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• PHP 5.3.8 startup warning

  - by David

  How do I solve my PHP startup warning: PHP Warning: PHP Startup: Unable to load dynamic library '/usr/lib/php/extensions /no-debug-non-zts-20090626/imap.so' - /usr/lib/php/extensions/no-debug-non-zts-20090626 /imap.so: cannot open shared object file: No such file or directory in Unknown on line 0 PHP Warning: PHP Startup: Unable to load dynamic library '/usr/lib/php/extensions /no-debug-non-zts-20090626/mcrypt.so' - /usr/lib/php/extensions/no-debug-non-zts- 20090626/mcrypt.so: cannot open shared object file: No such file or directory in Unknown on line 0 PHP Warning: PHP Startup: Unable to load dynamic library '/usr/lib/php/extensions /no-debug-non-zts-20090626/memcache.so' - /usr/lib/php/extensions/no-debug-non-zts- 20090626/memcache.so: cannot open shared object file: No such file or directory in Unknown on line 0 PHP Warning: PHP Startup: Unable to load dynamic library '/usr/lib/php/extensions /no-debug-non-zts-20090626/mysql.so' - /usr/lib/php/extensions/no-debug-non-zts- 20090626/mysql.so: cannot open shared object file: No such file or directory in Unknown on line 0 PHP Warning: PHP Startup: Unable to load dynamic library '/usr/lib /php/extensions/no-debug-non-zts-20090626/mysqli.so' - /usr/lib/php/extensions /no-debug-non-zts-20090626/mysqli.so: cannot open shared object file: No such file or directory in Unknown on line 0 PHP Warning: PHP Startup: Unable to load dynamic library '/usr/lib/php/extensions /no-debug-non-zts-20090626/pdo.so' - /usr/lib/php/extensions/no-debug-non-zts-20090626 /pdo.so: cannot open shared object file: No such file or directory in Unknown on line 0 PHP Warning: PHP Startup: Unable to load dynamic library '/usr/lib/php/extensions /no-debug-non-zts-20090626/pdo_mysql.so' - /usr/lib/php/extensions/no-debug-non-zts- 20090626/pdo_mysql.so: cannot open shared object file: No such file or directory in Unknown on line 0 PHP Warning: PHP Startup: Unable to load dynamic library '/usr/lib/php/extensions /no-debug-non-zts-20090626/suhosin.so' - /usr/lib/php/extensions/no-debug-non-zts- 20090626/suhosin.so: cannot open shared object file: No such file or directory in Unknown on line 0 I've many configuration files in my config folder, I don't know where they come from: PHP Deprecated: Comments starting with '#' are deprecated in /etc/php5/conf.d/gd.ini on line 1 in Unknown on line 0 PHP Deprecated: Comments starting with '#' are deprecated in /etc/php5/conf.d/gd.ini on line 2 in Unknown on line 0 PHP Deprecated: Comments starting with '#' are deprecated in /etc/php5/conf.d/imap.ini on line 1 in Unknown on line 0 PHP Deprecated: Comments starting with '#' are deprecated in /etc/php5/conf.d/mcrypt.ini on line 1 in Unknown on line 0 PHP Deprecated: Comments starting with '#' are deprecated in /etc/php5/conf.d /memcache.ini on line 1 in Unknown on line 0 PHP Deprecated: Comments starting with '#' are deprecated in /etc/php5/conf.d /mysql.ini on line 1 in Unknown on line 0 PHP Deprecated: Comments starting with '#' are deprecated in /etc/php5/conf.d /mysqli.ini on line 1 in Unknown on line 0 PHP Deprecated: Comments starting with '#' are deprecated in /etc/php5/conf.d/pdo.ini on line 1 in Unknown on line 0 PHP Deprecated: Comments starting with '#' are deprecated in /etc/php5/conf.d /pdo_mysql.ini on line 1 in Unknown on line 0 PHP Deprecated: Comments starting with '#' are deprecated in /etc/php5/conf.d/xcache.ini on line 1 in Unknown on line 0 PHP Deprecated: Comments starting with '#' are deprecated in /etc/php5/conf.d/xcache.ini on line 9 in Unknown on line 0 Because of the warning I think I don't need them?

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• Why does Graphviz fail on gvLayout?

