C# - How To Intercept Any Postback In A Webpage
Feb 10, 2010I want to intercept any postbacks in the current page BEFORE it occurs . I want to do some custom manipulation before a postback is served. how to do that?
View 5 Replies
Similar Messages:
Refresh Label On Webpage Without Postback?
Sep 2, 2010In my web page i got a button and when this button is clicked it will display message on the label.
Example : label text changed from "Start" to "Processing to "Completed". Therefore I want to refresh the label text on my web page so from user site they are able to see the text on Label is changing..
Web Forms :: Avoid Vertical Jerking On Postback In Webpage
Jul 26, 2010My web page has more contents and have the vertical scroll. when i was on the middle of the page i click the button (or any postback process) then the click event do some process on postback. after this postback event the page is jerking and moved slightly to top automatically. this is the issue. it should be in the same place on every postback. how to fix the vertical scroll in the same position on postbacks.
View 2 RepliesAJAX :: Put A Updateprogress Into A Webpage Where Selection From The Dropdownlist Causes Postback
Jun 23, 2010I'm trying to put a updateprogress into a webpage where selection from the dropdownlist causes postback. Works out well except that on the first postback, the gif image shows on the leftside rather than on the center. On succeeding postback, it will show on the centre where I intend it to be. Below is my code:
[Code]....
Web Forms :: How To Maintain Scroll Position On Postback In Webpage In FireFox And Chrome
Feb 8, 2013I tried some methods to maintain scroll position on postback but none worked they are
1) In page declaration MaintainScrollPositionOnPostback="true"
2) In Code behind Page.MaintainScrollPositionOnPostBack = true
3)In web.config file in <system.web> section <pages maintainScrollPositionOnPostBack="true" />
I am not using any updatepanel.
Web Forms :: Create Dynamic Radio Buttons In Webpage And Then Access Their Values In Postback?
Mar 24, 2011I need to create dynamic radio buttons in my page, and then access their values in postback
I create the buttons using the following code:
[Code]....
In the post back I try to access the radio buttons using their created ID:
[Code]....
But it seems that the find method is never finding the Radio button control.
Best Way To Intercept Control Rendering?
Jan 13, 2011I have a control used in our CMS and we don't have the source code for it, what I would like to do is change the rendered output of this control.
Now, I could have a check in my base Page class that checks if the control is being used on the page and then change the html that needs to be altered, but that seems a bit excessive for just 1 usage.
So is there any other way of changing the behaviour of the control without the source code? I'm thinking not other than the way described above.
C# - HttpModule Does Not Intercept Js And Css Files In IIS 5.1.
Feb 14, 2011I am implementing HttpModule for compressing request.Below is the codee for HttpModule:
public class Global : IHttpModule
{
public void Init(HttpApplication app)
{[code]....
It's able to intercept and compress js and css in the development web server but when i run it from IIS 5.1 it is not able to compress js and css files.
How To Intercept 401 From Forms Authentication In MVC?
May 28, 2010I would like to generate a 401 page if the user does not have the right permission.
The user requests a url and is redirected to the login page (I have deny all anonymous in web.config). The user logs in successfully and is redirected to the original url. However, upon permission check, it is determined that the user does not have the required permission, so I would like to generate a 401. But Forms Authentication always handles 401 and redirects the user to the login page.
To me, this isn't correct. The user has already authenticated, the user just does not have the proper authorization.
In other scenarios, such as in ajax or REST service scenario, I definitely do not want the login page - I need the proper 401 page.
So far, I've tried custom Authorize filter to return ViewResult with 401 but didn't work. I then tried a normal Action Filter, overriding OnActionExecuting, which did not work either.
What I was able to do is handle an event in global.asax, PostRequestHandlerExecute, and check for the permission then write out directly to response:
if (permissionDenied)
{
Context.Response.StatusCode = 401;
Context.Response.Clear();
Context.Response.Write("Permission Denied");
Context.Response.Flush();
[code]....
First of all, I'm not even sure if that is the right event or the place in the pipeline to do that.
Second, I want the 401 page to have a little more content. Preferably, it should be an aspx page with possibly the same master page as the rest of the site. That way, anyone browsing the site can see that the permission is denied but with the same look and feel, etc. but the ajax or service user will get the proper status code to act on.
Intercept What's Being Written To HttpResponse.OutputStream
Feb 17, 2010I am working on a tool which audits access to existing web application. Existing app does not have any hooks in place, but my plan is to inject an IHttpModule by modifying web.config and log whatever I need to log during EndRequest event.
