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  • Watch an End to End Value Chain Demo

    - by Pam Petropoulos
    Ever wonder how Oracle’s Value Chain solutions can deliver end to end value? Check out this demo video which outlines how Oracle solutions can improve business processes from product development through planning and across logistics for flawless execution. Click here to watch the video.     Click here to learn more about Oracle Supply Chain Management solutions.  

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  • Oracle Identity Management 11gR2 Live Event - New York

    - by Tanu Sood
      Are you in New York or the vicinity on September 6? If so, come join Amit Jasuja, Senior Vice President, Security and Identity Management at Oracle as he discusses the evolution of Oracle identity Management solutions and the business drivers (and industry trends) behind those. You have heard about some of the new experiences delivered with the latest release of Oracle Identity Management - simplified user experience, enhanced security and seamless enablement for secure cloud and mobile environments. Now come see it in action and hear what customers, your peers, are saying about their implementations. This forum will also be a great opportunity for you to connect directly with technology experts and network with industry professionals. There is still time left to register so book your space today. Registration details as well as the agenda for the day can be found here. We look forward to hosting you on Thursday, September 6th. Oracle Identity Management 11gR2 Live Event – New York Thursday, September 6, 2012 Oracle NYC Office 101 Park Avenue 4th Floor New York, NY 10178 Register Here Not in NY on Sep 6? Find an event near you in North America.

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  • How to choose between using a Domain Event, or letting the application layer orchestrate everything

    - by Mr Happy
    I'm setting my first steps into domain driven design, bought the blue book and all, and I find myself seeing three ways to implement a certain solution. For the record: I'm not using CQRS or Event Sourcing. Let's say a user request comes into the application service layer. The business logic for that request is (for whatever reason) separated into a method on an entity, and a method on a domain service. How should I go about calling those methods? The options I have gathered so far are: Let the application service call both methods Use method injection/double dispatch to inject the domain service into the entity, letting the entity do it's thing and then let it call the method of the domain service (or the other way around, letting the domain service call the method on the entity) Raise a domain event in the entity method, a handler of which calls the domain service. (The kind of domain events I'm talking about are: http://www.udidahan.com/2009/06/14/domain-events-salvation/) I think these are all viable, but I'm unable to choose between them. I've been thinking about this a long time and I've come to a point where I no longer see the semantic differences between the three. Do you know of some guidelines when to use what?

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  • Duplicate DNS Zones (Error 4515 in Event Log )

    - by Campo
    I am getting these two error in the DNS Event log (errors at end of question). I have confirmed I do have duplicate zones. I am wondering which ones to delete. The DomainDNSZone contains all of our DNS records but it does not have the _msdcs zone.... that is in the ForestDNSZone with the duplicates that are not in use. here is a picture of that 3 Questions. I understand the advantages of having DNS in the ForestDNSZone. so... Why is DNS using the DomainDNSZone and is that acceptable considering _msdcs... is in the ForestDNSZone? If so, should I just delete the DC=1.168.192.in-addr.arpa and DC=supernova.local from the ForestDNSZone? Or should I try to get those to be the ones in use? What are those steps? I understand how to delete. That is simple but if i must move zones some info would be appreaciated there. Just to confirm. from my understanding. I can delete the two duplicates in the ForestDNSZone and leave the _msdcs.supernova.local as thats required there. This will resolve the erros I see. Just fyi when I look in those folders from the ForestDNSZone they have just 2 and 1 entries respectively. So obviously not in use compared to the others. I am pretty sure I understand the steps to complete this. But if you would like to provide that info, bonus points! Event Type: Warning Event Source: DNS Event Category: None Event ID: 4515 Date: 1/4/2011 Time: 2:14:18 PM User: N/A Computer: STANLEY Description: The zone 1.168.192.in-addr.arpa was previously loaded from the directory partition DomainDnsZones.supernova.local but another copy of the zone has been found in directory partition ForestDnsZones.supernova.local. The DNS Server will ignore this new copy of the zone. Please resolve this conflict as soon as possible. If an administrator has moved this zone from one directory partition to another this may be a harmless transient condition. In this case, no action is necessary. The deletion of the original copy of the zone should soon replicate to this server. If there are two copies of this zone in two different directory partitions but this is not a transient caused by a zone move operation then one of these copies should be deleted as soon as possible to resolve this conflict. To change the replication scope of an application directory partition containing DNS zones and for more details on storing DNS zones in the application directory partitions, please see Help and Support. For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp. Data: 0000: 89 25 00 00 %.. AND Event Type: Warning Event Source: DNS Event Category: None Event ID: 4515 Date: 1/4/2011 Time: 2:14:18 PM User: N/A Computer: STANLEY Description: The zone supernova.local was previously loaded from the directory partition DomainDnsZones.supernova.local but another copy of the zone has been found in directory partition ForestDnsZones.supernova.local. The DNS Server will ignore this new copy of the zone. Please resolve this conflict as soon as possible. If an administrator has moved this zone from one directory partition to another this may be a harmless transient condition. In this case, no action is necessary. The deletion of the original copy of the zone should soon replicate to this server. If there are two copies of this zone in two different directory partitions but this is not a transient caused by a zone move operation then one of these copies should be deleted as soon as possible to resolve this conflict. To change the replication scope of an application directory partition containing DNS zones and for more details on storing DNS zones in the application directory partitions, please see Help and Support. For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp. Data: 0000: 89 25 00 00 %..