  - by David Brown

  Once again, here I am writing C without really knowing what I'm doing... I've slapped together a simple function that I can call from a C# program that takes a DOT string, an output format, and a file name and renders a graph using Graphviz. #include "types.h" #include "graph.h" #include "gvc.h" #define FUNC_EXPORT __declspec(dllexport) // Return codes #define GVUTIL_SUCCESS 0 #define GVUTIL_ERROR_GVC 1 #define GVUTIL_ERROR_DOT 2 #define GVUTIL_ERROR_LAYOUT 3 #define GVUTIL_ERROR_RENDER 4 FUNC_EXPORT int RenderDot(char * dotData, const char * format, const char * fileName) { Agraph_t * g; // The graph GVC_t * gvc; // The Graphviz context int result; // Result of layout and render operations // Create a new graphviz context gvc = gvContext(); if (!gvc) return GVUTIL_ERROR_GVC; // Read the DOT data into the graph g = agmemread(dotData); if (!g) return GVUTIL_ERROR_DOT; // Layout the graph result = gvLayout(gvc, g, "dot"); if (result) return GVUTIL_ERROR_LAYOUT; // Render the graph result = gvRenderFilename(gvc, g, format, fileName); if (result) return GVUTIL_ERROR_RENDER; // Free the layout gvFreeLayout(gvc, g); // Close the graph agclose(g); // Free the graphviz context gvFreeContext(gvc); return GVUTIL_SUCCESS; } It compiles fine, but when I call it, I get GVUTIL_ERROR_LAYOUT. At first, I thought it might have been how I was declaring my P/Invoke signature, so I tested it from a C program instead, but it still failed in the same way. RenderDot("digraph graphname { a -> b -> c; }", "png", "C:\testgraph.png"); Did I miss something? EDIT If there's a chance it has to do with how I'm compiling the code, here's the command I'm using: cl gvutil.c /I "C:\Program Files (x86)\Graphviz2.26\include\graphviz" /LD /link /LIBPATH:"C:\Program Files (x86)\Graphviz2.26\lib\release" gvc.lib graph.lib cdt.lib pathplan.lib I've been following this tutorial that explains how to use Graphviz as a library, so I linked to the .lib files that it listed.

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• Game loop and time tracking

  - by David Brown

  Maybe I'm just an idiot, but I've been trying to implement a game loop all day and it's just not clicking. I've read literally every article I could find on Google, but the problem is that they all use different timing mechanisms, which makes them difficult to apply to my particular situation (some use milliseconds, other use ticks, etc). Basically, I have a Clock object that updates each time the game loop executes. internal class Clock { public static long Timestamp { get { return Stopwatch.GetTimestamp(); } } public static long Frequency { get { return Stopwatch.Frequency; } } private long _startTime; private long _lastTime; private TimeSpan _totalTime; private TimeSpan _elapsedTime; /// <summary> /// The amount of time that has passed since the first step. /// </summary> public TimeSpan TotalTime { get { return _totalTime; } } /// <summary> /// The amount of time that has passed since the last step. /// </summary> public TimeSpan ElapsedTime { get { return _elapsedTime; } } public Clock() { Reset(); } public void Reset() { _startTime = Timestamp; _lastTime = 0; _totalTime = TimeSpan.Zero; _elapsedTime = TimeSpan.Zero; } public void Tick() { long currentTime = Timestamp; if (_lastTime == 0) _lastTime = currentTime; _totalTime = TimestampToTimeSpan(currentTime - _startTime); _elapsedTime = TimestampToTimeSpan(currentTime - _lastTime); _lastTime = currentTime; } public static TimeSpan TimestampToTimeSpan(long timestamp) { return TimeSpan.FromTicks( (timestamp * TimeSpan.TicksPerSecond) / Frequency); } } I based most of that on the XNA GameClock, but it's greatly simplified. Then, I have a Time class which holds various times that the Update and Draw methods need to know. public class Time { public TimeSpan ElapsedVirtualTime { get; internal set; } public TimeSpan ElapsedRealTime { get; internal set; } public TimeSpan TotalVirtualTime { get; internal set; } public TimeSpan TotalRealTime { get; internal set; } internal Time() { } internal Time(TimeSpan elapsedVirtualTime, TimeSpan elapsedRealTime, TimeSpan totalVirutalTime, TimeSpan totalRealTime) { ElapsedVirtualTime = elapsedVirtualTime; ElapsedRealTime = elapsedRealTime; TotalVirtualTime = totalVirutalTime; TotalRealTime = totalRealTime; } } My main class keeps a single instance of Time, which it should constantly update during the game loop. So far, I have this: private static void Loop() { do { Clock.Tick(); Time.TotalRealTime = Clock.TotalTime; Time.ElapsedRealTime = Clock.ElapsedTime; InternalUpdate(Time); InternalDraw(Time); } while (!_exitRequested); } The real time properties of the time class turn out great. Now I'd like to get a proper update/draw loop working so that the state is updated a variable number of times per frame, but at a fixed timestep. At the same time, the Time.TotalVirtualTime and Time.ElapsedVirtualTime should be updated accordingly. In addition, I intend for this to support multiplayer in the future, in case that makes any difference to the design of the game loop. Any tips or examples on how I could go about implementing this (aside from links to articles)?