What I'm struggling with right now is: I cannot intercept what is application writing to an output stream. I need to know what output does the application send to the client. Originally, I hoped I could run a code in BeginRequest to replace HttpContext.Response.OutputStream with a stream of my own, which would be flushed to original stream during EndRequest, but the stream only has a get accessor, so I cannot replace it.
I could of course use reflection to assign to private member of HttpContext.
WCF / ASMX :: Is It Possible To Intercept Web Service Call
Feb 28, 2011n my A.aspx, I will call web method GetName in B.asmx
Is it possible, before my A.aspx call GetName in B.asmx, I inject or put some codes so when A.aspx try to call the method, it needs to go through my injected code without even changing the code in A.aspx and B.asmx?
Is custom HttpModule able to handle this scenario? If yes, how? Which HttpModule's event that occurred before the page actually called the web service?
How To Intercept An Authentication Request In Webform
Nov 30, 2010I have user's who are losing their data because they sit on a page too long, then are asked to log back in. I want to do the following:
1) Instead of redirecting them to a login page, I want to cancel the current request and give the user a popup dialog box to login with.
2) When the login is successful, I want the user to be sent back to their form, with all data intact. (Even better if the request could go through without sending them back to that form, but this is optional).
How can I intercept these authentication requests, and present the user with a popup login?
I am using ASP.net forms authentication.
.net - Interrupt/intercept MVC Actions Using ActionFilters?
Jul 1, 2010I wish to be able to place a System.Web.ActionFilterAttribute on an Action Method and override the OnActionExecuting method to insert business logic which determines if the Action should be fulfilled. Can the ActionExecutingContext be used to cancel the executing Action Method and do one of the following:
Send an HTTP Status Code (and the corresponding <customError> page).Execute a different Action Method within the same Controller.
Web Forms :: How To Intercept An Error During A Update Of Gridview
Mar 24, 2010i hava a gridview, with an sqldatasource control, if an update event goes to faili want intercept the error and manage ithow can i do? i cannot find the error event in gridview
View 2 RepliesIis - Is There A Way To Preempt File Checking And Intercept The Requests
Mar 25, 2010I have installed an HttpModule into my web app that will handle all requests with a given file extension.
I want ASP.NET to handle all requests with the extension, regardless of whether there is an underlying file on disk. So, when I added the extension to the 'Application Extension Mappings', I unchecked the 'Verify that file exists' checkbox.
However, this just transfers the file check to ASP.NET rather IIS, so I just get a different error page when requesting URLs with the file extension.
Is there a way to preempt this ASP.NET file checking and intercept the requests?
Intercept Processing When Session.IsNewSession Is True?
Mar 15, 2010I have a small 4-page application for my customers to work through. They fill out information. If they let it sit too long, and the Session timeout out, I want to pop up a javascript alert that their session has expired, and that they need to start over. At that point, then redirected to the beginning page of the application.
I'm getting some strange behavior. I'm stepping through code, forcing my Sessioni.IsNewSession to be true. At this point, I write out a call to Javascript to a Literal Control placed at the bottom of the . The javascript is called, and the redirection occurs.
However, what is happening is.. I am pressing a button which is more or less a "Next Page" button and triggering this code. The next page is being displayed, and then the Alert and redirection occurs. The result I was expecting was to stay on the same page I received the "Timeout", with the alert to pop-up over it, then redirection.
I'm checking for Session.IsNewSession in a BaseClass for these pages, overriding the OnInit event.
Query String - How To Intercept And Pre-process QueryStrings
Mar 24, 2010We send out registration urls to clients via email. Some of the email clients are turning the url intourl <url>I think it may be happening when users forward the email onto themselves at which point the email client re-formats the original email (maybe)[URL]Which rightly producesSystem.Web.HttpRequestValidationException: A potentially dangerous Request.QueryString value was detectedWhere in the code should I intercept these instances and santize the url so that the user is re-directed onto the original form of the url?
View 1 RepliesIntercept Output From Default Handler With Another HttpHandler?
Mar 18, 2011I have set up an HttpHandler for *css to do some simple parsing:
<handlers>
<add name="CssHandler" verb="*" path="*.css"
type="MyApp.CssProcessor,MyApp.Assembly"/>
</handlers>
All was well until I added a resource that loads a css file dynamically, e.g.
