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  • Object reference not set to an instance of an object.....?

    - by jamal
    Hi guys I always got this error from my site and it keeps bugging me.I've been trying to figure out the cause of this error but I can't really figure it out. Here's the stacktrace: at BasePage.Page_PreInit(Object sender, EventArgs e) at System.EventHandler.Invoke(Object sender, EventArgs e) at System.Web.UI.Page.OnPreInit(EventArgs e) at System.Web.UI.Page.PerformPreInit() at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) And on my basepage I only got this code: Imports Microsoft.VisualBasic Public Class BasePage Inherits System.Web.UI.Page Private Sub Page_PreInit(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.PreInit Page.Theme = "Something" If (Request.UserAgent.IndexOf("AppleWebKit") 0) Then Request.Browser.Adapters.Clear() End If End Sub Private Sub Page_PreRender(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.PreRender If Me.Title = "Untitled Page" Then Throw New Exception("Page title cannot be ""Untitled Page"".") End If End Sub End Class According to the stacktrace this always happens on my basepage preinit event.What do you think is the problem here guys?

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  • Java application if/case recommendation

    - by Jesse
    I am writing an application for a Java course. I am a complete beginner and am just going off material I have learned from the course and from the web. The application is exhibiting some behavior and I am not sure what is causing it. The application is GUI based and does calculations on user input. For the action listener section, I have a set of If statements such as: "if this button do this if this button do this" All in a row like that. It seems as if the application is running ALL the if statements instead of running the one that corresponds with the button pressed. Would I be better off using a case/switch structure for this sort of thing? I can post my code if necessary, I am new around this site and am not sure if that thing is acceptable.

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  • Lightweight HTTP application/server for static content

    - by PartlyCloudy
    Hi, I am in need of a scalable and performant HTTP application/server that will be used for static file serving/uploading. So I only need support for GET and PUT operations. However, there are a few extra features that I need: Custom authentication: I need to check credentials against a database for each request. Thus I must be able to integrate propietary database interaction. Support for signed access keys: The access to resources via PUT should be signed using a key like http://uri/?key=foo The key then contains information about the request like md5(user + path + secret) which allows me to block unwanted requests. The application/server should allow me to check for this. Performance: I'd like to avoid piping content as much as possible. Otherwise the whole application could be implemented in Perl/etc. in a few lines as CGI. Perlbal (in webserver mode) looks nice, however the single-threaded model does not fit with my database lookup and it does also not support query strings. Lighttp/Nginx/… have some modules for these tasks, however it is not feasible putting everything together without ending up writing own extensions/modules. So how would you solve this? Are there other leightweight webservers available for this? Should I implement an application inside of a webserver (i.e. CGI). How can I avoid/speed up piping content between the webserver and my application. Thanks in advance!

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  • Asp.Net Error Message:Unable to validate data

    - by Amitabh
    We have a Asp.Net Webform page which contains a GridView inside UpdatePanel and refreshes every minute. And every one minute we get the following error in Event log. Error Message:Unable to validate data. Stack Trace: at System.Web.Configuration.MachineKeySection.GetDecodedData(Byte[] buf, Byte[] modifier, Int32 start, Int32 length, Int32& dataLength) at System.Web.UI.ObjectStateFormatter.Deserialize(String inputString). We have tried the following. Adding a static machine key in the Web.Config. (Did not work?) Disabling the View State Mac in the Web,.Config using following entry. (Did not work) <pages buffer="true" enableViewStateMac="false"> Is there something else that might cause this?

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  • how use ASP.NET_SessionId cookies to check timeout for 2 different web applications

    - by user553858
    Hi All I am developing 2 web applications based on "ASP.NET_SessionId" cookies to check session timeout and also to logout : protected void Session_Start(object sender, EventArgs e) { if (Context.Session != null) { //check the IsNewSession value, this will tell us if the session has been reset if (Session.IsNewSession) { string cookie = Request.Headers["Cookie"]; // Code that runs when a new session is started if ((null != cookie) && (cookie.IndexOf("ASP.NET_SessionId") >= 0)) { if (Request.QueryString["timeout"] == null || !Request.QueryString["timeout"].ToString().Equals("yes")) Session.Abandon(); Session.Clear(); Response.Redirect("Login.aspx?timeout=yes"); } } } } This works fine for my first application. When implementing the same logic for the 2nd application when I press logout in one application, the second application is redirected to the login page. How can I fix this? Best regards

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  • Custom Control Same Assembly - Visual Web Part

    - by FullyManaged
    Hi, I am working on a Visual Web Part which requires creating a custom control. I am trying to add custom control to the same assembly as Visual Web Part and registering control as: <%@ Register TagPrefix="cus" Namespace="SomeCustomControlNameSpace" % When I am trying to access this its throwing runtime error : Unknown server tag 'cus:ControlName'. Do I need to make any Web.Config entry for this? Any Ideas?

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  • how to run web application in another machine?

    - by angel ansari
    hi, I want to run my web application in another machine.My problem is that i have already created virtual directory in iis 7.5 and add web application in it. Its running in my machine properly but i am trying it run in another machine through url and add the ip address along port number but its not found the web page.Plz help me .

