我在下面添加了对静态 ROLES 类的引用，以将角色分配给加入网站的人。当我按下 JOIN ASP.Net 控件上的按钮时，我测试了代码和应用程序挂起。当然，我立即尝试调试以找到问题，但我无法再访问 SQL Express ASPNETDB.mdf - 错误如下所列。提前致谢。
**The code-behind in the Join.aspx file:**
public partial class Join : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
MembershipUser loggedIn = Membership.GetUser();
if (loggedIn == null)
{
return;
}
else
{
Session["userName"] = loggedIn.UserName;
Roles.AddUserToRole(loggedIn.ToString(), "MEMBER");
}
}
}
错误消息：无法打开用户默认数据库。登录失败。用户 'SFP\Susan' 登录失败。
网络配置：
<?xml version="1.0"?>
<!--
For more information on how to configure your ASP.NET application, please visit
http://go.microsoft.com/fwlink/?LinkId=169433
-->
<configuration>
<appSettings>
<add key="ChartImageHandler" value="storage=file;timeout=20;dir=c:\TempImageFiles\;" />
</appSettings>
<system.webServer>
<handlers>
<remove name="ChartImageHandler" />
<add name="ChartImageHandler" preCondition="integratedMode" verb="GET,HEAD,POST"
path="ChartImg.axd" type="System.Web.UI.DataVisualization.Charting.ChartHttpHandler, System.Web.DataVisualization, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" />
</handlers>
</system.webServer>
<system.web>
<authorization>
<allow roles="ADMIN" />
<allow roles="MEMBER" />
<allow roles="GUEST" />
<allow roles="RESTAURANT" />
</authorization>
<roleManager enabled="true" />
<authentication mode="Forms" />
<httpHandlers>
<add path="ChartImg.axd" verb="GET,HEAD,POST" type="System.Web.UI.DataVisualization.Charting.ChartHttpHandler, System.Web.DataVisualization, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"
validate="false" />
</httpHandlers>
<pages>
<controls>
<add tagPrefix="asp" namespace="System.Web.UI.DataVisualization.Charting"
assembly="System.Web.DataVisualization, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" />
</controls>
</pages>
<compilation debug="true" targetFramework="4.0" />
</system.web>
<connectionStrings>
<add name="FCGuideEntities" connectionString="metadata=res://*/FCGuide.csdl|res://*/FCGuide.ssdl|res://*/FCGuide.msl;provider=System.Data.SqlClient;provider connection string="data source=.;attachdbfilename=|DataDirectory|\FCGuide.mdf;integrated security=True;user instance=True;multipleactiveresultsets=True;App=EntityFramework"" providerName="System.Data.EntityClient" />
</connectionStrings>
</configuration>
堆栈跟踪
无法打开用户默认数据库。登录失败。用户 'SFP\Susan' 登录失败。说明：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.Data.SqlClient.SqlException：无法打开用户默认数据库。登录失败。用户 'SFP\Susan' 登录失败。
源错误：
第 48 行：restCity4.Text = featuresList4[0].CITY.CITY_NAME; 第 49 行：第 50 行：MembershipUser loggedIn = Membership.GetUser(); 第 51 行：如果 (loggedIn == null) 第 52 行：{
源文件：H:\FCGuide\FCGuide\default.aspx.cs 行：50
堆栈跟踪：
[SqlException (0x80131904): 无法打开用户默认数据库。登录失败。用户 'SFP\Susan' 登录失败。] System.Data.SqlClient.SqlInternalConnection.OnError（SqlException 异常，布尔 breakConnection）+5064474 System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning() +234 System.Data.SqlClient.TdsParser。 Run(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj) +2275 System.Data.SqlClient.SqlInternalConnectionTds.CompleteLogin(Boolean enlistOK) +35 System.Data.SqlClient.SqlInternalConnectionTds.AttemptOneLogin(ServerInfo serverInfo, String newPassword, Boolean ignoreSniOpenTimeout, TimeoutTimer timeout, SqlConnection owningObject) +183 System.Data.SqlClient.SqlInternalConnectionTds.LoginNoFailover(ServerInfo serverInfo,