Comments by A Belal - CodeProject

A Belal 19-Dec-23 13:01pm View

Deleted

System.NullReferenceException
HResult=0x80004003
Message=Object reference not set to an instance of an object.
Source=Microsoft.EntityFrameworkCore
StackTrace:
at Microsoft.EntityFrameworkCore.Internal.EntityFinder`1.ValidateKeyPropertiesAndExtractCancellationToken(Object[] keyValues, Boolean async, CancellationToken cancellationToken)
at Microsoft.EntityFrameworkCore.Internal.EntityFinder`1.FindAsync(Object[] keyValues, CancellationToken cancellationToken)
at Microsoft.EntityFrameworkCore.Internal.InternalDbSet`1.FindAsync(Object[] keyValues)
at BL.Repositories.BaseRepository`1.<getbyidasync>d__3.MoveNext() in E:\Programming\على folder\SoqRepository\BL\Repositories\BaseRepository.cs:line 53

A Belal 19-Dec-23 12:54pm View

Notice
when i do breakPoint
and stop in every Line

the Code in this Line is appear as below

{
return LapShopContext.Set<t>().Find(id);
id = 0x00000094
}

A Belal 19-Dec-23 8:45am View

i make abreakPoint
and debug code

and Error in this Line below
public T GetById(int? id)
{
try
{
if (id.HasValue)
{
Error in this Line below
this :
return LapShopContext.Set<t>().Find(id.Value);

System.NullReferenceException
HResult=0x80004003
Message=Object reference not set to an instance of an object.
Source=Microsoft.EntityFrameworkCore
StackTrace:
at Microsoft.EntityFrameworkCore.Internal.EntityFinder`1.ValidateKeyPropertiesAndExtractCancellationToken(Object[] keyValues, Boolean async, CancellationToken cancellationToken)
at Microsoft.EntityFrameworkCore.Internal.EntityFinder`1.Find(Object[] keyValues)
at BL.Repositories.BaseRepository`1.GetById(Nullable`1 id) in E:\Programming\على شاهين كورس\SoqRepository\BL\Repositories\BaseRepository.cs:line 53

}
else
{
return null;
}
}
catch (Exception)
{
return null;
}
}

A Belal 18-Dec-23 16:47pm View

i tried your code
and Error Here

public T GetById(int? id)
{
try
{
return LapShopContext.Set<t>().Find(id); => this Line

System.NullReferenceException
HResult=0x80004003
Message=Object reference not set to an instance of an object.
Source=Microsoft.EntityFrameworkCore
StackTrace:
at Microsoft.EntityFrameworkCore.Internal.EntityFinder`1.ValidateKeyPropertiesAndExtractCancellationToken(Object[] keyValues, Boolean async, CancellationToken cancellationToken)
at Microsoft.EntityFrameworkCore.Internal.EntityFinder`1.Find(Object[] keyValues)
at BL.Repositories.BaseRepository`1.GetById(Nullable`1 id) in E:\Programming\Folder\SoqRepository\BL\Repositories\BaseRepository.cs:line 51

}
catch (Exception)
{
return null;
}
}

A Belal 18-Dec-23 16:28pm View

the same error

and
Notice
when i do breakPoint
and stop in every Line

the Code in this Line is appear as below

{
return LapShopContext.Set<t>().Find(id);
id = 0x00000094
}

in address bar https://localhost:7201/admin/item/Delete?ItemId=19

my page is
This page isn’t workingIf the problem continues, contact the site owner.
HTTP ERROR 400

A Belal 21-Nov-23 11:28am View

Controller named Values
[Route("api/[controller]")]
[ApiController]
[Authorize]
public class ValuesController : ControllerBase
{
// GET: api/<valuescontroller>
[HttpGet]
public IEnumerable<string> Get()
{
return new string[] { "value1", "value2" };
}

// GET api/<valuescontroller>/5
[HttpGet("{id}")]
public string Get(int id)
{
return "value";
}

// POST api/<valuescontroller>
[HttpPost]
public void Post([FromBody] string value)
{
}

// PUT api/<valuescontroller>/5
[HttpPut("{id}")]
public void Put(int id, [FromBody] string value)
{
}

// DELETE api/<valuescontroller>/5
[HttpDelete("{id}")]
public void Delete(int id)
{
}
}

Controller named login

[Route("api/[controller]")]
[ApiController]
public class loginController : ControllerBase
{

IConfiguration configuration;
public loginController(IConfiguration configuration)
{
this.configuration = configuration;

}

// GET: api/<login>
[HttpGet]
public IEnumerable<string> Get()
{
return new string[] { "value1", "value2" };
}

