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• ADODB Connection String: Workgroup Information file is Missing?

  - by Mohgeroth

  I have a few data sources in access that I need to connect to programatically to do things with behind the scenes and keep visibility away from users. Said datasource has a password 'pass' as I'm going to call it here. Using this connection method I get an error attempting to use the open method Dim conn as ADODB.Connection Set ROBBERS.conn = New ADODB.Connection conn.open "Provider=Microsoft.Jet.OLEDB.4.0;" _ & "Data Source=\\pep-home\projects\billing\autobilling\DPBilling2.mdb;" _ & "Jet OLEDB:Database Password=pass;", "admin", "pass" "Cannot start your application. The workgroup information file is missing or opened exclusively by another user." Due to planning to move into 2007, we are not using nor have ever used a workgroup identification file through access. The database password on the data source was set through the Set Databa Password which had to be done on an exclusive open. Ive spent a good while changing around my connection options, where to put the passwords etc and either cannot find the right format, or (why I'm asking here) I think there may be some other unknown that I must setup to do this. Anyone out there got some useful information?

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• How to hide check all, clear all checkbox

  - by Kalpana

  I am having check box in the column header. The function of this is to check or uncheck all the check boxes in that column.If the row check box is checked and say delete, that row can be deleted from the dataTable. If the row object is used in some other table as a foreign key i put '-' in that row instead of check box which indicates that row cannot be deletable. In these cases if all the row has '-" , there is no need to have the header check box. How to programatically hide this 'Check All | Clear All' check box, if there is nothing to be removed. It would be even preferable to hide the 'Remove' button if there is no selection to be made. What are the best practices to address the above scenario. I have attached the javascript which I am using. <script type="text/javascript"> var tableId = '#user\\:userList'; jQuery(document).ready(function() { jQuery('#selectAll').click(function() { jQuery(tableId).find("input[type='checkbox']").attr('checked', jQuery('#selectAll').is(':checked')); }); }); </script>

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• Create ABPerson Records in a Shared CardDAV (10.6/Server Hosted) AddressBook

  - by Woodster

  Hello, My app presently reads and writes to the local Mac OS X 10.6 client addressbook using the AddressBook.framework. It works fine. 10.6 Server introduced AddressBook Server, which 10.6 clients can connect to by setting up a CardDAV Account. User and Group records can be stored in that account, which is synchronized to the 10.6 server and made available to other clients who access the same CardDAV account. Mail.app is able to autocomplete the email addresses from accounts that are in the local datastore as well as the remote CardDAV datastore. ABPeoplePicker can see both. But, programatically, I'm not getting any CardDAV-based data returned from my queries against the shared AddressBook. I'm not sure if I need to ask it for a different AddressBook, or if I need to modify my fetch-request to indicate that I want it to be able to use the shared data too. My goal is to adapt the current code so that it can read/write to the CardDAV account too, instead of just the local addressbook. Thoughts?

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• Changing App.config at Runtime

  - by born to hula

  I'm writing a test winforms / C# / .NET 3.5 application for the system we're developing and we fell in the need to switch between .config files at runtime, but this is turning out to be a nightmare. Here's the scene: the Winforms application is aimed at testing a WebApp, divided into 5 subsystems. The test proccess works with messages being sent between the subsystems, and for this proccess to be sucessful each subsystem got to have its own .config file. For my Test Application I wrote 5 separate configuration files. I wish I was able to switch between these 5 files during runtime, but the problem is: I can programatically edit the application .config file inumerous times, but these changes will only take effect once. I've been searching a long time for a form to address this problem but I still wasn't sucessful. I know the problem definition may be a bit confusing but I would really appreciate it if someone helped me. Thanks in advance! --- UPDATE 01-06-10 --- There's something I didn't mention before. Originally, our system is a Web Application with WCF calls between each subsystem. For performance testing reasons (we're using ANTS 4), we had to create a local copy of the assemblies and reference them from the test project. It may sound a bit wrong, but we couldn't find a satisfying way to measure performance of a remote application. --- End Update --- Here's what I'm doing: public void UpdateAppSettings(string key, string value) { XmlDocument xmlDoc = new XmlDocument(); xmlDoc.Load(AppDomain.CurrentDomain.SetupInformation.ConfigurationFile); foreach (XmlElement item in xmlDoc.DocumentElement) { foreach (XmlNode node in item.ChildNodes) { if (node.Name == key) { node.Attributes[0].Value = value; break; } } } xmlDoc.Save(AppDomain.CurrentDomain.SetupInformation.ConfigurationFile); System.Configuration.ConfigurationManager.RefreshSection("section/subSection"); }