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  • Openfiler crashing without cause or leaving any log messages

    - by user44725
    So my linux machine keeps crashing, without so much as a bye or a leave. I've tried and tried and failed again to work out whats happening. Any help would be much appreciated. Linux chai 2.6.29.6-0.24.smp.gcc3.4.x86_64 #1 SMP Tue Mar 9 05:06:08 GMT 2010 x86_64 x86_64 x86_64 GNU/Linux Openfiler Here is what the /var/log/messages file says at the time of the latest crash. Nothing that unusual - just greg logging in and out via samba. You'll notice there is a cron running for root every minute - ignore this - this isn't the issue either it was some check I've been doing to discover its problem. Jun 2 10:32:01 chai crond(pam_unix)[16529]: session closed for user root Jun 2 10:32:49 chai samba(pam_unix)[15454]: session opened for user greg by (uid=0) Jun 2 10:33:01 chai crond(pam_unix)[16537]: session opened for user root by (uid=0) Jun 2 10:33:04 chai crond(pam_unix)[16537]: session closed for user root Jun 2 10:41:40 chai syslogd 1.4.1: restart. Jun 2 10:41:43 chai syslog: syslogd startup succeeded That restart was called manually by hand - by clicking the restart button on the box. So basically messages isn't revealing many secrets. dmesg only shows from startup. If there is any output I should paste. Just say when and where and it'll be done. Thanks for your help! Tim

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  • ReSharper C# Live Template for Read-Only Dependency Property and Routed Event Boilerplate

    - by Bart Read
    Following on from my previous post, where I shared a Live Template for quickly declaring a normal read-write dependency property and its associated property change event boilerplate, here's an unsurprisingly similar template for creating a read-only dependency property.        #region $PROPNAME$ Read-Only Property and Property Change Routed Event        private static readonly DependencyPropertyKey $PROPNAME$PropertyKey =                                             DependencyProperty.RegisterReadOnly(             "$PROPNAME$", typeof ( $PROPTYPE$ ), typeof ( $DECLARING_TYPE$ ),             new PropertyMetadata( $DEF_VALUE$ , On$PROPNAME$Changed ) );       public static readonly DependencyProperty $PROPNAME$Property =                                           $PROPNAME$PropertyKey.DependencyProperty;        public $PROPTYPE$ $PROPNAME$         {             get { return ( $PROPTYPE$ ) GetValue( $PROPNAME$Property ); }             private set { SetValue( $PROPNAME$PropertyKey, value ); }         }       public static readonly RoutedEvent $PROPNAME$ChangedEvent   =                                           EventManager.RegisterRoutedEvent(           "$PROPNAME$Changed",           RoutingStrategy.$ROUTINGSTRATEGY$,           typeof( RoutedPropertyChangedEventHandler< $PROPTYPE$ > ),           typeof( $DECLARING_TYPE$ ) );       public event RoutedPropertyChangedEventHandler< $PROPTYPE$ > $PROPNAME$Changed       {           add { AddHandler( $PROPNAME$ChangedEvent, value ); }           remove { RemoveHandler( $PROPNAME$ChangedEvent, value ); }       }        private static void On$PROPNAME$Changed(           DependencyObject d, DependencyPropertyChangedEventArgs e)         {             var $DECLARING_TYPE_var$ = d as $DECLARING_TYPE$;            var args = new RoutedPropertyChangedEventArgs< $PROPTYPE$ >(               ( $PROPTYPE$ ) e.OldValue,               ( $PROPTYPE$ ) e.NewValue );           args.RoutedEvent    = $DECLARING_TYPE$.$PROPNAME$ChangedEvent;           $DECLARING_TYPE_var$.RaiseEvent( args );$END$        }        #endregion The only real difference here is the addition of the DependencyPropertyKey, which allows your implementation to set the value of the dependency property without exposing the setter code to consumers of your type. You'll probably find that you create read-only dependency properties much less often than read-write properties, but this should still save you some typing when you do need to do so. Technorati Tags: resharper,live template,c#,dependency property,read-only,routed events,property change,boilerplate,wpf

