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• Low Latency Serial Communications In .Net

  - by bvillersjr

  I have been researching various third party libraries and approaches to low latency serial communications in .Net. I've read enough that I have now come full circle and know as little as I did when I started due to the variety of conflicting opinions. For example, the functionality in the Framework was ruled out due to some convincing articles stating: "that the Microsoft provided solution has not been stable across framework versions and is lacking in functionality." I have found articles bashing many of the older COM based libraries. I have found articles bashing the idea of a low latency .Net app as a whole due to garbage collection. I have also read articles demonstrating how P/Invoking Windows API functionality for the purpose of low latency communication is unacceptable. THIS RULES OUT JUST ABOUT ANY APPROACH I CAN THINK OF! I would really appreciate some words from those with been there / done that experience. Ideally, I could locate a solid library / partner and not have to build the communications library myself. I have the following simple objectives: Sustained low latency serial communication in C# / VB.Net 32/64 bit Well documented (if the solution is 3rd party) Relatively unimpacted (communication and latency wise) by garbage collection . Flexible (I have no idea what I will have to interface with in the future!) The only requirement that I have for certain is that I need to be able to interface with many different industrial devices such as RS485 based linear actuators, serial / microcontroller based gauges, and ModBus (also RS485) devices. Any comments, ideas, thoughts or links to articles that may iron out my confusion are much appreciated!

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• attachment_fu and RMagick

  - by trobrock

  After finally getting RMagick installed on my Mac I have set up attachment_fu according to the tutorial here: http://clarkware.com/cgi/blosxom/2007/02/24#FileUploadFu&gt when I try and upload a file via the upload form I get around 80 messages like these: /Library/Ruby/Gems/1.8/gems/rmagick-2.13.1/lib/RMagick.rb:44: warning: already initialized constant PercentGeometry /Library/Ruby/Gems/1.8/gems/rmagick-2.13.1/lib/RMagick.rb:45: warning: already initialized constant AspectGeometry /Library/Ruby/Gems/1.8/gems/rmagick-2.13.1/lib/RMagick.rb:46: warning: already initialized constant LessGeometry /Library/Ruby/Gems/1.8/gems/rmagick-2.13.1/lib/RMagick.rb:47: warning: already initialized constant GreaterGeometry I did some searching and found that this problem can arise when you require RMagick twice in an application using different casing for the require statement: http://work.rowanhick.com/2007/12/19/require-rmagick-and-case-sensitivity/ I am not requiring it myself, but I was thinking maybe with the config.gem "rmagick" line in my environment.rb file rails might be requiring it. After the form submits it gives me a validation error of: Content type is not included in the list I have checked the source for attachement_fu and found the image/png in the list of content types so I don't believe that is the proper error message: http://github.com/technoweenie/attachment_fu/blob/master/lib/technoweenie/attachment_fu.rb Does anyone have any ideas on how I can get this to work?

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• C# Client to Consume Google App Engine RESTful Webservice (rpc XML)

  - by Ngu Soon Hui

  I think I hit a problem when using C# client to consume Google App Engine Webservice. The Google App Engine code I use is here. This is how the python script on server would look like: from google.appengine.ext import webapp from google.appengine.ext.webapp.util import run_wsgi_app import logging from StringIO import StringIO import traceback import xmlrpclib from xmlrpcserver import XmlRpcServer class Application: def __init__(self): pass def getName(self,meta): return 'example' class XMLRpcHandler(webapp.RequestHandler): rpcserver = None def __init__(self): self.rpcserver = XmlRpcServer() app = Application() self.rpcserver.register_class('app',app) def post(self): request = StringIO(self.request.body) request.seek(0) response = StringIO() try: self.rpcserver.execute(request, response, None) except Exception, e: logging.error('Error executing: '+str(e)) for line in traceback.format_exc().split('\n'): logging.error(line) finally: response.seek(0) rstr = response.read() self.response.headers['Content-type'] = 'text/xml' self.response.headers['Content-length'] = "%d"%len(rstr) self.response.out.write(rstr) application = webapp.WSGIApplication( [('/xmlrpc/', XMLRpcHandler)], debug=True) def main(): run_wsgi_app(application) if __name__ == "__main__": main() The client side ( in Python) is this: import xmlrpclib s = xmlrpclib.Server('http://localhost:8080/xmlrpc/') print s.app.getName() I have no problem in using Python client to retrieve values from Google App Engine, but I do have difficulties in using a C# client to retrieve the values. The error I got was 404 method not found when I am trying to GetResponse from the web request. This is my code var request = (HttpWebRequest)WebRequest.Create("http://localhost:8080/xmlrpc/app"); request.Method = "GET"; request.ContentLength = 0; request.ContentType = "text/xml"; using (HttpWebResponse response = request.GetResponse() as HttpWebResponse) //404 method not found error here. { } I think it must be that the url is wrong, but I don't know how to get it right. Any idea?

