Question

我正在部署一个通过ADO.NET实体数据模型使用mysql数据库的silverlight应用程序。

尝试从我的主机运行应用程序时，WCF服务正常，但是从wcf服务调用时出现服务器异常：

无法找到请求的.Net Framework数据提供程序。它可能没有安装。 at System.Data.Common.DbProviderFactories.GetFactory（String providerInvariantName）
在System.Data.EntityClient.EntityConnection.GetFactory（String providerString）。

我在web.config中的代码定义如下

  <connectionStrings>
<add name="modelEntities"  
providerName="System.Data.EntityClient"
connectionString="metadata=res://*;provider=MySql.Data.MySqlClient;provider connection string=&quot;server=localhost;User Id=userid;password=mypass;database=mydb;&quot;"/>
 </connectionStrings>

在我的本地项目上工作正常，因为我已经安装了.NET Connector for mysql等。主机支持.net 3.5 linq和mysql。我需要做些什么来解决这个问题？

我尝试过添加

<system.data>
<DbProviderFactories>
<add name="MySQL Data Provider" invariant="MySql.Data.MySqlClient" description=".Net Framework Data Provider for MySQL" type="MySql.Data.MySqlClient.MySqlClientFactory, MySql.Data, Version=6.2.0.0, Culture=neutral, PublicKeyToken=c5687fc88969c44d" />
</DbProviderFactories>
</system.data>

