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• Asp.Net Random Error

  - by John Boker

  At random times, twice in the past two weeks, the we application will start to error and not work until I recycle the app pool in IIS. The specific error and stacktrace are: System.Web.HttpUnhandledException: Exception of type 'System.Web.HttpUnhandledException' was thrown. ---> System.InvalidCastException: Unable to cast object of type 'System.Guid' to type 'System.String'. at System.Data.Linq.SqlClient.SqlProvider.Execute(Expression query, QueryInfo queryInfo, IObjectReaderFactory factory, Object[] parentArgs, Object[] userArgs, ICompiledSubQuery[] subQueries, Object lastResult) at System.Data.Linq.SqlClient.SqlProvider.ExecuteAll(Expression query, QueryInfo[] queryInfos, IObjectReaderFactory factory, Object[] userArguments, ICompiledSubQuery[] subQueries) at System.Data.Linq.SqlClient.SqlProvider.System.Data.Linq.Provider.IProvider.Execute(Expression query) at System.Data.Linq.DataQuery`1.System.Linq.IQueryProvider.Execute[S](Expression expression) at System.Linq.Queryable.FirstOrDefault[TSource](IQueryable`1 source) at DigitalScout.WEDS.Business.Slug.GetTeamPath(String teamID) at DigitalScout.WEDS.WebApp.Code.Navigator.TeamNavigator.Home(String teamID) at ASP.management_default_aspx.__DataBind__control7(Object sender, EventArgs e) at System.Web.UI.Control.OnDataBinding(EventArgs e) at System.Web.UI.Control.DataBind(Boolean raiseOnDataBinding) at System.Web.UI.Control.DataBindChildren() at System.Web.UI.Control.DataBind(Boolean raiseOnDataBinding) at System.Web.UI.WebControls.Repeater.CreateControlHierarchy(Boolean useDataSource) at System.Web.UI.WebControls.Repeater.OnDataBinding(EventArgs e) at System.Web.UI.Control.DataBindChildren() at System.Web.UI.Control.DataBind(Boolean raiseOnDataBinding) at System.Web.UI.WebControls.Repeater.CreateControlHierarchy(Boolean useDataSource) at System.Web.UI.WebControls.Repeater.OnDataBinding(EventArgs e) at DigitalScout.WEDS.WebApp.Management._default.Page_Load(Object sender, EventArgs e) at System.Web.Util.CalliHelper.EventArgFunctionCaller(IntPtr fp, Object o, Object t, EventArgs e) at System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e) at System.Web.UI.Control.OnLoad(EventArgs e) at DigitalScout.WEDS.WebApp.Code.BaseClass.Pages.ManagementPage.OnLoad(EventArgs e) at System.Web.UI.Control.LoadRecursive() at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) --- End of inner exception stack trace --- at System.Web.UI.Page.HandleError(Exception e) at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) at System.Web.UI.Page.ProcessRequest(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) at System.Web.UI.Page.ProcessRequest() at System.Web.UI.Page.ProcessRequest(HttpContext context) at ASP.management_default_aspx.ProcessRequest(HttpContext context) at System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) This error happens for every user of the system until the app pool is recycled. Any help on this would be helpful as we are not able to reproduce the error.

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• IsDouble check for string in Vb.net?

  - by James123

  I will get data in DataTable. I am going to iterate data in foreach. I will have all types of data in Datatable. Now I need to find Double for each item (string) in DataTable. How to find IsDouble for string? Ex: I have "21342.2121" string. I need to covert this to Double. But sometimes the data will be "TextString". So I can't use Double.Parse(). How to handle this?

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• Can a memory page be moved by modifying the page table?

  - by Adam

  Is it possible (on any reasonable OS, preferably Linux) to swap the contents of two memory pages by only modifying the page table and not actually moving any data? The motivation is a dense matrix transpose. If the data were blocked by page size it would be possible to transpose the data within a page (fits in cache) then swap pages to move the blocks into their final place. A large matrix would have many many pages moved, so hopefully flushing the TLB wouldn't cause trouble.

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• What's the best practice way to convert enum to string?

  - by dario

  Hi. I have enum like this: public enum ObectTypes { TypeOne, TypeTwo, TypeThree, ... TypeTwenty } then I need to convert this enum to string. Now Im doing this that way: public string ConvertToCustomTypeName(ObjectTypes typeObj) { string result = string.Empty; switch (typeObj) { case ObjectTypes.TypeOne: result = "This is type T123"; break; case ObjectTypes.TypeTwo: result = "This is type T234"; break; ... case ObjectTypes.TypeTwenty: result = "This is type last"; break; } return result; } Im quite sure that there is better way do do this, Im looking for some good practice solution. Thanks in advance.

