Question

我的网站正在离线工作，但是在线它给了我以下错误。我们已经解决了SQL，因为它可能是DB问题，有一个类的引用，这个类是要访问数据库。这是一个练习：https://code.msdn.microsoft.com/Getting-Started-with-221c01f5#content

系统找不到指定的文件描述：执行当前Web请求期间发生未处理的异常。请查看堆栈跟踪以获取有关错误及其源自代码的位置的更多信息。异常详细信息：System.ComponentModel.Win32Exception：系统找不到指定的文件来源错误：在执行当前Web请求期间生成了未处理的异常。可以使用下面的异常堆栈跟踪来识别有关异常的起源和位置的信息。堆栈跟踪： [Win32Exception（0x80004005）：系统找不到指定的文件] [SqlException（0x80131904）：建立与SQL Server的连接时发生与网络相关或特定于实例的错误。服务器未找到或无法访问。验证实例名称是否正确，以及SQL Server是否配置为允许远程连接。（提供程序：SQL网络接口，错误：52 - 无法找到本地数据库运行时安装。验证是否已正确安装SQL Server Express并且已启用本地数据库运行时功能。）] **

System.Data.SqlClient.SqlInternalConnectionTds..ctor（DbConnectionPoolIdentity   identity，SqlConnectionString connectionOptions，SqlCredential   凭证，Object providerInfo，String newPassword，SecureString   newSecurePassword，Boolean redirectedUserInstance，SqlConnectionString   userConnectionOptions，SessionData reconnectSessionData，   DbConnectionPool池，String accessToken，Boolean   applyTransientFaultHandling）+821
  System.Data.SqlClient.SqlConnectionFactory.CreateConnection（DbConnectionOptions   options，DbConnectionPoolKey poolKey，Object poolGroupProviderInfo，   DbConnectionPool池，DbConnection owningConnection，   DbConnectionOptions userOptions）+332
  System.Data.ProviderBase.DbConnectionFactory.CreatePooledConnection（类DBConnectionPool   pool，DbConnection owningObject，DbConnectionOptions选项，   DbConnectionPoolKey poolKey，DbConnectionOptions userOptions）+38
  System.Data.ProviderBase.DbConnectionPool.CreateObject（的DbConnection   owningObject，DbConnectionOptions userOptions，DbConnectionInternal   oldConnection）+699
  System.Data.ProviderBase.DbConnectionPool.UserCreateRequest（的DbConnection   owningObject，DbConnectionOptions userOptions，DbConnectionInternal   oldConnection）+89
  System.Data.ProviderBase.DbConnectionPool.TryGetConnection（的DbConnection   owningObject，UInt32 waitForMultipleObjectsTimeout，Boolean   allowCreate，Boolean onlyOneCheckConnection，DbConnectionOptions   userOptions，DbConnectionInternal＆amp;连接）+426
  System.Data.ProviderBase.DbConnectionPool.TryGetConnection（的DbConnection   owningObject，TaskCompletionSource 1 retry, DbConnectionOptions userOptions, DbConnectionInternal& connection) +78 System.Data.ProviderBase.DbConnectionFactory.TryGetConnection(DbConnection owningConnection, TaskCompletionSource 1重试，DbConnectionOptions   userOptions，DbConnectionInternal oldConnection，DbConnectionInternal＆amp;   连接）+191
  System.Data.ProviderBase.DbConnectionInternal.TryOpenConnectionInternal（的DbConnection   outerConnection，DbConnectionFactory connectionFactory，   TaskCompletionSource 1 retry, DbConnectionOptions userOptions) +154 System.Data.ProviderBase.DbConnectionClosed.TryOpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory, TaskCompletionSource 1重试，DbConnectionOptions userOptions）+21
  System.Data.SqlClient.SqlConnection.TryOpenInner（TaskCompletionSource 1 retry) +90 System.Data.SqlClient.SqlConnection.TryOpen(TaskCompletionSource 1   重试）+217 System.Data.SqlClient.SqlConnection.Open（）+96
  System.Data.Entity.Infrastructure.Interception.DbConnectionDispatcher.b__36（的DbConnection   t，DbConnectionInterceptionContext c）+10
  System.Data.Entity.Infrastructure.Interception.InternalDispatcher 1.Dispatch(TTarget target, Action 2操作，TInterceptionContext interceptionContext，   行动3 executing, Action 3已执行）+72
  System.Data.Entity.Infrastructure.Interception.DbConnectionDispatcher.Open（的DbConnection   connection，DbInterceptionContext interceptionContext）+360
  System.Data.Entity.SqlServer＆LT;＆GT; c__DisplayClass33.b__32（）   +426 System.Data.Entity.SqlServer。＆lt;＆gt; c__DisplayClass1.b__0（）+10
  System.Data.Entity.SqlServer.DefaultSqlExecutionStrategy.Execute（Func 1 operation) +189 System.Data.Entity.SqlServer.DefaultSqlExecutionStrategy.Execute(Action operation) +78 System.Data.Entity.SqlServer.SqlProviderServices.UsingConnection(DbConnection sqlConnection, Action 1 act）+177
  System.Data.Entity.SqlServer.SqlProviderServices.UsingMasterConnection（的DbConnection   sqlConnection，Action 1 act) +556 System.Data.Entity.SqlServer.SqlProviderServices.CreateDatabaseFromScript(Nullable 1   commandTimeout，DbConnection sqlConnection，String   createDatabaseScript）+86