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• Nav Controller, UITableViewController, UITextField to become firstResponder?

  - by Daniel Granger

  I have a core data application which uses a navigation controller to drill down to a detail view and then if you edit one of the rows of data in the detail view you get taken to an Edit View for the that single line, like in Apples CoreDataBooks example! The edit view is a UITableviewController which creates its table with a single section single row and a UITextfield in the cell, programatically. What I want to happen is when you select a row to edit and the edit view is pushed onto the nav stack and the edit view is animated moving across the screen, I want the textfield to be selected as firstResponder so that the keyboard is already showing as the view moves across the screen to take position. Like in the Contacts app or in the CoreDataBooks App. I currently have the following code in my app which causes the view to load and then you see the keyboard appear (which isn't what I want, I want the keyboard to already be there) - (void)viewDidAppear:(BOOL)animated { [super viewDidAppear:animated]; [theTextField becomeFirstResponder]; } You can't put this in -viewWillAppear as the textfield hasn't been created yet so theTextField is nil. In the CoreDataBooks App where they achieve what i want they load there tableview from a nib so they use the same code but in -viewWillAppear as the textfield has already been created! Is there anyway of getting around this without creating a nib, I want to keep the implementation programatic to enable greater flexibility. Many Thanks

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• How can I pass more than one command line argument via c#

  - by user293392

  I need to pass more than one command line argument via c# for a process called handle.exe: http://www.google.com.mt/search?sourceid=chrome&ie=UTF-8&q=handle.exe First, I need to run the executable file via ADMINISTRATOR permissions. This post has helped me achieve just that: http://stackoverflow.com/questions/667381/programatically-run-cmd-exe-as-adminstrator-in-vista-c But then comes the next problem of calling the actual line arguments such as "-p explore" How can I specify the command line arguments together, or maybe consecutively? Current code is as follows: Process p = new Process(); ProcessStartInfo processStartInfo = new ProcessStartInfo("filePath"); processStartInfo.CreateNoWindow = true; processStartInfo.UseShellExecute = false; processStartInfo.RedirectStandardOutput = true; processStartInfo.RedirectStandardInput = true; processStartInfo.Verb = "runas"; processStartInfo.Arguments = "/env /user:" + "Administrator" + " cmd"; p.StartInfo = processStartInfo; p.Start(); string output = p.StandardOutput.ReadToEnd(); p.WaitForExit(); Console.WriteLine(output); Thanks

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• How can you change Network settings (IP Address, DNS, WINS, Host Name) with code in C#

  - by rathkopf

  I am developing a wizard for a machine that is to be used as a backup of other machines. When it replaces an existing machine, it needs to set its IP address, DNS, WINS, and host name to match the machine being replaced. Is there a library in .net (C#) which allows me to do this programatically? There are multiple NICs, each which need to be set individually. EDIT Thannk you TimothyP for your example. It got me moving on the right track and the quick reply was awesome. Thanks balexandre. Your code is perfect. I was in a rush and had already adapted the example TimothyP linked to, but I would have loved to have had your code sooner. I've also developed a routine using similar techniques for changing the computer name. I'll post it in the future so subscribe to this questions RSS feed if you want to be informed of the update. I may get it up later today or on Monday after a bit of cleanup.

