PontiacGTX Posts - Answer Overflow

PontiacGTX

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CC#

•Created by PontiacGTX on 5/16/2024 in #help

Blazor sends wrong index to the event

2 replies

CC#

•Created by PontiacGTX on 9/22/2023 in #help

❔ trying to consume signalr through gateway

I am using the followin json in my gateway

{
  "DownstreamPathTemplate": "/ws",
  "UpstreamPathTemplate": "/",
  "DownstreamScheme": "ws",
  "DownstreamHostAndPorts": [
    {
      "Host": "localhost",
      "Port": 7200
    }
  ]
},
{
  "DownstreamPathTemplate": "/DriversHub/GetDriversDetail/{number}",
  "DownstreamScheme": "ws",
  "DownstreamHostAndPorts": [
    {
      "Host": "localhost",
      "Port": 7200
    }
  ],
  "UpstreamPathTemplate": "/upwg/DriversHub/GetDriversDetail/{number}",
  "UpstreamHttpMethod": [ "GET", "POST", "PUT", "DELETE", "OPTIONS" ]
}

{
  "DownstreamPathTemplate": "/ws",
  "UpstreamPathTemplate": "/",
  "DownstreamScheme": "ws",
  "DownstreamHostAndPorts": [
    {
      "Host": "localhost",
      "Port": 7200
    }
  ]
},
{
  "DownstreamPathTemplate": "/DriversHub/GetDriversDetail/{number}",
  "DownstreamScheme": "ws",
  "DownstreamHostAndPorts": [
    {
      "Host": "localhost",
      "Port": 7200
    }
  ],
  "UpstreamPathTemplate": "/upwg/DriversHub/GetDriversDetail/{number}",
  "UpstreamHttpMethod": [ "GET", "POST", "PUT", "DELETE", "OPTIONS" ]
}

and the front end has this code

8 replies

CC#

•Created by PontiacGTX on 7/17/2023 in #help

✅ Serilog does not write logs to file

I have tried to configure it on the appsettings to write file but it doesnt

{
  "Serilog": {
    "Using": [ "Serilog.Sinks.Console", "Serilog.Sinks.File" ],
    "MinimumLevel": {
      "Default": "Debug",
      "Microsoft": "Information",
      "System": "Information"
    },
    "Enrich": [ "FromLogContext", "WithMachineName", "WithProcessId", "WithThreadId" ],
    "WriteTo": [
      {
        "Name": "Console",
        "outputTemplate": "{Timestamp:yyyy-MM-dd HH:mm:ss.fff zzz} [{Level}] [{SourceContext}] [{EventId}] {Message}{NewLine}{Exception}"
      },
      {

        "Name": "File",
        "Args": {

          "pathFormat": "\\Employeeslog-{Date}.txt",
          "rollOnFileSizeLimit": true,
          "outputTemplate": "{Timestamp:yyyy-MM-dd HH:mm:ss.fff zzz} [{Level}] [{SourceContext}] [{EventId}] {Message}{NewLine}{Exception}",
          "formatter": "Serilog.Formatting.Json.JsonFormatter",
          "rollingInterval": "Day"
        }
      }
    ]
  }
}

{
  "Serilog": {
    "Using": [ "Serilog.Sinks.Console", "Serilog.Sinks.File" ],
    "MinimumLevel": {
      "Default": "Debug",
      "Microsoft": "Information",
      "System": "Information"
    },
    "Enrich": [ "FromLogContext", "WithMachineName", "WithProcessId", "WithThreadId" ],
    "WriteTo": [
      {
        "Name": "Console",
        "outputTemplate": "{Timestamp:yyyy-MM-dd HH:mm:ss.fff zzz} [{Level}] [{SourceContext}] [{EventId}] {Message}{NewLine}{Exception}"
      },
      {

        "Name": "File",
        "Args": {

          "pathFormat": "\\Employeeslog-{Date}.txt",
          "rollOnFileSizeLimit": true,
          "outputTemplate": "{Timestamp:yyyy-MM-dd HH:mm:ss.fff zzz} [{Level}] [{SourceContext}] [{EventId}] {Message}{NewLine}{Exception}",
          "formatter": "Serilog.Formatting.Json.JsonFormatter",
          "rollingInterval": "Day"
        }
      }
    ]
  }
}