<link rel="stylesheet" type="text/css" href="/loader.ashx/module.resource.css" >
To my surprise, things went horribly wrong. The custom http handler intercepts this, but since it's designed to just load files from the file system, it doesn't work. I realize that, technically, it matches a pattern *.css but that seems an odd behaviour, since the actual resource being requested from the web server is *.ashx and the css is only after the file path, as a parameter.
Is it possible to make the filter for a handler only apply to the actual server resource name?
Alternatively (and actually I'd like to know how to do this anyway) -- what I would really rather be doing is intercepting the output from the default css handler. That is, rather than having all my own code to actually load files from the file system in my CSS handler, it seems it would be far simpler to just take the response from the default handler and filter it. Which would have worked properly in this situation.
Finally, in either case, I'd much rather be filtering on resource MIME type text/css rather than intercepting requests by name, since what I really want to do is filter any CSS (rather than anything that happens to be named "*.css"). how to do this?
Jquery - Intercept / Get Notified About Asynchronous Requests?
Sep 20, 2010I need to get notified about asynchronous requests in ASP.NET. I used the jQuery .ajaxSend global event but it does not trigger when using UpdatePanels.
Is there a multi-browser way to detect when a request is being made on a page?
Intercept Page Object Creation To Hook Up Events
Sep 11, 2010I'm looking for a way to intercept the ASP.NET processing pipeline in such a way to be able to register event handlers to all events on the Page class. The reason is, I need to maintain a session-bound instance of a component that needs to be notified of all important Page events, starting from OnPreInit.
There's an arbitrary number of Page descendants in the application, which are not under my control. Hence I cannot use an approach like using a single custom descendant, that would notify the session-bound component, as a base class for all pages in the web application.
I don't think creating a custom IHttpHandler or IHttpModule implementation would solve the problem. Also note I cannot create a custom HttpApplication descendant.
How To Intercept Raw Soap Request/response (data) From WCF Client
May 10, 2010This question seems to be pretty close to what I am looking for - I was able to setup tracing and I am looking at the log entries for my calls to the service.However I need to see the raw soap request with the data I am sending to the service and I see no way of doing that from the SvcTraceViewer (only log entries are shown but no data sent to the service) - am I just missing configuration?
<system.diagnostics>
<sources>
<source name="System.ServiceModel"
switchValue="Verbose"
propagateActivity="true">
[code]...
Intercept Manual Refresh In Inserting Db Action Page?
Oct 22, 2010i have a e-commerce page which send data to last page for the payment...
In this last page, the user confirm his intention to acquire products .... In this moment, i've created a sub which insert a new order in the database...all works!...
The problem born when i try (and user could too) to manually refresh the page...the code will be processed again and a new (second) order will be inserted in the database.....it's not correct...
This page make a postback after confirm button....so control page.ispostback will not resolve problem...
How could i intercept manual refresh of this page in a secure way ?
ADO.NET :: Intercept/extend Createquery In Entityframework To Allow Global Filter?
Feb 22, 2011I have not found any way to intercept or override calls to createquery in my datacontext. What I am trying to do is to allow for global filters, i.e. if a user has access to only a subset of entities I would like to filter away these on the lowest level possible. Is there a way to do this? I have tried several apporaches but no one worked out. Perhaps I lack patience or is just plain stupid, but I think it should be possible! So if anyone has any pointers to where
View 2 RepliesIntercept Ajax Requests With Jquery To Display BlockUI?
Apr 7, 2010i'm trying to intercept ajax requests with jquery, to display a waiting message like with using plugin BlockUI, but how can i intercept requests sended by the UpdatePanel provided from asp.net framework, is some way to take the trigger?
View 2 RepliesC# - To Intercept And Modify The Html Output Stream In .net, To Combine The Javascript?
Jan 5, 2011Is there some way to intercept the HTML output stream in asp.net and make modifications? Eg using httpmodules or something? I know this is possible using java servlets and assume there must be an elegant way to do this with asp.net.
My purpose is to combine the many javascript files into one composite script which has been minified/packed, to make the page load faster.Eg, if my page normally outputs the following in the page head:
<script type="text/javascript" src="/scripts/blah.js"></script>
<script type="text/javascript" src="/scripts/yada.js"></script>
I want to replace that with the following:
<script type="text/javascript" src="/scripts/all.js"></script>
(also i realise i'll have to create all.js somehow).