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• JSONP context problem

  - by PoweRoy

  I'm using a javascript autocomplete () in a greasemonkey script. On itself it works correctly but I wan't to add JSONP because I want the data from another domain. The code (snippet): function autosuggest(url) { this.suggest_url = url; this.keywords = []; return this.construct(); }; autosuggest.prototype = { construct: function() { return this; }, preSuggest: function() { this.CreateJSONPRequest(this.suggest_url + "foo"); }, CreateJSONPRequest: function(url) { var headID = document.getElementsByTagName("head")[0]; var newScript = document.createElement('script'); newScript.type = 'text/javascript'; newScript.src = url +'&callback=autosuggest.prototype.JSONCallback'; //newScript.async = true; newScript.onload = newScript.onreadystatechange = function() { if (newScript.readyState === "loaded" || newScript.readyState === "complete") { //remove it again newScript.onload = newScript.onreadystatechange = null; if (newScript && newScript.parentNode) { newScript.parentNode.removeChild(newScript); } } } headID.appendChild(newScript); }, JSONCallback: function(data) { if(data) { this.keywords = data; this.suggest(); } }, suggest: function() { //use this.keywords } }; //Add suggestion box to textboxes window.opera.addEventListener('AfterEvent.load', function (e) { var textboxes = document.getElementsByTagName('input'); for (var i = 0; i < textboxes.length; i++) { var tb = textboxes[i]; if (tb.type == 'text') { if (tb.autocomplete == undefined || tb.autocomplete == '' || tb.autocomplete == 'on') { //we handle autosuggestion tb.setAttribute('autocomplete','off'); var obj1 = new autosuggest("http://test.php?q="); } } } }, false); I removed not relevant code. Now when 'preSuggest' is called, it add a script to the header and circumvent the crossdomain problem. Now when the data is received back 'JSONcallback' is called. I can use the data, but when 'Suggest' is I can't use the this.keywords array or this.suggest_url. I think this is because 'JSONcallback' and 'Suggest' are called in a different context. How can I get this working?

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• iphone download several files

  - by Floo

  hi all !  In my app i need to download several plist.  to download a plist i use the NSURLconnection  in my code i use an UIAlertView with a UIActivityIndicator then when the download is finished i add a button to the alert to dismiss it.  To download the plist i use somewhere in my code an NSURL set to the adresse where the plist is, next i set a NSURLRequest with the url cache policy and a timeout interval.  Then i set my NSMutableData to the NSURL connection with a NSURLRequest.  In the delegate didReceiveData: i append data to my mutable data object, in the didFailWithError: i handle error. And finaly in the connectionDidFinishLoading  i serialize my data to a plist so i can write to file my plist, and release my alertview.  My problem is : how can i do if i have sevetal file to download because the connectionDidFinishLoading is called each time my NSURLConnection is finished but i want to release my UiAlert when everything is finished. But when the first plist is downloaded my code in the connectionDidFinishLoading will fire.  here is my code :  in the view did load :  // set the UiAlert in the view did load  NSURL *theUrl = [NSURL URLWithString:@"http://adress.com/plist/myPlist.plist"]; NSURLRequest *theRequest = [NSURLRequest requestWithURL:theUrl cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:60.0]; self.plistConnection = [[ NSURLConnection alloc] initwithRequest:theRequest delegate:self startImmediatly:YES]; //plistConnection is a NSURLConnection - (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data {  [incomingPListData appendData:data]; } -(void)connection:(NSURLConnection *)connectionDidFailWithError:(NSError *)error { // handle error here  } -(void)connectionDidFinisloading:(NSURLConnection *) connection {  NSPropertyListFormat format; NSString *serialErrorString;  NSData *plist = [NSPropertyListSerialisation propertyListFromData:incomingPlistData mutabilityOption:NSPropertyListImmutable format:&format errorDescription:&serialErrorString]; if (serialErrorString) {//error} else { // create path and write plist to path} // change message and title of the alert so if i want todownload an another file  where do i put the request the connection and how can i tell the didFinishLoading to fire code when all my file are downloaded.  thanks to all

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• ASP.NET webservice API security.

