我正在尝试在我的 C# .Net 应用程序中连接到 MySQL 数据库

尝试连接时出现此错误:不支持关键字:“端口”。

错误似乎表明我的连接字符串有问题

<add name="mydataEntities" connectionString="server=myserver.com;port=3306;password=xxxx;user id=yyyy;database= mydatabase;persistsecurityinfo=True" providerName="MySql.Data.MySqlClient" />

我已添加引用: MySql.Data 6.9.7.0(MySQL 的 ADO.Net 驱动程序) 和 MySql.Data.Entity.EF6 6.9.7.0(支持 Entity Framework 6.0)

在我的配置中我有:

  <entityFramework>
    <defaultConnectionFactory type="System.Data.Entity.Infrastructure.LocalDbConnectionFactory, EntityFramework">
      <parameters>
        <parameter value="mssqllocaldb" />
      </parameters>
    </defaultConnectionFactory>
    <providers>
            <provider invariantName="MySql.Data.MySqlClient" type="MySql.Data.MySqlClient.MySqlProviderServices, MySql.Data.Entity.EF6, Culture=neutral, PublicKeyToken=c5687fc88969c44d">
      </provider>
    </providers>
  </entityFramework>

<dependentAssembly>
        <assemblyIdentity name="MySql.Data" publicKeyToken="c5687fc88969c44d" culture="neutral" />
        <bindingRedirect oldVersion="0.0.0.0-6.9.7.0" newVersion="6.9.7.0" />
 </dependentAssembly>

<system.data>
    <DbProviderFactories>
      <remove invariant="MySql.Data.MySqlClient" />
      <add name="MySQL Data Provider" invariant="MySql.Data.MySqlClient" description=".Net Framework Data Provider for MySQL" type="MySql.Data.MySqlClient.MySqlClientFactory, MySql.Data, Version=6.9.7.0, Culture=neutral, PublicKeyToken=c5687fc88969c44d" />
    </DbProviderFactories>
  </system.data>

连接字符串在这里设置:

public class Repository
    {
        protected mydataEntities DbContext;

        public Repository()
        {

            DbContext = new mydataEntities (ConfigurationManager.ConnectionStrings["mydataEntities"].ConnectionString);
        }
}

我注意到堆栈跟踪似乎正在使用 System.Data.SqlClient 提供程序，如下所示:

我已经删除了 MySql.Data 和 MySql.Data.Entity.EF6 引用，清理解决方案，添加回引用然后重建......

谁能帮我找出这个错误的根源？

为什么 MySQL 连接器没有使用我的配置中指定的 providerName: MySql.Data.MySqlClient。

   at System.Data.Common.DbConnectionOptions.ParseInternal(Hashtable parsetable, String connectionString, Boolean buildChain, Hashtable synonyms, Boolean firstKey)
   at System.Data.Common.DbConnectionOptions..ctor(String connectionString, Hashtable synonyms, Boolean useOdbcRules)
   at System.Data.SqlClient.SqlConnectionString..ctor(String connectionString)
   at System.Data.SqlClient.SqlConnectionFactory.CreateConnectionOptions(String connectionString, DbConnectionOptions previous)
   at System.Data.ProviderBase.DbConnectionFactory.GetConnectionPoolGroup(DbConnectionPoolKey key, DbConnectionPoolGroupOptions poolOptions, DbConnectionOptions& userConnectionOptions)
   at System.Data.SqlClient.SqlConnection.ConnectionString_Set(DbConnectionPoolKey key)
   at System.Data.SqlClient.SqlConnection.set_ConnectionString(String value)
   at System.Data.SqlClient.SqlConnection..ctor(String connectionString, SqlCredential credential)
   at System.Data.SqlClient.SqlConnection..ctor(String connectionString)
   at System.Data.Entity.Infrastructure.SqlConnectionFactory.CreateConnection(String nameOrConnectionString)
   at System.Data.Entity.Infrastructure.LocalDbConnectionFactory.CreateConnection(String nameOrConnectionString)
   at System.Data.Entity.Internal.LazyInternalConnection.Initialize()
   at System.Data.Entity.Internal.LazyInternalConnection.get_ProviderName()
   at System.Data.Entity.Internal.LazyInternalContext.get_ProviderName()
   at System.Data.Entity.Internal.DefaultModelCacheKeyFactory.Create(DbContext context)
   at System.Data.Entity.Internal.LazyInternalContext.InitializeContext()
   at System.Data.Entity.Internal.InternalContext.Initialize()
   at System.Data.Entity.Internal.InternalContext.GetEntitySetAndBaseTypeForType(Type entityType)
   at System.Data.Entity.Internal.Linq.InternalSet`1.Initialize()
   at System.Data.Entity.Internal.Linq.InternalSet`1.GetEnumerator()
   at System.Data.Entity.Infrastructure.DbQuery`1.System.Collections.Generic.IEnumerable<TResult>.GetEnumerator()
   at System.Linq.Enumerable.WhereSelectEnumerableIterator`2.MoveNext()
   at System.Collections.Generic.List`1..ctor(IEnumerable`1 collection)
   at System.Linq.Enumerable.ToList[TSource](IEnumerable`1 source)

最佳答案

解决方法如下:

我从覆盖基础连接字符串的分部类中删除了以下代码。

public partial class mydataEntities
    {
        public mydataEntities(string connectionString) : base(connectionString) { }
    }

我仍然对解决方案感到困惑，但似乎使用此代码连接试图使用 Mssql 数据提供程序而不是 MySql

关于不支持 MySQL 关键字 : 'port' error in C# application，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/32686610/