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  • C#/.NET: WinForms - "KeyPress" event for textbox is missing?

    - by eibhrum
    Hi, I am trying to add an "KeyPress" event in a textbox (WinForm) this.textBox1.KeyPress += new System.Windows.Forms.KeyPressEventHandler(CheckKeys); and here's inside the 'CheckKeys': private void CheckKeys(object sender, System.Windows.Forms.KeyPressEventArgs e) { if (e.KeyChar == (char)13) { // Enter is pressed - do something } } The idea here is that once a textbox is in focus and the 'Enter' button was pressed, something will happen... However, my machine cannot find the 'KeyPress' event. Is there something wrong with my codes? I need a little help on this one. Thanks.

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  • When writing to the Windows Event Log, is it possible to create a custom link text for URLs?

    - by thomasnguyencom
    I'm just using the vanilla EventLog.WriteEntry method: EventLog.WriteEntry(EVENT_SOURCE, message, EventLogEntryType.Error, id); Here's how the message shows up in the Event Log, with the links in the parenthesis working just fine, but it's ugly: Example 1: Please contact us via email (mailto:[email protected]) or online (http://example.com). Here's how the message shows up in the Event Log, with the HTML "markup", doesn't even handle it: Example 2: Please contact us via <a href="mailto:[email protected]">email</a> or <a href="http://example.com">online</a>. This is how I would like the message to show up, but with "email" and "online" as the link texts: Example 3: Please contact us via email or online. I've tried the <a href>...</a> HTML tags with no success.

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  • Is there a better way to minimize this C# event repetition?

    - by Damien Wildfire
    I have a lot of code like this: public class Microwave { private EventHandler<EventArgs> _doorClosed; public event EventHandler<EventArgs> DoorClosed { add { lock (this) _doorClosed += value; } remove { lock (this) _doorClosed -= value; } } private EventHandler<EventArgs> _lightbulbOn; public event EventHandler<EventArgs> LightbulbOn { add { lock (this) _lightbulbOn += value; } remove { lock (this) _lightbulbOn -= value; } } // ... } You can see that much of this is boilerplate. In Ruby I'd be able to do something like this: class Microwave has_events :door_closed, :lightbulb_on, ... end Is there a similar shorter way of removing this boilerplate in C#?

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  • Does remove a DOM object (in Javascript) will cause Memory leak if it has event attached?

    - by seatoskyhk
    So, if in the javascript, I create a DOM object in the HTML page, and attach event listener to the DOM object, upon I remove the the DOM from HTML page, does the event listener still exist and causing memory leak? function myTest() { var obj = document.createElement('div'); obj.addEventListener('click', function() {alert('whatever'); }); var body = document.getElementById('body'); // assume there is a <div id='body'></div> already body.appendChild(obj); } // then after some user actions. I call this: function emptyPage() { var body = document.getElementById('body'); body.innerHTML = ''; //empty it. } So, the DOM object, <div> inside body is gone. But what about the eventlistener? I'm just afraid that it will cause memory leak.