174 replies

CC#

•Created by PontiacGTX on 5/30/2023 in #help

❔ itextsharp not rendering cells for a table

I am trying to display a cell in iTextSharp Version in a second page but it does not display the cells for some reason here is the code

 float dpi = 100f;
            float widthInches = (3900f * 1.1f) / dpi;
            float heightInches = (2775f * 1.1f) / dpi;

            // Increase the size of the Rectangle object by 10%
            float width = widthInches * 1.1f * 72f;
            float height = heightInches * 1.1f * 72f;

            var pageSize = new iTextSharp.text.Rectangle(width, height);
            var rect = new iTextSharp.text.Rectangle(width, height);

            iTextSharp.text.Document document = new iTextSharp.text.Document(rect, 10f, 10f, 10f, 0f);
            iTextSharp.text.pdf.PdfWriter writer = iTextSharp.text.pdf.PdfWriter.GetInstance(document, new System.IO.FileStream(dest, System.IO.FileMode.Create));
            document.Open();

 document.NewPage();
            iTextSharp.text.Image image1 = iTextSharp.text.Image.GetInstance(model.CaraB["1"]);
            image.SetAbsolutePosition(0, 0);
            image.ScaleToFit(3400, 2400);
            document.Add(image1);

            PdfPTable table = new PdfPTable(2);
            var cell = new PdfPCell(new iTextSharp.text.Phrase("Logros"));
            cell.Colspan = 3;
            cell.HorizontalAlignment = 1;
            
            table.AddCell(cell);
            table.AddCell("Logros");
            table.AddCell("Horas");
            document.Add(table);

 float dpi = 100f;
            float widthInches = (3900f * 1.1f) / dpi;
            float heightInches = (2775f * 1.1f) / dpi;

            // Increase the size of the Rectangle object by 10%
            float width = widthInches * 1.1f * 72f;
            float height = heightInches * 1.1f * 72f;

            var pageSize = new iTextSharp.text.Rectangle(width, height);
            var rect = new iTextSharp.text.Rectangle(width, height);

            iTextSharp.text.Document document = new iTextSharp.text.Document(rect, 10f, 10f, 10f, 0f);
            iTextSharp.text.pdf.PdfWriter writer = iTextSharp.text.pdf.PdfWriter.GetInstance(document, new System.IO.FileStream(dest, System.IO.FileMode.Create));
            document.Open();

 document.NewPage();
            iTextSharp.text.Image image1 = iTextSharp.text.Image.GetInstance(model.CaraB["1"]);
            image.SetAbsolutePosition(0, 0);
            image.ScaleToFit(3400, 2400);
            document.Add(image1);

            PdfPTable table = new PdfPTable(2);
            var cell = new PdfPCell(new iTextSharp.text.Phrase("Logros"));
            cell.Colspan = 3;
            cell.HorizontalAlignment = 1;
            
            table.AddCell(cell);
            table.AddCell("Logros");
            table.AddCell("Horas");
            document.Add(table);

the output is the following: https://i.stack.imgur.com/ni8WA.png

3 replies

CC#

•Created by PontiacGTX on 5/17/2023 in #help

❔ problem trying to embed image sources with itextsharp converting html element to pdf

this code is showing that I am converting HTML TO pdf but only is able to embed the image source from the qr path which is an absolute path only located in a different folder but the other images arent showing up code in comments below

8 replies

CC#

•Created by PontiacGTX on 2/23/2023 in #help

❔ "Invalid object name '...' "

I am trying to use a Database first(model) with Reverse engineering from EF Core Power tool) but I havent applied automatic migrations or anything) but the project tells me this table doesnt have such name but indeed it does, and I am not sure what else I could try

2 replies

CC#

•Created by PontiacGTX on 2/12/2023 in #help

❔ In blazor server,in which Method should you usually implement JWT assignation

I have been wondering since I have used scaffolding por identity to receive the JWT token in J's but really the token isn't assigned on the Razor pages(scaffolding uses razor ) from the Http context into the User,since it seems to get lost as if they were using 2 different HttpContext,how would you usually do about assigning the JWT in a header with identity scaffolding?

2 replies

CC#

•Created by PontiacGTX on 1/20/2023 in #help

❔ Restoring project with DB Schema only with EF and NET Framework

I am restoring a Database from a .bak file whenever I try to query something from DB, there is a lack of attributes and the context does not use fluent api.... so what can i do to restore this project from the existing DB and Code/models entities without writing all those attributes/fluent validation?