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• Problem with onRetainNonConfigurationInstance

  - by David

  I am writing a small app using the Android SDK, 1.6 target, and the Eclipse plug-in. I have layouts for both portrait and landscape mode, and most everything is working well. I say most because I am having issues with the orientation change. One part of the app has a ListView "on top of" another section. That section consists of 4 checkboxes, a button, and some TextViews. That is the portrait version. The landscape version replaces the ListView with a Spinner and rearranges some of the other components (but leaves the ALL resource ids the same). While in either orientation things work like they should. It's when the app switches orientation that things go off. Only 1 of the checkboxes maintains it's state throughout both layout changes. The other three CBs only maintain their state when going from landscape-portrait. I am also having problem getting the ListView/Spinner to correctly set themselves on changing. I am using onRetainNonConfigurationInstance() and creating a custom object that is returned. When I step through the code during a orientation change, the custom object is successfully pulled back out the the ether, and the widgets are being set to the correct values (inspecting them). But for some reason, once the onCreate is done, the checkboxes are not set to true. public class SkillSelectionActivity extends Activity { private Button rollDiceButton; private ListView skillListView; private CheckBox makeCommonCB; private CheckBox useEdgeCB; private CheckBox useSpecializationCB; private CheckBox isExtendedCB; private TextView skillNameView; private TextView skillRanksView; private TextView rollResultView; private TextView rollSuccessesView; private TextView rollFailuresView; private TextView extendedTestTotalView; private TextView extendedTestTimeView; private TextView skillSpecNameView; private int extendedTestTotal = 0; private int extendedTestTime = 0; private Skill currentSkill; private int currentPosition = 0; private SRCharacter character; private int skillSelectionType; private Spinner skillSpinnerView; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.skill_selection2); Intent intent = getIntent(); Bundle extras = intent.getExtras(); skillSelectionType = extras.getInt("SKILL_SELECTION"); skillListView = (ListView) findViewById(R.id.skillList); skillSpinnerView = (Spinner) findViewById(R.id.skillSpinner); rollDiceButton = (Button) findViewById(R.id.rollDiceButton); makeCommonCB = (CheckBox) findViewById(R.id.makeCommonCB); useEdgeCB = (CheckBox) findViewById(R.id.useEdgeCB); useSpecializationCB = (CheckBox) findViewById(R.id.useSpecializationCB); isExtendedCB = (CheckBox) findViewById(R.id.extendedTestCB); skillNameView = (TextView) findViewById(R.id.skillName); skillRanksView = (TextView) findViewById(R.id.skillRanks); rollResultView = (TextView) findViewById(R.id.rollResult); rollSuccessesView = (TextView) findViewById(R.id.rollSuccesses); rollFailuresView = (TextView) findViewById(R.id.rollFailures); extendedTestTotalView = (TextView) findViewById(R.id.extendedTestTotal); extendedTestTimeView = (TextView) findViewById(R.id.extendedTestTime); skillSpecNameView = (TextView) findViewById(R.id.skillSpecName); character = ((SR4DR) getApplication()).getCharacter(); ConfigSaver data = (ConfigSaver) getLastNonConfigurationInstance(); if (data == null) { makeCommonCB.setChecked(false); useEdgeCB.setChecked(false); useSpecializationCB.setChecked(false); isExtendedCB.setChecked(false); currentSkill = null; } else { currentSkill = data.getSkill(); currentPosition = data.getPosition(); useEdgeCB.setChecked(data.isEdge()); useSpecializationCB.setChecked(data.isSpec()); isExtendedCB.setChecked(data.isExtended()); makeCommonCB.setChecked(data.isCommon()); if (skillSpinnerView != null) { skillSpinnerView.setSelection(currentPosition); } if (skillListView != null) { skillListView.setSelection(currentPosition); } } // Register handler for UI elements rollDiceButton.setOnClickListener(new View.OnClickListener() { public void onClick(View v) { // guts removed for clarity } }); makeCommonCB.setOnCheckedChangeListener(new OnCheckedChangeListener() { public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) { // guts removed for clarity } }); isExtendedCB.setOnCheckedChangeListener(new OnCheckedChangeListener() { public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) { // guts removed for clarity } }); useEdgeCB.setOnCheckedChangeListener(new OnCheckedChangeListener() { public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) { // guts removed for clarity } }); useSpecializationCB.setOnCheckedChangeListener(new OnCheckedChangeListener() { public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) { // guts removed for clarity } }); if (skillListView != null) { skillListView.setOnItemClickListener(new OnItemClickListener() { @Override public void onItemClick(AdapterView<?> parent, View v, int position, long id) { // guts removed for clarity } }); } if (skillSpinnerView != null) { skillSpinnerView.setOnItemSelectedListener(new MyOnItemSelectedListener()); } populateSkillList(); } private void populateSkillList() { String[] list = character.getSkillNames(skillSelectionType); if (list == null) { list = new String[0]; } if (skillListView != null) { ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, R.layout.list_item, list); skillListView.setAdapter(adapter); } if (skillSpinnerView != null) { ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, list); adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); skillSpinnerView.setAdapter(adapter); } } public class MyOnItemSelectedListener implements OnItemSelectedListener { public void onItemSelected(AdapterView<?> parent, View view, int position, long id) { // guts removed for clarity } public void onNothingSelected(AdapterView<?> parent) { // Do nothing. } } @Override public Object onRetainNonConfigurationInstance() { ConfigSaver cs = new ConfigSaver(currentSkill, currentPosition, useEdgeCB.isChecked(), useSpecializationCB.isChecked(), makeCommonCB.isChecked(), isExtendedCB.isChecked()); return cs; } class ConfigSaver { private Skill skill = null; private int position = 0; private boolean edge; private boolean spec; private boolean common; private boolean extended; public ConfigSaver(Skill skill, int position, boolean useEdge, boolean useSpec, boolean isCommon, boolean isExt) { this.setSkill(skill); this.position = position; this.edge = useEdge; this.spec = useSpec; this.common = isCommon; this.extended = isExt; } // public getters and setters removed for clarity } }

