option>
    @foreach (var state in States)
    {
        <option value="@state.Name">@state.Name</option>
    }
</select>
}


@code {
[Parameter] public string InitialText { get; set; } = "Select State";
private KeyValue[] States;
private string selectedString { get; set; }
protected override async Task OnInitializedAsync()
{
    States = await httpClient.GetJsonAsync<KeyValue[]>("/sample-data/State.json");
}

private void DoStuff(ChangeEventArgs e)
{
    selectedString = e.Value.ToString();
    Console.WriteLine("It is definitely: " + selectedString);
}

public class KeyValue
{
    public int Id { get; set; }

    public string Name { get; set; }
}
}

#c#

Unity Convert LocalSpace to WorldSpace

//You need this because ur velocity is in localSpace
//This works if you start the game at 0,0,0 rotation,
//what if you start the game at 0,180,0 rotation?  
//Then your up arrow will move you backwards.


//Get inputs
float horzInput = Input.GetAxis("Horizontal");
float vertInput = Input.GetAxis("Vertical");

//Calc Velocity
Vector3 direction = new Vector3(horzInput, 0.0f, vertInput);
Vector3 velocity = direction * _speed;

//Gravity
velocity.y -= _gravity;

//Convert localSpace velocity to worldSpace
velocity = transform.transform.TransformDirection(velocity); //<-Weimberger's way
velocity = transform.TransformDirection(velocity); //<-myWay

//Move
_controller.Move(velocity * Time.deltaTime);

#c#

Unity (C#) equivalent of SetInterval()

void Start(){ 
  StartCoroutine(SpawnObject()); 
}

IEnumerator SpawnObject(){
  while (true){
    yield return new WaitForSeconds(1.0f); // every 1 second
    Instantiate(objectToSpawn);
  }
}

#C# #c#

I want Input text file in sap using c#

   foreach (string line in lines)
            {
                string[] a = line.Split('|');
                oDocumentSQ.DocNum = Convert.ToInt32(a[0]);
                oDocumentSQ.CardCode = a[1];
                oDocumentSQ.NumAtCard = a[2];
                oDocumentSQ.DocDate = Convert.ToDateTime(a[3]);

                oDocumentSQ.Lines.ItemCode = a[4];
                oDocumentSQ.Lines.UnitPrice = Convert.ToDouble(a[5]);
                oDocumentSQ.Lines.Quantity = Convert.ToInt32(a[6]);
                oDocumentSQ.Lines.VatGroup = a[7];
                oDocumentSQ.Lines.Add();             
            }

#C# #c# #array #dictionary

How to clear item not input when count frequency use Dictionary C#

for (int i = 0; i < n; i++)
{
    if (valCount.ContainsKey(x))
        valCount[x]++;
    else
        valCount[x] = 1;
}

#c#

NuGet Gallery | DocumentFormat.OpenXml 2.11.0

Install-Package DocumentFormat.OpenXml -Version 2.11.0

#c#

How to initialize a dictionary with a collection initializer - C# Programming Guide | Microsoft Docs

public class HowToDictionaryInitializer
{
    class StudentName
    {
        public string FirstName { get; set; }
        public string LastName { get; set; }
        public int ID { get; set; }
    }

    public static void Main()
    {
        var students = new Dictionary<int, StudentName>()
        {
            { 111, new StudentName { FirstName="Sachin", LastName="Karnik", ID=211 } },
            { 112, new StudentName { FirstName="Dina", LastName="Salimzianova", ID=317 } },
            { 113, new StudentName { FirstName="Andy", LastName="Ruth", ID=198 } }
        };

        foreach(var index in Enumerable.Range(111, 3))
        {
            Console.WriteLine($"Student {index} is {students[index].FirstName} {students[index].LastName}");
        }
        Console.WriteLine();		

        var students2 = new Dictionary<int, StudentName>()
        {
            [111] = new StudentName { FirstName="Sachin", LastName="Karnik", ID=211 },
            [112] = new StudentName { FirstName="Dina", LastName="Salimzianova", ID=317 } ,
            [113] = new StudentName { FirstName="Andy", LastName="Ruth", ID=198 }
        };

        foreach (var index in Enumerable.Range(111, 3))
        {
            Console.WriteLine($"Student {index} is {students2[index].FirstName} {students2[index].LastName}");
        }
    }
}

#c#

Class

public int Id { get; set; }

        [Required]
        public string Klant { get; set; }

        [DataType(DataType.EmailAddress)]
        public string Email { get; set; }

        [DataType(DataType.PhoneNumber)]
        public string Telefoonnummer { get; set; }

        [Required]
        public int Aantalpersonen { get; set; }

        [Required]
        [DataType(DataType.Date)]
        public DateTime Datum { get; set; }

        [Required]
        [DataType(DataType.Time)]
        public DateTime Begintijd { get; set; }

        [Required]
        [DataType(DataType.Time)]
        public DateTime Eindtijd { get; set; }