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  • Sharepoint 2007 Event ID 6482

    - by Dave M
    Our two server SharePoint 2007 SP2 farm has an issue. Event ID 6482 appears in the Application log of the Web front end many times a day. Often many time a minute. The full error is from Office SharePoint Server Event Type: Error Event Source: Office SharePoint Server Event Category: Office Server Shared Services Event ID: 6482 Date: 11/12/2009 Time: 3:05:22 PM User: N/A Computer: XXXXXX Description: Application Server Administration job failed for service instance Microsoft.Office.Server.Search.Administration.SearchServiceInstance (36a9b7ef-59aa-4f94-8887-8bf7b56f2f91). Reason: Error during encryption or decryption. System error code 0. Techinal Support Details: System.ArgumentException: Error during encryption or decryption. System error code 0. at Microsoft.Office.Server.Search.Administration.SearchServiceInstance.SynchronizeDefaultContentSource(IDictionary applications) at Microsoft.Office.Server.Search.Administration.SearchServiceInstance.Synchronize() at Microsoft.Office.Server.Administration.ApplicationServerJob.ProvisionLocalSharedServiceInstances(Boolean isAdministrationServiceJob) For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp. The SharePoint site appears to be functioning normally and Search returns expected results. Any suggestions would be appreciated

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  • Application Event Log keeps getting corrupted