bin文件夹中的

和MySql.Data.dll以及MySql.Data.Entity.dll，现在我收到错误：

Schema specified is not valid. Errors:     
MySql.Data.Entity.Properties.SchemaDefinition-5.1.ssdl(4,9) : error 0169: All SSDL artifacts must target the same provider. The ProviderManifestToken '5' is different from '5.1' that was encountered earlier.    
MySql.Data.Entity.Properties.SchemaDefinition-5.0.ssdl(4,9) : error 0169: All SSDL artifacts must target the same provider. The ProviderManifestToken '5' is different from '5.1' that was encountered earlier.    
MySql.Data.Entity.Properties.SchemaDefinition-5.0.ssdl(7,4) : error 0019: The EntityContainer name must be unique. An EntityContainer with the name 'Schema' is already defined.    
MySql.Data.Entity.Properties.SchemaDefinition-5.0.ssdl(336,4) : error 0019: Each type name in a schema must be unique. Type name 'MySqlClient.Table' was already defined.    
MySql.Data.Entity.Properties.SchemaDefinition-5.0.ssdl(348,4) : error 0019: Each type name in a schema must be unique. Type name 'MySqlClient.TableColumn' was already defined.    
MySql.Data.Entity.Properties.SchemaDefinition-5.0.ssdl(374,4) : error 0019: Each type name in a schema must be unique. Type name 'MySqlClient.View' was already defined.    
MySql.Data.Entity.Properties.SchemaDefinition-5.0.ssdl(386,4) : error 0019: Each type name in a schema must be unique. Type name 'MySqlClient.ViewColumn' was already defined.    
MySql.Data.Entity.Properties.SchemaDefinition-5.0.ssdl(412,4) : error 0019: Each type name in a schema must be unique. Type name 'MySqlClient.Function' was already defined.    
MySql.Data.Entity.Properties.SchemaDefinition-5.0.ssdl(437,4) : error 0019: Each type name in a schema must be unique. Type name 'MySqlClient.Procedure' was already defined.    
MySql.Data.Entity.Properties.SchemaDefinition-5.0.ssdl(447,4) : error 0019: Each type name in a schema must be unique. Type name 'MySqlClient.Parameter' was already defined.    
MySql.Data.Entity.Properties.SchemaDefinition-5.0.ssdl(471,4) : error 0019: Each type name in a schema must be unique. Type name 'MySqlClient.Constraint' was already defined.    
MySql.Data.Entity.Properties.SchemaDefinition-5.0.ssdl(483,4) : error 0019: Each type name in a schema must be unique. Type name 'MySqlClient.CheckConstraint' was already defined.    
MySql.Data.Entity.Properties.SchemaDefinition-5.0.ssdl(491,4) : error 0019: Each type name in a schema must be unique. Type name 'MySqlClient.ConstraintColumn' was already defined.    
MySql.Data.Entity.Properties.SchemaDefinition-5.0.ssdl(500,4) : error 0019: Each type name in a schema must be unique. Type name 'MySqlClient.ForeignKeyConstraint' was already defined.    
MySql.Data.Entity.Properties.SchemaDefinition-5.0.ssdl(509,4) : error 0019: Each type name in a schema must be unique. Type name 'MySqlClient.ForeignKey' was already defined.    
MySql.Data.Entity.Properties.SchemaDefinition-5.0.ssdl(520,4) : error 0019: Each type name in a schema must be unique. Type name 'MySqlClient.ViewConstraint' was already defined.    
MySql.Data.Entity.Properties.SchemaDefinition-5.0.ssdl(535,4) : error 0019: Each type name in a schema must be unique. Type name 'MySqlClient.TableTableConstraint' was already defined.    
MySql.Data.Entity.Properties.SchemaDefinition-5.0.ssdl(548,4) : error 0019: Each type name in a schema must be unique. Type name 'MySqlClient.ConstraintConstraintColumn' was already defined.    
MySql.Data.Entity.Properties.SchemaDefinition-5.0.ssdl(561,4) : error 0019: Each type name in a schema must be unique. Type name 'MySqlClient.ConstraintForeignKey' was already defined.    
MySql.Data.Entity.Properties.SchemaDefinition-5.0.ssdl(574,4) : error 0019: Each type name in a schema must be unique. Type name 'MySqlClient.FromForeignKeyColumn' was already defined.    
MySql.Data.Entity.Properties.SchemaDefinition-5.0.ssdl(587,4) : error 0019: Each type name in a schema must be unique. Type name 'MySqlClient.ToForeignKeyColumn' was already defined.    
MySql.Data.Entity.Properties.SchemaDefinition-5.0.ssdl(600,4) : error 0019: Each type name in a schema must be unique. Type name 'MySqlClient.TableTableColumn' was already defined.    
MySql.Data.Entity.Properties.SchemaDefinition-5.0.ssdl(613,4) : error 0019: Each type name in a schema must be unique. Type name 'MySqlClient.ViewViewColumn' was already defined.    
MySql.Data.Entity.Properties.SchemaDefinition-5.0.ssdl(626,4) : error 0019: Each type name in a schema must be unique. Type name 'MySqlClient.FunctionFunctionParameter' was already defined.    
MySql.Data.Entity.Properties.SchemaDefinition-5.0.ssdl(639,4) : error 0019: Each type name in a schema must be unique. Type name 'MySqlClient.ProcedureProcedureParameter' was already defined.    
MySql.Data.Entity.Properties.SchemaDefinition-5.0.ssdl(652,4) : error 0019: Each type name in a schema must be unique. Type name 'MySqlClient.ViewViewConstraint' was already defined.    
MySql.Data.Entity.Properties.SchemaDefinition-5.0.ssdl(665,4) : error 0019: Each type name in a schema must be unique. Type name 'MySqlClient.ViewConstraintConstraintColumn' was already defined.    
MySql.Data.Entity.Properties.SchemaDefinition-5.0.ssdl(678,4) : error 0019: Each type name in a schema must be unique. Type name 'MySqlClient.ViewConstraintForeignKey' was already defined.    
MySql.Data.Entity.Properties.SchemaDefinition-5.0.ssdl(691,4) : error 0019: Each type name in a schema must be unique. Type name 'MySqlClient.FromForeignKeyViewColumn' was already defined.    
MySql.Data.Entity.Properties.SchemaDefinition-5.0.ssdl(704,4) : error 0019: Each type name in a schema must be unique. Type name 'MySqlClient.ToForeignKeyViewColumn' was already defined.    
MySql.Data.Entity.Properties.SchemaDefinition-6.0.ssdl(4,9) : error 0169: All SSDL artifacts must target the same provider. The ProviderManifestToken '5' is different from '5.1' that was encountered earlier.

这是什么？为什么部署这么难？

Answer 1

我会尝试添加对MySql.Data的显式引用，然后在您的主机帐户上确保您的bin文件夹中包含MySql.Data.dll的副本。

Answer 2

据我记得。您不能在同一项目中使用不同的数据库使用两个实体模型。看起来你也有一个sql server或其他db实体模型或某些引用sql server的东西是不干净的。

只使用一个只有mysql的实体模型。

Answer 3

您是否首先将Entity框架指向某个db，然后转移到mysql？

似乎有人有类似的问题

click here to see the error & solution that worked for him

缺少Silverlight部署数据提供程序

3 个答案: