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  • Large file upload into WSS v3

    - by Rubens Farias
    I'd built an WSSv3 application which upload files in small chunks; when every data piece arrives, I temporarly keep it into a SQL 2005 image data type field for performance reasons**. Problem come when upload ends; I need to move data from my SQL Server to Sharepoint Document Library through WSSv3 object model. Right now, I can think two approaches: SPFileCollection.Add(string, (byte[])reader[0]); // OutOfMemoryException and SPFile file = folder.Files.Add("filename", new byte[]{ }); using(Stream stream = file.OpenBinaryStream()) { // ... init vars and stuff ... while ((bytes = reader.GetBytes(0, offset, buffer, 0, BUFFER_SIZE)) 0) { stream.Write(buffer, 0, (int)bytes); // Timeout issues } file.SaveBinary(stream); } Are there any other way to complete successfully this task? ** Performance reasons: if you tries to write every chunk directly at Sharepoint, you'll note a performance degradation as file grows up (100Mb).

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  • Reading from compressed lucene index

    - by Akhil
    I created a lucene index and compressed the index directory with bz2 or zip. I donot want to uncompress it. Is there any API call that can read the index from this zipped directory and thus allow searching and other functionalities. That is, can lucence IndexReader read the index from a compressed file. I saw that Lucnene IndexReader does not support "Reader" to open the index, otherwise I would have created a Reader class that uncompresses the file and streams the uncompressed version. Any alternatives to this are welcome. Thanks, Akhil

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  • WinForm PDF viewer with programatic search functionality

    - by Anthony Shaw
    We are currently using PDFTron's PDFView WinForm control to view PDF's in a WinForm application. I can load the file and search the file to highlight a certain text value. We have run into an issue where we have expired our trial license period and do not wish to shell out the $900/seat licensing on 15-20 computers. Does anybody know if the ActiveX Adobe Reader control can support the searching functionality programatically? I've tried that and the FoxIt Reader OCX control and neither seem to have this feature exposed (unless it's hidden really well) Does anybody have any suggestions for other freeware/open source viewers, or less-expensive viewers? TIA!

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  • How to extract digg data by digg api

    - by vamsivanka
    I am trying to extract digg data for a user using this url "http://services.digg.com/user/vamsivanka/diggs?count=25&appkey=34asd56asdf789as87df65s4fas6" and the web response is throwing an error "The remote server returned an error: (403) Forbidden." Please let me know. public static XmlTextReader CreateWebRequest(string url) { HttpWebRequest webRequest = (HttpWebRequest)WebRequest.Create(url); webRequest.UserAgent = ".NET Framework digg Test Client"; webRequest.Credentials = System.Net.CredentialCache.DefaultCredentials; webRequest.Accept = "text/xml"; HttpWebResponse webResponse = (HttpWebResponse)webRequest.GetResponse(); System.IO.Stream responseStream = webResponse.GetResponseStream(); XmlTextReader reader = new XmlTextReader(responseStream); return reader; }

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  • Using statement question

    - by Dan
    I have two questions. 1) Should you always use a using statement on a connection? So, I would use it on the connection and then another one on a reader within the connection? So I would be using two using statements. 2) Lets say you use the using statement on the connection and also a reader being returned on the connection. So you have two using statements. Does it create two Try{}Finally{} blocks or just one? Thanks!

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  • Looking for efficient scaling patterns for Silverlight application with distributed text-file data s

    - by Edward Tanguay
    I'm designing a Silverlight software solution for students and teachers to record flashcards, e.g. words and phrases that students find while reading and errors that teachers notice while teaching. Requirements are: each person publishes his own flashcards in a file on a web server, e.g. http://:www.mywebserver.com/flashcards.txt other people subscribe to that person's flashcards by using a Silverlight flashcard reader that I have developed and entering the URLs of flashcard files they want to subscribe to, URLs and imported flashcards being saved in IsolatedStorage the flashcards.txt file has the following simple format: title, then blocks of question/answers: Jim Smith's flashcards from English class 53-222, winter semester 2009 ==fla Das kann nicht sein. That can't be. ==fla Es sei denn, er kommt nicht. Unless he doesn't come. The user then makes public the URL to his flashcard file and other readers begin reading in his flashcards. In order to lower the bar for non-technical users to contribute, it will even be possible for them to save this text in a Google Document, which they publish and distribute the URL. The flashcard readers will then recognize it is a google document and perform the necessary screen scraping to get at the raw text. I have two technical questions about this approach: What is a best way to plan now for scalability issues: e.g. if your reader is subscribed to 10 flashcard files that are each 200K, it will have to download 2MB of text just to find out if any new flashcards are available. Or can I somehow accurately and consistently get at the last update date/time of text files on servers and published google docs? Each reader will have the ability to allow the person to test himself on imported flashcards and add meta information to them, e.g. categorize them, edit them, etc. This information will be stored in IsolatedStorage along with the important flashcards themselves. What is a good pattern to allow these readers to share and synchronize this meta data, e.g. so when you are looking at a flashcard you can see that 5 other people have made corrections to it. The best solution I can think of now is that the Silverlight readers will have to republish their data to a central database, but then there is the problem of uniquely identifying each flashcard, the best approach seems to be URL + position-in-file, or even better URL + original text of both question and answer fields, but both of these have their obvious drawbacks. The main requirement is that the bar for participation is kept as low as possible, i.e. type text in a google document, publish it, distribute the URL, and you're publishing within the flashcard community. So I want to come up with the most efficient technical solutions in order to compensate for the lack of database, lack of unique ids, etc. For those who have designed or developed similar non-traditional, distributed database projects like this, what advice, experience or best-practice tips you can share on the above two points?

