xml 'packages' 元素未声明

The 'packages' element is not declared

提问by Luis Valencia

When using asp.net mvc 3 project with vs 2010 I have lots of warnings like the ones below:

在 vs 2010 中使用 asp.net mvc 3 项目时，我有很多警告，如下所示：

I wonder if I did something wrong and I need to change something, because this is the out of the box project that comes within Visual Studio.

我想知道我是否做错了什么，我需要更改一些东西，因为这是 Visual Studio 中的开箱即用项目。

Warning 1 The 'packages' element is not declared. C:\Users\LUIS.SIMBIOS\Documents\Visual Studio 2010\Projects\SlnHR\HR\packages.config 2 2 HR

Warning 2 Validation (XHTML 1.0 Transitional): Attribute 'charset' is not a valid attribute of element 'meta'. C:\Users\LUIS.SIMBIOS\Documents\Visual Studio 2010\Projects\SlnHR\HR\Views\Shared_Layout.cshtml 4 11 HR

Warning 20 Error 6002: The table/view 'HR.dbo.vw_aspnet_Users' does not have a primary key defined. The key has been inferred and the definition was created as a read-only table/view. C:\Users\LUIS.SIMBIOS\Documents\Visual Studio 2010\Projects\SlnHR\HRRazorForms\Models\HR.edmx 1 1 HRRazorForms

警告 1 未声明“packages”元素。C:\Users\LUIS.SIMBIOS\Documents\Visual Studio 2010\Projects\SlnHR\HR\packages.config 2 2 HR

警告 2 验证（XHTML 1.0 Transitional）：属性“charset”不是元素“meta”的有效属性。C:\Users\LUIS.SIMBIOS\Documents\Visual Studio 2010\Projects\SlnHR\HR\Views\Shared_Layout.cshtml 4 11 HR

警告 20 错误 6002：表/视图“HR.dbo.vw_aspnet_Users”没有定义主键。已推断出键并将定义创建为只读表/视图。C:\Users\LUIS.SIMBIOS\Documents\Visual Studio 2010\Projects\SlnHR\HRRazorForms\Models\HR.edmx 1 1 HRRazorForms

web.config

网页配置

<?xml version="1.0"?>
<!--
  For more information on how to configure your ASP.NET application, please visit
  http://go.microsoft.com/fwlink/?LinkId=152368
  -->

<configuration>
  <connectionStrings>
    <add name="ApplicationServices" connectionString="data source=xx; User Id=development; Password=xxxxx; Initial Catalog=HR" providerName="System.Data.SqlClient" />
  <add name="HREntities" connectionString="metadata=res://*/Models.HR.csdl|res://*/Models.HR.ssdl|res://*/Models.HR.msl;provider=System.Data.SqlClient;provider connection string=&quot;Data Source=xxxx;Initial Catalog=HR;User ID=development;Password=xxxx;MultipleActiveResultSets=True&quot;" providerName="System.Data.EntityClient" /></connectionStrings>

  <appSettings>
    <add key="webpages:Version" value="1.0.0.0" />
    <add key="ClientValidationEnabled" value="true" />
    <add key="UnobtrusiveJavaScriptEnabled" value="true" />
  </appSettings>

  <system.web>
    <compilation debug="true" targetFramework="4.0">
      <assemblies>
        <add assembly="System.Web.Abstractions, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />
        <add assembly="System.Web.Helpers, Version=1.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />
        <add assembly="System.Web.Routing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />
        <add assembly="System.Web.Mvc, Version=3.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />
        <add assembly="System.Web.WebPages, Version=1.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />
      <add assembly="System.Data.Entity, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" /></assemblies>
    </compilation>

    <authentication mode="Forms">
      <forms loginUrl="~/Account/LogOn" timeout="2880" />
    </authentication>

    <membership>
      <providers>
        <clear />
        <add name="AspNetSqlMembershipProvider" type="System.Web.Security.SqlMembershipProvider" connectionStringName="ApplicationServices" enablePasswordRetrieval="false" enablePasswordReset="true" requiresQuestionAndAnswer="false" requiresUniqueEmail="false" maxInvalidPasswordAttempts="5" minRequiredPasswordLength="6" minRequiredNonalphanumericCharacters="0" passwordAttemptWindow="10" applicationName="/" />
      </providers>
    </membership>

