C# 拒绝用户访问''@本地主机（使用密码：否）
大家好，正在读这篇文章。我目前正在将我的MariaDB数据库移植到我的Raspberry Pi，它可以毫无问题地工作。但是，当我将我的C#ASP.Net核心后端也移植到Pi时，我会收到以下错误消息：C# 拒绝用户访问''@本地主机（使用密码：否）,c#,asp.net,mariadb,C#,Asp.net,Mariadb,大家好，正在读这篇文章。我目前正在将我的MariaDB数据库移植到我的Raspberry Pi，它可以毫无问题地工作。但是，当我将我的C#ASP.Net核心后端也移植到Pi时，我会收到以下错误消息： Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker[3] Route matched with {action = "Validate", controller = "User"}. Executing con
Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker[3]
Route matched with {action = "Validate", controller = "User"}. Executing controller action with signature System.Threading.Tasks.Task`1[Microsoft.AspNetCore.Mvc.JsonResult] Validate(feedback_app_backend.Models.User) on controller feedback_app_backend.Controllers.UserController (feedback_app_backend).
Access denied for user ''@'localhost' (using password: NO)
info: Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker[2]
Executed action feedback_app_backend.Controllers.UserController.Validate (feedback_app_backend) in 783.1495ms
info: Microsoft.AspNetCore.Routing.EndpointMiddleware[1]
Executed endpoint 'feedback_app_backend.Controllers.UserController.Validate (feedback_app_backend)'
fail: Microsoft.AspNetCore.Server.Kestrel[13]
Connection id "0HM0IVJDTQRVM", Request id "0HM0IVJDTQRVM:00000001": An unhandled exception was thrown by the application.
MySql.Data.MySqlClient.MySqlException (0x80004005): Access denied for user ''@'localhost' (using password: NO)
at feedback_app_backend.Controllers.UserController.Validate(User user) in C:\Users\NoChance\Desktop\feedback_app_backend\Controllers\UserController.cs:line 88
at lambda_method(Closure , Object )
at Microsoft.Extensions.Internal.ObjectMethodExecutorAwaitable.Awaiter.GetResult()
at Microsoft.AspNetCore.Mvc.Infrastructure.ActionMethodExecutor.TaskOfActionResultExecutor.Execute(IActionResultTypeMapper mapper, ObjectMethodExecutor executor, Object controller, Object[] arguments)
at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.<InvokeActionMethodAsync>g__Awaited|12_0(ControllerActionInvoker invoker, ValueTask`1 actionResultValueTask)
at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.<InvokeNextActionFilterAsync>g__Awaited|10_0(ControllerActionInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted)
at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.Rethrow(ActionExecutedContextSealed context)
at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.Next(State& next, Scope& scope, Object& state, Boolean& isCompleted)
at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.<InvokeInnerFilterAsync>g__Awaited|13_0(ControllerActionInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted)
at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeFilterPipelineAsync>g__Awaited|19_0(ResourceInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted)
at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeAsync>g__Logged|17_1(ResourceInvoker invoker)
at Microsoft.AspNetCore.Routing.EndpointMiddleware.<Invoke>g__AwaitRequestTask|6_0(Endpoint endpoint, Task requestTask, ILogger logger)
at Microsoft.AspNetCore.Authorization.AuthorizationMiddleware.Invoke(HttpContext context)
at Microsoft.AspNetCore.Server.Kestrel.Core.Internal.Http.HttpProtocol.ProcessRequests[TContext](IHttpApplication`1 application)
info: Microsoft.AspNetCore.Hosting.Diagnostics[2]
Request finished in 1351.7589ms 500
{
"Logging": {
"LogLevel": {
"Default": "Information",
"Microsoft": "Warning",
"Microsoft.Hosting.Lifetime": "Information"
}
},
"ConnectionStrings": {
"DefaultConnection": "Server=localhost;Port=3306;Database=feedbackapp;Uid=root;Pwd=mypass;"
},
"AllowedHosts": "*"
}
{
"Logging": {
"LogLevel": {
