我在我的Winforms应用程序中使用了ReportViewer控件。报告包含一些表达式,因此它会尝试创建“表达式主机”程序集在临时文件夹中。除非我以管理员特权运行程序(即右键单击,选择'run as admin...'),否则我会收到以下错误消息:
"访问路径'C:\Users\user\AppData\Local\Temp\expression_host_351sf52dsf5.dll'被拒绝"
现在真正的问题在于,在客户的客户端机器上,用户没有访问管理员帐户的权限。我该怎么办?
我已经检查过,上述dll文件是在临时文件夹中创建的,但程序无法访问它。我还在属性窗口的安全选项卡中给了每个人完全控制的权限,但没有成功。
我还尝试在加载报告之前运行以下代码:
有没有一种方法可以防止它被删除?
"访问路径'C:\Users\user\AppData\Local\Temp\expression_host_351sf52dsf5.dll'被拒绝"
现在真正的问题在于,在客户的客户端机器上,用户没有访问管理员帐户的权限。我该怎么办?
我已经检查过,上述dll文件是在临时文件夹中创建的,但程序无法访问它。我还在属性窗口的安全选项卡中给了每个人完全控制的权限,但没有成功。
我还尝试在加载报告之前运行以下代码:
reportViewer1.LocalReport.SetBasePermissionsForSandboxAppDomain(new
System.Security.PermissionSet(System.Security.Permissions.PermissionState.Unrestricted));
还有这个:
reportViewer1.LocalReport.SetBasePermissionsForSandboxAppDomain(AppDomain.CurrentDomain.PermissionSet.Copy());
我已经花了几个星期的时间试图解决这个问题。这在我的机器和客户机上都发生过。欢迎任何想法。
编辑: 我注意到报告查看器尝试“删除”该文件,并出现错误。以下是堆栈跟踪:
Microsoft.Reporting.WinForms.LocalProcessingException: An error occurred during local
report processing. ---> Microsoft.Reporting.DefinitionInvalidException: The definition of the report 'D:\Projects\MyProject\bin\Reports\Report1.rdl' is invalid. ---> Microsoft.ReportingServices.ReportProcessing.ReportProcessingException: An unexpected error occurred in Report Processing. ---> System.UnauthorizedAccessException: Access to the path 'C:\Users\User1\AppData\Local\Temp\expression_host_2bc11a902f7142e9a62bb28fd36c2d26.dll' is denied.
at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath)
at System.IO.File.Delete(String path)
at Microsoft.ReportingServices.RdlExpressions.ExprHostCompiler.InternalCompile(Report report, AppDomain compilationTempAppDomain, Boolean refusePermissions)
at Microsoft.ReportingServices.RdlExpressions.ExprHostCompiler.<>c__DisplayClass1.<Compile>b__0()
at Microsoft.ReportingServices.Diagnostics.RevertImpersonationContext.<>c__DisplayClass1.<Run>b__0(Object state)
at System.Security.SecurityContext.Run(SecurityContext securityContext, ContextCallback callback, Object state)
at Microsoft.ReportingServices.Diagnostics.RevertImpersonationContext.Run(ContextBody callback)
at Microsoft.ReportingServices.RdlExpressions.ExprHostCompiler.Compile(Report report, AppDomain compilationTempAppDomain, Boolean refusePermissions)
at Microsoft.ReportingServices.ReportPublishing.ReportPublishing.Phase3(ICatalogItemContext reportContext, ParameterInfoCollection& parameters, AppDomain compilationTempAppDomain, Boolean generateExpressionHostWithRefusedPermissions, Dictionary`2& groupingExprCountAtScope)
at Microsoft.ReportingServices.ReportPublishing.ReportPublishing.CreateIntermediateFormat(ICatalogItemContext reportContext, Byte[] definition, IChunkFactory createChunkCallback, CheckSharedDataSource checkDataSourceCallback, ResolveTemporaryDataSource resolveTemporaryDataSourceCallback, DataSourceInfoCollection originalDataSources, PublishingErrorContext errorContext, AppDomain compilationTempAppDomain, Boolean generateExpressionHostWithRefusedPermissions, IDataProtection dataProtection, String& description, String& language, ParameterInfoCollection& parameters, DataSourceInfoCollection& dataSources, UserLocationFlags& userReferenceLocation, ArrayList& dataSetsName, Boolean& hasExternalImages, Boolean& hasHyperlinks)
