Unauthorized Excel control InterOP. Excel in MS

Solution:
Click to start execution. Enter dcomcnfg and press Enter.
Find the Microsoft Excel application in DCOM Configuration Program
Set security: Add ASP. NET users to enable permission configuration and access permissions.
Then, check the interactive user or the specified system administrator user in the ID.
You can.

source error:
the error description is as follows:
Access denied.
Note: An error occurred while executing the current Web request. Check the stack trace information for details about the error and the source of the error in Code .
exception details: system. unauthorizedaccessexception: Access denied.
ASP. NET is not authorized to access the requested resource. Consider granting the ASP. NET Request identity the permission to access this resource. ASP. NET has a base process ID used when the application is not simulated (typically, {MACHINE} \ ASPnet on IIS 5 and Network Service on IIS 6 ). If the application is simulating through , the identity will be an anonymous user (usually IUSR_machinename) or an authenticated user.
to grant ASP. NET write access to a file, right-click the file in resource manager, select "properties", and select the "Security" tab. Click Add to add an appropriate user or group. Highlight the ASP. NET account and select the corresponding access permission box.
source error:
row 21: {
Row 22: // put the user code here to initialize the page
row 23: excel. application Excel = new excel. application ();