ASP. net2.0 fileupload rejects access to the upload path

. ASPX page formCode:
<Form ID = "form1" runat = "server">
<Div>
<Asp: button id = "button1" runat = "server" text = "button" onclick = "button#click"/> <asp: fileupload id = "fileupload1"
Runat = "server"/>
</Div>
</Form>
Click Event code of button1:
This. fileupload1.saveas (server. mappath ("."));
The following error occurs:

"/Linkupload" Application Program Server error.

Access to path "D: \ HL \ upload/Download \ linkupload" is 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 the code.

Exception details:System. unauthorizedaccessexception: Access to path "D: \ HL \ upload/Download \ linkupload" is denied.

ASP. NET is not authorized to access the requested resources. 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 <identity impersonate = "true"/>, the identity will be an anonymous user (usually IUSR_machinename) or an authenticated user.

To grant ASP. NET access permissions 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:

This exception is generated only when compilation is performed in debug mode.Source code. To enable this feature, Perform one of the following steps and request the URL: 1. Add a "DEBUG = true" command at the top of the file that generated the error. For example: <% @ Page Language = "C #" DEBUG = "true" %> Or: 2. Add the following section to the application configuration file: <Configuration> <System. Web> <Compilation DEBUG = "true"/> </System. Web> </Configuration> Note that the second step will compile all the files in the given application in debug mode. The first step will only compile the specific file in debug mode. Important: running an application in debug mode will produce memory/performance system overhead. Before deploying a production solution, make sure that application debugging is disabled.

Stack trace:

[Unauthorizedaccessexception: Access to path "D: \ HL \ upload/Download \ linkupload" is denied.] System. io. _ error. winioerror (int32 errorcode, string maybefullpath) + 1971539 system. io. filestream. init (string path, filemode mode, fileaccess access, int32 rights, Boolean userights, fileshare share, int32 buffersize, fileoptions options, security_attributes secattrs, string msgpath, Boolean bfromproxy) + 998 system. io. filestream .. ctor (string path, filemode mode) + 65 system. web. httppostedfile. saveas (string filename) + 84 system. web. UI. webcontrols. fileupload. saveas (string filename) + 24 _ default. button#click (Object sender, eventargs e) + 44 system. web. UI. webcontrols. button. onclick (eventargs e) + 75 system. web. UI. webcontrols. button. raisepostbackevent (string eventargument) + 98 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) + 4921

Version: Microsoft. NET Framework Version: 2.0.50727.832; ASP. NET version: 2.0.50727.832