"Default": "Information",
"Microsoft": "Warning",
"Microsoft.Hosting.Lifetime": "Information"
}
},
"ConnectionStrings": {
"DefaultConnection": "Server=localhost;Database=feedbackapp;User Id=root;Password=mypass"
},
"AllowedHosts": "*"
}
{
"Logging": {
"LogLevel": {
"Default": "Information",
"Microsoft": "Warning",
"Microsoft.Hosting.Lifetime": "Information"
}
},
"ConnectionStrings": {
"DefaultConnection": "Server=localhost;Port=3307;Database=feedbackapp;Uid=root;Pwd=mypass;"
},
"AllowedHosts": "*"
}
using System;
using System.Collections.Generic;
using System.Data;
using System.Data.Common;
using System.Threading.Tasks;
using feedback_app_backend.Disposables;
using feedback_app_backend.Models;
using MySql.Data.MySqlClient;
namespace feedback_app_backend.Querys
{
public class UserQuery
{
public UserDB Db { get; }
public UserQuery(UserDB db)
{
Db = db;
}
public async Task<User> AddUserAsync(User user, CustomQuestionnaireDB questionnaireDB, FeedbackQuestionDB questionDB)
{
try
{
await questionnaireDB.Connection.OpenAsync();
}
catch (Exception ex)
{
Console.WriteLine(ex);
}
CustomQuestionnaireQuery query = new CustomQuestionnaireQuery(questionnaireDB);
User userExists = await GetUserAsync(user, questionnaireDB, questionDB).ConfigureAwait(true);
if (userExists == null)
{
//Get Questionnaire ID
CustomQuestionnaire questionnaire = new CustomQuestionnaire();
questionnaire.QuestionnareID = await query.GetNewQuestionnaireIDAsync();
User newUser = new User();
//Remove all null values
newUser = user;
newUser.QuestionnaireID = questionnaire.QuestionnareID;
newUser.Given = new List<CustomQuestionnaire>();
newUser.Received = new List<CustomQuestionnaire>();
newUser.UUID = Guid.NewGuid().ToString();
//Prepare the database
using var cmd = Db.Connection.CreateCommand();
cmd.CommandText = @"INSERT INTO user (uuid, first_name, last_name, email, pass, title, questionnaire_id, created_on)
VALUES (@uuid, @first_name, @last_name, @email, @password, @title, @questionnaire_id, @created_on);";
BindParams(cmd, newUser);
await cmd.ExecuteNonQueryAsync();
questionnaire.UUID = newUser.UUID;
FeedbackQuestionQuery questionQuery = new FeedbackQuestionQuery(questionDB);
int index = await query.CreateQuestionnaire(questionnaire, questionQuery);
if (index != -1)
{
newUser.CustomQuestionnaire = questionnaire;
await UpdateAsync(newUser);
return newUser;
}
else
{
return null;
}
}
else
{
return userExists;
}
}
public async Task<User> GetUserAsync(User user, CustomQuestionnaireDB queryDB, FeedbackQuestionDB questionDB)
{
try
{
await queryDB.Connection.OpenAsync();
}
catch (Exception)
{
Console.WriteLine("Connection is already open (UserQuery 80)");
}
CustomQuestionnaireQuery query = new CustomQuestionnaireQuery(queryDB);
using var cmd = Db.Connection.CreateCommand();
cmd.CommandText = @"SELECT uuid,first_name,last_name,email,title,questionnaire_id FROM user WHERE `email` = @email AND `pass` = @pass";
cmd.Parameters.Add(new MySqlParameter
{
ParameterName = "@email",
DbType = DbType.String,
Value = user.EMail,
});
cmd.Parameters.Add(new MySqlParameter
{
ParameterName = "@pass",
DbType = DbType.String,
Value = user.Password,
});
List<User> users = await ReadAllAsync(await cmd.ExecuteReaderAsync());
//Check if any users where found
if (users.Count > 0)
{
User _user = users[0];
CustomQuestionnaire questionnaire = await query.GetCustomQuestionnaireByUUIDAsync(_user);
//Check if user already has a questionnaire
if (questionnaire != null)
{
//Load in all Questions
questionnaire.Questions = await query.GetAllQuestionnaireQuestions(questionnaire, questionDB);
_user.CustomQuestionnaire = questionnaire;
//Set received feedback