    - by yakatz
    I recently asked about repairing a corrupt event log, because it seemed to be a one-off event. The event log has since exhibited the same behavior 3 times. We have been trying to find patterns, but so far we have found nothing. The server runs several ASP.NET applications and three scheduled tasks written in .NET. The last modified date of the event log once happened to be the same time as one of the scheduled tasks, but the others have not been. Any suggestions of where to look next or a way we can get any information out of a corrupt evtx file? The server is running critical e-commerce applications, so we want to keep the number of restarts required to a minimum. Edit: I ran DUMPEL and got very strange results. 1/9/2012 4:14:05 PM 1 100 1000 Application Error N/A SERVERNAME Faulting application name: w3wp.exe, version: 7.5.7601.17514, time stamp: 0x4ce7a5f8 Faulting module name: ntdll.dll, version: 6.1.7601.17514, time stamp: 0x4ce7ba58 Exception code: 0xc0000374 Fault offset: 0x000ce653 Faulting process id: 0x1070 Faulting application start time: 0x01cccf1386d30991 Faulting application path: C:\Windows\SysWOW64\inetsrv\w3wp.exe Faulting module path: C:\Windows\SysWOW64\ntdll.dll Report Id: dbf4f691-3b06-11e1-9025-005056a602e6 1/9/2012 4:14:07 PM 4 0 1001 Windows Error Reporting N/A SERVERNAME Fault bucket , type 0 Event Name: APPCRASH Response: Not available Cab Id: 0 Problem signature: P1: w3wp.exe P2: 7.5.7601.17514 P3: 4ce7a5f8 P4: StackHash_79d9 P5: 6.1.7601.17514 P6: 4ce7ba58 P7: c0000374 P8: 000ce653 P9: P10: Attached files: C:\Windows\Temp\WER975.tmp.appcompat.txt C:\Windows\Temp\WERA03.tmp.WERInternalMetadata.xml C:\Windows\Temp\WERA13.tmp.hdmp C:\Windows\Temp\WERD21.tmp.mdmp These files may be available here: C:\ProgramData\Microsoft\Windows\WER\ReportQueue\AppCrash_w3wp.exe_cd7d09dfc84119d82a2ac6a789038bd5661acfb_cab_128f0e67 Analysis symbol: Rechecking for solution: 0 Report Id: dbf4f691-3b06-11e1-9025-005056a602e6 Report Status: 4 1/9/2012 4:14:07 PM 4 0 1001 Windows Error Reporting N/A SERVERNAME Fault bucket , type 0 Event Name: APPCRASH Response: Not available Cab Id: 0 Problem signature: P1: w3wp.exe P2: 7.5.7601.17514 P3: 4ce7a5f8 P4: StackHash_79d9 P5: 6.1.7601.17514 P6: 4ce7ba58 P7: c0000374 P8: 000ce653 P9: P10: Attached files: C:\Windows\Temp\WER975.tmp.appcompat.txt C:\Windows\Temp\WERA03.tmp.WERInternalMetadata.xml C:\Windows\Temp\WERA13.tmp.hdmp C:\Windows\Temp\WERD21.tmp.mdmp These files may be available here: C:\ProgramData\Microsoft\Windows\WER\ReportQueue\AppCrash_w3wp.exe_cd7d09dfc84119d82a2ac6a789038bd5661acfb_cab_128f0e67 Analysis symbol: Rechecking for solution: 0 Report Id: dbf4f691-3b06-11e1-9025-005056a602e6 Report Status: 0 1/9/2012 4:14:12 PM 1 100 1000 Application Error N/A SERVERNAME Faulting application name: w3wp.exe, version: 7.5.7601.17514, time stamp: 0x4ce7a5f8 Faulting module name: ntdll.dll, version: 6.1.7601.17514, time stamp: 0x4ce7ba58 Exception code: 0xc0000374 Fault offset: 0x000ce653 Faulting process id: 0x16ac Faulting application start time: 0x01cccf139f475c0c Faulting application path: C:\Windows\SysWOW64\inetsrv\w3wp.exe Faulting module path: C:\Windows\SysWOW64\ntdll.dll Report Id: e03bae70-3b06-11e1-9025-005056a602e6 1/9/2012 4:14:16 PM 4 0 1001 Windows Error Reporting N/A SERVERNAME Fault bucket , type 0 Event Name: APPCRASH Response: Not available Cab Id: 0 Problem signature: P1: w3wp.exe P2: 7.5.7601.17514 P3: 4ce7a5f8 P4: StackHash_9c6c P5: 6.1.7601.17514 P6: 4ce7ba58 P7: c0000374 P8: 000ce653 P9: P10: Attached files: C:\Windows\Temp\WER2579.tmp.appcompat.txt C:\Windows\Temp\WER25F7.tmp.WERInternalMetadata.xml C:\Windows\Temp\WER25F8.tmp.hdmp C:\Windows\Temp\WER28F6.tmp.mdmp These files may be available here: C:\ProgramData\Microsoft\Windows\WER\ReportQueue\AppCrash_w3wp.exe_c49a67649524ad11b64bbf809211bc5ba742a3d6_cab_0b63321b Analysis symbol: Rechecking for solution: 0 Report Id: e03bae70-3b06-11e1-9025-005056a602e6 Report Status: 4 1/9/2012 4:14:16 PM 4 0 1001 Windows Error Reporting N/A SERVERNAME Fault bucket , type 0 Event Name: APPCRASH Response: Not available Cab Id: 0 Problem signature: P1: w3wp.exe P2: 7.5.7601.17514 P3: 4ce7a5f8 P4: StackHash_9c6c P5: 6.1.7601.17514 P6: 4ce7ba58 P7: c0000374 P8: 000ce653 P9: P10: Attached files: C:\Windows\Temp\WER2579.tmp.appcompat.txt C:\Windows\Temp\WER25F7.tmp.WERInternalMetadata.xml C:\Windows\Temp\WER25F8.tmp.hdmp C:\Windows\Temp\WER28F6.tmp.mdmp These files may be available here: C:\ProgramData\Microsoft\Windows\WER\ReportQueue\AppCrash_w3wp.exe_c49a67649524ad11b64bbf809211bc5ba742a3d6_cab_0b63321b Analysis symbol: Rechecking for solution: 0 Report Id: e03bae70-3b06-11e1-9025-005056a602e6 Report Status: 0 1/9/2012 4:14:21 PM 1 100 1000 Application Error N/A SERVERNAME Faulting application name: w3wp.exe, version: 7.5.7601.17514, time stamp: 0x4ce7a5f8 Faulting module name: ntdll.dll, version: 6.1.7601.17514, time stamp: 0x4ce7ba58 Exception code: 0xc0000374 Fault offset: 0x000ce653 Faulting process id: 0x17f8 Faulting application start time: 0x01cccf13a4ba5126 Faulting application path: C:\Windows\SysWOW64\inetsrv\w3wp.exe Faulting module path: C:\Windows\SysWOW64\ntdll.dll Report Id: e57a0a85-3b06-11e1-9025-005056a602e6 1/9/2012 4:14:21 PM 4 0 1001 Windows Error Reporting N/A SERVERNAME Fault bucket , type 0 Event Name: APPCRASH Response: Not available Cab Id: 0 Problem signature: P1: w3wp.exe P2: 7.5.7601.17514 P3: 4ce7a5f8 P4: StackHash_9c6c P5: 6.1.7601.17514 P6: 4ce7ba58 P7: c0000374 P8: 000ce653 P9: P10: Attached files: These files may be available here: C:\ProgramData\Microsoft\Windows\WER\ReportQueue\AppCrash_w3wp.exe_c49a67649524ad11b64bbf809211bc5ba742a3d6_1cfb4872 Analysis symbol: Rechecking for solution: 0 Report Id: e57a0a85-3b06-11e1-9025-005056a602e6 Report Status: 4 1/9/2012 4:14:21 PM 4 0 1001 Windows Error Reporting N/A SERVERNAME Fault bucket , type 0 Event Name: APPCRASH Response: Not available Cab Id: 0 Problem signature: P1: w3wp.exe P2: 7.5.7601.17514 P3: 4ce7a5f8 P4: StackHash_9c6c P5: 6.1.7601.17514 P6: 4ce7ba58 P7: c0000374 P8: 000ce653 P9: P10: Attached files: These files may be available here: C:\ProgramData\Microsoft\Windows\WER\ReportQueue\AppCrash_w3wp.exe_c49a67649524ad11b64bbf809211bc5ba742a3d6_1cfb4872 Analysis symbol: Rechecking for solution: 0 Report Id: e57a0a85-3b06-11e1-9025-005056a602e6 Report Status: 0 None of the files referenced actually exist (not even in WER ReportArchive). These should not be the only events mentioned. The log file has been cleared twice since January 9, so those events should not even be listed at all.