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• Downloading file from server (asp.net) to IE8 Content-Disposition problem with file name

  - by David

  I am downloading a file from the server/database via aspx page. When using the content-disposition inline the document opens in correct application but the file name is the same as the web page. I want the document to open in say MS Word but with the correct file name. Here is the code that I am using Response.Buffer = true; Response.ClearContent(); Response.ClearHeaders(); Response.Clear(); Response.ContentType = MimeType(fileName); //function to return the correct MIME TYPE Response.AddHeader("Content-Disposition", @"inline;filename=" + fileName); Response.AddHeader("Content-Length", image.Length.ToString()); Response.BinaryWrite(image); Response.Flush(); Response.Close(); So again, I want the file to open in MS Word with the correct document file name so that the user can properly save/view. Ideas? thanks

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• JSON on IE6 (IE7)

  - by David Thorisson

  Sorry for my inpatience but after weeks staying up late and just having put my web online, I just don't have any left energy to debug... I just can't Google how to implement JSON on IE6 & IE7... I'm using JSON.stringify(...) From what I understand JSON is not built in on IE6-7 and has to be dynamically added in in-line code... how do you do that? I already have jQuery - is it my correct understanding that their JSON engine relies on the browser native one? Then some comment on invalid JSON code that makes IE6-7 fail, but I thought it wasn't native in IE6-7? Anyone?

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• OracleXETNSListener won't start

  - by David

  For some unknown reason OracleXETNSListener won't start which prevents SQL Developer from connecting to it. C:\oraclexe\app\oracle\product\10.2.0\server\NETWORK\ADMIN\listener.ora and C:\oraclexe\app\oracle\product\10.2.0\server\NETWORK\ADMIN\tnsnames both have correct hostname. C:\oraclexe\app\oracle\product\10.2.0\server\NETWORK\log\sqlnet has the following error: *********************************************************************** Fatal NI connect error 12641, connecting to: (DESCRIPTION=(LOCAL=YES)(ADDRESS=(PROTOCOL=beq))) VERSION INFORMATION: TNS for 32-bit Windows: Version 10.2.0.1.0 - Production Oracle Bequeath NT Protocol Adapter for 32-bit Windows: Version 10.2.0.1.0 - Production Time: 09-MAY-2010 18:08:29 Tracing not turned on. Tns error struct: ns main err code: 12641 TNS-12641: Authentication service failed to initialize ns secondary err code: 0 nt main err code: 0 nt secondary err code: 0 nt OS err code: 0 The only thing I can think of is that I may have changed my workgroup recently, but I don't know why that would matter. Any ideas would be greatly appreciated.