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• Autoresize UIScrollView

  - by Sebastian

  I made a UIViewController, which programatically generates a UIScrollView. Everything's fine, but when I rotate the Device, the UIScollView should resize so it takes the complete width of my View. Is there a way to do that without rebuilding the complete UIScrollView ? Thx a lot ! Sebastian This is called in my viewDidLoad: -(void)buildmyScroller { myScroller = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 800, 768, 100)]; //...adding some subviews to myScroller thumbScroller.contentSize = CGSizeMake(3000, 100); [[self view] addSubview:myScroller]; } Then I tried to resize myScroller with this: -(void)changemyScroller { UIInterfaceOrientation interfaceOrientation = self.interfaceOrientation; if (interfaceOrientation == UIInterfaceOrientationPortrait) { [thumbScroller setFrame:CGRectMake(0, 805, 768, 150)]; } else if (interfaceOrientation == UIInterfaceOrientationPortraitUpsideDown){ thumbScroller.frame = CGRectMake(0, 805, 768, 150); } else if (interfaceOrientation == UIInterfaceOrientationLandscapeLeft){ thumbScroller.frame = CGRectMake(0, 549, 1024, 150); } else if (interfaceOrientation == UIInterfaceOrientationLandscapeRight){ thumbScroller.frame = CGRectMake(0, 549, 1024, 150); } } And called the method in didAnimateFirstHalf... cause I'm not shure where else to call it. Thx a lot again !!

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• ActiveX control loading but not activating correctly (only when using in Reg Free COM)

  - by embnut

  I have an ActiveX control (created using C#) that I am adding to a form in Visual FoxPro using late binding. It works without problems when I register the control. I want to use reg free COM and created necessary manifest files. Now it load and displays in an inactive state until I double click or programatically activate it. I don't think it has anything to do with the reg free com manifest files. However is there something I need to do to set it up before/after making the late binding call AddObject()? this.AddObject('OleControl1', 'oleControl', 'SomeCompany.SomeOleControl') When I check the OleTypeAllowed Property of the OleControl created by AddObject() it is 1 (Embedded OLE object) instead of -2 (ActiveX object). So the OleControl got instantiated to the wrong type. I also tried the following: DEFINE(d) a subclass of OleControl and set the property OleTypeAllowed = -2. Used late binding to load the control. It did not work as required. The OleTypeAllowed came back as 1 Registered the ActiveX control. Added the ActiveX control to the project as a subclass using the visual editor. Unregistered the control. Used late binding to load the control. It did not work as required. The OleTypeAllowed came back as 1. Is it possible to load the OleControl as a ActiveX control? Any input from VB that I can convert to FoxPro would also be appreciated.

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• LDAP Query with sub result

  - by StefanE

  I have been banging my head for quite a while with this and can't get it to work. I have a LDAP Query I do have working in AD Users and Computers but dont know how to do it programatically in C#. Here are my LDAP Query that works fine in the AD Tool: (memberOf=CN=AccRght,OU=Groups,OU=P,OU=Server,DC=mydomain,DC=com)(objectCategory=user)(objectClass=user)(l=City) I have used this code to get the user accounts to get members of CN=AccRght but I'm not succeeding on limiting users belonging to a specific city. public StringCollection GetGroupMembers(string strDomain, string strGroup) { StringCollection groupMemebers = new StringCollection(); try { DirectoryEntry ent = new DirectoryEntry("LDAP://DC=" + strDomain + ",DC=com"); DirectorySearcher srch = new DirectorySearcher("(CN=" + strGroup + ")"); SearchResultCollection coll = srch.FindAll(); foreach (SearchResult rs in coll) { ResultPropertyCollection resultPropColl = rs.Properties; foreach( Object memberColl in resultPropColl["member"]) { DirectoryEntry gpMemberEntry = new DirectoryEntry("LDAP://" + memberColl); System.DirectoryServices.PropertyCollection userProps = gpMemberEntry.Properties; object obVal = userProps["sAMAccountName"].Value; if (null != obVal) { groupMemebers.Add(obVal.ToString()); } } } } catch (Exception ex) { Console.Write(ex.Message); } return groupMemebers; } Thanks for any help!