3 replies

CC#

•Created by PontiacGTX on 12/5/2022 in #help

❔ Invalidating Claims from previous sessions claims when Logging In

I am using ASP.NET Core 2.0 AND IdentityServer(4?) and I need to invalidate the previous login when this user logins but I see that calling UpdateSecurityStampAsync logs me out from all previous login even tho I make it login once more...(this event is called everytime it logins but i dont know hwo ot invalidate the previous logins, do you mind helping me? thank you

  o.Events.OnSigningIn = async ctx =>
                     {
                         Console.WriteLine("SignIn");
                         var principal = ctx.Principal;
                         if ((ctx.Principal?.Identity is ClaimsIdentity claimIdentity))
                         {
                             var mgr = ctx.HttpContext.RequestServices.GetRequiredService<SignInManager<ApplicationUser>>();
                             var user = await mgr.UserManager.FindByNameAsync(claimIdentity.Name);
                              var res =mgr.UserManager.UpdateSecurityStampAsync(user).Result;
                             if(res.Succeeded)
                             {
                                if(!mgr.IsSignedIn(ctx.Principal))
                                 await mgr.SignInAsync(user, true);
                             }

                         }

                     };

  o.Events.OnSigningIn = async ctx =>
                     {
                         Console.WriteLine("SignIn");
                         var principal = ctx.Principal;
                         if ((ctx.Principal?.Identity is ClaimsIdentity claimIdentity))
                         {
                             var mgr = ctx.HttpContext.RequestServices.GetRequiredService<SignInManager<ApplicationUser>>();
                             var user = await mgr.UserManager.FindByNameAsync(claimIdentity.Name);
                              var res =mgr.UserManager.UpdateSecurityStampAsync(user).Result;
                             if(res.Succeeded)
                             {
                                if(!mgr.IsSignedIn(ctx.Principal))
                                 await mgr.SignInAsync(user, true);
                             }

                         }

                     };

2 replies

CC#

•Created by PontiacGTX on 11/17/2022 in #help

❔ how to logout specific user with identityserver

I am trying to logout an specific user from previous identity user sessions, so what could I do to specifically logout one user when it logins?

4 replies

CC#

•Created by PontiacGTX on 11/8/2022 in #help

❔ API doesnt return dynamic object in ASP.NET Core 2.0

I am looking to return a list from a Dynamic linq query but the problem comes when returning the list it doesnt return anything on swagger the code is like

       var result = _ctx.AccionFormativa
                         .Include(x => x.OfertaFormativa)
                         .Include(x => x.Modalidad)
                         .Include(x => x.ProgramasFormacion)
                         .Include(x => x.StatusCurso)
                         .Include(x => x.Centro)
                         .ThenInclude(x => x.DireccionCentro)
                         .Include(x => x.Ambito)
                         .GroupBy(fields, "it")
                         .ToDynamicList()
                         .Select(x => (new DynamicExpando(x)).GetCurrentObject);

       var result = _ctx.AccionFormativa
                         .Include(x => x.OfertaFormativa)
                         .Include(x => x.Modalidad)
                         .Include(x => x.ProgramasFormacion)
                         .Include(x => x.StatusCurso)
                         .Include(x => x.Centro)
                         .ThenInclude(x => x.DireccionCentro)
                         .Include(x => x.Ambito)
                         .GroupBy(fields, "it")
                         .ToDynamicList()
                         .Select(x => (new DynamicExpando(x)).GetCurrentObject);

5 replies

CC#

•Created by PontiacGTX on 11/3/2022 in #help

How to define an Anonymous type lambda parameter in Linq Expression

0 I had found in a stackoverflow post how they created an anonymous object but I would like to create a Lambda expression which select only a field within an object to be able to Group by Id currently the coude from here Linq: Group by multiple columns using Expression-tree syntax creates a new type but I would like that it could be able to work on GroupBy linq method....

