.net 权限问题
第一个问题：
安全性异常 说明: 应用程序试图执行安全策略不允许的操作。要授予此应用程序所需的权限，请与系统管理员联系，或在配置文件中更改该应用程序的信任级别。 异常详细信息: System.Security.SecurityException: 请求“System.Data.SqlClient.SqlClientPermission, System.Data, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089”类型的权限已失败。源错误: 行 30: {行 31: string sql = "select UserName from Tab_GuestBook";行 32: DataTable dt = CSA.DAL.DBAccess.getRS(sql);行 33: foreach (DataRow dr in dt.Rows)行 34: { 源文件: \\bingnian\测试共享\Default.aspx.cs 行: 32 堆栈跟踪: [SecurityException: 请求“System.Data.SqlClient.SqlClientPermission, System.Data, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089”类型的权限已失败。] System.Security.CodeAccessSecurityEngine.Check(Object demand, StackCrawlMark& stackMark, Boolean isPermSet) +0 System.Security.PermissionSet.Demand() +83 System.Data.Common.DbConnectionOptions.DemandPermission() +40 System.Data.SqlClient.SqlConnection.PermissionDemand() +44 System.Data.SqlClient.SqlConnectionFactory.PermissionDemand(DbConnection outerConnection) +20 System.Data.ProviderBase.DbConnectionClosed.OpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory) +117 System.Data.SqlClient.SqlConnection.Open() +122 CSA.DAL.SqlHelper.PrepareCommand(SqlCommand cmd, SqlConnection conn, SqlTransaction trans, CommandType cmdType, String cmdText, SqlParameter[] cmdParms) +92 CSA.DAL.SqlHelper.getRs(String connectionString, String cmdText, CommandType cmdType, SqlParameter[] paras, String tblName, Int32 pageIndex, Int32 pageSize, String sortExpression, Int32& RecordCount) +211 CSA.DAL.SqlHelper.getRs(String cmdText) +79 CSA.DAL.DBAccess.getRS(String cmdText) +75 _Default.GetDataByCSA() in \\bingnian\测试共享\Default.aspx.cs:32 _Default.Page_Load(Object sender, EventArgs e) in \\bingnian\测试共享\Default.aspx.cs:14 System.Web.Util.CalliHelper.EventArgFunctionCaller(IntPtr fp, Object o, Object t, EventArgs e) +14 System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e) +35 System.Web.UI.Control.OnLoad(EventArgs e) +99 System.Web.UI.Control.LoadRecursive() +50 System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +6785 System.Web.UI.Page.ProcessRequest(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +242 System.Web.UI.Page.ProcessRequest() +80 System.Web.UI.Page.ProcessRequestWithNoAssert(HttpContext context) +21 System.Web.UI.Page.ProcessRequest(HttpContext context) +49 ASP.default_aspx.ProcessRequest(HttpContext context) in c:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files\测试共享\700ce6e8\de7cab67\App_Web_30r7luoa.0.cs:0 System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +181 System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +75 “/测试共享”应用程序中的服务器错误。--------------------------------------------无法获取所需的权限。 说明: 执行当前 Web 请求期间，出现未处理的异常。请检查堆栈跟踪信息，以了解有关该错误以及代码中导致错误的出处的详细信息。 异常详细信息: System.Security.Policy.PolicyException: 无法获取所需的权限。源错误: 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信息确定有关异常原因和发生位置的信息。 堆栈跟踪: [PolicyException: 无法获取所需的权限。] System.Security.SecurityManager.ResolvePolicy(Evidence evidence, PermissionSet reqdPset, PermissionSet optPset, PermissionSet denyPset, PermissionSet& denied, Boolean checkExecutionPermission) +7606595 System.Security.SecurityManager.ResolvePolicy(Evidence evidence, PermissionSet reqdPset, PermissionSet optPset, PermissionSet denyPset, PermissionSet& denied, Int32& securitySpecialFlags, Boolean checkExecutionPermission) +57[FileLoadException: 未能加载文件或程序集“System.Data.SQLite, Version=1.0.65.0, Culture=neutral, PublicKeyToken=db937bc2d44ff139”或它的某一个依赖项。