Access to the path xxx is denied ASP.NET is not authorized to access the requested resource

Introduction

One day i face this following error,when i'm try to read a file.

ACCESS TO THE PATH 'C:\XXX\AA.XML' IS DENIED.

System.UnauthorizedAccessException: Access to the path 'C:\xxx\aa.xml' is denied.

ASP.NET is not authorized to access the requested resource. Consider granting access rights to the resource to the ASP.NET request identity. ASP.NET has a base process identity (typically {MACHINE}\ASPNET on IIS 5 or Network Service on IIS 6) that is used if the application is not impersonating. If the application is impersonating via , the identity will be the anonymous user (typically IUSR_MACHINENAME) or the authenticated request user.

Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.UnauthorizedAccessException: Access to the path 'C:\xxx\aa.xml' is denied.

ASP.NET is not authorized to access the requested resource. Consider granting access rights to the resource to the ASP.NET request identity. ASP.NET has a base process identity (typically {MACHINE}\ASPNET on IIS 5 or Network Service on IIS 6) that is used if the application is not impersonating. If the application is impersonating via , the identity will be the anonymous user (typically IUSR_MACHINENAME) or the authenticated request user.

To grant ASP.NET access to a file, right-click the file in Explorer, choose "Properties" and select the Security tab. Click "Add" to add the appropriate user or group. Highlight the ASP.NET account, and check the boxes for the desired access.
 

Source Error:

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.

Stack Trace:

[UnauthorizedAccessException: Access to the path 'C:\xxx\aa.xml' is denied.]    System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath) +651    System.IO.File.Delete(String path) +157    Admin_PropertyEdit.GenerateXML(Int64 pPropertyID, String pPropertyTypeName) +124    Admin_PropertyEdit.btnRemove_Click(Object sender, EventArgs e) +248    System.Web.UI.WebControls.Button.OnClick(EventArgs e) +105    System.Web.UI.WebControls.Button.RaisePostBackEvent(String eventArgument) +107    System.Web.UI.WebControls.Button.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String eventArgument) +7    System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument) +11    System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData) +33    System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +1746

The Reason for Error

Hit above error when trying to write a xml file in the web server. I've tried to set write permission for both internet guest user & also ASP.NET user but still the same.

Solutions

Finally, i add into web.config and the problem solve.

<identity impersonate="true"/>

Syntax

<configuration>
<system.web>
<identity impersonate="true"/>
</system.web>
</configuration >

Hit

I'm not sure why, to know more, please check on

http://msdn.microsoft.com/en-us/library/72wdk8cc.aspx

I hope this is help and save your time.