  public static Type CreateNewType(List<PropertyInfo> props)
        {
            AssemblyName asmName =  typeof(Program).Assembly.GetName();
            AssemblyBuilder dynamicAssembly = AssemblyBuilder
                .DefineDynamicAssembly(asmName, AssemblyBuilderAccess.Run);
            ModuleBuilder dynamicModule = dynamicAssembly.DefineDynamicModule("MyAsm");
            TypeBuilder dynamicAnonymousType = dynamicModule
                .DefineType("MyType", TypeAttributes.Public);

            foreach (var p in props)
            {
                dynamicAnonymousType.DefineField(p.Name, p.PropertyType, FieldAttributes.Public);
            }
            return dynamicAnonymousType.CreateType();
        }

  public static Type CreateNewType(List<PropertyInfo> props)
        {
            AssemblyName asmName =  typeof(Program).Assembly.GetName();
            AssemblyBuilder dynamicAssembly = AssemblyBuilder
                .DefineDynamicAssembly(asmName, AssemblyBuilderAccess.Run);
            ModuleBuilder dynamicModule = dynamicAssembly.DefineDynamicModule("MyAsm");
            TypeBuilder dynamicAnonymousType = dynamicModule
                .DefineType("MyType", TypeAttributes.Public);

            foreach (var p in props)
            {
                dynamicAnonymousType.DefineField(p.Name, p.PropertyType, FieldAttributes.Public);
            }
            return dynamicAnonymousType.CreateType();
        }

using this type using a single field(I only need the field rather the class... groups by an entity MyType which doesnt exist...it should group by either of the entities/fields in my class linq.net-coresystem.reflection

1 replies

CC#

•Created by PontiacGTX on 11/2/2022 in #help

Incorrect dynamic lambda generation

I have setup a method to dynamically create a lambda to select a parameter and create a new object based on certain fields the code looks like when generated

Param_0 => new MyType() {Amount = Param_0.Amount, Category = Param_0.Category, PaymentMode = Param_0.PaymentMode}

Param_0 => new MyType() {Amount = Param_0.Amount, Category = Param_0.Category, PaymentMode = Param_0.PaymentMode}

but shows an error when using the compiled lambda expression.... here is the code

 public Expression<Func<TSource, object>> DynamicLambda<TSource>
       (ParameterExpression parameterExpression = null, params string[] properties)
        {
            var entityType = typeof(TSource);
            var props = properties.Select(x => entityType.GetProperty(x)).ToList();
            var source = parameterExpression ==null? Expression.Parameter(entityType, "x"): parameterExpression;

            // create x=> new myType{ prop1 = x.prop1,...}
            var newType = CreateNewType(props);
            var binding = props.Select(p => Expression.Bind(newType.GetField(p.Name),
                          Expression.Property(source, p.Name))).ToList();
            var body = Expression.MemberInit(Expression.New(newType), binding);
            var selector = Expression.Lambda<Func<TSource, object>>(body, source);
            return selector;
        }
  public static Type CreateNewType(List<PropertyInfo> props)
        {
            AssemblyName asmName = new AssemblyName("MyAsm");
            AssemblyBuilder dynamicAssembly = AssemblyBuilder
                .DefineDynamicAssembly(asmName, AssemblyBuilderAccess.Run);
            ModuleBuilder dynamicModule = dynamicAssembly.DefineDynamicModule("MyAsm");
            TypeBuilder dynamicAnonymousType = dynamicModule
                .DefineType("MyType", TypeAttributes.Public);

            foreach (var p in props)
            {
                dynamicAnonymousType.DefineField(p.Name, p.PropertyType, FieldAttributes.Public);
            }
            return dynamicAnonymousType.CreateType();
        }

 public Expression<Func<TSource, object>> DynamicLambda<TSource>
       (ParameterExpression parameterExpression = null, params string[] properties)
        {
            var entityType = typeof(TSource);
            var props = properties.Select(x => entityType.GetProperty(x)).ToList();
            var source = parameterExpression ==null? Expression.Parameter(entityType, "x"): parameterExpression;

            // create x=> new myType{ prop1 = x.prop1,...}
            var newType = CreateNewType(props);
            var binding = props.Select(p => Expression.Bind(newType.GetField(p.Name),
                          Expression.Property(source, p.Name))).ToList();
            var body = Expression.MemberInit(Expression.New(newType), binding);
            var selector = Expression.Lambda<Func<TSource, object>>(body, source);
            return selector;
        }
  public static Type CreateNewType(List<PropertyInfo> props)
        {
            AssemblyName asmName = new AssemblyName("MyAsm");
            AssemblyBuilder dynamicAssembly = AssemblyBuilder
                .DefineDynamicAssembly(asmName, AssemblyBuilderAccess.Run);
            ModuleBuilder dynamicModule = dynamicAssembly.DefineDynamicModule("MyAsm");
            TypeBuilder dynamicAnonymousType = dynamicModule
                .DefineType("MyType", TypeAttributes.Public);

            foreach (var p in props)
            {
                dynamicAnonymousType.DefineField(p.Name, p.PropertyType, FieldAttributes.Public);
            }
            return dynamicAnonymousType.CreateType();
        }