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  • Sharepoint 2007 Event ID 6482

    - by Dave M
    Our two server SharePoint 2007 SP2 farm has an issue. Event ID 6482 appears in the Application log of the Web front end many times a day. Often many time a minute. The full error is from Office SharePoint Server Event Type: Error Event Source: Office SharePoint Server Event Category: Office Server Shared Services Event ID: 6482 Date: 11/12/2009 Time: 3:05:22 PM User: N/A Computer: XXXXXX Description: Application Server Administration job failed for service instance Microsoft.Office.Server.Search.Administration.SearchServiceInstance (36a9b7ef-59aa-4f94-8887-8bf7b56f2f91). Reason: Error during encryption or decryption. System error code 0. Techinal Support Details: System.ArgumentException: Error during encryption or decryption. System error code 0. at Microsoft.Office.Server.Search.Administration.SearchServiceInstance.SynchronizeDefaultContentSource(IDictionary applications) at Microsoft.Office.Server.Search.Administration.SearchServiceInstance.Synchronize() at Microsoft.Office.Server.Administration.ApplicationServerJob.ProvisionLocalSharedServiceInstances(Boolean isAdministrationServiceJob) For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp. The SharePoint site appears to be functioning normally and Search returns expected results. Any suggestions would be appreciated

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  • COMPAQ Tower No Signal to monitor

    - by Lancelot
    Hi there, I have had some troubles with this: I received a compaq tower: Compaq Presario SR1224NX Onboard VGA Windows XP SP2 from a friend. It was given to me on condition i give her the files back. My plan was to turn this into an Ubuntu Server. It booted up no problems even with the ubuntu live disc. After a normal shutdown(not unpluggin the power cord and not doing a hard shutdown with the power button), it would not restart even after SEVERAL attempts. I realized the light next to the power supply would flash very rapidly. I researched and found out it was one of two things: a dead power supply or the cables to the motherboard and to the disks etc. Thus i checked to ensure the cables were fine(and they were). I purchased a Power Supply (this one has 400 watts, the initial had 250) and installed it. The tower now boots. It booted into the live disk and everything. After a normal shutdown, it now restarts but is not sending signal to my monitor. I have tried several monitors in which i assure work perfectly but not with this tower(i recall it did show display after replacing the power supply). The monitors are ACER. This is different than most "no Signal" problems since i am not using an external Video Card, this is onboard VGA. Thanks!

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  • COMPAQ Tower No Signal to monitor

    - by Lancelot
    I received a Compaq tower: Compaq Presario SR1224NX Onboard VGA Windows XP SP2 from a friend. My plan was to turn this into an Ubuntu Server. It booted up with no problems even with the Ubuntu live disc. After a normal shutdown (not unplugging the power cord and not doing a hard shutdown with the power button), it would not restart even after SEVERAL attempts. I realized the light next to the power supply would flash very rapidly. I researched and found out it was one of two things: a dead power supply or the cables to the motherboard and to the disks might be faulty, etc. Thus, I checked to ensure the cables were fine(and they were). I purchased a Power Supply (this one has 400 watts, the initial had 250) and installed it. The tower was able to boot into the live disk and everything. After a normal shutdown, it now restarts but is not sending signal to my monitor. I have tried several monitors in which I know work perfectly but not with this tower (I recall that it did show display after replacing the power supply). The monitors are ACER. This is different than most "no Signal" problems since I am not using an external Video Card, this is onboard VGA.