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• Mirth is Not Picking Up Updated JAR File?

  - by ashes999

  I have some Mirth code (javascript) that's consuming one of my Java classes (let's call it SimpleClass). It seems that Mirth is not picking up my changes to my class. SimpleClass used to look something like this: public class Simpleclass { public SimpleClass(String one) { // do something with one } } Now it looks like: public class Simpleclass { public SimpleClass(String one, String two) { // store one and two } public void Execute() { // do something with one and two } } When I try and call SimpleClass with two strings, I get the error "Java constructor for SimpleClass with arguments string, string not found." When I try to run Execute, I get an error similar to "TypeError: method Execute not found." Perplexingly, I can still call SimpleClass("one string") to call the one-string constructor (which is now nowhere to be seen in the code). To get my code to work, I build a JAR file using ant, and deploy it to \\lib\custom. I have tried: Copying the new JAR and restarting Mirth while it's live Copying the new JAR after stopping Mirth, then starting Mirth Looking for other copies of my JAR or Mirth installations (there are none) Unzipping and reverse-engineering the JAR (it has the two-constructor code) Hashing the JAR (it matches what I'm building in ant) Restarting my computer (hey, you never know) I'm at a loss. I'm not sure why I'm not seeing the latest code. My channel has very simple Javascript: var sp = new Packages.com.hs.channel.scarborough.ScarboroughParser("one", "two"); I know it's not a configuration error of any kind, since this used to work (and does still work, albeit with the old code -- single-parameter constructor).

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• How to use Svn Version Task to set the Version of a vb project

  - by SchlaWiener

  I have a Visual Studio 2008 Solution where the main output exe is a VB.Net Winforms exe which has several VB.Net and C# dll's linked from the same solution. The whole solution is under version control with subversion. Now I want to automagically update by generated files with the current svn revision number. For this purpose I found this neat project: http://svnversiontasks.codeplex.com/ You also need the MSBuild.Communuity.Tasks for this to work. There was a msbuild example on how to update the rev number for every single project in your solution which I use: <Import Project="$(MSBuildExtensionsPath)\SvnTools.Targets\SvnTools.Tasks.VersionManagement.Tasks" /> <Target Name="build"> <CreateItem Include="../**/AssemblyInfo.vb;../**/AssemblyInfo.cs;../**/Properties/AssemblyInfo.cs"> <Output TaskParameter="Include" ItemName="AssemblyInfoFiles" /> </CreateItem> <CreateItem Include="../**/*.vdproj;*.vdproj"> <Output TaskParameter="Include" ItemName="DeploymentProjectFiles" /> </CreateItem> <UpdateVersion AssemblyInfoFiles="@(AssemblyInfoFiles)" DeploymentProjectFiles="@(DeploymentProjectFiles)" Format="yyyy.mm.dd.rev" /> <Exec Command="&quot;$(VS90COMNTOOLS)..\IDE\devenv&quot; ..\MyApp.sln /build" /> <RevertVersionChange AssemblyInfoFiles="@(AssemblyInfoFiles)" DeploymentProjectFiles="@(DeploymentProjectFiles)" /> </Target> I modified the original file to also include the AssemblyInfo.vb file and saved it as a msbuild.proj file. However if I execute msbuild from the console I see that the C# projects are updated (I can also confirm that from the properties of the output dll but my vb project remains unchanged: Reverting version number change: ../App1\AssemblyInfo.vb Updating version number (to rev 0) for file: ../App1\AssemblyInfo.vb D:\Source\MyApp\MyAppDeploy\MyAppDeploy.csproj : warning : Version attribute not found, file not updated. Reverting version number change: ../App2\Properties\AssemblyInfo.cs Updating version number (to rev 0) for file: ../App2\Properties\AssemblyInfo.cs Successfully updated file. Maybe the task does not support VB.Net. But maybe someone has a solution for this...

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• Namespaces combined with TFS / Source Control explanation

  - by Christian

  As an ISV company we slowly run into the "structure your code"-issue. We mainly develop using Visual Studio 2008 and 2010 RC. Languages c# and vb.net. We have our own Team Foundation Server and of course we use Source Control. When we started developing based on the .NET Framework, we also begun using Namespaces in a primitive way. With the time we 'became more mature', i mean we learned to use the namespaces and we structured the code more and more, but only in the solution scope. Now we have about 100 different projects and solutions in our Source Safe. We realized that many of our own classes are coded very redundant, i mean, a Write2Log, GetExtensionFromFilename or similar Function can be found between one and 20 times in all these projects and solutions. So my idea is: Creating one single kind of root folder in Source Control and start an own namespace-hierarchy-structure below this root, let's name it CompanyName. A Write2Log class would then be found in CompanyName.System.Logging. Whenever we create a new solution or project and we need a log function, we will 'namespace' that solution and place it accordingly somewhere below the CompanyName root folder. To have the logging functionality we then import (add) the existing project to the solution. Those 20+ projects/solutions with the write2log class can then be maintained in one single place. To my questions: - is that a good idea, the philosophy of namespaces and source control? - There must be a good book explaining the Namespaces combined with Source Control, yes? any hints/directions/tips? - how do you manage your 50+ projects?