6 replies

CC#

•Created by PontiacGTX on 10/31/2022 in #help

HTTP Request throws exception when invoking controller

see attached file, I cant understand why it doesnt injects the service

6 replies

CC#

•Created by PontiacGTX on 10/28/2022 in #help

Cannot resolve constructor for String type. Using Unity container

I am sending a string to StringCon Class but it doesnt resolve when injecting into HomeController... here is the code

var con = ConfigurationManager.AppSettings["MyConnectionString"];
            var paramStringCon = new ParameterOverrides();
            container.RegisterType<StringCon>();
            container.Resolve<StringCon>(new ResolverOverride[]
            {
                new ParameterOverride("str", con)
            });
            
            var logProd = container.Resolve(typeof(Microsoft.Extensions.Logging.ILogger<ProductoRepository>));

                container.RegisterType<ProductoRepository>(nameof(ProductoRepository),
                new InjectionConstructor(container.Resolve<StringCon>(new ResolverOverride[]
            {
                new ParameterOverride("str", con)
            }), logProd));
             new UnityDependencyResolver(container);
            DependencyResolver.SetResolver(new UnityDependencyResolver(container));

var con = ConfigurationManager.AppSettings["MyConnectionString"];
            var paramStringCon = new ParameterOverrides();
            container.RegisterType<StringCon>();
            container.Resolve<StringCon>(new ResolverOverride[]
            {
                new ParameterOverride("str", con)
            });
            
            var logProd = container.Resolve(typeof(Microsoft.Extensions.Logging.ILogger<ProductoRepository>));

                container.RegisterType<ProductoRepository>(nameof(ProductoRepository),
                new InjectionConstructor(container.Resolve<StringCon>(new ResolverOverride[]
            {
                new ParameterOverride("str", con)
            }), logProd));
             new UnityDependencyResolver(container);
            DependencyResolver.SetResolver(new UnityDependencyResolver(container));

17 replies

CC#

•Created by PontiacGTX on 9/8/2022 in #help

how to implement webrtc for blazor

how can I use webrtc inside blazor server? is there a way one couuld implement it using js , maybe someoe could share me the base method used in js so i can export them?

11 replies

CC#

•Created by PontiacGTX on 8/22/2022 in #help

how to create a jwt for an existing user in identity

I am looking to create a new JWT and validate it... for using tiwht signalr. so i want to know how to fill these fields...

  app.MapPost("/Security/Token/Create",
    [AllowAnonymous]
    async ([FromBody]WebAppMeet.Data.Models.UserTokenRequest user, [FromServices] SignInManager<AppUser> signInManager)
    =>
    {
        var appUser = await signInManager.UserManager.Users.FirstOrDefaultAsync(x => x.UserName == user.UserName);

        if ((await signInManager.PasswordSignInAsync(appUser, user.Password, true, false)).Succeeded)
        {
            var issuer = builder.Configuration["Jwt:Issuer"];
            var audience = builder.Configuration["Jwt:Audience"];
            var key = Encoding.ASCII.GetBytes(builder.Configuration["Jwt:Key"]);
            var tokenDescriptor = new SecurityTokenDescriptor
            {
                Subject = new ClaimsIdentity(new[]
                {
                    new Claim("Id", Guid.NewGuid().ToString()),
                    new Claim(JwtRegisteredClaimNames.Sub, user.UserName),
                    new Claim(JwtRegisteredClaimNames.Email, user.UserName),
                    new Claim(JwtRegisteredClaimNames.Jti,Guid.NewGuid().ToString())
                 }),
                Expires = DateTime.UtcNow.AddMinutes(5),
                Issuer = issuer,
                Audience = audience,
                SigningCredentials = new SigningCredentials(new SymmetricSecurityKey(key), SecurityAlgorithms.HmacSha512Signature)
            };
            var tokenHandler = new JwtSecurityTokenHandler();
            var token = tokenHandler.CreateToken(tokenDescriptor);
            var jwtToken = tokenHandler.WriteToken(token);
            var stringToken = tokenHandler.WriteToken(token);
            return Results.Ok(stringToken);
        }
        return Results.Unauthorized();
    });