  - by Tejaswi Yerukalapudi

  Hi, I have an iPhone app accessing an ASP.NET Webservice for data. Since I'm building both the ASP.NET end and the iPhone part of the app, and we'll shortly be publishing it in the Appstore, I'd like to know what security checks I need to make. The basic flow of the program (without divulging too much info about it) is as follows - . Login (Enter Username, pass on the app) . Primary screen where the data is loaded from a webservice and presented . And post data back after a few updates by the user I'm using POST to send the data to the Webservice via HTTPS. I'm sanitizing the inputs, checking for length of the inputs, but that's the limit of my knowledge as far as security goes. Any other tips are greatly appreciated! Edit: I should probably add that our service needs to be subscribed to separately and the iPhone component of it cannot be used alone. So the average user will not have login credentials. And the app itself has healthcare data in it, so I'd rather not have anyone trying attacks from my login page. Thanks, Teja.

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• Protocol Buffers In C#: How Are Boxed Value Types Handled

  - by Greg Dean

  In the following examples: public class RowData { public object[] Values; } public class FieldData { public object Value; } I am curious as how either protobuf-net or dotnet-protobufs would handle such classes. I am more familiar with protobuf-net, so what I actually have is: [ProtoContract] public class RowData { [ProtoMember(1)] public object[] Values; } [ProtoContract] public class FieldData { [ProtoMember(1)] public object Value; } However I get an error saying "No suitable Default Object encoding found". Is there an easy way to treat these classes, that I am just not aware of? To elaborate more on the use case: This is a scaled down version of a data class used in remoting. So essentially it looks like this: FieldData data = new FieldData(); data.Value = 8; remoteObject.DoSomething(data); Note: I've omitted the ISerializable implementation for simplicity, but it is as you'd expect.

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• WCF DataContract with readonly properties

  - by Asaf R

  I'm trying to return a complex type from a service method in WCF. I'm using C# and .NET 4. This complex type is meant to be invariant (the same way .net strings are). Furthermore, the service only returns it and never recieves it as an argument. If I try to define only getters on properties I get a run time error. I guess this is because no setters causes serialization to fail. Still, I think this type should be invariant. Example: [DataContract] class A { [DataMember] int ReadOnlyProperty {get; private set;} } The service fails to load due to a problem with serialization. Is there a way to make readonly properties on a WCF DataContract? Perhaps by replacing the serializer? If so, how? If not, what would you suggest for this problem? Thanks, Asaf

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• C# Win Forms Auto-Updating Controls

  - by Goober

  Hello! I have a datagridview and a combobox which get populated randomly with data. However, the new data is never displayed automatically. Someone mentioned the idea of invalidating the control to force the application to redraw it and thus iterate through the contents and populate the control with the new data. Does anyone know which is the best method for implementing auto-updating controls in windows forms applications? help greatly appreciated, regards.

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• Using ninject/autofac for a given scenario

  - by sandesh247

  I have some providers, say - <Providers> <Provider Type="Providers.IM" Name="Im"/> <Provider Type="Providers.Web" Name="Web"/> ... </Provider> Each of these providers can give me a session : <Sessions> <Session Name="GoogleIM" Provider="Im" URL="..." /> <Session Name="YahooIM" Provider="Im" URL="..." /> <Session Name="YahooWeb" Provider="Web" URL="..." /> ... </Session> Currently, I instantiate "named" sessions by looking at the provider, instantiating the type, and injecting the URL (manually). I could use a session factory, which would probably have to understand the url and return a proper session. Is there a way to handle this more elegantly/simply with ninject/autofac?

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• any code snipt or plugin(jquery) for xml string(not xml file) parse ?

  - by zjm1126

  i want to manipulate xml data simple .. thanks

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• hi when i write <h:outputText value="Login Name"/> tag in my jsp i am getting Cannot find FacesConte

  - by Sunny Mate

  hi when i write <h:outputText value="Login Name"/> tag in my jsp i am getting "Cannot find FacesContext" error , with out that tag my jsp working fine here is my JSP <%@ page language="java" import="java.util.*" pageEncoding="ISO-8859-1"%> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <%@ taglib uri="http://java.sun.com/jsf/html" prefix="h" %> <%@ taglib uri="http://java.sun.com/jsf/core" prefix="f" %> <body> Login Name <input type="text" value=""/><br> **<h:outputText value="Login Name"/>** Password<input type="password" value=""/><br> <input type="submit" value="Login"> </body> </html>

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• Trouble Shoot JavaScript Function in IE

  - by CreativeNotice

  So this function works fine in geko and webkit browsers, but not IE7. I've busted my brain trying to spot the issue. Anything stick out for you? Basic premise is you pass in a data object (in this case a response from jQuery's $.getJSON) we check for a response code, set the notification's class, append a layer and show it to the user. Then reverse the process after a time limit. function userNotice(data){ // change class based on error code returned var myClass = ''; if(data.code == 200){ myClass='success'; } else if(data.code == 400){ myClass='error'; } else{ myClass='notice'; } // create message html, add to DOM, FadeIn var myNotice = '<div id="notice" class="ajaxMsg '+myClass+'">'+data.msg+'</div>'; $("body").append(myNotice); $("#notice").fadeIn('fast'); // fadeout and remove from DOM after delay var t = setTimeout(function(){ $("#notice").fadeOut('slow',function(){ $(this).remove(); }); },5000); }