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• ASP Classic, SQL 2008, XML Output, and DSN vs DSN-Less Produces Chinese Letters

  - by RoLYroLLs

  I've been having a problem for the past month and can't seem to figure out what is wrong. Here's the setup and a little background. Background: I have a web-host who was running my website on Windows Server 2003 and SQL Server 2000. One of my webpages returned a result set from a stored procedure from the SQL server as xml. Below is the code: Stored Procedure: select top 10 1 as tag , null as parent , column1 as [item!1!column1!element] , column2 as [item!1!column2!element] from table1 for XML EXPLICIT ASP Page: index.asp Call OpenConn Set cmd = Server.CreateObject("ADODB.Command") With cmd .ActiveConnection = dbc .CommandText = "name of proc" .CommandType = adCmdStoredProc .Parameters.Append .CreateParameter("@RetVal", adInteger, adParamReturnValue, 4) .Parameters.Append .CreateParameter("@Level", adInteger, adParamInput, 4, Level) End With Set rsItems = Server.CreateObject("ADODB.Recordset") With rsItems .CursorLocation = adUseClient .CursorType = adOpenStatic .LockType = adLockBatchOptimistic Set .Source = cmd .Open Set .ActiveConnection = Nothing End With If NOT rsItems.BOF AND NOT rsItems.EOF Then OutputXMLQueryResults rsItems,"items" End If Set rsItems = Nothing Set cmd = Nothing Call CloseConn Sub OpenConn() strConn = "Provider=SQLOLEDB;Data Source=[hidden];User Id=[hidden];Password=[hidden];Initial Catalog=[hidden];" Set dbc = Server.CreateObject("ADODB.Connection") dbc.open strConn End Sub Sub CloseConn() If IsObject(dbc) Then If dbc.State = adStateOpen Then dbc.Close End If Set dbc = Nothing End If End Sub Sub OutputXMLQueryResults(RS,RootElementName) Response.Clear Response.ContentType = "text/xml" Response.Codepage = 65001 Response.Charset = "utf-8" Response.Write "" Response.Write "" While Not RS.EOF Response.Write RS(0).Value RS.MoveNext WEnd Response.Write "" Response.End End Sub Present: All was working great, until my host upgraded to Windows Server 2008 and SQL Server 2008. All of the sudden I was getting results like this: From Browser: From View Source: However, I found that if I use a DSN connection strConn = "DSN=[my DSN Name];User Id=[hidden];Password=[hidden];Initial Catalog=[hidden];" it works perfectly fine! My current host is not going to support DSN any longer, but that's out of scope for this issue. Someone told me to use an ADO.Stream object instead of a Recordset object, but I'm unsure how to implement that. Question: Has anyone run into this and found a way to fix it? What about that ADO.Stream object, can someone help me with a sample that would fit my code?

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• video streaming over http in blackberry

  - by ysnky

  hi all, while i was searching video player over http, i found the article which is located at this url; http://www.blackberry.com/knowledgecenterpublic/livelink.exe/fetch/2000/348583/800332/1089414/Stream ing_media_-_Start_to_finish.html?nodeid=2456737&ve rnum=0 i can run by adding ";deviceside=true" at the end of url. it works fine in the jde4.5 simulator. it gets 3gp videos from my local server. i tested with 580kb files and works fine. but when i get the same file from my server (not local, real server) i have problems with big files (e.g 580 kb). it plays 180kb files (but sometimes it does not play this file either) but not plays 580kb file. and also i deployed my application to my 9000 device it sometimes plays small file (180kb) but never plays big file (580kb). why it plays if it is on my local file, not play in real world? i ve stucked for days. hope you help me. and also the code at the url given below is not work, the only code i ve found is the above. blackberry.com/knowledgecenterpublic/livelink.exe/fetch/2000/348583/800332/1089414/How_To _-_Play_video_within_a_BlackBerry_smartphone_appli cation.html?nodeid=1383173&vernum=0 btw, there is no method such as resize(long param) of CircularByteBuffer class. so i comment relavent line (buffer.resize(buffer.getSize() + (buffer.getSize() * percent / 100)); as shown below. public void increaseBufferCapacity(int percent) { if(percent < 0){ log(0, "FAILED! SP.setBufferCapacity() - " + percent); throw new IllegalArgumentException("Increase factor must be positive.."); } synchronized(readLock){ synchronized(connectionLock){ synchronized(userSeekLock){ synchronized(mediaIStream){ log(0, "SP.setBufferCapacity() - " + percent); //buffer.resize(buffer.getSize() + (buffer.getSize() * percent / 100)); this.bufferCapacity = buffer.getSize(); } } } } } thanks in advance.