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  • How do I use constructor dependency injection to supply Models from a collection to their ViewModels

    - by GraemeF
    I'm using constructor dependency injection in my WPF application and I keep running into the following pattern, so would like to get other people's opinion on it and hear about alternative solutions. The goal is to wire up a hierarchy of ViewModels to a similar hierarchy of Models, so that the responsibility for presenting the information in each model lies with its own ViewModel implementation. (The pattern also crops up under other circumstances but MVVM should make for a good example.) Here's a simplified example. Given that I have a model that has a collection of further models: public interface IPerson { IEnumerable<IAddress> Addresses { get; } } public interface IAddress { } I would like to mirror this hierarchy in the ViewModels so that I can bind a ListBox (or whatever) to a collection in the Person ViewModel: public interface IPersonViewModel { ObservableCollection<IAddressViewModel> Addresses { get; } void Initialize(); } public interface IAddressViewModel { } The child ViewModel needs to present the information from the child Model, so it's injected via the constructor: public class AddressViewModel : IAddressViewModel { private readonly IAddress _address; public AddressViewModel(IAddress address) { _address = address; } } The question is, what is the best way to supply the child Model to the corresponding child ViewModel? The example is trivial, but in a typical real case the ViewModels have more dependencies - each of which has its own dependencies (and so on). I'm using Unity 1.2 (although I think the question is relevant across the other IoC containers), and I am using Caliburn's view strategies to automatically find and wire up the appropriate View to a ViewModel. Here is my current solution: The parent ViewModel needs to create a child ViewModel for each child Model, so it has a factory method added to its constructor which it uses during initialization: public class PersonViewModel : IPersonViewModel { private readonly Func<IAddress, IAddressViewModel> _addressViewModelFactory; private readonly IPerson _person; public PersonViewModel(IPerson person, Func<IAddress, IAddressViewModel> addressViewModelFactory) { _addressViewModelFactory = addressViewModelFactory; _person = person; Addresses = new ObservableCollection<IAddressViewModel>(); } public ObservableCollection<IAddressViewModel> Addresses { get; private set; } public void Initialize() { foreach (IAddress address in _person.Addresses) Addresses.Add(_addressViewModelFactory(address)); } } A factory method that satisfies the Func<IAddress, IAddressViewModel> interface is registered with the main UnityContainer. The factory method uses a child container to register the IAddress dependency that is required by the ViewModel and then resolves the child ViewModel: public class Factory { private readonly IUnityContainer _container; public Factory(IUnityContainer container) { _container = container; } public void RegisterStuff() { _container.RegisterInstance<Func<IAddress, IAddressViewModel>>(CreateAddressViewModel); } private IAddressViewModel CreateAddressViewModel(IAddress model) { IUnityContainer childContainer = _container.CreateChildContainer(); childContainer.RegisterInstance(model); return childContainer.Resolve<IAddressViewModel>(); } } Now, when the PersonViewModel is initialized, it loops through each Address in the Model and calls CreateAddressViewModel() (which was injected via the Func<IAddress, IAddressViewModel> argument). CreateAddressViewModel() creates a temporary child container and registers the IAddress model so that when it resolves the IAddressViewModel from the child container the AddressViewModel gets the correct instance injected via its constructor. This seems to be a good solution to me as the dependencies of the ViewModels are very clear and they are easily testable and unaware of the IoC container. On the other hand, performance is OK but not great as a lot of temporary child containers can be created. Also I end up with a lot of very similar factory methods. Is this the best way to inject the child Models into the child ViewModels with Unity? Is there a better (or faster) way to do it in other IoC containers, e.g. Autofac? How would this problem be tackled with MEF, given that it is not a traditional IoC container but is still used to compose objects?

