Currently for my back button I'm using window.history.back() which, in itself is working properly. My issue is with an iframe that I have for refreshing sessions, example
<iframe src="https://example.com/some/path?gcp-iap-mode=SESSION_REFRESHER" style="width:0;height:0;border:0; border:none;"></iframe>
Path in my project represents current url, so it keeps changing every time I change locations. Now, with the source the iframe has, it keeps throwing 404 and getting into my history so instead of clicking back button once, I have to do it at least two times - first times it fails as it tries to reach randompath?gcp-iap-mode=SESSION_REFRESHER and then it goes to proper path.
My question is, is there a way for me to check the "back" value, to see if the "back" value has a specific query (for example gcp-iap-mode part), or check if it's the same as a current location (duplicate) so I can skip that entry (and couple of back steps) and go back to a different path in history stack?
Seems an issue like this is common in iframes. I tried looking at it from a wrong perspective, by looking for ways to change history where the only thing that needed to be changed is the iframe itself.
Basically when we only change the src attribute of the iframe it gets rendered again and again and the src gets pushed to history stack. What we needed here was the iframe to unmount and the soultion to all of that was pretty simple - add a key prop to the iframe.
This is a blog page that helped me, so if somebody wants to read more:
https://www.aleksandrhovhannisyan.com/blog/react-iframes-back-navigation-bug/
In VS 2015, only when in Razor (.cshtml) files, roughly half of the time the autocomplete/suggestion list/intellisense doesn't work correctly (sorry, not sure the actual term... when you type an object and hit . and the list of properties and methods shows to select from)
The behavior is that when I hit ., the list popups up for a fraction of a second and then closes. It happens so fast I try to do a quick Backspace, ., Backspace, . cycle a few times to at least see the name I need, but I usually cant' get it and end up having to find the exact name elsewhere from code. Extremely irritating...
It happens sporadically with no real pattern I can find. Here's patterns that I've ruled out:
The file that's open doesn't seem to matter.
Whether or not I close/reopen the file doesn't seem to matter
Whether I navigate to another file and back doesn't seem to matter
It will work/not work multiple times on and off throughout the same file
It doesn't seem to be relevant to any particular object/property/method
I've checked all my options (there doesn't seem to be Text Editing options for Razor?), have tried clearing caches, the reloading solution/projects, restarting VS, all of which seem to still provide no pattern.
Has anyone come across this and have any ideas of where else I can look to fix it?
Example
Here's an extremely simple example... new project, very little code/files, very simple view. Where the Model. stops, I should have the usual base methods, and an 'Items' collection. It pops up for a split second then disappears... no lambdas/complex view parsing involved (this is reproducible as well):
Update: Patterns
Things I've noticed:
If I'm entering a #model ns.ns.ns.type, it rarely happens toward the "base" end of the namespaces. It's as I get further towards the type that it happens. This one is intermittent.
In some cases, it works perfectly fine, every single time. For example, I often use DevExpress tools, and have never seen the behavior on any of their extensions (so, #Html.DevExpress(). (and other similar, not necessarily DevEx models) will never cause a problem)
It happens almost all the time when I'm accessing my #Model (which is where I most want it!). I've found some cases where this is reproducible every time (see above example), but it's about 90%+
Occasionally, as I work through the object tree, one will fail while the next works (ex: #models ProjName.Web.App.Subscriptions.Models.AccountCreateVM... it might fail on Subscriptions but work fine on Models)
Occasionally, beginning to type the name within autocomplete kicks it back into gear and it starts working again. In the above example, starting to type Acc for AccountCreateVM causes it to start working again.
I haven't found the root cause, but in all cases, CTRL+SPACE works. This isn't the best, but light years better than nothing at all.
(this shortcut is not one I've used in the past, so this is likely standard behavior, but...) If you're at the dot Model. and autocomplete list disappears, CTRL+SPACE consistently brings it back up, and when it does come back, it stays! If there's only one possible autocomplete member, it'll auto-fill the member for you upon CTRL+SPACE
This happens for me all throughout VS2015 during lambda statements.
It happens when editing code "mid-document", as in, if there is anything besides a ) or } following where I'm typing. VS appears to be struggling to tell where the current statement ends & the next statement begins.
The following code will consistently fail to trigger Intellisense at the period, even when explicitly invoked.
var subset = initialSet.Where(x => x.
var result = new Whatever();
In Razor, it is very common to be editing code between existing text and using lambda statements:
<strong>#Html.DisplayFor(m => m.</strong>
This is probably why you only experience this in Razor.
The way I work around this bug is just to write the ) to close the method.
var subset = initialSet.Where(x => x.)
var result = new Whatever();
<strong>#Html.DisplayFor(m => m.)</strong>
Intellisense can then be triggered on the period.