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• Determine between files and folders using cURL

  - by ILMV

  I'm writing a script to download files from an FTP server using cURL + PHP, at the moment I am just trying to build a complete file structure, here's the code I'm using so far: <?php $curl = curl_init(); curl_setopt($curl, CURLOPT_URL, "ftp://www.example.com"); curl_setopt($curl, CURLOPT_USERPWD, "user:pwd"); curl_setopt ($curl, CURLOPT_RETURNTRANSFER, 1) ; curl_setopt($curl, CURLOPT_CUSTOMREQUEST, 'NLST'); // or curl_setopt($curl, CURLOPT_CUSTOMREQUEST, 'LIST -a'); $ftp=curl_exec($curl); $directory=split("[\n|\r]",$ftp); echo("<pre>".print_r($directory,true)."</pre>"); foreach($directory as $key=>$value) if($value=='') unset($directory[$key]); echo("<pre>".print_r($directory,true)."</pre>"); curl_close ($curl); ?> I can use either NLST or the LIST function, but what I want to do is programatically determine what are files and what are folders. Thanks!

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• detecting pauses in a spoken word audio file using pymad, pcm, vad, etc

  - by james

  First I am going to broadly state what I'm trying to do and ask for advice. Then I will explain my current approach and ask for answers to my current problems. Problem I have an MP3 file of a person speaking. I'd like to split it up into segments roughly corresponding to a sentence or phrase. (I'd do it manually, but we are talking hours of data.) If you have advice on how to do this programatically or for some existing utilities, I'd love to hear it. (I'm aware of voice activity detection and I've looked into it a bit, but I didn't see any freely available utilities.) Current Approach I thought the simplest thing would be to scan the MP3 at certain intervals and identify places where the average volume was below some threshold. Then I would use some existing utility to cut up the mp3 at those locations. I've been playing around with pymad and I believe that I've successfully extracted the PCM (pulse code modulation) data for each frame of the mp3. Now I am stuck because I can't really seem to wrap my head around how the PCM data translates to relative volume. I'm also aware of other complicating factors like multiple channels, big endian vs little, etc. Advice on how to map a group of pcm samples to relative volume would be key. Thanks!

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• Extend base type and automatically update audit information on Entity

  - by Nix

  I have an entity model that has audit information on every table (50+ tables) CreateDate CreateUser UpdateDate UpdateUser Currently we are programatically updating audit information. Ex: if(changed){ entity.UpdatedOn = DateTime.Now; entity.UpdatedBy = Environment.UserName; context.SaveChanges(); } But I am looking for a more automated solution. During save changes, if an entity is created/updated I would like to automatically update these fields before sending them to the database for storage. Any suggestion on how i could do this? I would prefer to not do any reflection, so using a text template is not out of the question. A solution has been proposed to override SaveChanges and do it there, but in order to achieve this i would either have to use reflection (in which I don't want to do ) or derive a base class. Assuming i go down this route how would I achieve this? For example EXAMPLE_DB_TABLE CODE NAME --Audit Tables CREATE_DATE CREATE_USER UPDATE_DATE UPDATE_USER And if i create a base class public abstract class IUpdatable{ public virtual DateTime CreateDate {set;} public virtual string CreateUser { set;} public virtual DateTime UpdateDate { set;} public virtual string UpdateUser { set;} } The end goal is to be able to do something like... public overrride void SaveChanges(){ //Go through state manager and update audit infromation //FOREACH changed entity in state manager if(entity is IUpdatable){ //If state is created... update create audit. //if state is updated... update update audit } } But I am not sure how I go about generating the code that would extend the interface.