at Microsoft.ReportingServices.ReportProcessing.ReportProcessing.CompileOdpReport(ICatalogItemContext reportContext, Byte[] reportDefinition, IChunkFactory createChunkCallback, CheckSharedDataSource checkDataSourceCallback, ResolveTemporaryDataSource resolveTemporaryDataSourceCallback, DataSourceInfoCollection originalDataSources, PublishingErrorContext errorContext, AppDomain compilationTempAppDomain, Boolean generateExpressionHostWithRefusedPermissions, IDataProtection dataProtection, String& reportDescription, String& reportLanguage, ParameterInfoCollection& parameters, DataSourceInfoCollection& dataSources, UserLocationFlags& userReferenceLocation, ArrayList& dataSetsName, Boolean& hasExternalImages, Boolean& hasHyperlinks)
at Microsoft.ReportingServices.ReportProcessing.ReportProcessing.CreateIntermediateFormat(ICatalogItemContext reportContext, Byte[] reportDefinition, IChunkFactory createChunkFactory, CheckSharedDataSource checkDataSourceCallback, ResolveTemporaryDataSource resolveTemporaryDataSourceCallback, DataSourceInfoCollection originalDataSources, AppDomain compilationTempAppDomain, Boolean generateExpressionHostWithRefusedPermissions, ReportProcessingFlags processingFlags, IDataProtection dataProtection)
File.Delete()
在 ExprHostCompiler.InternalCompile()
中被调用。通过反射查看,可以看到它是这样发生的(在 finally
内的最后代码块中查看):
private byte[] InternalCompile(Report report, AppDomain compilationTempAppDomain, bool refusePermissions)
{
if (this.m_builder.HasExpressions)
{
CompilerParameters options = new CompilerParameters {
OutputAssembly = string.Format(CultureInfo.InvariantCulture, "{0}{1}.dll", new object[] { Path.GetTempPath(), report.ExprHostAssemblyName }),
GenerateExecutable = false,
GenerateInMemory = false,
IncludeDebugInformation = false
};
options.ReferencedAssemblies.Add("System.dll");
options.ReferencedAssemblies.Add(typeof(ReportObjectModelProxy).Assembly.Location);
options.CompilerOptions = options.CompilerOptions + this.m_langParser.GetCompilerArguments();
if (report.CodeModules != null)
{
this.ResolveAssemblylocations(report.CodeModules, options, this.m_errorContext, compilationTempAppDomain);
}
CompilerResults results = null;
try
{
CodeCompileUnit exprHost = this.m_builder.GetExprHost(report.IntermediateFormatVersion, refusePermissions);
report.CompiledCodeGeneratedWithRefusedPermissions = refusePermissions;
CodeDomProvider codeCompiler = this.m_langParser.GetCodeCompiler();
results = codeCompiler.CompileAssemblyFromDom(options, new CodeCompileUnit[] { exprHost });
if (Global.Tracer.TraceVerbose)
{
try
{
using (MemoryStream stream = new MemoryStream())
{
IndentedTextWriter writer = new IndentedTextWriter(new StreamWriter(stream), " ");
codeCompiler.GenerateCodeFromCompileUnit(exprHost, writer, new CodeGeneratorOptions());
writer.Flush();
stream.Position = 0L;
Global.Tracer.Trace(new StreamReader(stream).ReadToEnd());
}
}
catch
{
}
}
if ((results.NativeCompilerReturnValue != 0) || (results.Errors.Count > 0))
{
this.ParseErrors(results, report.CodeClasses);
return new byte[0];
}
using (FileStream stream2 = File.OpenRead(results.PathToAssembly))
{
byte[] buffer = new byte[stream2.Length];
int num = stream2.Read(buffer, 0, (int) stream2.Length);
Global.Tracer.Assert(num == stream2.Length, "(read == fs.Length)");
return buffer;
}
}
finally
{
if ((results != null) && (results.PathToAssembly != null))
{
File.Delete(results.PathToAssembly); //<------- Here!
}
}
}
return new byte[0];
}
有没有一种方法可以防止它被删除?