blocks|key|337887|text|在过去遇到这个问题时，我总是创建包含实体模型的第三个共享库-这样你就知道不会有名称冲突，如果你决定向模型添加一个新的表/列/方法，你只需要这样做一次，等等。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|337888|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

When faced with this problem in the past, I've always created a third, shared library that contains the entity model - that way you know there's not going to be a name conflict, if you decide to add a new table/column/method to the model you only need to do so once, etc, etc.

blocks|key|3108257|text|当单个DLL或类库项目中有多个实体model.edmx文件时，会发生此错误。虽然我不知道错误背后的原因，但您可以通过删除另一个模型或将另一个model.edmx文件移动到另一个类库来解决这个问题。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3108258|另外，不要忘记删除前一个dll的引用|3108259|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

This error occurs when you have more than one entity model.edmx files in a single DLL or class library project. Although the reason behind the error is not known to me , you can fix this by deleting the other model or moving the other model.edmx file to another class library . 

Also dont forget to remove the references of the previous dll

blocks|key|3108284|text|嗯，在我的例子中，我使用的是不同的软件架构，因为我有不同的项目(Dll)，它们访问相同的数据库，但我有不同的实体。因此，当我在项目中有需要全部或至少两个引用的引用时，我会收到以下错误|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3108285|如果我更改每个dll上的实体容器名称，问题就解决了，但现在我的连接字符串是不同的，我必须在配置文件中包含我引用的每个dll的所有连接字符串。|3108286|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

Well, in my case I'm working diferent software architecture, because I have diferent projects (dlls), they access to the same Database, but I have diferent entities inside. So, when I have references in a project that needs all or at least two of them, i get this error

If I change the Entity Container Name on each one, I solve the problem, but now my connection string are diferent and I have to include all the connection strings in the config file for each dll I refer.

blocks|key|337931|text|转到bin文件夹并手动删除dll和pdb文件。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|337932|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

Go to that bin folder and delete dll and pdb file manually.

blocks|key|3321332|text|注当尝试将实体容器重命名为先前删除的实体容器时，您需要进入web.config或app.config并从配置节中删除连接字符串。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3321333|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

Note when trying to rename a entity container to that of a previously deleted entity container, you will need to go into your web.config or app.config and delete the connection string out of the configuration section.

blocks|key|3321401|text|以防其他人绝望，找不到任何答案-我意外地在第二个位置得到了项目中包含的.edmx文件的副本。这两个都包含在构建中。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3321402|;-)|3321403|如果这发生在你身上，不要害怕:你不是第一个。|3321404|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|H|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|I|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|J|8|@]|9|@]|A|$]]|$1|F|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|G|$]]

Just in case anyone else is desperate and not finding any answers - I accidentally ended up with a copy of my .edmx file included in the project in a second location. Both were being included in the build.

;-)

If this happened to you, fear not: You were not the first.

blocks|key|3108521|text|从此处更改webconfig文件实体连接字符串条目|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3108522|metadata=res://*/App_Code.AAA.csdl%7Cres://*/App_Code.AAA.ssdl%7Cres://*/App_Code.AAA.msl;provider=System.Data.SqlClient;provider+connection+string=&quot;data+source=XXX;initial+catalog=XXX;user+id=XXX;password=XXX;multipleactiveresultsets=True;App=EntityFramework&quot;"+
providerName="System.Data.EntityClient|code-block|syntax|javascript|3108523|至|3108524|metadata=res://MyProject/App_Code.AAA.csdl%7Cres://MyProject/App_Code.AAA.ssdl%7Cres://MyProject/App_Code.AAA.msl;provider=System.Data.SqlClient;provider+connection+string=&quot;data+source=XXX;initial+catalog=XXX;user+id=XXX;password=XXX;multipleactiveresultsets=True;App=EntityFramework&quot;"+
providerName="System.Data.EntityClient|3108525|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

Change the webconfig file entity connection string entry from this

<pre><code>metadata=res://*/App_Code.AAA.csdl|res://*/App_Code.AAA.ssdl|res://*/App_Code.AAA.msl;provider=System.Data.SqlClient;provider connection string=&amp;quot;data source=XXX;initial catalog=XXX;user id=XXX;password=XXX;multipleactiveresultsets=True;App=EntityFramework&amp;quot;" 
providerName="System.Data.EntityClient
</code></pre>

to

<pre><code>metadata=res://MyProject/App_Code.AAA.csdl|res://MyProject/App_Code.AAA.ssdl|res://MyProject/App_Code.AAA.msl;provider=System.Data.SqlClient;provider connection string=&amp;quot;data source=XXX;initial catalog=XXX;user id=XXX;password=XXX;multipleactiveresultsets=True;App=EntityFramework&amp;quot;" 
providerName="System.Data.EntityClient
</code></pre>

