無法訪問ASP.NET配置工具

Question

當我想訪問ASP.NET配置工具時，它會顯示以下錯誤消息：

There is a problem with your selected data store. This can be caused by an invalid server name or credentials, or by insufficient permission. It can also be caused by the role manager feature not being enabled. Click the button below to be redirected to a page where you can choose a new data store. 

The following message may help in diagnosing the problem: Unable to connect to SQL Server database.

我能做什么。 在訪問之前，是否應該設置任何配置？

我正在使用帶有內置連接字符串的ASP.Net MVC4項目。

<add name="DefaultConnection" connectionString="Data Source=(LocalDb)\v11.0;Initial Catalog=aspnet-AccountPortal-20131128183241;Integrated Security=SSPI;AttachDBFilename=|DataDirectory|\aspnet-AccountPortal-20131128183241.mdf" providerName="System.Data.SqlClient" />

Answer 1

您應先從web.config文件訪問connection string ，然后再繼續操作。

web.config文件 ：

<connectionStrings>
  <add name="DefaultConnection" connectionString="Data Source=(LocalDb)\v11.0;Initial Catalog=aspnet-AccountPortal-20131128183241;Integrated Security=SSPI;AttachDBFilename=|DataDirectory|\aspnet-AccountPortal-20131128183241.mdf" providerName="System.Data.SqlClient" />
</connectionStrings>

來自代碼 ：訪問連接字符串，位於web.config文件中

string connectionstring = System.Configuration.ConfigurationManager.ConnectionStrings["DefaultConnection"].ConnectionString;