  app.MapPost("/Security/Token/Create",
    [AllowAnonymous]
    async ([FromBody]WebAppMeet.Data.Models.UserTokenRequest user, [FromServices] SignInManager<AppUser> signInManager)
    =>
    {
        var appUser = await signInManager.UserManager.Users.FirstOrDefaultAsync(x => x.UserName == user.UserName);

        if ((await signInManager.PasswordSignInAsync(appUser, user.Password, true, false)).Succeeded)
        {
            var issuer = builder.Configuration["Jwt:Issuer"];
            var audience = builder.Configuration["Jwt:Audience"];
            var key = Encoding.ASCII.GetBytes(builder.Configuration["Jwt:Key"]);
            var tokenDescriptor = new SecurityTokenDescriptor
            {
                Subject = new ClaimsIdentity(new[]
                {
                    new Claim("Id", Guid.NewGuid().ToString()),
                    new Claim(JwtRegisteredClaimNames.Sub, user.UserName),
                    new Claim(JwtRegisteredClaimNames.Email, user.UserName),
                    new Claim(JwtRegisteredClaimNames.Jti,Guid.NewGuid().ToString())
                 }),
                Expires = DateTime.UtcNow.AddMinutes(5),
                Issuer = issuer,
                Audience = audience,
                SigningCredentials = new SigningCredentials(new SymmetricSecurityKey(key), SecurityAlgorithms.HmacSha512Signature)
            };
            var tokenHandler = new JwtSecurityTokenHandler();
            var token = tokenHandler.CreateToken(tokenDescriptor);
            var jwtToken = tokenHandler.WriteToken(token);
            var stringToken = tokenHandler.WriteToken(token);
            return Results.Ok(stringToken);
        }
        return Results.Unauthorized();
    });

here is the token generation method so what do I use in Jwt:Issuer Jwt:Audience?

78 replies

CC#

•Created by PontiacGTX on 8/18/2022 in #help

Signalr not sending message(s) to specific user(s)

in the hub i have setup this signature for a method

public async Task SendMessage(string sender, string receiver, string message)
{
      await Clients.Users(sender, receiver).SendAsync("ReceiveMessage", receiver, message);
 }

public async Task SendMessage(string sender, string receiver, string message)
{
      await Clients.Users(sender, receiver).SendAsync("ReceiveMessage", receiver, message);
 }

and in the client side(the page on blazor server) i have set this up for the ReceiveMessage method

public async Task OnInitializeAsync()
{

 if(hub is null)
            hub = new HubConnectionBuilder()
                .WithUrl(_NavigationManager.ToAbsoluteUri("/ConnectionsHub"))
                .Build();
    hub.On<string, string>($"ReceiveMessage",  // this is never triggered
        async (sender, message) =>
        {
            var encodedMsg = $"{sender}: {message}";
            ChatBox.MessageList.Add(encodedMsg);
            await ChatBox.ComponentStateHasChanged();
        });
        hub.ServerTimeout = TimeSpan.FromMilliseconds(100000);
        await hub.StartAsync();
}

public async Task OnInitializeAsync()
{

 if(hub is null)
            hub = new HubConnectionBuilder()
                .WithUrl(_NavigationManager.ToAbsoluteUri("/ConnectionsHub"))
                .Build();
    hub.On<string, string>($"ReceiveMessage",  // this is never triggered
        async (sender, message) =>
        {
            var encodedMsg = $"{sender}: {message}";
            ChatBox.MessageList.Add(encodedMsg);
            await ChatBox.ComponentStateHasChanged();
        });
        hub.ServerTimeout = TimeSpan.FromMilliseconds(100000);
        await hub.StartAsync();
}

and how I call this method

private async Task SendMessage(string message)
    {
        if(string.IsNullOrEmpty(message))
        {
            await PrintMessage("Error", "Cannot send an empty message");
            return;
        }
        if (hub is not null)
        {

            foreach (var user in _UserList)
            {
                await hub.SendAsync("SendMessage", ThisUser.Email, user.User.Email,ChatBox.Message);
            }

          // await  ChatBox.ComponentStateHasChanged();
        }
    }

private async Task SendMessage(string message)
    {
        if(string.IsNullOrEmpty(message))
        {
            await PrintMessage("Error", "Cannot send an empty message");
            return;
        }
        if (hub is not null)
        {

            foreach (var user in _UserList)
            {
                await hub.SendAsync("SendMessage", ThisUser.Email, user.User.Email,ChatBox.Message);
            }

          // await  ChatBox.ComponentStateHasChanged();
        }
    }

123 replies

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