不正确的字符串值：第 1 行的 'DisplayName' 列的“\xD8\xA7\xD9\x84\xD8\xB9...”

Question

我在运行服务器端代码时遇到以下异常。

FATAL 2018-04-25 14:41:59,757 [1    ] Abp.AbpBootstrapper             
- Microsoft.EntityFrameworkCore.DbUpdateException: An error occurred while updating the entries. See the inner exception for details. --->
MySql.Data.MySqlClient.MySqlException: Incorrect string value:
'\xD8\xA7\xD9\x84\xD8\xB9...' for column 'DisplayName' at row 1 --->
MySql.Data.MySqlClient.MySqlException: Incorrect string value:
'\xD8\xA7\xD9\x84\xD8\xB9...' for column 'DisplayName' at row 1    at
System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()    at
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task
task)    at
System.Runtime.CompilerServices.ConfiguredValueTaskAwaitable`1.ConfiguredValueTaskAwaiter.GetResult()
at
MySqlConMyCompanytor.Core.ResultSet.<ReadResultSetHeaderAsync>d__1.MoveNext()
in
C:\projects\mysqlconMyCompanytor\src\MySqlConMyCompanytor\Core\ResultSet.cs:line
43    --- End of inner exception stack trace ---    at
MySql.Data.MySqlClient.MySqlDataReader.ActivateResultSet(ResultSet
resultSet) in
C:\projects\mysqlconMyCompanytor\src\MySqlConMyCompanytor\MySql.Data.MySqlClient\MySqlDataReader.cs:line
92    at
MySql.Data.MySqlClient.MySqlDataReader.<ReadFirstResultSetAsync>d__65.MoveNext()
in
C:\projects\mysqlconMyCompanytor\src\MySqlConMyCompanytor\MySql.Data.MySqlClient\MySqlDataReader.cs:line
297
--- End of stack trace from previous location where exception was thrown ---    at
System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()    at
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task
task)    at
MySql.Data.MySqlClient.MySqlDataReader.<CreateAsync>d__64.MoveNext()
in
C:\projects\mysqlconMyCompanytor\src\MySqlConMyCompanytor\MySql.Data.MySqlClient\MySqlDataReader.cs:line
287
--- End of stack trace from previous location where exception was thrown ---    at
System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()    at
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task
task)    at
MySqlConMyCompanytor.Core.TextCommandExecutor.<ExecuteReaderAsync>d__3.MoveNext()
in
C:\projects\mysqlconMyCompanytor\src\MySqlConMyCompanytor\Core\TextCommandExecutor.cs:line
70
--- End of stack trace from previous location where exception was thrown ---    at
System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()    at
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task
task)    at
MySql.Data.MySqlClient.MySqlCommand.ExecuteDbDataReader(CommandBehavior
behavior) in
C:\projects\mysqlconMyCompanytor\src\MySqlConMyCompanytor\MySql.Data.MySqlClient\MySqlCommand.cs:line
172    at
Microsoft.EntityFrameworkCore.Storage.Internal.MySqlRelationalCommand.<ExecuteAsync>d__3.MoveNext()
--- End of stack trace from previous location where exception was thrown ---    at
System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()    at
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task
task)    at
Microsoft.EntityFrameworkCore.Storage.Internal.MySqlRelationalCommand.Execute(IRelationalConMyCompanytion
conMyCompanytion, DbCommandMethod executeMethod, IReadOnlyDictionary`2
parameterValues)    at
Microsoft.EntityFrameworkCore.Storage.Internal.RelationalCommand.ExecuteReader(IRelationalConMyCompanytion
conMyCompanytion, IReadOnlyDictionary`2 parameterValues)    at
Microsoft.EntityFrameworkCore.Update.ReaderModificationCommandBatch.Execute(IRelationalConMyCompanytion
conMyCompanytion)    --- End of inner exception stack trace ---    at