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• [C#] Onpaint events (invalidated) changing execution order after a period normal operation (runtime)

  - by Luke Mcneice

  Hi all, I have 3 data graphs that are painted via the their paint events. When I have data that I need to insert into the graph I call the controls invalidate() command. The first control's paint event actually creates a bitmap buffer for the other 2 graphs to avoid repeating a long loop. So the invalidate commands are in a specific order (1,2,3). This works well, however when the graphed data reaches the end of the graph window (PictureBox) where the data would normally start scrolling, the paint events begin firing in the wrong order (2,3,1). has anyone came across this before? why might this be happening?

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• .Net opening and closing database connections

  - by Dan

  I designed the data access portion of our framework so that every time a business object needs to interact with the database it would have to open a connection, invoke the data access layer (to execute the query), and then close the connection. Then if it needed to run in a transaction it would open the connection, begin the transaction, invoke the data access layer (to execute the query) and then commit the transaction, close the transaction, and finally close the connection. I did it this way with the mindset of open late and close early... but what if I needed to call other BO's to submit data in a single transaction? Is there a better way to handle opening and closing connections as well as working with transactions? I'm a rookie in designing application architecture so I hope I'm not doing this wrongly... any help is appreciated.

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• Dynamically setting a log4net property using common.logging

  - by Kyle LeNeau

  Does anyone know if there is an equivalent in Common.Logging (for .Net) to set properties for the log4net factory adapter? I have had great success when just using log4net by doing: <appender name="FileAppender" type="log4net.Appender.RollingFileAppender"> <file type="log4net.Util.PatternString" value="logs\Log_%property{BrokerID}.txt"/> <appendToFile value="false"/> <rollingStyle value="Size"/> <maxSizeRollBackups value="-1"/> <maximumFileSize value="50GB"/> <layout type="log4net.Layout.PatternLayout"> <conversionPattern value="%date %-5level %logger - %message%newline"/> </layout> </appender> and setting the property like:log4net.GlobalContext.Properties["BrokerID"] = 10 The file I end up with the looks like this: Log_(null).txt when using the common.logging to wire up log4net on the fly.

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• OpenSSL "Seal" in C (or via shell)

  - by chpwn

  I'm working on porting some PHP code to C, that contacts a web API. The issue I've come across is that the PHP code uses the function openssl_seal(), but I can't seem to find any way to do the same thing in C or even via openssl in a call to system(). From the PHP manual on openssl_seal(): int openssl_seal ( string $data , string &$sealed_data , array &$env_keys , array $pub_key_ids ) openssl_seal() seals (encrypts) data by using RC4 with a randomly generated secret key. The key is encrypted with each of the public keys associated with the identifiers in pub_key_ids and each encrypted key is returned in env_keys . This means that one can send sealed data to multiple recipients (provided one has obtained their public keys). Each recipient must receive both the sealed data and the envelope key that was encrypted with the recipient's public key. What would be the best way to implement this? I'd really prefer not to call out to a PHP script every time, for obvious reasons.

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• Ajax -- re-load div on success.

  - by RPM

  I am trying to accomplish a "re-load." More specifically, I need to be able to refresh a portion of my page as a result of another successful ajax call. Moreover, I load my portion of the page via ajax which obtains it's content from an ajax post. The result is my content being displayed inside my portion precisely. I need this portion of the page refreshed after a successful ajax post. Here is some of the code: /* Ajax-- this part is loaded automatically, and I need it reloaded upon success of another ajax post. This data comes from the outcome of my other ajax function. */ $('#newCo').load('click', function() { $.ajax({ url: 'index.php?dkd432k=uBus/310/Indeed', dataType: 'json', success: function(json) { if (json['newCompare']) { $('#newCo .newResults').html(json['newCompare']); } } }); }); The next portion of code is responsible for posting the data of which I obtain in this above ajax function. function ZgHiapud (ofWhich) { $.ajax({ url: 'index.php?dkd432k=uBus/310/update', type: 'post', data: 'product_id=' + product_id, dataType: 'json', success: function(json) { $('.success, .warning, .attention, .information').remove(); if (json['success']) { $('.attention').fadeIn('slow'); $('#compare_total').html(json['total']); $('html, body').animate({ scrollTop: 0 }, 'slow'); } } }); } In the end, I need to obtain the data that I send to the server immediately upon success of the second ajax call. This data that is sent via the second ajax call needs to fire the first ajax call upon success.