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• iPhone Provisioning: What's it all about?

  - by david van brink

  Grepping around, I see that I'm not AT ALL alone in being... challenged... by the process of setting up an iPhone app, getting it to run, giving it my testers, and so on. I've gotten it to work. Somehow I emailed a copy or two to testers, and eventually got my li'l app into the store, and that was fine. But I can't say a really, deeply understand it! (And I don't do iDev every day. Even now my recollection of what I did is kind-of hazy.) I'm moderately capable of understanding things, if presented, well, you know, in a way I can understand. Can anyone point me to a crystal clear explanation of what provisioning actually is? I feel that if I understood it, the recipes to do it would be obvious. Thanks!

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• Show Add button after Edit button is clicked?

  - by David.Chu.ca

  I have a view with navigation bar control on the top. The view is in the second level with a "back" button is displayed on the left by default. In my view class, I added a default navigation edit button on the right: self.navigationbarItem.rightButtonItem = self.editButtonItem; with this line of code, an edit button is on the right side, and when it is clicked, the view (table view) becomes editable with delete mark on the left for each row. After that, the edit button's caption becomes "done". All those are done by the default edit button built in the navigation control, I think. I would like to add an add button the left, or replace "back" button when edit is clicked. I guess I have to implement some kind of delegate in my view class. This would provide a place to plug in my code to add the add button on the left when edit button is clicked, and to restore "back" button back when the done button is clicked. If so, what's the delegate? Or is there any other way to achieve it?

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• Has anyone installed NServiceBus onto a Microsoft clustered server?

  - by David

  I am trying to install NServiceBus onto a clustered win2k3 host. The configuration utility provided (runner.exe) throw some errors that I did not catch, and it now runs correctly. When running NServiceBus.Host.exe i am get this error repeatedly: System.Transactions.TransactionAbortedException: The transaction has aborted. --- System.Transactions.TransactionManagerCommunicationException: Communication with the underlying transaction manager has failed. --- System.Runtime.InteropServices.COMException (0x8004D01B): The Transaction Manager is not available. (Exception from HRESULT: 0x8004D01B) at System.Transactions.Oletx.IDtcProxyShimFactory.ConnectToProxy(String nodeName, Guid resourceManagerIdentifier, IntPtr managedIdentifier, Boolean& nodeNameMatches, UInt32& whereaboutsSize, CoTaskMemHandle& whereaboutsBuffer, IResourceManagerShim& resourceManagerShim) at System.Transactions.Oletx.DtcTransactionManager.Initialize() --- End of inner exception stack trace --- at System.Transactions.Oletx.OletxTransactionManager.ProxyException(COMException comException) at System.Transactions.Oletx.DtcTransactionManager.Initialize() at System.Transactions.Oletx.DtcTransactionManager.get_ProxyShimFactory() at System.Transactions.Oletx.OletxTransactionManager.CreateTransaction(TransactionOptions properties) at System.Transactions.TransactionStatePromoted.EnterState(InternalTransaction tx) --- End of inner exception stack trace --- at System.Transactions.TransactionStateAborted.CheckForFinishedTransaction(InternalTransaction tx) at System.Transactions.EnlistableStates.Promote(InternalTransaction tx) at System.Transactions.Transaction.Promote() at System.Transactions.TransactionInterop.ConvertToOletxTransaction(Transaction transaction) at System.Transactions.TransactionInterop.GetDtcTransaction(Transaction transaction) at System.Messaging.MessageQueue.StaleSafeReceiveMessage(UInt32 timeout, Int32 action, MQPROPS properties, NativeOverlapped* overlapped, ReceiveCallback receiveCallback, CursorHandle cursorHandle, IntPtr transaction) at System.Messaging.MessageQueue.ReceiveCurrent(TimeSpan timeout, Int32 action, CursorHandle cursor, MessagePropertyFilter filter, MessageQueueTransaction internalTransaction, MessageQueueTransactionType transactionType) at System.Messaging.MessageQueue.Receive(TimeSpan timeout, MessageQueueTransactionType transactionType) at NServiceBus.Unicast.Transport.Msmq.MsmqTransport.ReceiveMessageFromQueueAfterPeekWasSuccessful() in d:\BuildAgent-02\work\672d81652eaca4e1\src\impl\unicast\NServiceBus.Unicast.Msmq\MsmqTransport.cs:line 551 Has anyone successfully put NServiceBus onto a clustered server, if so, how did you get it working?