blocks|key|338042|text|我在EntityFramework+6.0中修复了这个问题。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|338043|338044|在创建模型期间，我将.edmx命名为实体的名称。即(MYDbEntities)|ordered-list-item|338045|After创建，我打开MYDbEntities.Context.cs并修改了"Entities“类，以使App.Config生效，并查找连接字符串|338046|。打开MYDbEntities.Context.cs，将配置中的连接字符串更改为connection+string。示例"MyDbConnection"|338047|Make确保连接字符串如下所示|338048|338049|metadata=res:///MYDbEntities.csdl%7Cres:///MYDbEntities.ssdl%7Cres://*/MYDbEntities.msl;provider=System.Data.SqlClient;provider+connection+string="data+source=.;initial+catalog=YourDb;persist+security+info=True;user+connection|338050|注意:+my+entities驻留在单独的DLL中。|338051|希望这能有所帮助。|338052|entityMap^0|0|0|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|V|8|@]|9|@]|A|$]]|$1|C|3|D|5|E|7|W|8|@]|9|@]|A|$]]|$1|F|3|G|5|E|7|X|8|@]|9|@]|A|$]]|$1|H|3|I|5|E|7|Y|8|@]|9|@]|A|$]]|$1|J|3|K|5|E|7|Z|8|@]|9|@]|A|$]]|$1|L|3|-4|5|6|7|10|8|@]|9|@]|A|$]]|$1|M|3|N|5|6|7|11|8|@]|9|@]|A|$]]|$1|O|3|P|5|6|7|12|8|@]|9|@]|A|$]]|$1|Q|3|R|5|6|7|13|8|@]|9|@]|A|$]]|$1|S|3|-4|5|6|7|14|8|@]|9|@]|A|$]]]|T|$]]

I fixed this issue in EntityFramework 6.0 by.

<ol>
<li>During creation of the models, I name the .edmx to the name of the entities. i.e. (MYDbEntities)</li>
<li>After creation i open the MYDbEntities.Context.cs and modified the "Entities" Class to "MYDbEntities".</li>
<li>Open the App.Config and look for the connection string</li>
<li>Open the MYDbEntities.Context.cs and change the connection string to Connection string from the config. example "MyDbConnection"</li>
<li>Make sure that the connection string is like this

metadata=res:///MYDbEntities.csdl|res:///MYDbEntities.ssdl|res://*/MYDbEntities.msl;provider=System.Data.SqlClient;provider connection string=&quot;data source=.;initial catalog=YourDb;persist security info=True;user id=sa;password=Sw0rdf!sh;multipleactiveresultsets=True;application name=EntityFramework&quot;</li>
</ol>

Note: my entities resides in a separate DLL.

Hope this helps.

blocks|key|3321496|text|在我的例子中，所有的解决方案都不起作用。我终于在我的主机上回收了IIS，让它正常工作。希望这对某些人有帮助:)|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3321497|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

In my case none of the solutions worked. I finally recycled the IIS on my hosting to make it work. 
Hope this helps someone :)

blocks|key|339400|text|我的实体在另一个类库(MyLibrary.Data)中。更改以下内容有效：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|339401|<add+name="Entities"+connectionString="metadata=res://*/;&#xA;+++++++++provider=MySql.Data.MySqlClient;+.....

<add+name="Entities"+connectionString="metadata=res://MyLibrary.Data;&#xA;+++++++++provider=MySql.Data.MySqlClient;|code-block|syntax|javascript|339402|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

My Entities were in another class library (MyLibrary.Data). Changing below worked :

<pre><code>&lt;add name="Entities" connectionString="metadata=res://*/;&amp;#xA; provider=MySql.Data.MySqlClient; .....

&lt;add name="Entities" connectionString="metadata=res://MyLibrary.Data;&amp;#xA; provider=MySql.Data.MySqlClient;
</code></pre>

blocks|key|342912|text|在我的例子中，在尝试了这里给出的所有解决方案后，我只需在评论中添加一个连接字符串，然后重新启动VS+2019，然后我就可以修改一个名称了。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|342913|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

In my case, after trying all the solution given here I just put a connection string in comments and restarted VS 2019 and then I was able to modify a name.

We have a solution which consists of two projects - a console application project and a web application project. Each of these has an identical in schema, but differently named .edmx file used to access the same database.

The console application runs as a scheduled task on the same server as the web application is hosted. The web application contains a reference to the console application as certain actions within the web application lead to methods in the console application being called. 
This combination has been running in our staging environment successfully for many months. 

When released live we are seeing the following error message at least once a day:

Schema specified is not valid. Errors:

<blockquote>
 ProjectName.csdl(3,4) : error 0019: The EntityContainer name must be
 unique. An EntityContainer with the name 'ProjectEntities' is already
 defined. ProjectName.csdl(63,4) : error 0019: Each type name in a
 schema must be unique. Type name 'ProjectModel.DataSource' was already
 defined. ProjectName.csdl(75,4) : error 0019: Each type name in a
 schema must be unique. Type name 'ProjectModel.Error' was already
 defined.
</blockquote>

This continues, listing all the type names in our schema.

This error can be fixed by recycling the application pool or restarting IIS. 

Please note that the error does not occur until the web application has been running for a while - it is not occuring when we compile or the first time we access the application.

My initial theory was that the two Entity Containers are conflicting with each other because the web application references the console application, but they have different names, which makes the error "The EntityContainer name must be unique. An EntityContainer with the name 'ProjectEntities' is already defined" confusing.

Entity Framework error - "The EntityContainer name must be unique"

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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