Question

我是新手。我正在使用SimpleMembership生成注册表和登录表。但是，我得到以下例外。

异常

发生了'System.ArgumentException'类型的异常   System.Data.dll但未在用户代码中处理

其他信息：无法找到所请求的.Net Framework   数据提供者。它可能没有安装。

CODE

    [AllowAnonymous]
    [HttpGet]
    public ActionResult Register1()
    {
        if (!WebSecurity.Initialized)
        {


            //WebSecurity.InitializeDatabaseConnection("My_Entities", "Users", "Id", "UserName", autoCreateTables: true);
            WebSecurity.InitializeDatabaseConnection("My_Entities", "User", "Id", "Email", autoCreateTables: true);
        }
        return View("Register");
    }
    [AllowAnonymous]
    [HttpPost]
    public ActionResult Register1(FormCollection form)
    {
        WebSecurity.CreateUserAndAccount(form["username"], form["password"], new { DisplayName = form["displayname"], Country = form["country"] });
        Response.Redirect("~/account/login");
        return View();
    }

WEB.CONFIG

<?xml version="1.0" encoding="utf-8"?>
<!--
  For more information on how to configure your ASP.NET application, please visit
  http://go.microsoft.com/fwlink/?LinkId=169433
  -->
<configuration>
  <configSections>
    <!-- For more information on Entity Framework configuration, visit http://go.microsoft.com/fwlink/?LinkID=237468 -->
    <!-- For more information on Entity Framework configuration, visit http://go.microsoft.com/fwlink/?LinkID=237468 -->
    <section name="entityFramework" type="System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection, EntityFramework, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" />
  </configSections>
  <appSettings>
    <add key="webpages:Version" value="3.0.0.0" />
    <add key="webpages:Enabled" value="false" />
    <add key="PreserveLoginUrl" value="true" />
    <add key="ClientValidationEnabled" value="true" />
    <add key="UnobtrusiveJavaScriptEnabled" value="true" />
  </appSettings>

  <system.web>
    <compilation debug="true" targetFramework="4.5" />
    <httpRuntime targetFramework="4.5" />
    <authentication mode="Forms">
      <forms loginUrl="~/Account/Login" timeout="2880" />
    </authentication>
    <membership defaultProvider="p1">
      <providers>
        <add name="p1" type="WebMatrix.WebData.SimpleMembershipProvider, WebMatrix.WebData" />
      </providers>
    </membership>
    <roleManager enabled="true">
      <providers>
        <add name="p1" type="WebMatrix.WebData.SimpleRoleProvider, WebMatrix.WebData" />
      </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" />
    <handlers>
      <remove name="ExtensionlessUrlHandler-Integrated-4.0" />
      <remove name="OPTIONSVerbHandler" />
      <remove name="TRACEVerbHandler" />
      <add name="ExtensionlessUrlHandler-Integrated-4.0" path="*." verb="*" type="System.Web.Handlers.TransferRequestHandler" preCondition="integratedMode,runtimeVersionv4.0" />
    </handlers>
  </system.webServer>
  <runtime>
    <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
      <dependentAssembly>
        <assemblyIdentity name="System.Web.Helpers" publicKeyToken="31bf3856ad364e35" />
        <bindingRedirect oldVersion="1.0.0.0-3.0.0.0" newVersion="3.0.0.0" />
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="System.Web.WebPages" publicKeyToken="31bf3856ad364e35" />
        <bindingRedirect oldVersion="1.0.0.0-3.0.0.0" newVersion="3.0.0.0" />
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="System.Web.Mvc" publicKeyToken="31bf3856ad364e35" />
        <bindingRedirect oldVersion="1.0.0.0-5.2.3.0" newVersion="5.2.3.0" />
      </dependentAssembly>
    </assemblyBinding>
  </runtime>
  <connectionStrings>
    <add name="MY_Entities" connectionString="metadata=res://*/Models.DB.csdl|res://*/Models.DB.ssdl|res://*/Models.DB.msl;provider=System.Data.SqlClient;provider connection string=&quot;data source=MYCOMP\MYCOM;initial catalog=MY;persist security info=True;user id=sa;password=1*34;MultipleActiveResultSets=True;App=EntityFramework&quot;" providerName="System.Data.EntityClient" />

  </connectionStrings>
  <entityFramework>
    <defaultConnectionFactory type="System.Data.Entity.Infrastructure.SqlCeConnectionFactory, EntityFramework">
      <parameters>
        <parameter value="System.Data.SqlServerCe.4.0" />
      </parameters>
    </defaultConnectionFactory>
    <providers>
      <provider invariantName="System.Data.SqlServerCe.4.0" type="System.Data.Entity.SqlServerCompact.SqlCeProviderServices, EntityFramework.SqlServerCompact" />
    </providers>
  </entityFramework>
</configuration>

Answer 1

请尝试在web.config中添加以下配置设置。

<system.data>
<DbProviderFactories>
    <remove invariant="System.Data.SqlServerCe.4.0" />
    <add name="Microsoft SQL Server Compact Data Provider 4.0" invariant="System.Data.SqlServerCe.4.0" description=".NET Framework Data Provider for Microsoft SQL Server Compact" type="System.Data.SqlServerCe.SqlCeProviderFactory, System.Data.SqlServerCe, Version=4.0.0.1, Culture=neutral, PublicKeyToken=89845dcd8080cc91" />
</DbProviderFactories>

Answer 2

提供的SESSION_DRIVER=file文件在此部分中提供了web.config作为实体框架的数据提供者：

System.Data.SqlServerCe.4.0

由于错误明确表示尚未安装所请求的数据提供程序，请在<entityFramework> <defaultConnectionFactory type="System.Data.Entity.Infrastructure.SqlCeConnectionFactory, EntityFramework"> <parameters> <parameter value="System.Data.SqlServerCe.4.0" /> </parameters> </defaultConnectionFactory> <providers> <provider invariantName="System.Data.SqlServerCe.4.0" type="System.Data.Entity.SqlServerCompact.SqlCeProviderServices, EntityFramework.SqlServerCompact" /> </providers> </entityFramework>中找到machine.config文件，在管理员权限中对其进行编辑，然后在下面添加以下这些行（或者如果您正在懒得挖掘machine.config，将它们放在%Windows%\Microsoft.NET\Framework\[version number]\Config元素下的web.config中：

system.data

此外，如果找到<system.data> <DbProviderFactories> <remove invariant="System.Data.SqlServerCe.4.0" /> <add name="Microsoft SQL Server Compact Data Provider 4.0" invariant="System.Data.SqlServerCe.4.0" description=".NET Framework Data Provider for Microsoft SQL Server Compact" type="System.Data.SqlServerCe.SqlCeProviderFactory, System.Data.SqlServerCe, Version=4.0.0.0, Culture=neutral, PublicKeyToken=89845dcd8080cc91" /> </DbProviderFactories> </system.data>，请删除<DbProviderFactories />的任何单一终止元素。

接下来，您可以使用程序包管理器控制台添加与SQL Server CE（sqlce*.dll）相关的引用，方法是查找EntityFramework.SqlServerCompact包（请参阅this one）并将其安装在您的解决方案上。此外，在需要时，将EF（和SQL Server）连接字符串中的提供程序名称System.Data.SqlClient更改为System.Data.SqlServerCe.4.0。

参考文献：

Unable to find the requested .Net Framework Data Provider

Unable to find the requested .Net Framework Data Provider. It may not be installed.

Unable to find the requested .Net Framework Data Provider. It may not be installed. - when following mvc3 asp.net tutorial

实现SimpleMembership时无法找到.net数据提供程序异常

2 个答案: