哦,哇,显然不是EF或配置问题。
Somehow the .razor page variable assigment is messing up the data.
现在不确定如何继续该问题,但是我至少编辑了标题以反映当前问题,即:在为字符串分配特殊字符时,剃刀页面弄乱了编码。
无论我做什么,我插入MySQL 5.7.17数据库的字符始终显示为�:
尽管有类似的帖子,但没有一种解决方案对我有用,我已经用尽了我的研究能力。
连接字符串上的“ charset = utf8mb4”和“ SET” character_set_connection” SQL命令: When using Entity Framework with MySQL, Unicode characters are replaced with basic characters
使用“ utf8mb4”: MySQL charset=UTF-8 with ConnectionReset=True is not working
数据注释,例如[MySqlCharset(“ utf8mb4”)]:https://dev.mysql.com/doc/connector-net/en/connector-net-entityframework-core-charset.html
查询值的前缀N: MySQL C# Text Encoding Problems
连接字符串:
"MySQL": "server=localhost;user=root;database=sgn;charset=utf8mb4;"
UserModel.cs
namespace source.Data.Models
{
[MySqlCharset("utf8mb4")]
[MySqlCollation("utf8mb4_unicode_ci")]
public class UserModel
{
public UserModel() { }
[Key]
public long Id { get; set; }
[MySqlCharset("utf8mb4")]
[MySqlCollation("utf8mb4_unicode_ci")]
public string Username { get; set; }
public string Email { get; set; }
public string Password { get; set; }
public string FirstName { get; set; }
public string LastName { get; set; }
public string Language { get; set; }
public string StartPage { get; set; }
}
}
DatabaseContext.cs
namespace source.Data.Database
{
public class DatabaseContext : DbContext
{
private IConfiguration Configuration;
public DbSet<UserModel> Users { get; set; }
public DatabaseContext(DbContextOptions<DatabaseContext> options, IConfiguration configuration)
: base(options)
{
Configuration = configuration;
}
protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
{
optionsBuilder
.UseMySQL(Configuration.GetSection("AppSettings").GetSection("Database").GetSection("ConnectionString")["MySQL"]);
}
protected override void OnModelCreating(ModelBuilder modelBuilder)
{
modelBuilder.Entity<UserModel>().Property(p => p.Username).IsUnicode(true);
base.OnModelCreating(modelBuilder);
}
}
}
DesignTimeDatabaseContextFactory.cs
namespace source.Data.Database
{
public class DesignTimeDatabaseContextFactory : IDesignTimeDbContextFactory<DatabaseContext>
{
private IConfiguration Configuration;
private AppSettingsService AppSettings;
public DesignTimeDatabaseContextFactory()
{
}
public DesignTimeDatabaseContextFactory(IConfiguration configuration, AppSettingsService appSettings)
{
Configuration = configuration;
AppSettings = appSettings;
}
public DatabaseContext CreateDbContext(string[] args)
{
var builder = new DbContextOptionsBuilder<DatabaseContext>();
builder.UseMySQL(AppSettings.ConnectionString);
return new DatabaseContext(builder.Options, Configuration);
}
}
}
Create.razor-这是将用户添加到数据库的地方。请注意,该项目使用Blazor,因此请不要与“ @functions”标签混淆。这两个函数均未正确添加数据,并且注释的是我尝试过的准备好的语句。
<div class="login_form">
<h3>Create Account</h3>
<button @onclick="@(e => AddEntry())">Add DB User!</button><br />
<button @onclick="@(e => AddEntry2())">Add TEST!</button><br />
</div>
@functions {
void AddEntry2()
{
UserModel test = new UserModel();
test.Username = "Test çã";
test.FirstName = "Michel";
test.LastName = "Arendt";
test.Email = "mail@gmail.com";
test.Password = "123";
test.Language = "pt-BR";
test.StartPage = "/Home/";
db.Database.ExecuteSqlCommand("SET NAMES utf8mb4");
db.Database.ExecuteSqlCommand("SET character_set_connection = utf8mb4");
db.Database.ExecuteSqlCommand("INSERT INTO Users (Username) VALUES (N'" + test.Username + "')");
db.SaveChanges();
//using (SqlConnection connection = new SqlConnection(AppSettings.DatabaseConnectionString()))
//{
// connection.Open();
// SqlCommand command = new SqlCommand(null, connection);
// // Create and prepare an SQL statement.
// command.CommandText =
// "INSERT INTO Users (Username) " +
// "VALUES (@username)";
// SqlParameter username = new SqlParameter("@username", SqlDbType.NVarChar, 100);
// username.Value = "Garçon";
// command.Parameters.Add(username);
// // Call Prepare after setting the Commandtext and Parameters.