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• How to structure an enterprise MVC app, and where does Business Logic go?

  - by James

  I am an MVC newbie. As far as I can tell: Controller: deals with routing requests View: deals with presentation of data Model: looks a whole lot like a Data Access layer Where does the Business Logic go? Take a large enterprise application with: Several different sources of data (WCF, WebServices and ADO) tied together in a data access layer (useing multiple different DTOs). A lot business logic segmented over several dlls. What is an appropriate way for an MVC web application to sit on top of this (in terms of code and project structure)? The example I have seen where everything just goes in the Model folder don't seem like they are appropriate for very large applications. Thanks for any advice!

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• twitter bootstrap typeahead ajax example

  - by emeraldjava

  I'm trying to find a working example of the twitter bootstrap typeahead element that will make an ajax call to populate it's dropdown. I have an existing working jquery autocomplete example which defines the ajax url to and how to process the reply <script type="text/javascript"> //<![CDATA[ $(document).ready(function() { var options = { minChars:3, max:20 }; $("#runnerquery").autocomplete('./index/runnerfilter/format/html',options).result( function(event, data, formatted) { window.location = "./runner/index/id/"+data[1]; } ); .. What do i need change to convert this to the typeahead example? <script type="text/javascript"> //<![CDATA[ $(document).ready(function() { var options = { source:'/index/runnerfilter/format/html', items:5 }; $("#runnerquery").typeahead(options).result( function(event, data, formatted) { window.location = "./runner/index/id/"+data[1]; } ); .. I'm going to wait for the 'Add remote sources support for typeahead' issue to be resolved.

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• Configure Hibernate validation for bean

  - by sergionni

  Hi. I need to perform validation based on SQL query result. Query is defined as annotation - as @NamedQuery in my entity bean. According to Hibernate documentation(doc), there is possibility to validate bean on following operations: pre-update pre-insert pre-delete looks like: <hibernate-configuration> <session-factory> ... <event type="pre-update"> <listener class="org.hibernate.cfg.beanvalidation.BeanValidationEventListener"/> </event> <event type="pre-insert"> <listener class="org.hibernate.cfg.beanvalidation.BeanValidationEventListener"/> </event> <event type="pre-delete"> <listener class="org.hibernate.cfg.beanvalidation.BeanValidationEventListener"/> </event> </hibernate-configuration> The question is how to connect my bean with the validation configuration, described above.

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• Sql-server Database query help

  - by menacheb

  Hi, I have a Database (Sql-server) with table named 'ProcessData' and columns named 'Process_Name' (Data Type: nvarchar(50)), 'Start_At' (DataType: DateTime) and 'End_At' (Data Type: DateTime). I need to konw for each 'Time-Interval' (let's say 1 second) how many processes (Process_Name = PN) was open (after or equal to the 'Start_at' column and before or equal to the 'End_At' column) during this time (It can be a few rows with the same data). Does anyone know how to make this query? Many thanks,

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• Is using the keyword var bad in C# 2.0?

  - by Patrick

  I read an article about using C# 3 features in C# 2 where you can for instance type var x = 2; and even if the project is a 2.0 project, the Visual Studio 2008 compiler picks it up and generates the same code as it would if you type int x = 2. But what I don't get is, should you not do this in some cases? I always thought that the var keyword didn't arrive until C# 3.. If the compiler generates the same code and I can type C# 3 code and C# 2 code exactly the same, what is the differance really, because the CLI is the same, right? Quote from the link above Behind the scenes, the compiler generate regular .NET 2.0 code. Is there any difference between .NET 2.0 code and .NET 3 code?

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• How do I check if a user is a fan of my facebook page on my website?

  - by Tony

  I want to check if my users are fans of my facebook page. I think something like this should do it: <script type="text/javascript" src="http://static.ak.connect.facebook.com/js/api_lib/v0.4/FeatureLoader.js.php/en_US"></script> <script type="text/javascript">FB.init("my api key","xd_receiver.htm");</script> <script type="text/javascript"> //<![CDATA[ FB_RequireFeatures(["Api"], function(){ var api = FB.Facebook.apiClient; api.pages_isFan(PAGE_ID,gigyaUser.FACEBOOK_USER_ID,function(response){ alert(response); }); }); //]]> </script> However, for some reason I keep getting null even though the user is in fact a fan of the page. Am I missing something?

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