c# - WebException Response attribute returns null -

-

i'm scanning single url has many paths example: http://url.com/path1 1000. webexception in catch block, throw nullreferenceexception error if don't use line
if (x.status == webexceptionstatus.protocolerror && x.response != null)

so question this: code below fix error or ignore it?

error don't have specific path error random http://url.com/path10 or other link :)

catch (webexception x) {     if (x.status == webexceptionstatus.protocolerror && x.response != null)     {         httpwebresponse response = (httpwebresponse)x.response;         if (response.statuscode == httpstatuscode.notfound)         {            listbox3.items.add(listbox1.items[i].tostring());         }     } }

according documentation webexception.response property

if response available internet resource, webresponse instance contains error response internet resource; otherwise, null.

so, if understand question correctly, is necessary test webexception.response null, meaning code correctly avoids nullreferenceexception rather 'ignoring' it.

hope helps.


Comments

Post a Comment

Popular posts from this blog

design - Custom Styling Qt Quick Controls -

-
Image
i have custom design qt quick controls. example, change background colour of tool bar, since hate default design. how can that? in qt quick controls, there limited styling available via qt quick control styles items, buttonstyle , checkboxstyle , etc. at moment, other styles require delving qt sources , messing internal details. here complete example of how 1 might modify toolbar's style. main.qml import qtquick 2.1 import qtquick.layouts 1.0 import qtquick.controls 1.0 applicationwindow { toolbar: toolbar { id: toolbar component.oncompleted: toolbar.data[0].item.children = [newrectangle]; property item _newrectangle: rectangle { // rectangle within toolbarstyle's panel // gleaned from: // http://qt.gitorious.org/qt/qtquickcontrols/source/ // c304d741a27b5822a35d1fb83f8f5e65719907ce:src/styles/base/toolbarstyle.qml id: newrectangle anchors.fill: parent...
Read more

Unable to remove the www from url on https using .htaccess -

-
i want remove www site url. ie. https://www.domainname.com.au https://domainname.com.au . i have tried various .htacces code nothing work me. here present code remove www http not work https. rewriteengine on rewritebase / rewritecond %{http_host} ^www\.(.*)$ [nc] rewriterule ^/(.*)$ http://%1/$1 [r=301,l] rewritecond %{https} off rewriterule ^(.*)$ https://domainname.com.au/$1 [r=301,l] rewriterule ^code-of-conducts/(.*)/$ code-of-conducts.php?type=$1 rewriterule ^parents/post-a-job/(.*)/edit/$ parents/post-a-job.php?action=edit&id=$1 rewriterule ^parents/post-a-job/(.*)/$ parents/post-a-job.php?job_type=$1 rewriterule ^parents/open-jobs/(.*)/delete/$ parents/open-jobs.php?action=delete&id=$1 rewriterule ^parent-profile/(.*)/$ parent-profile.php?id=$1 rewriterule ^parents/job-details/(.*)$ parents/job-details.php?applied_id=$1 rewriterule ^sitterprofile/(.*)/$ sitterprofile.php?id=$1 rewriterule ^sitter/job-board/state/(.*)/page/(.*)/$ sitter/job-board.ph...
Read more