// command.Prepare();
// command.ExecuteNonQuery();
//}
}
void AddEntry()
{
UserModel waitress = new UserModel();
waitress.Username = "Garçon";
waitress.FirstName = "Test";
waitress.LastName = "Test";
waitress.Email = "mail@gmail.com";
waitress.Password = "123";
waitress.Language = "pt-BR";
waitress.StartPage = "/Home/";
db.Users.Add(waitress);
db.SaveChanges();
}
}
source.csproj(依赖关系参考)
<Project Sdk="Microsoft.NET.Sdk.Web">
<PropertyGroup>
<TargetFramework>netcoreapp3.0</TargetFramework>
<LangVersion>7.3</LangVersion>
<RestorePackages>false</RestorePackages>
<Version>0.10.0</Version>
<Authors>Michel Arendt</Authors>
<Product>SGN</Product>
</PropertyGroup>
<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|AnyCPU'">
<DefineConstants>DEBUG;TRACE</DefineConstants>
<DebugType>full</DebugType>
<DebugSymbols>true</DebugSymbols>
</PropertyGroup>
<ItemGroup>
<Content Remove="compilerconfig.json" />
</ItemGroup>
<ItemGroup>
<None Include="compilerconfig.json" />
</ItemGroup>
<ItemGroup>
<PackageReference Include="ElectronNET.API" Version="5.22.13" />
<PackageReference Include="Microsoft.EntityFrameworkCore" Version="2.2.4" />
<PackageReference Include="Microsoft.EntityFrameworkCore.SqlServer" Version="2.2.4" />
<PackageReference Include="Microsoft.EntityFrameworkCore.Tools" Version="2.2.4">
<PrivateAssets>all</PrivateAssets>
<IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
</PackageReference>
<PackageReference Include="Microsoft.Extensions.Configuration.Json" Version="2.2.0" />
<PackageReference Include="Microsoft.Extensions.DependencyInjection" Version="3.0.0-preview6.19304.6" />
<PackageReference Include="Microsoft.Extensions.Options.ConfigurationExtensions" Version="2.2.0" />
<PackageReference Include="MySql.Data.EntityFrameworkCore" Version="8.0.16" />
<PackageReference Include="System.Configuration.ConfigurationManager" Version="4.5.0" />
</ItemGroup>
<ItemGroup>
<Content Update="electron.manifest.json">
<CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
</Content>
</ItemGroup>
</Project>
数据库和列的默认排序规则和字符集分别是utf8mb4_unicode_ci和utf8mb4:
Default database character set and collation
Columns character set and collation
关于为解决该问题或我正在犯的错误还有哪些尝试?
谢谢!
按照Bradley Grainger的建议(在评论中),我切换到了 Pomelo.EntityFrameworkCore.MySql ,但这无助于解决该问题。我更改过的文件现在是:
将构建从 Startup.cs 和 DesignTimeDatabaseContextFactory.cs 更改为使用:
builder
.UseMySql(AppSettings.ConnectionString,
mysqlOptions =>
{
mysqlOptions
.CharSetBehavior(CharSetBehavior.AppendToAllColumns)
.AnsiCharSet(CharSet.Utf8mb4)
.UnicodeCharSet(CharSet.Utf8mb4);
});
创建剃刀
void AddEntry2()
{
UserModel test = new UserModel();
test.Username = "Test çã";
test.FirstName = "Michel";
test.LastName = "Arendt";
test.Email = "mail@gmail.com";
test.Password = "123";
test.Language = "pt-BR";
test.StartPage = "/Home/";
using (MySqlConnection connection = new MySqlConnection(AppSettings.ConnectionString))
{
connection.Open();
MySqlCommand command = new MySqlCommand(null, connection);
// Create and prepare an SQL statement.
command.CommandText =
"INSERT INTO Users (Username) " +
"VALUES (@username)";
MySqlParameter username = new MySqlParameter("@username", MySqlDbType.LongText, 100);
username.Value = "Garçon";
command.Parameters.Add(username);
// Call Prepare after setting the Commandtext and Parameters.
command.Prepare();
command.ExecuteNonQuery();
}
}
认为这会有所帮助,因此我还在本地服务器上将MySQL初始化(my.ini)设置为:
[mysqld]
character-set-server=utf8mb4
collation-server=utf8mb4_general_ci
但是,没有任何效果。还有其他想法吗?
要弄清是数据库还是EF Core问题,我设置了一个简单的PHP脚本在数据库中插入相同的条目。
On this image entry 1 and 2 are inserted from EF Core while entry 3 was inserted from PHP
从图像中可以看出,由于PHP的插入工作正常,数据库似乎很好。
添加条目时如何确保EF Core使用“ utf8mb4”编码?
答案 0 :(得分:1)
正如Thomas Schmidt在OP的评论中所建议的那样,这个问题是我从未想到过的其他地方,这是Visual Studio保存文件所使用的编码。该问题的解决方案描述如下:
razor view » character rendered as »
选择要更改其编码的文件,然后单击文件菜单,然后将“ PAGE”另存为,然后选择Save with Encoding...并选择所需的编码。
我已编辑帖子的问题标题以反映当前问题。让我知道是否应该将其改回,因为我不确定如何继续进行操作。