未能授予最小权限请求。 (异常来自 HRESULT:0x80131417)] System.Reflection.Assembly._nLoad(AssemblyName fileName, String codeBase, Evidence assemblySecurity, Assembly locationHint, StackCrawlMark& stackMark, Boolean throwOnFileNotFound, Boolean forIntrospection) +0 System.Reflection.Assembly.nLoad(AssemblyName fileName, String codeBase, Evidence assemblySecurity, Assembly locationHint, StackCrawlMark& stackMark, Boolean throwOnFileNotFound, Boolean forIntrospection) +43 System.Reflection.Assembly.InternalLoad(AssemblyName assemblyRef, Evidence assemblySecurity, StackCrawlMark& stackMark, Boolean forIntrospection) +127 System.Reflection.Assembly.InternalLoad(String assemblyString, Evidence assemblySecurity, StackCrawlMark& stackMark, Boolean forIntrospection) +142 System.Reflection.Assembly.Load(String assemblyString) +28 System.Web.Configuration.CompilationSection.LoadAssemblyHelper(String assemblyName, Boolean starDirective) +46[ConfigurationErrorsException: 未能加载文件或程序集“System.Data.SQLite, Version=1.0.65.0, Culture=neutral, PublicKeyToken=db937bc2d44ff139”或它的某一个依赖项。未能授予最小权限请求。 (异常来自 HRESULT:0x80131417)] System.Web.Configuration.CompilationSection.LoadAssemblyHelper(String assemblyName, Boolean starDirective) +613 System.Web.Configuration.CompilationSection.LoadAllAssembliesFromAppDomainBinDirectory() +203 System.Web.Configuration.CompilationSection.LoadAssembly(AssemblyInfo ai) +105 System.Web.Compilation.BuildManager.GetReferencedAssemblies(CompilationSection compConfig) +178 System.Web.Compilation.BuildProvidersCompiler..ctor(VirtualPath configPath, Boolean supportLocalization, String outputAssemblyName) +54 System.Web.Compilation.CodeDirectoryCompiler.GetCodeDirectoryAssembly(VirtualPath virtualDir, CodeDirectoryType dirType, String assemblyName, StringSet excludedSubdirectories, Boolean isDirectoryAllowed) +8826642 System.Web.Compilation.BuildManager.CompileCodeDirectory(VirtualPath virtualDir, CodeDirectoryType dirType, String assemblyName, StringSet excludedSubdirectories) +128 System.Web.Compilation.BuildManager.CompileCodeDirectories() +265 System.Web.Compilation.BuildManager.EnsureTopLevelFilesCompiled() +320[HttpException (0x80004005): 未能加载文件或程序集“System.Data.SQLite, Version=1.0.65.0, Culture=neutral, PublicKeyToken=db937bc2d44ff139”或它的某一个依赖项。未能授予最小权限请求。 (异常来自 HRESULT:0x80131417)] System.Web.Compilation.BuildManager.ReportTopLevelCompilationException() +58 System.Web.Compilation.BuildManager.EnsureTopLevelFilesCompiled() +512 System.Web.Hosting.HostingEnvironment.Initialize(ApplicationManager appManager, IApplicationHost appHost, IConfigMapPathFactory configMapPathFactory, HostingEnvironmentParameters hostingParameters) +729[HttpException (0x80004005): 未能加载文件或程序集“System.Data.SQLite, Version=1.0.65.0, Culture=neutral, PublicKeyToken=db937bc2d44ff139”或它的某一个依赖项。未能授予最小权限请求。 (异常来自 HRESULT:0x80131417)] System.Web.HttpRuntime.FirstRequestInit(HttpContext context) +8907951 System.Web.HttpRuntime.EnsureFirstRequestInit(HttpContext context) +85 System.Web.HttpRuntime.ProcessRequestInternal(HttpWorkerRequest wr) +259