// GET api/<login>/5
[HttpGet("{id}")]
public string Get(int id)
{
return "value";
}

// POST api/<login>

[HttpPost]
[AllowAnonymous]
public IActionResult Post([FromBody] UserModel model)
{
try
{
var response = Unauthorized();

UserModel myuser = Authorize(model);

if (myuser != null)
{
var token = GenerateToken(model);
return Ok(new{token=token});
}
return response;
}
catch (Exception ex)
{

throw ex;
}

}

public string GenerateToken(UserModel user)

{

var SecurityKey = new SymmetricSecurityKey(Encoding.UTF8.GetBytes(configuration["JWT:Key"]));
var credentials = new SigningCredentials(SecurityKey, SecurityAlgorithms.HmacSha256);
var token = new JwtSecurityToken(configuration["JWT:Issuer"],
configuration["JWT:Key"], null,
expires: DateTime.Now.AddMinutes(2000),
signingCredentials: credentials);

return new JwtSecurityTokenHandler().WriteToken(token);

}

public UserModel Authorize(UserModel model)
{
try
{
if (model.UserName == "ah" && model.Password == "123")
{
return new UserModel
{

UserName = "ah",
Email = "ab5221744@gmail.com"
};

}

return null;
}
catch (Exception ex)
{

throw ex;
}

}

// PUT api/<login>/5
[HttpPut("{id}")]
public void Put(int id, [FromBody] string value)
{
}

// DELETE api/<login>/5
[HttpDelete("{id}")]
public void Delete(int id)
{
}
}

do you have any Notes

A Belal 21-Nov-23 11:27am View

Controller named Values
[Route("api/[controller]")]
[ApiController]
[Authorize]
public class ValuesController : ControllerBase
{
// GET: api/<valuescontroller>
[HttpGet]
public IEnumerable<string> Get()
{
return new string[] { "value1", "value2" };
}

// GET api/<valuescontroller>/5
[HttpGet("{id}")]
public string Get(int id)
{
return "value";
}

// POST api/<valuescontroller>
[HttpPost]
public void Post([FromBody] string value)
{
}

// PUT api/<valuescontroller>/5
[HttpPut("{id}")]
public void Put(int id, [FromBody] string value)
{
}

// DELETE api/<valuescontroller>/5
[HttpDelete("{id}")]
public void Delete(int id)
{
}
}

Controller named login

[Route("api/[controller]")]
[ApiController]
public class loginController : ControllerBase
{

IConfiguration configuration;
public loginController(IConfiguration configuration)
{
this.configuration = configuration;

}

// GET: api/<login>
[HttpGet]
public IEnumerable<string> Get()
{
return new string[] { "value1", "value2" };
}

// GET api/<login>/5
[HttpGet("{id}")]
public string Get(int id)
{
return "value";
}

// POST api/<login>

[HttpPost]
[AllowAnonymous]
public IActionResult Post([FromBody] UserModel model)
{
try
{
var response = Unauthorized();

UserModel myuser = Authorize(model);

if (myuser != null)
{
var token = GenerateToken(model);
return Ok(new{token=token});
}
return response;
}
catch (Exception ex)
{

throw ex;
}

}

public string GenerateToken(UserModel user)

{

var SecurityKey = new SymmetricSecurityKey(Encoding.UTF8.GetBytes(configuration["JWT:Key"]));
var credentials = new SigningCredentials(SecurityKey, SecurityAlgorithms.HmacSha256);
var token = new JwtSecurityToken(configuration["JWT:Issuer"],
configuration["JWT:Key"], null,
expires: DateTime.Now.AddMinutes(2000),
signingCredentials: credentials);

return new JwtSecurityTokenHandler().WriteToken(token);

}

public UserModel Authorize(UserModel model)
{
try
{
if (model.UserName == "ah" && model.Password == "123")
{
return new UserModel
{

UserName = "ah",
Email = "ab5221744@gmail.com"
};

}

return null;
}
catch (Exception ex)
{

throw ex;
}

}

// PUT api/<login>/5
[HttpPut("{id}")]
public void Put(int id, [FromBody] string value)
{
}