Microsoft.EntityFrameworkCore.Update.ReaderModificationCommandBatch.Execute(IRelationalConMyCompanytion
conMyCompanytion)    at
Microsoft.EntityFrameworkCore.Update.Internal.MySqlBatchExecutor.Execute(IEnumerable`1
commandBatches, IRelationalConMyCompanytion conMyCompanytion)    at
Microsoft.EntityFrameworkCore.Storage.RelationalDatabase.SaveChanges(IReadOnlyList`1
entries)    at
Microsoft.EntityFrameworkCore.ChangeTracking.Internal.StateManager.SaveChanges(IReadOnlyList`1
entriesToSave)    at
Microsoft.EntityFrameworkCore.ChangeTracking.Internal.StateManager.SaveChanges(Boolean
acceptAllChangesOnSuccess)    at
Microsoft.EntityFrameworkCore.DbContext.SaveChanges(Boolean
acceptAllChangesOnSuccess)    at
Abp.EntityFrameworkCore.AbpDbContext.SaveChanges() in
D:\Github\aspnetboilerplate\src\Abp.EntityFrameworkCore\EntityFrameworkCore\AbpDbContext.cs:line
198    at
Abp.Zero.EntityFrameworkCore.AbpZeroCommonDbContext`3.SaveChanges() in
D:\Github\aspnetboilerplate\src\Abp.ZeroCore.EntityFrameworkCore\Zero\EntityFrameworkCore\AbpZeroCommonDbContext.cs:line
154    at
MyCompany.MyProject.EntityFrameworkCore.Seed.Host.DefaultLanguagesCreator.AddLanguageIfNotExists(ApplicationLanguage
language) in
C:\Users\MyName\Source\Workspaces\Workspace\FoodKioskSolution\MyCompany.MyProject\src\MyCompany.MyProject.EntityFrameworkCore\EntityFrameworkCore\Seed\Host\DefaultLanguagesCreator.cs:line
59    at
MyCompany.MyProject.EntityFrameworkCore.Seed.Host.DefaultLanguagesCreator.CreateLanguages()
in
C:\Users\MyName\Source\Workspaces\Workspace\FoodKioskSolution\MyCompany.MyProject\src\MyCompany.MyProject.EntityFrameworkCore\EntityFrameworkCore\Seed\Host\DefaultLanguagesCreator.cs:line
47    at
MyCompany.MyProject.EntityFrameworkCore.Seed.Host.DefaultLanguagesCreator.Create()
in
C:\Users\MyName\Source\Workspaces\Workspace\FoodKioskSolution\MyCompany.MyProject\src\MyCompany.MyProject.EntityFrameworkCore\EntityFrameworkCore\Seed\Host\DefaultLanguagesCreator.cs:line
40    at
MyCompany.MyProject.EntityFrameworkCore.Seed.Host.InitialHostDbBuilder.Create()
in
C:\Users\MyName\Source\Workspaces\Workspace\FoodKioskSolution\MyCompany.MyProject\src\MyCompany.MyProject.EntityFrameworkCore\EntityFrameworkCore\Seed\Host\InitialHostDbBuilder.cs:line
15    at
MyCompany.MyProject.EntityFrameworkCore.Seed.SeedHelper.SeedHostDb(MyProjectDbContext
context) in
C:\Users\MyName\Source\Workspaces\Workspace\FoodKioskSolution\MyCompany.MyProject\src\MyCompany.MyProject.EntityFrameworkCore\EntityFrameworkCore\Seed\SeedHelper.cs:line
25    at
MyCompany.MyProject.EntityFrameworkCore.Seed.SeedHelper.WithDbContext[TDbContext](IIocResolver
iocResolver, Action`1 contextAction) in
C:\Users\MyName\Source\Workspaces\Workspace\FoodKioskSolution\MyCompany.MyProject\src\MyCompany.MyProject.EntityFrameworkCore\EntityFrameworkCore\Seed\SeedHelper.cs:line
41    at
MyCompany.MyProject.EntityFrameworkCore.Seed.SeedHelper.SeedHostDb(IIocResolver
iocResolver) in
C:\Users\MyName\Source\Workspaces\Workspace\FoodKioskSolution\MyCompany.MyProject\src\MyCompany.MyProject.EntityFrameworkCore\EntityFrameworkCore\Seed\SeedHelper.cs:line
17    at
MyCompany.MyProject.EntityFrameworkCore.MyProjectEntityFrameworkModule.PostInitialize()
in
C:\Users\MyName\Source\Workspaces\Workspace\FoodKioskSolution\MyCompany.MyProject\src\MyCompany.MyProject.EntityFrameworkCore\EntityFrameworkCore\MyProjectEntityFrameworkModule.cs:line
46    at System.Collections.Generic.List`1.ForEach(Action`1 action)   
at Abp.AbpBootstrapper.Initialize() in
D:\Github\aspnetboilerplate\src\Abp\AbpBootstrapper.cs:line 155