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  • UK SQL Server User Group Event (May)

    Our very own Darren Green is speaking at a UK user group event in Cambridge (UK) on 20.05.2009.  He will be speaking on Integration Services.  Peter Blackburn will also be there and what he doesn’t know about SSRS isn’t worth knowing.  It promises to be a good night.  We would love to see as many people there as possible so head over to the UK User Group site and register. Register Here

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  • SQLAuthority News – First SQL Bangalore Event Report – Nov 24, 2012 – SQL Server User Group Bangalore

    - by pinaldave
    A very common question I often receive - Do we have SQL Server User Group in Bangalore? Yes! SQL Bangalore – we had very first meeting on Nov 24, 2012 and very soon we are going to have another User Group meeting. The goal is to keep up a monthly rhythm of User Group meeting. If you are in Bangalore area please join the Facebook page and you will keep on getting regular update about SQL Server. In the very first meeting we have five 30 minute session and had a fantastic time. We had the best of the best speakers presenting all the five sessions. The event was inaugurated by Vinod Kumar M by presenting on T-SQL Pitfalls. His excellent and eye-opening session was followed by Manas Dash. He enlightened everybody with functions introduced in SQL Server 2012. We had a surprise guest from Mumbai – Raj Chaodhary. If you know him he has a very interesting way to present sessions and he presented on SQL Joins. His hard to follow act was followed by Sudeepta who presented on Contained Database. This subject is quite entertaining and interesting. My session was last in order and I was eagerly waiting to present. I had decided to do something new this time so I had created around 52 slides and two demos. I was committed to go over all the 52 slides and both of the demos in 25 minutes of the time. I had interesting story as well. Though, I was a bit nervous I was able to go over a complete slide deck and demo in 25 minutes of the time I had. We also were very fortunate to have international guest Lynn Langit from USA present at the event as well. She presented an overview of the Big Data in very little time – something not everyone can do it efficiently. We are very thankful to our sponsor Pluralsight for awarding USD 300 worth Annual Subscription. It was the most awaited moment of the day. Well, overall we had a great fun with 100+ attendees learning SQL Server. Reference: Pinal Dave (http://blog.sqlauthority.com) Filed under: PostADay, SQL, SQL Authority, SQL Query, SQL Server, SQL Tips and Tricks, SQLAuthority News, T SQL, Technology

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  • Travelling MVP #3: Community event in Varna, Bulgaria

    - by DigiMortal
    Second stop in my DevReach 2012 trip was at Varna. We had not much time to hang around there but this problem will get fixed next year if not before. But still we had sessions there with Dimitar Georgijev and I had also chance to meet local techies. Next time we will have more tech and beers for sure! We started in the morning from Bucharest and travelled through Ruse, Razgrad and Shumen to Varna. It’s about 275km. We used cab, local bus and Dimitar father’s car. We had one food stop in Ruse and after that we went directly to Varna. Here is our route on map. Varna is Bulgarian city that locates on western coast of Black Sea. I have been there once before this trip and it’s good place to have vacation under sun. Also autumn is there milder than here in Estonia (third day of snow is going on). Bulgaria has some good beers, my favorite mankind killer called rakia and very good national cuisine. Food is made of fresh stuff and it is damn good experience. Here are some arbitrarily selected images (you can click on these to view at original size): Old bus “monument” in Razgrad Stuffed peppers, Bulgarian national cuisine Infra-red community having good time and beers We made our sessions at one study class of Varna technical university. It’s a little bit old style university but everything we needed was there and we had no problems with machinery. Sessions were same as in Bucharest. The user group in Varna is brand new and hopefully it will be something bigger one good day. At least I try to make my commits so they get on their feet quicker. As we had not much time to announce the event there was about 15 guys listening to us and I’m happy that it was not too much hyped event because still I was getting my first experiences with foreign audiences. After sessions we took our stuff to hotel and went to hang around with local techies. We had some good time there and made some new friends. Next time when I go to Varna I go back as more experienced speaker and I plan to do there one tougher and highly challenging session. Maybe somebody from Estonian community will join me and then it will be well planned surprise-attack to Varna :)

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  • July SQL Server UG Event in Manchester

    I will be speaking at the SQL Server UK User Group event in Manchester on 16.07.2009.  I am going to be talking about data mining again and how it isn’t all statistics and people with PhDs from Oxford.  Come join me and the excellent Chris Testa-O’Neill.  More details and registration can be found here

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