List<CustomQuestionnaire> received = await query.GetReceivedQuestionnairesAsync(_user, questionDB);
if (received != null)
{
_user.Received = received;
}
}
return _user;
}
else
{
return null;
}
}
public async Task<User> GetUserByUUIDAsync(String uuid, CustomQuestionnaireDB queryDB, FeedbackQuestionDB questionDB)
{
using var cmd = Db.Connection.CreateCommand();
cmd.CommandText = @"SELECT uuid,first_name,last_name,email,title,questionnaire_id FROM user WHERE `uuid` = @uuid;";
cmd.Parameters.Add(new MySqlParameter
{
ParameterName = "@uuid",
DbType = DbType.String,
Value = uuid,
});
List<User> users = await ReadAllAsync(await cmd.ExecuteReaderAsync());
CustomQuestionnaireQuery query = new CustomQuestionnaireQuery(queryDB);
if (users.Count > 0)
{
User _user = users[0];
CustomQuestionnaire questionnaire = await query.GetCustomQuestionnaireByUUIDAsync(_user);
if (questionnaire != null)
{
questionnaire.Questions = await query.GetAllQuestionnaireQuestions(questionnaire, questionDB);
_user.CustomQuestionnaire = questionnaire;
}
return _user;
}
else
{
return null;
}
}
public async Task<User> GetUserByEMailAsync(String email, CustomQuestionnaireDB queryDB, FeedbackQuestionDB questionDB)
{
using var cmd = Db.Connection.CreateCommand();
cmd.CommandText = @"SELECT uuid,first_name,last_name,email,title,questionnaire_id FROM user WHERE `email` = @email;";
cmd.Parameters.Add(new MySqlParameter
{
ParameterName = "@email",
DbType = DbType.String,
Value = email,
});
List<User> users = await ReadAllAsync(await cmd.ExecuteReaderAsync());
CustomQuestionnaireQuery query = new CustomQuestionnaireQuery(queryDB);
if (users.Count > 0)
{
User _user = users[0];
CustomQuestionnaire questionnaire = await query.GetCustomQuestionnaireByUUIDAsync(_user);
if (questionnaire != null)
{
questionnaire.Questions = await query.GetAllQuestionnaireQuestions(questionnaire, questionDB);
_user.CustomQuestionnaire = questionnaire;
}
return _user;
}
else
{
return null;
}
}
public async Task<List<User>> GetAllUsersAsync(User user)
{
using var cmd = Db.Connection.CreateCommand();
cmd.CommandText = @"SELECT uuid, first_name, last_name, email, title, questionnaire_id FROM user WHERE `email` <> @email";
cmd.Parameters.Add(new MySqlParameter
{
ParameterName = "@email",
DbType = DbType.String,
Value = user.EMail,
});
List<User> result = await ReadAllAsync(await cmd.ExecuteReaderAsync());
return result.Count > 0 ? result : null;
}
private async Task<List<User>> ReadAllAsync(DbDataReader reader)
{
List<User> users = new List<User>();
using (reader)
{
while (await reader.ReadAsync())
{
var user = new User()
{
UUID = reader.GetString(0),
FirstName = reader.GetString(1),
LastName = reader.GetString(2),
EMail = reader.GetString(3),
Title = reader.GetString(4),
QuestionnaireID = reader.GetInt32(5)
};
users.Add(user);
}
}
return users;
}
public async Task UpdateAsync(User user)
{
using var cmd = Db.Connection.CreateCommand();
cmd.CommandText = @"UPDATE user SET `first_name` = @first_name, `last_name` = @last_name, `email` = @email, `title` = @title, "
+ "`questionnaire_id` = @questionnaire_id, `created_on` = @created_on WHERE `uuid` = @uuid;";
BindParams(cmd, user);
await cmd.ExecuteNonQueryAsync();
}
public async Task DeleteUserAsync(User user)
{
using var cmd = Db.Connection.CreateCommand();
cmd.CommandText = @"DELETE FROM user WHERE `uuid` = @uuid;";
BindParams(cmd, user);
await cmd.ExecuteNonQueryAsync();
}
private void BindParams(MySqlCommand cmd, User user)
{
cmd.Parameters.Add(new MySqlParameter
{
ParameterName = "@uuid",
DbType = DbType.String,
Value = user.UUID,
});
cmd.Parameters.Add(new MySqlParameter
{
ParameterName = "@first_name",
DbType = DbType.String,
Value = user.FirstName,
});