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• record output sound in python

  - by aaronstacy

  i want to programatically record sound coming out of my laptop in python. i found PyAudio and came up with the following program that accomplishes the task: import pyaudio, wave, sys chunk = 1024 FORMAT = pyaudio.paInt16 CHANNELS = 1 RATE = 44100 RECORD_SECONDS = 5 WAVE_OUTPUT_FILENAME = sys.argv[1] p = pyaudio.PyAudio() channel_map = (0, 1) stream_info = pyaudio.PaMacCoreStreamInfo( flags = pyaudio.PaMacCoreStreamInfo.paMacCorePlayNice, channel_map = channel_map) stream = p.open(format = FORMAT, rate = RATE, input = True, input_host_api_specific_stream_info = stream_info, channels = CHANNELS) all = [] for i in range(0, RATE / chunk * RECORD_SECONDS): data = stream.read(chunk) all.append(data) stream.close() p.terminate() data = ''.join(all) wf = wave.open(WAVE_OUTPUT_FILENAME, 'wb') wf.setnchannels(CHANNELS) wf.setsampwidth(p.get_sample_size(FORMAT)) wf.setframerate(RATE) wf.writeframes(data) wf.close() the problem is i have to connect the headphone jack to the microphone jack. i tried replacing these lines: input = True, input_host_api_specific_stream_info = stream_info, with these: output = True, output_host_api_specific_stream_info = stream_info, but then i get this error: Traceback (most recent call last): File "./test.py", line 25, in data = stream.read(chunk) File "/Library/Python/2.5/site-packages/pyaudio.py", line 562, in read paCanNotReadFromAnOutputOnlyStream) IOError: [Errno Not input stream] -9975 is there a way to instantiate the PyAudio stream so that it inputs from the computer's output and i don't have to connect the headphone jack to the microphone? is there a better way to go about this? i'd prefer to stick w/ a python app and avoid cocoa.

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• GWT forced height HTMLPanel

  - by Nils

  Hello, I'm developing a GWT project, and I encountered a problematic cross-browsering problem. When using firefox, there are problems with the display of all the pages. I found the reason why : In UIBinder, each of my pages are wrapped by a "g:HTMLPanel" : at start and at the end of the xml file, to wrap the content of all the pages When doing this, the generated code of the panel goes like this : div style="width: 100%; height: 100%; .... The problem is that "height : 100%". If I remove it with firebug, the display is perfect. So my goal is to programatically remove that generated 100% height.. But no way to do it ! I tried everything : setHeight, setSize, working on the Element itself with getElement().methods()... I tried to do things like style.clear(), everything that could have a chance to work.. But in the generated code that "height: 100%" will ALWAYS be there. If I set it's height to "50%" or "50px" it has no effect at all. I even tried to give it an ID, then with pure javascript to change it's style, but no solution either.. Note : I'm sure that I'm working on the right element : adding a styleName, for example, works well. Any idea ? Your help would be really appreciated, I have no clue of how to remove this bit of generated code, and I've been looking for hours already :(:(:(:( Best regards, Nils

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• Core-data: when accessing a relationship, the count method on NSSet fails