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• Pass data to Master Page with ASP.NET MVC

  - by Brian David Berman

  I have a hybrid ASP.NET WebForms/MVC project. In my Master Page, I have a "menu" User Control and a "footer" User Control. Anyways. I need to pass some data (2 strings) to my "menu" User Control on my Master Page (to select the current tab in my menu navigation, etc.) My views are strongly-typed to my data model. How can I push data from my controller to my menu or at least allow my master page to access some data pre-defined in my controller? Note: I understand this violates pure ASP.NET MVC, but like I said, it is a hybrid project. The main purpose of my introduction to ASP.NET MVC into my project was to have more control over my UI for certain situations only.

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• Why doesn't this method print its text? (java)

  - by David

  here's the method: public static int chooseStrat () { String[] strats = new String[1] ; strats[0] = "0 - Blob" ; int n ; boolean a = false ; while (a == false) ; { System.out.println ("Which strategy should the AI use?(#)") ; printArrayS (strats) ; n = getInt () ; System.out.println ("you selected "+n+"."+" are you sure you want the computer to use the "+ strats[n]+ " ?(Y/N)") ; String c = getIns () ; while ((((!( (c.equals ("y")) || (c.equals ("Y")) )) && (!( (c.equals ("n")) || (c.equals ("N")) ) ) ))) ; { System.out.println ("try again") ; c = getIns () ; } if ( (c.equals ("Y")) || (c.equals ("y")) ) a = true ; } return n ; } When i run this it never prints "Which strategy should the AI use?(#)" it just tries to get an entry from the keyboard. why does it do this?

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• Floating point inaccuracy examples

  - by David Rutten

  How do you explain floating point inaccuracy to fresh programmers and laymen who still think computers are infinitely wise and accurate? Do you have a favourite example or anecdote which seems to get the idea across much better than an precise, but dry, explanation? How is this taught in Computer Science classes?

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• Application/Server dependency mapping

  - by David Stratton

  I'm just curious as to whether such as tool exists (free, open source, or commercial but for a reasonable price) before I build it myself. We're looking for a simple solution to simplify taking web apps online and offline when a server is undergoing maintenance. The idea is that we be able to mark a server as unavailable, and then mark all dependent (direct and indirect) as offline. Our first proof-of-concept is running, and we created an aspx page that lists various applications that have an App_Offline.html file with a friendly "Down for Maintenance" message in a GridView. In the GridView, each app has a LinkButton that, when clicked, either renames the App_Offline.htm to App_Offline.html or vice-versa to take the app online and offline. The next step is to set up all of our dependencies. For example, our store locater would be dependent on our web services, which in turn are dependent on our SQL Server. (that's a simple example. We can easily have several layers, or one app dependent on multiple servers, etc.) In this example, if the SQL server goes down, we would need to drill down recursively to find all apps that depend on it, and then turn them off and on by renaming the App_Offline file appropriately. I realize this will be relatively simple to build, but could be complex to manage. I'm sure we're not the first team to think of this concept, and I'm wondering if there are any open source tools, or if any of you have done something similar and can help us avoid pitfalls. Edit - Update I found the category of software I'm looking for. it's called CMDB - (Configuration Management Database), and it's generally more of a Network Admin type tool than a developer tool. I found some open source products in this category, but none written in .NET. I had considered moving this question to ServerFault.com when I realized I was looking for a netowrk Admin type tool, but since I'm looking for code and a modifiable solution I'll keep the question here.

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• "Bad binary signature" in ASP.NET MVC application