  System.Data.Entity.SqlServer.SqlProviderServices.DbCreateDatabase（的DbConnection   connection，Nullable 1 commandTimeout, StoreItemCollection storeItemCollection) +164 System.Data.Entity.Core.Common.DbProviderServices.CreateDatabase(DbConnection connection, Nullable 1 commandTimeout，StoreItemCollection   storeItemCollection）+76
  System.Data.Entity.Core.Objects.ObjectContext.CreateDatabase（）+134
  System.Data.Entity.Migrations.Utilities.DatabaseCreator.Create（的DbConnection   连接）+119
  System.Data.Entity.Migrations.DbMigrator.EnsureDatabaseExists（动作   mustSucceedToKeepDatabase）+142
  System.Data.Entity.Migrations.DbMigrator.Update（字符串   targetMigration）+78
  System.Data.Entity.Internal.DatabaseCreator.CreateDatabase（InternalContext   internalContext，Func 3 createMigrator, ObjectContext objectContext) +89 System.Data.Entity.Internal.InternalContext.CreateDatabase(ObjectContext objectContext, DatabaseExistenceState existenceState) +116 System.Data.Entity.Database.Create(DatabaseExistenceState existenceState) +218 System.Data.Entity.CreateDatabaseIfNotExists 1.InitializeDatabase（TContext   上下文）+151
  System.Data.Entity.Internal。＆lt;＆gt; c__DisplayClassf 1.<CreateInitializationAction>b__e() +76 System.Data.Entity.Internal.InternalContext.PerformInitializationAction(Action action) +60 System.Data.Entity.Internal.InternalContext.PerformDatabaseInitialization() +357 System.Data.Entity.Internal.LazyInternalContext.<InitializeDatabase>b__4(InternalContext c) +7 System.Data.Entity.Internal.RetryAction 1.PerformAction（TInput input）   +110 System.Data.Entity.Internal.LazyInternalContext.InitializeDatabaseAction（Action 1 action) +198 System.Data.Entity.Internal.LazyInternalContext.InitializeDatabase() +73 System.Data.Entity.Internal.InternalContext.GetEntitySetAndBaseTypeForType(Type entityType) +28 System.Data.Entity.Internal.Linq.InternalSet 1.Initialize（）+53
  System.Data.Entity.Internal.Linq.InternalSet 1.GetEnumerator() +15 System.Data.Entity.Infrastructure.DbQuery 1.System.Collections.IEnumerable.GetEnumerator（）   +52 System.Web.UI.WebControls.ListViewPagedDataSource.GetEnumerator（）+291   System.Web.UI.WebControls.ListView.CreateItemsWithoutGroups（ListViewPagedDataSource   dataSource，Boolean dataBinding，InsertItemPosition insertPosition，   ArrayList keyArray）+209
  System.Web.UI.WebControls.ListView.CreateChildControls（IEnumerable的   dataSource，Boolean dataBinding）+1032
  System.Web.UI.WebControls.ListView.PerformDataBinding（IEnumerable的   数据）+35
  System.Web.UI.WebControls.DataBoundControl.OnDataSourceViewSelectCallback（IEnumerable的   数据）+128
  System.Web.UI.DataSourceView.Select（DataSourceSelectArguments   参数，DataSourceViewSelectCallback回调）+34
  System.Web.UI.WebControls.ModelDataSourceView.Select（DataSourceSelectArguments   参数，DataSourceViewSelectCallback回调）+80
  System.Web.UI.WebControls.DataBoundControl.PerformSelect（）+ 143 3   System.Web.UI.WebControls.ListView.PerformSelect（）+ 0102   System.Web.UI.WebControls.BaseDataBoundControl.DataBind（）+74
  System.Web.UI.WebControls.BaseDataBoundControl.EnsureDataBound（）+ 114   System.Web.UI.WebControls.ListView.CreateChildControls（）+52
  System.Web.UI.Control.EnsureChildControls（）+92
  System.Web.UI.Control.PreRenderRecursiveInternal（）+42
  System.Web.UI.Control.PreRenderRecursiveInternal（）+160
  System.Web.UI.Control.PreRenderRecursiveInternal（）+160
  System.Web.UI.Control.PreRenderRecursiveInternal（）+160
  System.Web.UI.Page.ProcessRequestMain（布尔   includeStagesBeforeAsyncPoint，Boolean includeStagesAfterAsyncPoint）   883

**

这是代码可能存在的问题，因为网站正在运行，没有此代码。

            <asp:ListView ID="categoryList"  
            ItemType="MyToysHome.Models.Category" 
            runat="server"
            SelectMethod="GetCategories" >
            <ItemTemplate>
                <b style="font-size: large; font-style: normal">

            <a href="~/ProductList.aspx?id=<%#: Item.CategoryID %>">
            <%#: Item.CategoryName %></a>
                </a>
                </b>
            </ItemTemplate>
            <ItemSeparatorTemplate>  |  </ItemSeparatorTemplate>
            </asp:ListView>

系统找不到指定类的文件

0 个答案: