解决rdlc报表打包后，显示安全错误的方法

开发环境：VS2008

报表：微软的rdlc

代码时，运行正常。制作安装包后，显示报表出错，出错类型为

 An error occurred during local report processing.Failed to load expression host assembly.Details:Requestfor the permission of type 'System.Security.Permissions.SecurityPermission, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' failed

解决办法：在报表预览窗体，增加代码

            reportViewer1.LocalReport.ExecuteReportInCurrentAppDomain(Assembly.GetExecutingAssembly().Evidence);
            reportViewer1.LocalReport.AddTrustedCodeModuleInCurrentAppDomain("System.Security.Permissions.SecurityPermission, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089");

 编译后，重新打包，运行正常。

网上说，如果开发环境为VS2010

那么需要增加代码：

var reportInstance = new LocalReport();
reportInstance.SetBasePermissionsForSandboxAppDomain(new PermissionSet(PermissionState.Unrestricted));
或
var permissionSet =newPermissionSet(PermissionState.None);
var flags =SecurityPermissionFlag.Execution|SecurityPermissionFlag.ControlPrincipal;
var permission =newSecurityPermission(flags);
permissionSet.AddPermission(permission);
ReportViewer.LocalReport.SetBasePermissionsForSandboxAppDomain(permissionSet);
具体是否能行，没有试验。