  - by David M

  We are getting the error above on some pages of an ASP.NET MVC application when it is deployed to a 64 bit Windows 2008 server box. It works fine on our development machines, though these are 32 bit XP. Just wondered if anyone had encountered this before, and has any suggestions? Details as follows: Bad binary signature. (Exception from HRESULT: 0x80131192) Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. Exception Details: System.Runtime.InteropServices.COMException: Bad binary signature. (Exception from HRESULT: 0x80131192) All projects are set to compile for Any CPU, and are compiled in Release mode. The ASP.NET site is precompiled, and the precompiled build is on a 64 bit Windows 2008 TeamCity build agent. Thanks in advance. EDIT We're still plagued by this. I have looked at all the binaries in the website's bin directory using corflags.exe. None has the 32BIT flag set, and all have a CorFlags value of 9 except for Antlr3.Runtime.dll which has a value of 1. The problem only affects certain pages, and it seems to be those which use FluentValidation (including FluentValidation.Mvc and FluentValidation.xValIntegration assemblies). None of these shows anything out of the ordinary when inspected with corflags.exe, and there are no odd looking dependencies revealed by ildasm. When built locally (32 bit Windows XP) the site deploys and runs fine. When built on the build agents (64 bit Windows 2008 Server) the site displays these errors. The site runs in Integrated Pipeline mode, and is not set to 32 bit. The stack trace is: [COMException (0x80131192): Bad binary signature. (Exception from HRESULT: 0x80131192)] ASP.views_user_newinternal_aspx.__RenderContent2(HtmlTextWriter __w, Control parameterContainer) in e:\TeamCity\buildAgent\work\605ee6b4a5d1dd36\...Admin.Mvc\Views\User\NewInternal.aspx:53 System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +115 ASP.views_shared_site_master.__Render__control1(HtmlTextWriter __w, Control parameterContainer) in e:\TeamCity\buildAgent\work\605ee6b4a5d1dd36\...Admin.Mvc\Views\Shared\Site.Master:26 System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +115 System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +240 System.Web.UI.Page.Render(HtmlTextWriter writer) +38 System.Web.Mvc.ViewPage.Render(HtmlTextWriter writer) +94 System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +4240

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• Is Visual Studio 2010 WebDev WebServer (Cassini) 64-bit compatible?

  - by David

  I'm now developing on Visual Studio 2008 on a 64-bit OS (Windows Server 2008 64-bit). While the apps I write are 64-bit capable, as is IIS7, the built-in ASP.NET Development Server (aka Cassini aka WebDev.Webserver.exe) runs as 32-bit. This brings up a plethora of issues, such as: 32-bit and 64-bit applications have separate HKLM\Software registry homes There are 32-bit and 64-bit versions of the SQL Server Client Network Utility Other fun surprises I haven't discovered but I'm sure will spring up While I am finding workarounds for most of this, I have to ask... Does anyone who has played with the Visual Studio 2010 preview bits on 64-bit architecture know if the development web servers can handle 64-bit, and if so, are there options for which mode to run it in? (Like a checkbox in the project properties, for instance)

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• Which doctype should I use for GWT 2.0?

  - by David

  I think I should use <!DOCTYPE html> for my new GWT application; I understand that doing so will put my application into standards-compliant mode. Am I correct? Are there any disadvantages to using this doctype? Does GWT work properly in standards-compliant mode? I'm wary because the GWT tutorial still uses the HTML 4.01 transitional doctype.

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• Generating Entity Keys

  - by David Veeneman

  I have run into my first dissapointment with Entity Framework 4. It turns out that SQL CE, when used with EF4, does not support autogenerated primary keys. I get a System.Data.UpdateException from OnjectContext.SaveChanges() with this message: Server-generated keys and server-generated values are not supported by SQL Server Compact. So, now I have to manually generate keys for my entities. Assuming I want to use auto-incremented integer keys, what is the best way to go about generating and keeping track of the keys when using Entity Framework? Thanks for your help.

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• Supplementary Developer Laptop

  - by David Silva Smith

  I'm looking to buy a laptop with the following specs for a developer. The goal will be to have a development machine supplementing the devs desktop. During work hours the dev will be on a beefy desktop. For working while on the go: trains, client sites, code camps, it would be nice to have a machine which can run Visual Studio 2008 without needing to remote desktop into their primary machine. What do you think is the lowest cost laptop meeting this need? Here are the specs I have in mind: SSD drive 64GB-doesn't need to be huge, most data is stored on servers. Will need to fit Windows 7, IIS, SQL Server, and Visual Studio 2010. RAM-3GB processor =Pentium Core 2 duo Screen size = 14 inches. OS doesn't matter. It will be paved with Windows 7 Ultimate optical drive omitted would be a plus. weight and battery life aren't so important because the machine will be plugged in almost all the time.

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• Proper MIME type for fonts

  - by David Hedlund

  Searching the web, I find heaps of different suggestions for what the proper MIME type for a font is, but I have yet to try any MIME type that rids me of a Chrome warning such as the following: Resource interpreted as font but transferred with MIME type font/otf The font is an OTF. I've tried the following MIME types so far font/otf application/font-otf application/font application/otf application/octet-stream application/x-font-otf application/x-font-TrueType (I know it's not truetype, but one source quoted this for OTF)

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• Linq to Xml to Datagridview

  - by David Archer

  Right, starting to go crazy here. I have the following code: var query = (from c in db.Descendants("Customer") select c.Elements()); dgvEditCusts.DataSource = query.ToList(); In this, db relates to an XDocument.Load call. How can I get the data into the DataGridView? Just thought I should mention: it returns a completely blank dgv