If you're using a method that requires a minimum of more than just the lambda (like RadioButtonFor), you'll also need to put in a comma for each of the extra parameters.
<strong>#Html.RadioButtonFor(m => m.,)</strong>
If Intellisense is appearing, but immediately disappearing again, the best solution I've found so far is to just type a few letters of any known member, then using Ctrl-Left to skip back to the period, and trigger Intellisense again (Ctrl-Space or backspace-retype). This usually gets it to appear and stay. You'll have to delete the characters you typed afterwards, which can be frustrating.
Just make sure the ) does not touch the text you are editing, and the popup will stay up.
Instead of...
#Html.Partial("ManageGrid", Model.)
Use...
#Html.Partial("ManageGrid", Model. )
The intellisense seems to get confused by touching close parenthesis. Not ideal, but this was the only way I could get it to work for me consistently.
In my specific case, i was able to solve the problem by installing the latest version Microsoft ASP.NET and Web Tools.
https://marketplace.visualstudio.com/items?itemName=JacquesEloff.MicrosoftASPNETandWebTools-9689
Once I installed it, the problem was gone. It is likely that this update fixed something that could be fixed with an older version, but either way I'm happy.
(I found this in Visual Studio under Tools->Extensions and Updates...->Updates->Visual Studio Gallery)
I had the same error and I fixed it by deleting all the files of the component model cache.
This is the path:
Users\YourName\AppData\Local\Microsoft\VisualStudio\14.0\ComponentModelCache
Hope that helps
I use ctrl+j as a temporary solution when I know the content.
Or keep writing without right parenthesis can use the completion:
#Html.LabelFor(m => m.Name
Whenever this annoying thing happens to me, I just put an extra dot and then it works. I have to put the extra dot every time. For example, if I write this and intellisence flashes and disappears:
#Html.TextBoxFor(m => m.
then I just do this:
#Html.TextBoxFor(m => m..
And intellisense will now show after first dot. I have made this a habit until MS has a fix for it.
Instead of...
#Html.Partial("ManageGrid", Model.)
Use...
#Html.Partial("ManageGrid", Model.
I'm trying to use the history API but I can't get it working as I'd expect. I've look at several examples but they all appear to be doing something wrong. That is, this flow doesn't work as expected:
On new page call pushState
On popState load desired page
What I'm finding happens is that for #2 the URL is not modified to the old state (testing in Firefox). Unless I call pushState, or replaceState again the URL stays where it was. I'm also finding that somehow the first page ends up duplicated in the browser's history (holding down back I can see it).
How exactly should the history be used so that Back/Forward/Reload all work like a traditional page flow?
The problems I'm having relate to the use of an iframe in the page. Each change of the location of the frame creates a new history entry which messages with the desired history. To prevent this one must replace the iframe location instead of assigning a new one.
document.getElementById('content_frame').contentWindow.location.replace( new_path )
Location.replace doesn't create a history entry.
I am trying to make a push notification about Internet page update, but downloading the full page (700k) again every minute is quite troublesome for users. Is there is a way to download only a specific part of page?
As far as I have read there isn't any way to get delta information about the page. Is there a method which allows that? I haven't found one for a day (if there is, how can I locate the certain byte where my information is placed in the first place?
What you want to do is learn some basics in AJAX calls.
You set an auto timer to reload div contents on whatever needs to be updated.
You could use a Range header like this:
Range: bytes=0-1000
This will obviously get you the first 1000 bytes.
I am currently working on a GWT application that requires report
printing. The use can select report parameters from a screen, and
upon clicking print we would like to display the file as it is being
generated. Currently we have server side code that is generating HTML
and writing it to a file. When the user clicks print, an RPC is being
made to pass the report parameters to the server and begin the
report. A second RPC is made after the report has started to obtain
the report's URL. From here, we are creating a Frame and setting the
URL to be the URL retrieved by the second RPC.
The issue I am running into, is that when setUrl gets
called, it only displays as much HTML that was contained in the file
at the time of the call. What would be the best way to refresh just
the frame containing the HTML report? It appears making subsequent
calls to setUrl passing in the same Url each time would do the trick,
but it actually doesn't seem to contain the additional content that
would've been written since the last call. It is also resetting the
vertical scroll bar's position each time back to the top of the bar
which is something else I would like to prevent.
Is there a better way to go about doing this?
I think it would be better to request HTML in chunks from GWT and render them as they arrive. Doing this with ajax instead of wholesale refreshes will enable better behavior with the scrollbar, eliminate flashing, get around caching problems, and will also let you add some feedback like a progress bar, estimated time remaining, etc.
There's a lot more infrastructure required for this, but your suggested solution doesn't seem quite appropriate for the task.