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  • Add columns to a datatable in c#?

    - by Pandiya Chendur
    I have a csv reader class that reads a .csv file and its values.... I have created datatable out of it... Consider my Datatable contains three header columns Name,EmailId,PhoneNo.... The values have been added successfully.... Now i want to add two columns IsDeleted,CreatedDate to this datatable... I have tried this but it doesn't seem to work, foreach (string strHeader in headers) { dt.Columns.Add(strHeader); } string[] data; while ((data = reader.GetCSVLine()) != null) { dt.Rows.Add(data); } dt.Columns.Add("IsDeleted", typeof(byte)); dt.Columns.Add(new DataColumn("CreatedDate", typeof(DateTime))); foreach (DataRow dr in dt.Rows) { dr["IsDeleted"] = Convert.ToByte(0); dr["CreatedDate"] = Convert.ToDateTime(System.DateTime.Now.ToString()); dt.Rows.Add(dr); } When i try to add isdeleted values an error saying This row already belongs to this table. ....

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  • if (condition) continue; OR if (!condition) { ... }? (style preference)

    - by Hosam Aly
    I know this is a matter of style, hence the subjective tag. I have a small piece of code, with two nested conditions. I could code it in two ways, and I'd like to see how more experienced developers think it should look like. Style 1: while (!String.IsNullOrEmpty(msg = reader.readMsg())) { RaiseMessageReceived(); if (parseMsg) { ParsedMsg parsedMsg = parser.parseMsg(msg); RaiseMessageParsed(); if (processMsg) { process(parsedMsg); RaiseMessageProcessed(); } } } Style 2: while (!String.IsNullOrEmpty(msg = reader.readMsg())) { RaiseMessageReceived(); if (!parseMsg) continue; ParsedMsg parsedMsg = parser.parseMsg(msg); RaiseMessageParsed(); if (!processMsg) continue; process(parsedMsg); RaiseMessageProcessed(); } (Side question: how do I put empty lines in the source code sample?)

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  • Reading SAML Attributes from SAML Token

    - by Shani
    I am loading SAML Token from XML file. string certificatePath = @"D:\Projects\SAMLDemo\Server.pfx"; X509Certificate2 cert = new X509Certificate2(certificatePath, "shani"); string samlFilePath = @"D:\Projects\SAMLDemo\saml.xml"; XmlReader reader = XmlReader.Create(samlFilePath); List<SecurityToken> tokens = new List<SecurityToken>(); tokens.Add(new X509SecurityToken(cert)); SecurityTokenResolver outOfBandTokenResolver = SecurityTokenResolver.CreateDefaultSecurityTokenResolver(new ReadOnlyCollection<SecurityToken>(tokens), true); SecurityToken securityToken = WSSecurityTokenSerializer.DefaultInstance.ReadToken(reader, outOfBandTokenResolver); SamlSecurityToken deserializedSaml = securityToken as SamlSecurityToken; How can I read the SAML attributes from deserializedSaml ? I need string values for the attributes.

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  • Rx: Piecing together multiple IObservable web requests

    - by McLovin
    Hello, I'm creating multiple asynchronous web requests using IObservables and reactive extensions. So this creates observable for "GET" web request: var tweetObservalue = from request in WebRequestExtensions.CreateWebRequest(outUrl + querystring, method) from response in request.GetResponseAsync() let responseStream = response.GetResponseStream() let reader = new StreamReader(responseStream) select reader.ReadToEnd(); And I can do tweetObservable.Subscribe(response => dosomethingwithresponse(response)); What is the correct way of executing multiple asynchronous web requests with IObservables and LINQ that have to wait until other requests have been finished? For example first I would like to verify user info: create userInfoObservable, then if user info is correct I want to update stats so I get updateStatusObservable then if status is updated I would like create friendshipObservable and so on. Also bonus question, there is a case where I would like to execute web calls simultaneously and when all are finished execute another observable which will until other calls are finished. Thank you.