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• How do I detect if there is already a similar document stored in Lucene index.

  - by Jenea

  Hi. I need to exclude duplicates in my database. The problem is that duplicates are not considered exact match but rather similar documents. For this purpose I decided to use FuzzyQuery like follows: var fuzzyQuery = new global::Lucene.Net.Search.FuzzyQuery( new Term("text", queryText), 0.8f, 0); hits = _searcher.Search(query); The idea was to set the minimal similarity to 0.8 (that I think is high enough) so only similar documents will be found excluding those that are not sufficiently similar. To test this code I decided to see if it finds already existing document. To the variable queryText was assigned a value that is stored in the index. The code from above found nothing, in other words it doesn't detect even exact match. Index was build by this code: doc.Add(new global::Lucene.Net.Documents.Field( "text", text, global::Lucene.Net.Documents.Field.Store.YES, global::Lucene.Net.Documents.Field.Index.TOKENIZED, global::Lucene.Net.Documents.Field.TermVector.WITH_POSITIONS_OFFSETS)); I followed recomendations from bellow and the results are: TermQuery doesn't return any result. Query contructed with var _analyzer = new RussianAnalyzer(); var parser = new global::Lucene.Net.QueryParsers .QueryParser("text", _analyzer); var query = parser.Parse(queryText); var _searcher = new IndexSearcher (Settings.General.Default.LuceneIndexDirectoryPath); var hits = _searcher.Search(query); Returns several results with the maximum score the document that has exact match and other several documents that have similar content.

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• Replacing specific HTML tags using Regex

  - by matthewpe

  Alright, an easy one for you guys. We are using ActiveReport's RichTextBox to display some random bits of HTML code. The HTML tags supported by ActiveReport can be found here : http://www.datadynamics.com/Help/ARNET3/ar3conSupportedHtmlTagsInRichText.html An example of what I want to do is replace any match of <div style="text-align:*</div> by <p style=\"text-align:*</p> in order to use a supported tag for text-alignment. I have found the following regex expression to find the correct match in my html input: <div style=\"text-align:(.*?)</div> However, I can't find a way to keep the previous text contained in the tags after my replacement. Any clue? Is it me or Regex are generally a PITA? :) private static readonly IDictionary<string, string> _replaceMap = new Dictionary<string, string> { {"<div style=\"text-align:(.*?)</div>", "<p style=\"text-align:(.*?)</p>"} }; public static string FormatHtml(string html) { foreach(var pair in _replaceMap) { html = Regex.Replace(html, pair.Key, pair.Value); } return html; } Thanks!

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• SQL Server 2005 Reporting Services and the Report Viewer

  - by Kendra

  I am having an issue embedding my report into an aspx page. Here's my setup: 1 Server running SQL Server 2005 and SQL Server 2005 Reporting Services 1 Workstation running XP and VS 2005 The server is not on a domain. Reporting Services is a default installation. I have one report called TestMe in a folder called TestReports using a shared datasource. If I view the report in Report Manager, it renders fine. If I view the report using the http ://myserver/reportserver url it renders fine. If I view the report using the http ://myserver/reportserver?/TestReports/TestMe it renders fine. If I try to view the report using http ://myserver/reportserver/TestReports/TestMe, it just goes to the folder navigation page of the home directory. My web application is impersonating somebody specific to get around the server not being on a domain. When I call the report from the report viewer using http ://myserver/reportserver as the server and /TestReports/TestMe as the path I get this error: For security reasons DTD is prohibited in this XML document. To enable DTD processing set the ProhibitDtd property on XmlReaderSettings to false and pass the settings into XmlReader.Create method. When I change the server to http ://myserver/reportserver? I get this error when I run the report: Client found response content type of '', but expected 'text/xml'. The request failed with an empty response. I have been searching for a while and haven't found anything that fixes my issue. Please let me know if there is more information needed. Thanks in advance, Kendra

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• Finding distance to the closest point in a point cloud on an uniform grid

  - by erik

  I have a 3D grid of size AxBxC with equal distance, d, between the points in the grid. Given a number of points, what is the best way of finding the distance to the closest point for each grid point (Every grid point should contain the distance to the closest point in the point cloud) given the assumptions below? Assume that A, B and C are quite big in relation to d, giving a grid of maybe 500x500x500 and that there will be around 1 million points. Also assume that if the distance to the nearest point exceds a distance of D, we do not care about the nearest point distance, and it can safely be set to some large number (D is maybe 2 to 10 times d) Since there will be a great number of grid points and points to search from, a simple exhaustive: for each grid point: for each point: if distance between points < minDistance: minDistance = distance between points is not a good alternative. I was thinking of doing something along the lines of: create a container of size A*B*C where each element holds a container of points for each point: define indexX = round((point position x - grid min position x)/d) // same for y and z add the point to the correct index of the container for each grid point: search the container of that grid point and find the closest point if no points in container and D > 0.5d: search the 26 container indices nearest to the grid point for a closest point .. continue with next layer until a point is found or the distance to that layer is greater than D Basically: put the points in buckets and do a radial search outwards until a points is found for each grid point. Is this a good way of solving the problem, or are there better/faster ways? A solution which is good for parallelisation is preferred.