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  • Recommend me a good book/source for learning for Web Design

    - by Idlecool
    Hi, While web development/design, I found coding it self is not enough to develop an attractive website so i have urge to learn photoshop.. i want to know what can be the best way to learn photoshop (preferably Photoshop CS4 Extended) mainly for website design. I experienced web tutorials are not enough for effectively learning computer languages, but not sure about photoshop coz it is a different job.. please recommend me a book / web tutorial for learning Photoshop.

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  • update iphone application behaviour

    - by Jim
    Hi, I developed one database related application for iPhone device(SQlite database). Now i want to update that application with more features(I want to push an update for the same application). Here i am more concerned about the user data while pushing the update so my question is if i will push an update then does the update will clear all the data that is stored in .sqlite file? if this is case then how to push application update without modifying the previous data in the database file? Please suggest. Thanks, Jim.

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  • Run ClickOnce Application from CLI

    - by Badger
    I am working on an auto-install script for where I work and we have a ClickOnce type application we use from a vendor. I have looked into it and we can't automate the install but we would like to be able to at least start the install automatically. I have tried rundll32.exe dfshim.dll,ShOpenVerbApplication "%SOFTWARE%\ToolsApp.application" but it gives me an error about an invalid URI. What would probably be the easiest is to use whatever program Windows has (Windows XP in our case) to run the default "handler" for the file. I don't know if any such thing exists, but that is what comes to mind.

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  • How to implement openId java web based application?

    - by satya
    In my web application i want to implement the OpenId just like stackoverflow.com have to login to its web-site. In details you find while login to stackoverflow.com So when if one choose google then it allow the uses to log in through google account. Please tell me how to implement it in java web application in details. Is there any single api for login through different website like(yahoo,google,facebook,etc) Thanks

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  • How to create a web proxy?

    - by Rakesh Juyal
    I want to create web proxy . I googled it and even found some tutorial but those were in PHP. If somebody is having tutorial of web proxy creation in java then please post it here Or simply let me know what approach should i follow to create web proxy. [ i will be using Tomcat { if that matters for your answer } ] Thanks Edit i guess i was not clear in stating what i require. Actually i am trying to develop a site like 'http://proxyug.com/' .

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  • Developing multiple user interfaces for an application

    - by denizkocak
    I want to develop an application which has a graphical user interface that could be developed by using different widget toolkits. For example I want to use Qt, GTK+ or even ncurses as a building block for my user interface for the same application. Moreover users could choose which GUI implementation will be used during the next startup of the application without recompiling it first. I wonder what are possible design strategies and design patterns used in the implementation of this design?

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  • Application self aware of external database record modifications.

    - by Khou
    How do you make your application aware that a database record was changed or created by an external application rather than the application itself? Do you add a special check sum to the database record or what do you do to stop external changes to the database? (in case it was hacked and the hacker decides to add a new record or change an existing database record)

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  • Regarding focusing on the web part on a site on sharepoint after clicking

    - by Brigadier Jigar
    Hi Friends, I have deployed 3 web parts on a site on Sharepoint server. In my 3rd web part, I have a functionality which needs a button click. Now when I click that button, the whole page gets refreshed and I have to scroll down to see the change that has happened due to clicking that functionality in 3rd web part. Is there any way by which when i click on any point of the web part, the page is reloaded but the control point or the focus remains to the same position where I clicked... Help me out. Regards, Jigar

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  • Java: Convenient way to refactor the application.

    - by Harshal
    Hi, Everyone We have an agile enterprise application built on JSP and Servlet without any design strategy. This application was built in early 2002 considering 1000 users. After 2002, we received lots of requests from the marketing partners. Currently, the application has lots of spaghetti code with lots of Ifs and elses. One class has more than 20,000 lines of code with a huge body of functions without abstraction. Now, we need to support billions of records, what we need to do immediately and gradually? We have to refactor the application? Which framework, we need to use? How the usage of the framework will be helpful to the end users? How to convince the leaders to do the refactoring? How to gain the faster response time as compare to the current system?

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  • Sending an email when an application crashes?

    - by Jay Kominek
    I've got a big piece of scientific equipment which is hooked up to, and controlled by software running on a Windows PC. Unfortunately the software, provided by the manufacturer, crashes occasionally when nobody is there to watch it. We'd really like a piece of software which could watch the application, and when it crashes, send out an email right away. Is there anything out there like that? EDIT: we want to monitor the application, which is a normal piece of Windows software, running on the PC. The mention of the equipment was just sort of background to explain why we cared.

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  • Password protect web service

    - by Henrik
    Hi! Is it possible to require user name and password for a web service without changing the code for existing web service? Adding a DLL and configuration would be OK, but I rather not change the web service.

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  • Java - How to change context root of a dynamic web project in eclipse

    - by Yatendra Goel
    I have developed a dynamic web project in eclipse. Now I can access it through my browser using the following url: http://localhost:8080/MyDynamicWebApp Now I want to change the access url to http://localhost:8080/app I changed the context root from the project properties | Web Project Settings | Context Root But it is not working. The web app still has the access url as earlier. I have re-deployed the application on tomcat, re-started the tomcat and have done everything that should be done but the access url is the same as earlier. I found that there were no server.xml file attached with the WARfile. The how the tomcat is determining that the context root of my web app is /MyDynamicWebApp and is allowing me to access the application through that url

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  • application blocking

    - by pradeep
    I have a application which runs over browser ...php application... i need to lock this application to only few machines and laptops that we allow to access. IP locking cannot be done as laptops can be on wifi from outside... Any Idea on how to do this?

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