ASP.NET中模拟管理员用户提升权限

在asp.net的站点中需要调用本地EXCEL的COM组件，由于NetworkService用户的权限不够，在执行Shapes.AddPicture方法（图片大于33K左右）时会长时间无响应，需要用administrator用户来启动Excel进程才行。

上网查了一些资料，发现可以利用advapi32.dll来在asp.net应用中模拟administrator用户来启动Excel的进程，这样执行Shapes.AddPicture方法就正常了。

模拟用户的代码如下：

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using System.Runtime.InteropServices; using System.Security.Principal; using System.Security.Permissions;     private const int LOGON_TYPE_INTERACTIVE = 2; private const int LOGON_TYPE_PROVIDER_DEFAULT = 0; [DllImport("advapi32.dll", CharSet = CharSet.Unicode, SetLastError = true)] static public extern bool LogonUser(string userName, string domain, string password, int logonType, int   logonProvider, ref IntPtr accessToken);     public ExcelExport(string tableName) {     IntPtr accessToken = IntPtr.Zero;     if (LogonUser("administrator", "domain", "password", LOGON_TYPE_INTERACTIVE, LOGON_TYPE_PROVIDER_DEFAULT, ref   accessToken))     {           using (WindowsIdentity identity = new WindowsIdentity(accessToken))         {             using (WindowsImpersonationContext context = identity.Impersonate())             {                 this.m_tableName = tableName;                 if (ExcelRS == null)                 {                     ExcelRS = new Microsoft.Office.Interop.Excel.ApplicationClass();                     ExcelRS.Visible = false;                     ExcelRS.DisplayAlerts = false;                     ExcelRS.Interactive = false;                     ExcelRS.DisplayInfoWindow = false;                 }             }         }     } }