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• Correct escaping of delimited identifers in SQL Server without using QUOTENAME

  - by Ross Bradbury

  Is there anything else that the code must do to sanitize identifiers (table, view, column) other than to wrap them in double quotation marks and "double up" and double quotation marks present in the identifier name? References would be appreciated. I have inherited a code base that has a custom object-relational mapping (ORM) system. SQL cannot be written in the application but the ORM must still eventually generate the SQL to send to the SQL Server. All identifiers are quoted with double quotation marks. string QuoteName(string identifier) { return "\" + identifier.Replace("\"", "\"\"") + "\""; } If I were building this dynamic SQL in SQL, I would use the built-in SQL Server QUOTENAME function: declare @identifier nvarchar(128); set @identifier = N'Client"; DROP TABLE [dbo].Client; --'; declare @delimitedIdentifier nvarchar(258); set @delimitedIdentifier = QUOTENAME(@identifier, '"'); print @delimitedIdentifier; -- "Client""; DROP TABLE [dbo].Client; --" I have not found any definitive documentation about how to escape quoted identifiers in SQL Server. I have found Delimited Identifiers (Database Engine) and I also saw this stackoverflow question about sanitizing. If it were to have to call the QUOTENAME function just to quote the identifiers that is a lot of traffic to SQL Server that should not be needed. The ORM seems to be pretty well thought out with regards to SQL Injection. It is in C# and predates the nHibernate port and Entity Framework etc. All user input is sent using ADO.NET SqlParameter objects, it is just the identifier names that I am concerned about in this question. This needs to work on SQL Server 2005 and 2008.

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• COM: How to handle a specific exception?

  - by Ian Boyd

  i'm talking to a COM object (Microsoft ADO Recordset object). In a certain case the recordset will return a failed (i.e. negative) HRESULT, with the message: Item cannot be found in the collection corresponding to the requested name or ordinal i know what this error message means, know why it happened, and i how to fix it. But i know these things because i read the message, which fortunately was in a language i understand. Now i would like to handle this exception specially. The COM object threw an HRESULT of 0x800A0CC1 In an ideal world Microsoft would have documented what errors can be returned when i try to access: records.Fields.Items( index ) with an invalid index. But they do not; they most they say is that an error can occur, i.e.: If Item cannot find an object in the collection corresponding to the Index argument, an error occurs. Given that the returned error code is not documented, is it correct to handle a specific return code of `0x800A0CC1' when i'm trying to trap the exception: Item cannot be found in the collection corresponding to the requested name or ordinal ? Since Microsoft didn't document the error code, they technically change it in the future.

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• Simple perl program failing to execute

  - by yves Baumes

  Here is a sample that fails: #!/usr/bin/perl -w # client.pl #---------------- use strict; use Socket; # initialize host and port my $host = shift || 'localhost'; my $port = shift || 55555; my $server = "10.126.142.22"; # create the socket, connect to the port socket(SOCKET,PF_INET,SOCK_STREAM,(getprotobyname('tcp'))[2]) or die "Can't create a socket $!\n"; connect( SOCKET, pack( 'Sn4x8', AF_INET, $port, $server )) or die "Can't connect to port $port! \n"; my $line; while ($line = <SOCKET>) { print "$line\n"; } close SOCKET or die "close: $!"; with the error: Argument "10.126.142.22" isn't numeric in pack at D:\send.pl line 16. Can't connect to port 55555! I am using this version of Perl: This is perl, v5.10.1 built for MSWin32-x86-multi-thread (with 2 registered patches, see perl -V for more detail) Copyright 1987-2009, Larry Wall Binary build 1006 [291086] provided by ActiveState http://www.ActiveState.com Built Aug 24 2009 13:48:26 Perl may be copied only under the terms of either the Artistic License or the GNU General Public License, which may be found in the Perl 5 source kit. Complete documentation for Perl, including FAQ lists, should be found on this system using "man perl" or "perldoc perl". If you have access to the Internet, point your browser at http://www.perl.org/, the Perl Home Page. While I am running the netcat command on the server side. Telnet does work.

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• How do I get the Silverlight Add-On for Visual Studio 2010 and some example code?