异常在文件 DefaultLanguagesCreator.cs:

using System.Collections.Generic;
using System.Linq;
using Microsoft.EntityFrameworkCore;
using Abp.Localization;

namespace MyCompany.MyProject.EntityFrameworkCore.Seed.Host
{
    public class DefaultLanguagesCreator
    {
        public static List<ApplicationLanguage> InitialLanguages => GetInitialLanguages();

        private readonly SparDbContext _context;

        private static List<ApplicationLanguage> GetInitialLanguages()
        {
            return new List<ApplicationLanguage>
            {
                new ApplicationLanguage(null, "en", "English", "famfamfam-flags gb"),
                new ApplicationLanguage(null, "ar", "???????", "famfamfam-flags sa"),
                new ApplicationLanguage(null, "de", "German", "famfamfam-flags de"),
                new ApplicationLanguage(null, "it", "Italiano", "famfamfam-flags it"),
                new ApplicationLanguage(null, "fr", "Français", "famfamfam-flags fr"),
                new ApplicationLanguage(null, "pt-BR", "Portuguese", "famfamfam-flags br"),
                new ApplicationLanguage(null, "tr", "Türkçe", "famfamfam-flags tr"),
                new ApplicationLanguage(null, "ru", "???????", "famfamfam-flags ru"),
                new ApplicationLanguage(null, "zh-CN", "????", "famfamfam-flags cn"),
                new ApplicationLanguage(null, "es-MX", "Español México", "famfamfam-flags mx"),
                new ApplicationLanguage(null, "nl", "Nederlands", "famfamfam-flags nl"),
                new ApplicationLanguage(null, "ja", "???", "famfamfam-flags jp")
            };
        }

        public DefaultLanguagesCreator(SparDbContext context)
        {
            _context = context;
        }

        public void Create()
        {
            CreateLanguages();
        }

        private void CreateLanguages()
        {
            foreach (var language in InitialLanguages)
            {
                AddLanguageIfNotExists(language);
            }
        }

        private void AddLanguageIfNotExists(ApplicationLanguage language)
        {
            if (_context.Languages.IgnoreQueryFilters().Any(l => l.TenantId == language.TenantId && l.Name == language.Name))
            {
                return;
            }

            _context.Languages.Add(language);
            _context.SaveChanges();
        }
    }
}

阿拉伯语例外。

Answer 1

您的 SQL 中有错误，尤其是您尝试分配的 varchar。可能原因：

您在应用程序中使用的编码可能与您的字段所期望的编码不同
您可能正在尝试插入一个比您的字段允许的最大长度更长的 varchar

Answer 2

您正在使用带有 mysql 的 aspnetboilerplate，以避免这些错误：在迁移之前，尝试更改 MySQL 数据库 table 编码。所有 table 都应该是 UTF-8 (utf8_unicode_ci)。

注意：如果出现 "Specified key was too long; max key length is 1000 bytes" 错误运行迁移尝试将 my.ini

中的默认存储引擎更改为 InnoDB

Answer 3

感谢@Dalton 和@Lajos 的建议，这确实有助于解决问题。

根据您的建议，我找到了解决方案。这不是 EF Core 问题，它是我 MySql 中配置的默认排序规则。因此，您必须更改数据库的默认排序规则。我在数据库中有 latin1 - default collation"，这对于插入 Unicode 和非英语单词没有用，请运行下面的查询来更改排序规则数据库的所有表。

SELECT CONCAT("ALTER TABLE `", TABLE_NAME,"` convert to character set utf8 collate utf8_unicode_ci;") AS    mySQL
FROM INFORMATION_SCHEMA.TABLES
WHERE TABLE_SCHEMA="<YouDatabaseName>"
AND TABLE_TYPE="BASE TABLE"

如果你不想在MySQL中运行这个查询，那么你可以在代码迁移中添加上面的脚本。

Answer 4

将您的数据库和所有表分类为“utf8_unicode_ci” 您可以手动执行此操作或执行此查询：

数据库：

ALTER DATABASE <database-name> CHARACTER SET utf8 COLLATE utf8_unicode_ci;

表格：

 ALTER TABLE <table-name> CHARACTER SET utf8 COLLATE utf8_unicode_ci;

这里 link 包含更多详细信息和分步指南

不正确的字符串值：第 1 行的 'DisplayName' 列的“\xD8\xA7\xD9\x84\xD8\xB9...”

Incorrect string value: '\xD8\xA7\xD9\x84\xD8\xB9...' for column 'DisplayName' at row 1

c#

mysql

collation

asp.net-boilerplate

aspnetboilerplate