  - by lordsandwich

  I'm trying to access a relationship (one to many) programatically. My Data model contains an NSManagedEntity called language (with a two string attributes) with a relationship to an entity called WordCategory (one-to-many). I use an NSFetchRequest to get all the Language entities. that works fine. I get the valueForKey for the relationship and that works fine. I can work with its objects. However, when I try to send the message count to the NSSet that stores the WordCategory objects I get a In other words, this line works: NSLog(@"word category count %@",[[wordCategory anyObject] valueForKey:@"name"]); This one doesn't: NSLog(@"word category count %@",[wordCategory count] I get a the message: EXC_BAD_ACCESS in the debugger. Here's the rest of the code: NSManagedObjectContext *moc = [myAppDelegate managedObjectContext]; NSFetchRequest *request = [[NSFetchRequest alloc] init]; [request setEntity:[NSEntityDescription entityForName:@"Language" inManagedObjectContext:moc]]; NSError *error = nil; NSArray *results = [moc executeFetchRequest:request error: &error]; if (error) { [NSApp presentError:error]; return; } NSManagedObject *obj = [results objectAtIndex:0]; NSSet *wordCategory = [obj valueForKey:@"category"]; NSLog(@"word category count %@",[wordCategory count]); I'll appreciate any light than anybody can shed in this mystery. Thanks for your help!

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• Programmatically Add Controls to WPF Form

  - by user210757

  I am trying to add controls to a UserControl dynamically (programatically). I get a generic List of objects from my Business Layer (retrieved from the database), and for each object, I want to add a Label, and a TextBox to the WPF UserControl and set the Position and widths to make look nice, and hopefully take advantage of the WPF Validation capabilities. This is something that would be easy in Windows Forms programming but I'm new to WPF. How do I do this (see comments for questions) Say this is my object: public class Field { public string Name { get; set; } public int Length { get; set; } public bool Required { get; set; } } Then in my WPF UserControl, I'm trying to create a Label and TextBox for each object: public void createControls() { List<Field> fields = businessObj.getFields(); Label label = null; TextBox textbox = null; foreach (Field field in fields) { label = new TextBox(); // HOW TO set text, x and y (margin), width, validation based upon object? // i have tried this without luck: // Binding b = new Binding("Name"); // BindingOperations.SetBinding(label, Label.ContentProperty, b); MyGrid.Children.Add(label); textbox = new TextBox(); // ??? MyGrid.Children.Add(textbox); } // databind? this.DataContext = fields; }

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• Can memory be cleaned up?

  - by Tom

  I am working in Delphi 5 (with FastMM installed) on a Win32 project, and have recently been trying to drastically reduce the memory usage in this application. So far, I have cut the usage nearly in half, but noticed something when working on a separate task. When I minimized the application, the memory usage shrunk from 45 megs down to 1 meg, which I attributed to it paging out to disk. When I restored it and restarted working, the memory went up only to 15 megs. As I continued working, the memory usage slowly went up again, and a minimize and restore flushed it back down to 15 megs. So to my thinking, when my code tells the system to release the memory, it is still being held on to according to Windows, and the actual garbage collection doesn't kick in until a lot later. Can anyone confirm/deny this sort of behavior? Is it possible to get the memory cleaned up programatically? If I keep using the program without doing this manual flush, I get an out of memory error after a while, and would like to eliminate that. Thanks.

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• Dynamic Column that contains a Repeater

  - by djbyter

  How would I go about doing this programatically? I can do this just fine declaratively, using a template column and then using something like this: ... <TemplateGridColumn> <ItemTemplate> <div> <asp:Image ID="groupImg" CssClass="groupImg" runat="server"/> <asp:Repeater ID="groupItemRpt" runat="server"> <HeaderTemplate> <ul class="groupItemList"> </HeaderTemplate> <ItemTemplate> <li> <asp:Image ID="itemImg" runat="server" /> <asp:HiddenField ID="itemValue" runat="server" /> </li> </ItemTemplate> <FooterTemplate> </ul> </FooterTemplate> </asp:Repeater> </div> </ItemTemplate> </TemplateGridColumn> ... I am dynamically creating this grid based on the data, so I'm already added columns with one set of controls. But now I need to figure out how to show multiple images, which expand/contract if the groupImg image control is clicked (i just toggle the ul) .. Can anyone point me in the right direction? Thanks.