        [DataType(DataType.MultilineText)]
        public string Opmerkingen { get; set; }
        public string Medewerker { get; set; }
        public DateTime AanmaakDatum { get; set; }

#c#

Class Bon

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;

namespace GoodTimes.Models
{
    public class Bon
    {
        public int Id { get; set; }
        public int Tafelnr { get; set; }
        public DateTime Bezoek { get; set; }
        public string Medewerker { get; set; }
        public int Bonnummer { get; set; }

        public List<BonRegel> BonRegels { get; set; }

        public List<Bestelling> Bestellings { get; set; }
    }
}

#c#

Class Reserveren

using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
using System.Linq;
using System.Threading.Tasks;

namespace GoodTimes.Models
{
    public class Reserveren
    {
        public int Id { get; set; }

        [Required]
        public string Klant { get; set; }

        [DataType(DataType.EmailAddress)]
        public string Email { get; set; }

        [DataType(DataType.PhoneNumber)]
        public string Telefoonnummer { get; set; }

        [Required]
        public int Aantalpersonen { get; set; }

        [Required]
        [DataType(DataType.Date)]
        public DateTime Datum { get; set; }

        [Required]
        [DataType(DataType.Time)]
        public DateTime Begintijd { get; set; }

        [Required]
        [DataType(DataType.Time)]
        public DateTime Eindtijd { get; set; }

        [DataType(DataType.MultilineText)]
        public string Opmerkingen { get; set; }
        public string Medewerker { get; set; }
        public DateTime AanmaakDatum { get; set; }
    }
}

#c#

ApplicationDbContext

using System;
using System.Collections.Generic;
using System.Text;
using Microsoft.AspNetCore.Identity.EntityFrameworkCore;
using Microsoft.EntityFrameworkCore;
using GoodTimes.Models;

namespace GoodTimes.Data
{
    public class ApplicationDbContext : IdentityDbContext
    {
        public ApplicationDbContext(DbContextOptions<ApplicationDbContext> options)
            : base(options)
        {
        }
        public DbSet<GoodTimes.Models.Reserveren> Reserveren { get; set; }
        public DbSet<GoodTimes.Models.Menukaart> Menukaart { get; set; }
        public DbSet<GoodTimes.Models.Categorie> Categorie { get; set; }
        public DbSet<GoodTimes.Models.Product> Product { get; set; }

        protected override void OnModelCreating(ModelBuilder builder)
        {
            base.OnModelCreating(builder);
            builder.Entity<Menukaart>().HasData(
                new Menukaart
                {
                    Id = 1,
                    Naam = "Lunchkaart"
                },
                new Menukaart
                {
                    Id = 2,
                    Naam = "Dinerkaart"
                },
                new Menukaart
                {
                    Id = 3,
                    Naam = "Drankenkaart"
                }
            );
        }

        public DbSet<GoodTimes.Models.Bestelling> Bestelling { get; set; }

        //public DbSet<GoodTimes.Models.Bon> Bon { get; set; }

        //public DbSet<GoodTimes.Models.BonRegel> BonRegel { get; set; }
    }
}

#c#

Bestelling

using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
using System.Linq;
using System.Threading.Tasks;

namespace GoodTimes.Models
{
    public class Bestelling
    {
        public int Id { get; set; }
        public int Tafelnummer { get; set; }
        public int Aantal { get; set; }
        [DataType(DataType.MultilineText)]
        public string Opmerkingen { get; set; }
        public string Medewerker { get; set; }
        public DateTime Plaatsing { get; set; }
        public bool IsGereed { get; set; }

        //public List<BonRegel> BonRegels { get; set; }

        //public int BonId { get; set; }
        //public Bon Bon { get; set; }
    }
}

#c#

Categorie

using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
using System.Linq;
using System.Threading.Tasks;

namespace GoodTimes.Models
{
    public class Categorie
    {
        public int Id { get; set; }
        [Required]
        public string Naam { get; set; }
        public int Volgorde { get; set; }

        public int MenukaartId { get; set; }
        public Menukaart Menukaart { get; set; }

        public List<Product> products { get; set; }
    }
}

#c#

Product

using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
using System.Linq;
using System.Threading.Tasks;

namespace GoodTimes.Models
{
    public class Product
    {
        public int Id { get; set; }
        [Required]
        public string Naam { get; set; }
        [Required]
        [DataType(DataType.MultilineText)]
        public string Omschrijving { get; set; }
        [Required]
        public double Prijs { get; set; }
        public int Volgorde { get; set; }

        public int CategorieId { get; set; }
        public Categorie categorie { get; set; }
    }
}

#c# #loops #for

"*" pattern C#

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace StarPattern
{
class Program
{
static void Main(string[] args)
{
int x, y, z;
for (x =6; x >= 1; x--)
{
for (y = 1; y < x; y++)
{
Console.Write(" ");
}
for (z = 6; z >= x; z--)
{
Console.Write("*");
}
Console.WriteLine();
}
Console.ReadLine();
}
}
}

Create Group connections that are specific to a user

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Create Group connections that are specific to a user

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