  - by xarzu

  How do I get the Silverlight Add-On for Visual Studio 2010? And where can I find lots of example code? When the interent and html was new, one could find examples of how to build a website on a few trusted web sites. The same web sites might not be the best choice for looking for examples for Silverlight, I guess. What are the best web sites where you can look at examples -- and most importantly -- look at the source code of some examples of Silverlight? Back when MFC existed as a option that programmers might use to develop windows applications, a coder could look at a huge list of sample code and step through that code to find something that somewhat did what he was looking for and use that example code to build his own app. Is there anything like that for Silverlight? I have found the http://gallery.expression.microsoft.com/ Expression Blend Gallery and I have found the http://www.silverlight.net/community/samples/silverlight-samples/ Silverlight dot net community samples. I guess that will keep me busy for a while. Are there other sites? There are video instructions on MSDN's Channel9: http://channel9.msdn.com/tags/curso-silverlight-4/ Are there any videos in English? The video instructions look very good. Where is the links to the English versions? I was suggested this site for learning silverlight: http://channel9.msdn.com/learn/courses/Silverlight4/ This online documentation mentions "The Silverlight 4 Tools for Visual Studio 2010" which "is an add-on for Visual Studio 2010 that provides tooling for Microsoft Silverlight 4 and WCF RIA Services. It can be installed on top of either Visual Studio 2010 or Visual Web Developer 2010 Express" where can I find this? Is it shipped with Visual Studio 2010?

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• Audio in xCode4.x is producing console warnings

  - by David DelMonte

  While the app works, I am seeing pages of console log warnings when I'm running my app on the simulator. Even Apple's "LoadPresetDemo" sample app produces the same warning messages. I don't want to reproduce them all here (about 500 lines), but here are few. I would appreciate any insight into what's going on... Expected in: /Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator5.0.sdk/System/Library/Frameworks/CoreFoundation.framework/CoreFoundation in /System/Library/Frameworks/Security.framework/Versions/A/Security 2011-11-30 17:43:00.098 appname[4175:16c03] Error loading /System/Library/Extensions/AppleHDA.kext/Contents/PlugIns/AppleHDAHALPlugIn.bundle/Contents/MacOS/AppleHDAHALPlugIn: dlopen(/System/Library/Extensions/AppleHDA.kext/Contents/PlugIns/AppleHDAHALPlugIn.bundle/Contents/MacOS/AppleHDAHALPlugIn, 262): Symbol not found: ___CFObjCIsCollectable Referenced from: /System/Library/Frameworks/Security.framework/Versions/A/Security ... Referenced from: /System/Library/Frameworks/Security.framework/Versions/A/Security Expected in: /Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator5.0.sdk/System/Library/Frameworks/CoreFoundation.framework/CoreFoundation in /System/Library/Frameworks/Security.framework/Versions/A/Security 2011-11-30 17:43:00.245 appname[4175:16c03] Cannot find function pointer NewPlugIn for factory C5A4CE5B-0BB8-11D8-9D75-0003939615B6 in CFBundle/CFPlugIn 0x7b6b0780 (bundle, not loaded) 2011-11-30 17:43:00.255 appname[4175:16c03] Error loading /Library/Audio/Plug-Ins/HAL/iSightAudio.plugin/Contents/MacOS/iSightAudio: dlopen(/Library/Audio/Plug-Ins/HAL/iSightAudio.plugin/Contents/MacOS/iSightAudio, 262): Symbol not found: ___CFObjCIsCollectable

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• Windows Forms Event Log

  - by blu

  I am writing to the event log from my Windows Forms application running on Windows 7 and am getting this message in the event log: The description for Event ID X from source Application cannot be found. Either the component that raises this event is not installed on your local computer or the installation is corrupted. You can install or repair the component on the local computer. If the event originated on another computer, the display information had to be saved with the event. The following information was included with the event: Exception Details the message resource is present but the message is not found in the string/message table My logging code is: public void Log(Exception exc) { EventLog.WriteEntry( "Application", exc.ToString(), EventLogEntryType.Error, 100); } My logging on Windows Forms is usually to a DB, but in this case decided to use the event log. I usually use the event log in ASP.NET applications, but those are on XP Pro locally and Windows Server 2003 on the web boxes. Is this a Windows 7 thing or a Windows Forms thing, and what should I do to fix this? Thanks.

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• SharpPcap issue

  - by Eyla

  This is my first time to use SharpPcap library. I created new project with VC# 2008 and I added SharpPcap as a reference to my project. I post a sample code to get interface of my pc but I'm getting this error: Error 1 The type or namespace name 'PcapDeviceList' could not be found (are you missing a using directive or an assembly reference?) C:\Users\Ali\Documents\Visual Studio 2008\Projects\Pcap\Pcap\Form1.cs 28 13 Pcap please advice to solve this problem. here is my code: using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Windows.Forms; using SharpPcap; using SharpPcap.Packets; using SharpPcap.Protocols; using SharpPcap.Util; namespace Pcap { public partial class Form1 : Form { public Form1() { InitializeComponent(); } private void button1_Click(object sender, EventArgs e) { /* Retrieve the device list */ PcapDeviceList devices = SharpPcap.GetAllDevices(); /*If no device exists, print error */ if (devices.Count < 1) { Console.WriteLine("No device found on this machine"); return; } int i = 0; /* Scan the list printing every entry */ foreach (PcapDevice dev in devices) { /* Description */ label1.Text = "{0}) {1}" + i + dev.PcapDescription +"\n"+ /* Name */ "\tName:\t{0}" + dev.PcapName+"\n"+ /* IP Address */ "\tIP Address: \t\t{0}"+ dev.PcapIpAddress+"\n"+ /* Is Loopback */ "\tLoopback: \t\t{0}"+ dev.PcapLoopback; i++; } } } }

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• RegularExpression Validator doesn't display error message.

