C# '中的服务器错误/'；应用提供程序未返回ProviderManifestToken字符串。

我已经查找了一段时间，但在这部分代码中仍然出现相同的错误：

public ViewResult List(string category, int page = 1)
    {

        ProductsListViewModel viewModel = new ProductsListViewModel
        {
            Products = repository.Products
                .Where(p => category == null ? true : p.Category == category)
                .OrderBy(p => p.ProductID)
                .Skip((page - 1) * PageSize)
                .Take(PageSize),
            PagingInfo = new PagingInfo
            {
                CurrentPage = page,
                ItemsPerPage = PageSize,
                TotalItems = category == null ?
                    repository.Products.Count() :
                    repository.Products.Where(e => e.Category == category).Count()
            },
            CurrentCategory = category
        };
        return View(viewModel);
    }

我正在附加web配置代码：

<configuration>
<connectionStrings>
<add name="SportsStore" connectionString="Data Source=ASUS-ПК;Initial Catalog=SportsStore;Integrated Security=True;Pooling=False" providerName="System.Data.SqlClient"/>

<connectionStrings>
<add name="SportsStoreEntities" connectionString="metadata=res://*/Concrete.ORM.SportsStore.csdl|res://*/Concrete.ORM.SportsStore.ssdl|res://*/Concrete.ORM.SportsStore.msl;provider=System.Data.SqlClient;provider connection string=&quot;Data Source=ASUS-ПК;Initial Catalog=SportsStore;Integrated Security=True;MultipleActiveResultSets=True&quot;" providerName="System.Data.EntityClient" />

和app.config代码：

<configuration>
<connectionStrings>
<add name="SportsStore" connectionString="Data Source=ASUS-ПК;Initial Catalog=SportsStore;Integrated Security=True;Pooling=False" providerName="System.Data.SqlClient"/>

<connectionStrings>
<add name="SportsStoreEntities" connectionString="metadata=res://*/Concrete.ORM.SportsStore.csdl|res://*/Concrete.ORM.SportsStore.ssdl|res://*/Concrete.ORM.SportsStore.msl;provider=System.Data.SqlClient;provider connection string=&quot;Data Source=ASUS-ПК;Initial Catalog=SportsStore;Integrated Security=True;MultipleActiveResultSets=True&quot;" providerName="System.Data.EntityClient" />

---

请告诉我我做错了什么？

似乎您的一个连接字符串出错了

获取有效连接字符串的最安全方法之一是在VisualStudio中连接到数据库，然后右键单击工作连接，选择“属性”，并将显示的连接字符串值复制到存储库设置为使用的配置文件中