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• Can't get SFTP to work in PHP

  - by Chris Kloberdanz

  I am writing a simple SFTP client in PHP because we have the need to programatically retrieve files via n remote servers. I am using the PECL SSH2 extension. I have run up against a road block, though. The documentation on php.net suggests that you can do this: $stream = fopen("ssh2.sftp://$sftp/path/to/file", 'r'); However, I have an ls method that attempts to something similar public function ls($dir) { $rd = "ssh2.sftp://{$this->sftp}/$dir"; $handle = opendir($rd); if (!is_resource($handle)) { throw new SFTPException("Could not open directory."); } while (false !== ($file = readdir($handle))) { if (substr($file, 0, 1) != '.'){ print $file . "\n"; } } closedir($handle); } I get the following error: PHP Warning: opendir(): Unable to open ssh2.sftp://Resource id #5/outgoing on remote host This makes perfect sense because that's what happens when you cast a resource to string. Is the documentation wrong? I tried replacing the resource with host, username, and host and that didn't work either. I know the path is correct because I can run SFTP from the command line and it works fine. Has anyone else tried to use the SSH2 extenstion with SFTP? Am I missing something obvious here? UPDATE: I setup sftp on another machine in-house and it works just fine. So, there must be something about the server I am trying to connect to that isn't working.

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• Marquee in various TextView at the same time?

  - by YaW

  Hi, I have a dinamic layout wich has one to six TextViews. All the TextViews are created in the Activity (programatically) and all are created equally. I want to marquee the text in the TextViews, but I don't know how to do it. Apparently, the TextView needs to be focused for the marquee works fine, but how i focus six TextViews at the same time? I think that's not possible, so, is there any workaround? Is it possible to get the marquee working without having the focus? This is the code of the TextViews: //TextView TextView tvTitulo = new TextView(this); tvTitulo.setText("Some loooooooooooooooooooooong text"); tvTitulo.setTypeface(null, Typeface.BOLD); //Marquee tvTitulo.setSingleLine(); tvTitulo.setEllipsize(TruncateAt.MARQUEE); tvTitulo.setHorizontallyScrolling(true); tvTitulo.setFocusableInTouchMode(true); If I remove the line tvTitulo.setFocusableInTouchMode(true); the marquee is not working at all. If I don't remove the line, only one of the TextViews is getting the marquee working. Greetings

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• Programatic re-evalutation of MVVM command's "can execute" state

  - by dzs

  Hello! I'm writing a WPF application using the MVVM pattern, based on the following article: WPF Apps With The Model-View-ViewModel Design Pattern I have two buttons on my View with the buttons' "Command" property bound (with data binding) to a given instance of the RelayCommand class (see "Figure 3 The RelayCommand Class" from the article above). The RelayCommand class has support for checking whether the given command can be executed. WPF automatically disables buttons whose command cannot be executed. Each of my commands (in the ViewModel class) start a background operation, and the command cannot be executed again until the background operation is finished. The RelayCommand instances have information whether the background operation is still working or it is finished. My problem is the following: after pressing the any of the buttons, the buttons automaticaly go disabled (which is OK) because the background operation started and the command cannot be executed until it is finished, but after the operation had finished, the buttons don't go enabled automatically because their command's "can be executed" predicate is not automatically reevaluated. The reevaluation can be manually triggered by having the application loose and regain focus (by pressing ALT+TAB). After doing this trick, the buttons get enabled once again. How can I programatically reevaluate the buttons' command's "can execute" state?