  - by Rudi Ramey

  I have a regular expression validation control initialized to validate a textbox control. I want users to be able to enter U.S. Currency values ($12,115.85 or 1500.22 etc.). I found a regular expression off of regexlib website that does the trick. The validation control seems to be working except for one crucial thing. If invalid data is entered, the validation text dispalys (a red "*" next to the textbox), but the page will still submit and the error message won't pop up... I thought that the error message is supposed to display and the page won't submit if the validation control detects invalid data. Isn't this automatic with ASP .NET? I have searched extensively on how to create validation controls, but haven't found anything different than what I am already doing. Can anyone tell me what I am doing wrong here? <asp:TextBox ID="txtActualCost" runat="server" Width="120px" CausesValidation="true"></asp:TextBox> <asp:RegularExpressionValidator ID="regExValActualCost" ControlToValidate="txtActualCost" Text="*" ValidationExpression="^\$?(\d{1,3}(\,\d{3})*|(\d+))(\.\d{2})?$" ErrorMessage="Please enter a valid currency value for 'Actual Cost'" Display="Dynamic" EnableClientScript="true" runat="server" />

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• How do I extract a postcode from one column in SSIS using regular expression

  - by Aphillippe

  I'm trying to use a custom regex clean transformation (information found here ) to extract a post code from a mixed address column (Address3) and move it to a new column (Post Code) Example of incoming data: Address3: "London W12 9LZ" Incoming data could be any combination of place names with a post code at the start, middle or end (or not at all). Desired outcome: Address3: "London" Post Code: "W12 9LZ" Essentially, in plain english, "move (not copy) any post code found from address3 into Post Code". My regex skills aren't brilliant but I've managed to get as far as extracting the post code and getting it into its own column using the following regex, matching from Address3 and replacing into Post Code: Match Expression: (?<stringOUT>([A-PR-UWYZa-pr-uwyz]([0-9]{1,2}|([A-HK-Ya-hk-y][0-9]|[A-HK-Ya-hk-y][0-9] ([0-9]|[ABEHMNPRV-Yabehmnprv-y]))|[0-9][A-HJKS-UWa-hjks-uw])\ {0,1}[0-9][ABD-HJLNP-UW-Zabd-hjlnp-uw-z]{2}|([Gg][Ii][Rr]\ 0[Aa][Aa])|([Ss][Aa][Nn]\ {0,1}[Tt][Aa]1)|([Bb][Ff][Pp][Oo]\ {0,1}([Cc]\/[Oo]\ )?[0-9]{1,4})|(([Aa][Ss][Cc][Nn]|[Bb][Bb][Nn][Dd]|[BFSbfs][Ii][Qq][Qq]|[Pp][Cc][Rr][Nn]|[Ss][Tt][Hh][Ll]|[Tt][Dd][Cc][Uu]|[Tt][Kk][Cc][Aa])\ {0,1}1[Zz][Zz]))) Replace Expression: ${stringOUT} So this leaves me with: Address3: "London W12 9LZ" Post Code: "W12 9LZ" My next thought is to keep the above match/replace, then add another to match anything that doesn't match the above regex. I think it might be a negative lookahead but I can't seem to make it work. I'm using SSIS 2008 R2 and I think the regex clean transformation uses .net regex implementation. Thanks.

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• Info on type family instances

  - by yairchu

  Intro: While checking out snoyman's "persistent" library I found myself wanting ghci's (or another tool) assistance in figuring out stuff. ghci's :info doesn't seem to work as nicely with type-families and data-families as it does with "plain" types: > :info Maybe data Maybe a = Nothing | Just a -- Defined in Data.Maybe ... > :info Persist.Key Potato -- "Key Potato" defined in example below data family Persist.Key val -- Defined in Database.Persist ... (no info on the structure/identity of the actual instance) One can always look for the instance in the source code, but sometimes it could be hard to find it and it may be hidden in template-haskell generated code etc. Code example: {-# LANGUAGE FlexibleInstances, GeneralizedNewtypeDeriving, MultiParamTypeClasses, TypeFamilies, QuasiQuotes #-} import qualified Database.Persist as Persist import Database.Persist.Sqlite as PSqlite PSqlite.persistSqlite [$persist| Potato name String isTasty Bool luckyNumber Int UniqueId name |] What's going on in the code example above is that Template-Haskell is generating code for us here. All the extensions above except for QuasiQuotes are required because the generated code uses them. I found out what Persist.Key Potato is by doing: -- test.hs: test = PSqlite.persistSqlite [$persist| ... -- ghci: > :l test.hs > import Language.Haskell.TH > import Data.List > runQ test >>= putStrLn . unlines . filter (isInfixOf "Key Potato") . lines . pprint where newtype Database.Persist.Key Potato = PotatoId Int64 type PotatoId = Database.Persist.Key Potato Question: Is there an easier way to get information on instances of type families and data families, using ghci or any other tool?