    <profile>
      <providers>
        <clear />
        <add name="AspNetSqlProfileProvider" type="System.Web.Profile.SqlProfileProvider" connectionStringName="ApplicationServices" applicationName="/" />
      </providers>
    </profile>

    <roleManager enabled="false">
      <providers>
        <clear />
        <add name="AspNetSqlRoleProvider" type="System.Web.Security.SqlRoleProvider" connectionStringName="ApplicationServices" applicationName="/" />
        <add name="AspNetWindowsTokenRoleProvider" type="System.Web.Security.WindowsTokenRoleProvider" applicationName="/" />
      </providers>
    </roleManager>

    <pages>
      <namespaces>
        <add namespace="System.Web.Helpers" />
        <add namespace="System.Web.Mvc" />
        <add namespace="System.Web.Mvc.Ajax" />
        <add namespace="System.Web.Mvc.Html" />
        <add namespace="System.Web.Routing" />
        <add namespace="System.Web.WebPages" />
      </namespaces>
    </pages>
  </system.web>

  <system.webServer>
    <validation validateIntegratedModeConfiguration="false" />
    <modules runAllManagedModulesForAllRequests="true" />
  </system.webServer>

  <runtime>
    <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
      <dependentAssembly>
        <assemblyIdentity name="System.Web.Mvc" publicKeyToken="31bf3856ad364e35" />
        <bindingRedirect oldVersion="1.0.0.0-2.0.0.0" newVersion="3.0.0.0" />
      </dependentAssembly>
    </assemblyBinding>
  </runtime>
</configuration>

packages.config

包.config

<?xml version="1.0" encoding="utf-8"?>
<packages>
  <package id="EntityFramework" version="4.1.10331.0" />
  <package id="jQuery" version="1.5.1" />
  <package id="jQuery.UI.Combined" version="1.8.11" />
  <package id="jQuery.Validation" version="1.8.0" />
  <package id="jQuery.vsdoc" version="1.5.1" />
  <package id="Modernizr" version="1.7" />
</packages>

回答by Joel

Taken from this answer.

取自这个答案。

1. Close your packages.configfile.
2. Build
3. Warning is gone!

1. 关闭您的packages.config文件。
2. 建造
3. 警告消失了！

This is the first time I see ignoring a problem actually makes it go away...

这是我第一次看到忽略一个问题实际上会让它消失......

Edit in 2020: if you are viewing this warning, consider upgrading to PackageReferenceif you can

2020 年编辑：如果您正在查看此警告，请考虑升级到PackageReference（如果可以）

回答by Dark Matter

Use <packages xmlns="urn:packages">in the place of <packages>

使用<packages xmlns="urn:packages">中的位置<packages>

回答by Carsten

Oh ok - now I get it. You can ignore this one - the XML for this is just not correct - the packages-element is indeed not declared (there is no reference to a schema or whatever). I think this is a known minor bug that won't do a thing because only NuGet will use this.

哦，好的 - 现在我明白了。您可以忽略这个 - 用于此的 XML 是不正确的 - 包元素确实没有声明（没有对架构的引用或其他任何内容）。我认为这是一个已知的小错误，它不会做任何事情，因为只有 NuGet 会使用它。

See this similar questionalso.

另请参阅此类似问题。

回答by Tom English

Change the node to and create a file, packages.xsd, in the same folder (and include it in the project) with the following contents:

将节点更改为并在同一文件夹（并将其包含在项目中）中创建一个文件 packages.xsd，其内容如下：

<?xml version="1.0" encoding="utf-8" ?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" elementFormDefault="qualified"
      targetNamespace="urn:packages" xmlns="urn:packages">
  <xs:element name="packages">
    <xs:complexType>
      <xs:sequence>
        <xs:element name="package" maxOccurs="unbounded">
          <xs:complexType>
            <xs:attribute name="id" type="xs:string" use="required" />
            <xs:attribute name="version" type="xs:string" use="required" />
            <xs:attribute name="targetFramework" type="xs:string" use="optional" />
            <xs:attribute name="allowedVersions" type="xs:string" use="optional" />
          </xs:complexType>
        </xs:element>
      </xs:sequence>
    </xs:complexType>
  </xs:element>
</xs:schema>

回答by garryp

You can also find a copy of the nuspec.xsd here as it seems to no longer be available:

您还可以在此处找到 nuspec.xsd 的副本，因为它似乎不再可用：

https://gist.github.com/sharwell/6131243

https://gist.github.com/sharwell/6131243