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• Problem with JMX query of Coherence node MBeans visible in JConsole

  - by Quinn Taylor

  I'm using JMX to build a custom tool for monitoring remote Coherence clusters at work. I'm able to connect just fine and query MBeans directly, and I've acquired nearly all the information I need. However, I've run into a snag when trying to query MBeans for specific caches within a cluster, which is where I can find stats about total number of gets/puts, average time for each, etc. The MBeans I'm trying to access programatically are visible when I connect to the remote process using JConsole, and have names like this: Coherence:type=Cache,service=SequenceQueue,name=SEQ%GENERATOR,nodeId=1,tier=back It would make it more flexible if I can dynamically grab all type=Cache MBeans for a particular node ID without specifying all the caches. I'm trying to query them like this: QueryExp specifiedNodeId = Query.eq(Query.attr("nodeId"), Query.value(nodeId)); QueryExp typeIsCache = Query.eq(Query.attr("type"), Query.value("Cache")); QueryExp cacheNodes = Query.and(specifiedNodeId, typeIsCache); ObjectName coherence = new ObjectName("Coherence:*"); Set<ObjectName> cacheMBeans = mBeanServer.queryMBeans(coherence, cacheNodes); However, regardless of whether I use queryMBeans() or queryNames(), the query returns a Set containing... ...0 objects if I pass the arguments shown above ...0 objects if I pass null for the first argument ...all MBeans in the Coherence:* domain (112) if I pass null for the second argument ...every single MBean (128) if I pass null for both arguments The first two results are the unexpected ones, and suggest a problem in the QueryExp I'm passing, but I can't figure out what the problem is. I even tried just passing typeIsCache or specifiedNodeId for the second parameter (with either coherence or null as the first parameter) and I always get 0 results. I'm pretty green with JMX — any insight on what the problem is? (FYI, the monitoring tool will be run on Java 5, so things like JMX 2.0 won't help me at this point.)

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• Multiple dynamic timers

  - by Rickard

  I am working on a project where I need to let the user create one (or more) timers to fire off an event. The user is supposed to define variables such as if the timer should be active and how often the timer will fire along with some other variables of what will happen when the timer is fiering. All these variables are stored in a dictionary (Disctionary) where the object holds all the variables the user has set and the string is the name that the user has chosen for this timer. I then want my program to loop through this dictionary and search for all objects which has the variable t_Active set to true (this I have already achieved). What I need help with figuring out is the follwoing: When it detects the variable, and if it's set to true, I need the program to see if there is already a timer created for this. If it isn't, it should create one and set the relevant parameters for the timer. The two variables t_num and t_period should decide the interval of the timer. t_num is an int and t_period is a string which will be set to either minutes, hours or days. Combining t_num with 60000 (minutes), 3600000 (hours) or 86400000 should give the corrct interval. But how would I go on about programatically create a timer for each user-defined active object? And how do I get the program to detect wether or not a timer has already been created? I have been searching both here and on google, but so far I haven't come across something that makes sense to me. I am still learning C#, so what make sense to you guys may not neccessarilly make sense to me yet. :) I hope I have explaned what I need good enough, please do ask me to clarify if you don't get me. Edit: Maybe I should also mention that the mentioned dictionary will also be saved to an XML file to that the user can pick up all the settings they made at any time.

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• Android custom xml widget

  - by DrogoNevets

  I have an XML file in my layout folder that has how i want my custom widget/view (not sure what correct terminology is here). but how do i make it so that i can programatically, add one or more to an activity the xml file is as follows <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="wrap_content" android:id="@+id/viewLog"> <TextView android:id="@+id/viewLogClimbName" android:layout_width="fill_parent" android:singleLine="true" android:ellipsize="end" android:gravity="left" /> <LinearLayout android:orientation="horizontal" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_weight="1"> <LinearLayout android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="wrap_content"> <TextView android:id="@+id/viewLogDate" android:layout_width="fill_parent" android:singleLine="true" android:ellipsize="end" android:gravity="left" /> <TextView android:id="@+id/viewLogStyle" android:layout_width="fill_parent" android:singleLine="true" android:ellipsize="end" android:gravity="left" /> </LinearLayout> <TextView android:id="@+id/viewLogDetails" android:layout_width="fill_parent" android:layout_height="fill_parent" android:ellipsize="end" android:gravity="left" android:layout_weight="1" /> </LinearLayout> </LinearLayout> I have looked at the android how-to and dont really understand what its getting at

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