cmd.Parameters.Add(new MySqlParameter
{
ParameterName = "@last_name",
DbType = DbType.String,
Value = user.LastName,
});
cmd.Parameters.Add(new MySqlParameter
{
ParameterName = "@email",
DbType = DbType.String,
Value = user.EMail,
});
cmd.Parameters.Add(new MySqlParameter
{
ParameterName = "@password",
DbType = DbType.String,
Value = user.Password,
});
cmd.Parameters.Add(new MySqlParameter
{
ParameterName = "@title",
DbType = DbType.String,
Value = user.Title,
});
cmd.Parameters.Add(new MySqlParameter
{
ParameterName = "@questionnaire_id",
DbType = DbType.Int32,
Value = user.QuestionnaireID,
});
cmd.Parameters.Add(new MySqlParameter
{
ParameterName = "@created_on",
DbType = DbType.Int64,
Value = user.CreatedOn,
});
}
}
}
public void ConfigureServices(IServiceCollection services)
{
services.AddSingleton<IConfiguration>(Configuration);
services.AddControllers();
services.AddTransient<UserDB>(_ => new UserDB(Configuration["ConnectionStrings:DefaultConnection"]));
services.AddTransient<CustomQuestionnaireDB>(_ => new CustomQuestionnaireDB(Configuration["ConnectionStrings:DefaultConnection"]));
services.AddTransient<FeedbackQuestionDB>(_ => new FeedbackQuestionDB(Configuration["ConnectionStrings:DefaultConnection"]));
}
public void配置服务（IServiceCollection服务）
{
services.AddSingleton（配置）；
services.AddControllers（）；
AddTransient（=>newuserdb（配置[“ConnectionString:DefaultConnection”]）；
AddTransient（=>new CustomQuestionnaireDB（配置[“ConnectionString:DefaultConnection”]）；
AddTransient（=>newfeedbackQuestionDB（配置[“ConnectionString:DefaultConnection”]）；
}
public void ConfigureServices(IServiceCollection services)
{
services.AddSingleton<IConfiguration>(Configuration);
services.AddControllers();
services.AddTransient<UserDB>(_ => new UserDB(Configuration["Server=localhost;Port=3307;Database=feedbackapp;Uid=root;Pwd=mypass;"]));
services.AddTransient<CustomQuestionnaireDB>(_ => new CustomQuestionnaireDB(Configuration["Server=localhost;Port=3307;Database=feedbackapp;Uid=root;Pwd=mypass;"]));
services.AddTransient<FeedbackQuestionDB>(_ => new FeedbackQuestionDB(Configuration["Server=localhost;Port=3307;Database=feedbackapp;Uid=root;Pwd=mypass;"]));
}
public void配置服务（IServiceCollection服务）
{
services.AddSingleton（配置）；
services.AddControllers（）；
AddTransient（=>newuserdb（配置[“服务器=localhost；端口=3307；数据库=feedbackapp；Uid=root；Pwd=mypass；”]）；
AddTransient（=>newcustomQuestionnairedb（配置[“服务器=本地主机；端口=3307；数据库=反馈应用程序；Uid=根；Pwd=mypass；”））；
AddTransient（=>newfeedbackQuestionDB（配置[“服务器=localhost；端口=3307；数据库=feedbackapp；Uid=root；Pwd=mypass；”））；
}
using System;
using MySql.Data.MySqlClient;
namespace feedback_app_backend.Disposables
{
public class CustomQuestionnaireDB : IDisposable
{
MySqlConnection conn = new MySqlConnection("server=localhost;user id=user;password=mypass;database=mydb");
public MySqlConnection Connection { get; }
public CustomQuestionnaireDB()
{
Connection = new MySqlConnection(conn.ConnectionString);
}
public void Dispose() => Connection.Dispose();
}
}
您似乎在使用MSSQL连接字符串，但使用的是MySql DB后端。。这两种产品截然不同。我还尝试了这个字符串：Server=localhost；端口=3306；数据库=反馈应用程序；Uid=根；密码=[密码]；同样的错误请记住，当我在我的机器上托管这个字符串时，我可以连接它，但它在覆盆子上不起作用。我使用的是MariaDB，所以我可能应该使用上面的字符串。可能是因为我使用了MySqlConnector for asp.net而导致了这个问题？@Jawad我在这里使用的是：这是和以前一样的错误吗？您可以共享用于连接的代码吗？以下是链接，以了解更多信息：
using System;
using MySql.Data.MySqlClient;
namespace feedback_app_backend.Disposables
{
public class CustomQuestionnaireDB : IDisposable
{
MySqlConnection conn = new MySqlConnection("server=localhost;user id=user;password=mypass;database=mydb");
public MySqlConnection Connection { get; }
public CustomQuestionnaireDB()
{
Connection = new MySqlConnection(conn.ConnectionString);
}
public void Dispose() => Connection.Dispose();
}
}