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• Force-directed graphing

  - by David

  Hello, I'm trying to write a force-directed or force-atlas code base for a graphing application I'm building for myself. Here is an example of what I'm attempting: http://sawamuland.com/flash/graph.html I managed to find some pseudo code to accomplish what I'd like on the Wiki Force-atlas article. I've converted this into ActionScript 3.0 code since it's a Flash application. Here is my source: var timestep:int = 0; var damping:int = 0; var total_kinetic_engery:int = 0; for (var node in list) { var net_force:int = 0; for (var other_node in list) { net_force += coulombRepulsion(node, other_node, nodeList); } for (var spring in list[node].relations) { net_force += hookeAttraction(node, spring, nodeList); } list[node].velocity += (timestep * net_force) * damping; list[node].position += timestep * list[node].velocity; total_kinetic_engery += list[node].mass * (list[node].velocity) ^ 2; } The problem now is finding pseudo code or a function to perform the the coulomb repulsion and hooke attraction code. I'm not exactly sure how to accomplish this. Does anyone know of a good reference I can look at...understand and implement quickly? Best.

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• Draw to offscreen renderbuffer in OpenGL ES (iPhone)

  - by David Ensminger

  I'm trying to create an offscreen render buffer in OpenGL ES on the iPhone. I've created the buffer like this: glGenFramebuffersOES(1, &offscreenFramebuffer); glBindFramebufferOES(GL_FRAMEBUFFER_OES, offscreenFramebuffer); glGenRenderbuffersOES(1, &offscreenRenderbuffer); glBindRenderbufferOES(GL_RENDERBUFFER_OES, offscreenRenderbuffer); glFramebufferRenderbufferOES(GL_FRAMEBUFFER_OES, GL_COLOR_ATTACHMENT0_OES, GL_RENDERBUFFER_OES, offscreenRenderbuffer); But I'm confused on how to render the storage. Apple's documentation says to use the EAGLContext renderBufferStorage:fromDrawable: method, but this seems to only work for one render buffer (the main one being displayed). If I use the normal OpenGL function glRenderBufferStorageOES, then I can't seem to get it to display. Here's the code: // this is in the initialization section: glRenderbufferStorageOES(GL_RENDERBUFFER_OES, GL_RGB8_OES, backingWidth, backingHeight); // and this is when I'm trying to draw to it and display it: glBindFramebufferOES(GL_FRAMEBUFFER_OES, offscreenFramebuffer); GLfloat vc[] = { 0.0f, 0.0f, 0.0f, 10.0f, 10.0f, 10.0f, 0.0f, 0.0f, 0.0f, -10.0f, -10.0f, -10.0f, }; glLoadIdentity(); glEnableClientState(GL_VERTEX_ARRAY); glVertexPointer(3, GL_FLOAT, 0, vc); glDrawArrays(GL_LINES, 0, 4); glDisableClientState(GL_VERTEX_ARRAY); glBindRenderbufferOES(GL_RENDERBUFFER_OES, offscreenRenderbuffer); [context presentRenderbuffer:GL_RENDERBUFFER_OES]; Doing it this way, nothing is displayed on the screen. However, if I switch out the references to "offscreen...Buffer" to the buffers that were created with the renderBufferStorage method, it works fine. Any suggestions?

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• Way to Remove Invite Limit on FBML Multi-Friend Selector

  - by David

  Hi there, I tried to look through various resources before posting here, but was having a surprisingly difficult time finding an answer to my question. Sorry in advance if I overlooked it. I'm currently trying to add the FBML Multi-Friend Selector to my Facebook page. It has a limit on the number of friends you can invite at a time ("Add up to 20 of your friends by clicking on their pictures below"). From what I've looked through it sounds like 20 is the max number of friends a user can invite, but then looking at Mint's page, they have a 22 max invite (http://www.facebook.com/mint?ref=ts) I thought it might be based on number of page fans, as Mint has 56,000, but that doesn't seem to be the case as this page only has 256 fans and have a max of 26 friend invites (http://www.facebook.com/tivix?v=app_106437999388442). Therefore, I don't really understand how this system works. Is there a way for me to increase to 26? Unlimited? Thanks for your help!

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• iTextSharp HTMLWorker img not found 404

  - by David

  Hi, i got the problem that the HTMLWorker.ParseToList function will throw an exception ( 404 - not found ) when a tag like: <img alt="none" src="/image.jpg" /> has a deadlink in the src... i'd like it to just not load the image and go on... Does anyone now a way to configure this or has similar solution in mind?

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