// DELETE api/<login>/5
[HttpDelete("{id}")]
public void Delete(int id)
{
}
}

do you have any Notes

A Belal 21-Nov-23 11:21am View

i do that now new Error is
Online
02:48:44.055
GET https://localhost:7107/api/values
Error: connect ECONNREFUSED 127.0.0.1:7107
Request Headers
User-Agent: PostmanRuntime/7.35.0
Accept: */*
Postman-Token: f73459b3-a3ed-43bb-91c9-929a082bd90f
Host: localhost:7107
Accept-Encoding: gzip, deflate, br
Connection: keep-alive
02:48:51.097
POST https://localhost:7107/api/login
Error: connect ECONNREFUSED 127.0.0.1:7107
Request Headers
Content-Type: application/json
User-Agent: PostmanRuntime/7.35.0
Accept: */*
Postman-Token: f64c27f0-331a-44d1-a5cf-d6512aff23d4
Host: localhost:7107
Accept-Encoding: gzip, deflate, br
Connection: keep-alive

A Belal 21-Nov-23 11:15am View

Richard Deeming, That's my Class Program.cs
using Microsoft.AspNetCore.Authentication.JwtBearer;
using Microsoft.AspNetCore.Authorization;
using Microsoft.IdentityModel.Tokens;
using System.Text;

var builder = WebApplication.CreateBuilder(args);

// Add services to the container.
builder.Services.AddControllersWithViews();
builder.Services.AddAuthentication(options =>
{
options.DefaultAuthenticateScheme = JwtBearerDefaults.AuthenticationScheme;
options.DefaultChallengeScheme = JwtBearerDefaults.AuthenticationScheme;
options.DefaultScheme = JwtBearerDefaults.AuthenticationScheme;
}).AddJwtBearer(o =>
{
o.TokenValidationParameters = new Microsoft.IdentityModel.Tokens.TokenValidationParameters
{
ValidIssuer = builder.Configuration["JWT:Issuer"],
ValidAudience = builder.Configuration["JWT:Audience"],
IssuerSigningKey=new SymmetricSecurityKey
(Encoding.UTF8.GetBytes(builder.Configuration["JWT:Key"])),
ValidateIssuer=true,
ValidateAudience=true,
ValidateLifetime=true,
ValidateIssuerSigningKey=true

};

});

var app = builder.Build();

// Configure the HTTP request pipeline.
if (!app.Environment.IsDevelopment())
{
app.UseExceptionHandler("/Home/Error");
// The default HSTS value is 30 days. You may want to change this for production scenarios, see https://aka.ms/aspnetcore-hsts.
app.UseHsts();
}

app.UseHttpsRedirection();
app.UseStaticFiles();
app.UseRouting();
app.UseAuthentication();
app.UseAuthorization();

app.MapControllerRoute(
name: "default",
pattern: "{controller=Home}/{action=Index}/{id?}")
.RequireAuthorization();

app.Run();

A Belal 20-Nov-23 14:21pm View

ok my best friend i will tell you , i get tokenKey from path https://localhost:7107/api/login And when i try to test token and get data from Path https://localhost:7107/api/Values
the token key work good and data comes well
but when i remove token the data continue come and didn't tell me that iam UnAuthorized
i want if i remove token from Postman the didn't come because Iam UnAuthorized

i mean when i remove token key from postman
i can't call data because i am not authorized
and infact that doesn't happen
i want to get token key from
path https://localhost:7107/api/login And when i try to test token and get data from Path https://localhost:7107/api/Values
in if i remove token key i Can't call data because iam not authorized

A Belal 12-Nov-23 14:20pm View

Ok Eng-Richard MacCutchan Can you help me

A Belal 30-Oct-23 11:55am View

Deleted

my view again @model CategoryFormViewModel

@{ViewData["Title"]=$"{(Model?.Id>0 ? "Edit" : "AddNew")} Category";}

Form elements

Forms Form elements

Default form

Basic form layout

@if (Model?.Id > 0)
{

}

@ResAdmin.lblCategoryName

@ResAdmin.lblImage

@ResGeneral.lblSave
@ResGeneral.lblNew

@if (Model != null && Model.ImageName != null)
{

}

@section Scripts
{

var Upload = {
UploadDefaultImg: function(e) {
const file = e.target.files[0];
const reader = new FileReader();
reader.onloadend = () => {
CourseMediaImgName = file.name;
CourseMediaImgBase64 = reader.result.slice(reader.result.indexOf('base64,') + 7);
$("#tbImgName").html(file.name)
$("#tbImgSrc").html(`<img class="thumbnail" src = "${reader.result}" style = "width: 200px;height: 300px;border-radius: 5px;border: 1px solid #d9d9d9;padding: 1px;" />`)
};
reader.readAsDataURL(file);
}
}

}

A Belal 8-Jul-23 10:20am View

of course i do backup

A Belal 17-Mar-23 12:33pm View

thanks more OriginalGriff , i need to return All Data and i need to learn how

Comments by A Belal (Top 14 by date)

Form elements

Default form