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• .NET XML serialization

  - by ShdNx

  I would like to serialize and deserialize mixed data into XML. After some searches I found out that there were two ways of doing it: System.Runtime.Serialization.Formatters.Soap.SoapFormatter and System.Xml.Serialization.XmlSerializer. However, neither turned out to match my requirements, since: SoapFormatter doesn't support serialization of generic types XmlSerializer refuses to serialize types that implement IDictionary, not to mention that it's far less easy-to-use than "normal" serialization (e.g. see this SO question) I'm wondering if there exists an implementation that doesn't have these limitations? I have found attempts (for example CustomXmlSerializer and YAXLib as suggested in a related SO question), but they don't seem to work either. I was thinking about writing such serializer myself (though it certainly doesn't seem to be a very easy task), but then I find myself limited by the CLR, as I cannot create object instances of types that won't have a paramaterless constructor, even if I'm using reflection. I recall having read somewhere that implementations in System.Runtime.Serialization somehow bypass the normal object creation mechanism when deserializing objects, though I'm not sure. Any hints of how could this be done? Could somebody please point me to the right direction with this?

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• question about InnoDB deadlock in MySQL?

  - by WilliamLou

  I found this kind of interesting problem in MySQL InnoDB engine, could anyone explain why the engine always claim it's a deadlock. First, I created a table with a single row, single column: CREATE TABLE `SeqNum` (`current_seq_num` bigint(30) NOT NULL default '0', PRIMARY KEY (`current_seq_num`) ) ENGINE=InnoDB DEFAULT CHARSET=utf8 | Now, I have two MySQL connector threads, In thread1: mysql> begin; Query OK, 0 rows affected (0.00 sec) mysql> select `current_seq_num` into @curr_seq FROM SeqNum FOR UPDATE; Query OK, 1 row affected (0.00 sec) Now, in thread2, I did the exactly same: mysql> begin; Query OK, 0 rows affected (0.00 sec) mysql> select `current_seq_num` into @curr_seq FROM SeqNum FOR UPDATE; before the default innodb_lock_wait_timeout, the thread2 just wait for thread1 to release its exclusive lock on the table, and it's normal. However, in thread1, if I input the following update query: mysql> update SeqNum set `current_seq_num` = 8; ERROR 1213 (40001): Deadlock found when trying to get lock; try restarting transaction Now, thread2 get the select query finished because thread1 quits. In addition, in thread1, if I input the update query with a where clause, it can be executed very well: mysql> update SeqNum set `current_seq_num` = 8 where `current_seq_num` =5 Query OK, 1 row affected (0.00 sec) Could anyone explain this?

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• Process Close does not close a process when performed in a SetTimer label

  - by NbdNnm

  The script below creates a child process to perform FileExist() separately from the main script so that it avoids halting the script when an unknown network path is passed. However, the command, Process close, does not close the given process despite its ErrorLevel indicates it succeeded to close. Task Manager shows the child process still exists. FileExistTimeout() ; this checks if the necessary parameters are passed ; this checks if the given path exists by creating a child process with the given timeout PathToCheck := "\\1.2.3.4\test" msgbox, 64, Test Result, % FileExistTimeout(PathToCheck) "`n" ErrorLevel FileExistTimeout(strPath="", nTimeout=1000, strSwitch="/fe") { global strParam1 = %1% strParam2 = %2% ; if the function is used to check the script parameters if (strPath="") { if (strParam2 = strSwitch) && strParam1 ; this means the function is placed at the beginning of the script. ExitApp % (FileExist(strParam1) != "") + 1 ; Return 1 or 2. Return } ; create a child process to check the path tooltip, RunWait is performing.... SetTimer, FileExistTimeout, % -1 * nTimeout RunWait "%A_AhkPath%" "%A_ScriptFullPath%" "%strPath%" "%strSwitch%",,, nPID SetTimer, FileExistTimeout, Off ; Disable the timer (if it hasn't fired already). tooltip ; ErrorLevel contains the exit code of the process (from RunWait). if ErrorLevel = 2 ; found return true else if ErrorLevel = 1 ; not found return return ; timeout FileExistTimeout: Process Close, %nPID% ; Timed out - terminate the process. tooltip, % "Process Closed: " ErrorLevel "`n" "Used Pid: " nPID,,, 2 return }

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