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  • C# XMLSerializer fails with List<T>

    - by Redshirt
    Help... I'm using a singleton class to save all my settings info. It's first utilized by calling Settings.ValidateSettings(@"C:\MyApp") The problem I'm having is that 'List Contacts' is causing the xmlserializer to fail to write the settings file, or to load said settings. If I comment out the List then I have no problems saving/loading the xml file. What am I doing wrong... Thanks in advance // The actual settings to save public class MyAppSettings { public bool FirstLoad { get; set; } public string VehicleFolderName { get; set; } public string ContactFolderName { get; set; } public List<ContactInfo> Contacts { get { if (contacts == null) contacts = new List<ContactInfo>(); return contacts; } set { contacts = value; } } private List<ContactInfo> contacts; } // The class in which the settings are manipulated public static class Settings { public static string SettingPath; private static MyAppSettings instance; public static MyAppSettings Instance { get { if (instance == null) instance = new MyAppSettings(); return instance; } set { instance = value; } } public static void InitializeSettings(string path) { SettingPath = Path.GetFullPath(path + "\\MyApp.xml"); if (File.Exists(SettingPath)) { LoadSettings(); } else { Instance.FirstLoad = true; Instance.VehicleFolderName = "Cars"; Instance.ContactFolderName = "Contacts"; SaveSettingsFile(); } } // load the settings from the xml file private static void LoadSettings() { XmlSerializer ser = new XmlSerializer(typeof(MyAppSettings)); TextReader reader = new StreamReader(SettingPath); Instance = (MyAppSettings)ser.Deserialize(reader); reader.Close(); } // Save the settings to the xml file public static void SaveSettingsFile() { XmlSerializer ser = new XmlSerializer(typeof(MyAppSettings)); TextWriter writer = new StreamWriter(SettingPath); ser.Serialize(writer, Settings.Instance); writer.Close(); } public static bool ValidateSettings(string initialFolder) { try { Settings.InitializeSettings(initialFolder); } catch (Exception e) { return false; } // Do some validation logic here return true; } } // A utility class to contain each contact detail public class ContactInfo { public string ContactID; public string Name; public string PhoneNumber; public string Details; public bool Active; public int SortOrder; } }

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  • USB interface barcode scanners

    - by Nimbuz
    Not exactly a programming question, but close. I'll try my luck anyway. The keyboard wedge barcode scanner inserts the translation device between the reader and the keyboard. Data sent through a wedge appears as if it was typed into the computer, while the keyboard itself remains fully functional. Because a computer using a keyboard wedge can't tell the difference between data that is entered by a scanning device, or data that is entered by keyboard typing, a wedge can be used to easily add barcode reading capability to an existing computer without modifying software applications. I'd like to know if all USB interface barcode scanners automatically translate digital signals from a barcode reader into keyboard strokes for a applications just like wedge or is USB different from wedge? Many thanks

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  • Question on SyndicationItem - ASP.NET

    - by bobsmith123
    I am trying to understand how to use SyndicationItem to display feed which is RSS 2.0 or Atom compliant. What property of SyndicationItem gives me the entire description of the post. It appears that there is a Summary property but per MSDN, it gives only the Summary. Also I have noticed that in my RSS feed reader, some RSS feeds show only a few lines of description and I have to click and go to the website for the full post. But in some feeds, I can see the full post within the Feed Reader. Can someone explain how all this comes together? PS: My web page lets user enter a RSS feed address and I need to validate if the feed exists. If it does, I need to grab the last x items and show the feed's title and full description

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  • Raw XML Push from input stream captures only the first line of XML

    - by pqsk
    I'm trying to read XML that is being pushed to my java app. I originally had this in my glassfish server working. The working code in glassfish is as follows: public class XMLPush implements Serializable { public void processXML() { StringBuilder sb = new StringBuilder(); BufferedReader br = null; try { br = ((HttpServletRequest)FacesContext.getCurrentInstance().getExternalContext().getRequest()).getReader (); String s = null; while((s = br.readLine ()) != null) { sb.append ( s ); } //other code to process xml ........... ............................. }catch(Exception ex) { XMLCreator.exceptionOutput ( "processXML","Exception",ex); } .... ..... }//processXML }//class It works perfect, but my client is unable to have glassfish on their server. I tried grabbing the raw xml from php, but I couldn't get it to work. I decided to open up a socket and listen for the xml push manually. Here is my code for receiving the push: public class ListenerService extends Thread { private BufferedReader reader = null; private String line; public ListenerService ( Socket connection )thows Exception { this.reader = new BufferedReader ( new InputStreamReader ( connection.getInputStream () ) ); this.line = null; }//ListenerService @Override public void run () { try { while ( (this.line = this.reader.readLine ()) != null) { System.out.println ( this.line ); ........ }//while } System.out.println ( ex.toString () ); } } catch ( Exception ex ) { ... }//catch }//run I haven't done much socket programing, but from what I read for the past week is that passing the xml into a string is bad. What am I doing wrong and why is it that in glassfish server it works, and when I just open a socket myself it doesn't? this is all that I receive from the push: PUT /?XML_EXPORT_REASON=ResponseLoop&TIMESTAMP=1292559547 HTTP/1.1 Host: ************************ Accept: */* Content-Length: 470346 Expect: 100-continue <?xml version="1.0" encoding="UTF-8" ?> Where did the xml go? Is it because I am placing it in a string? I just need to grab the xml and save it into a file and then process it. Everything else works, but this.Any help would be greatly appreciated.

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  • Can't update textbox in TinyMCE

    - by Michael Tot Korsgaard
    I'm using TinyMCE, the text area is replaced with a TextBox, but when I try to update the database with the new text from my textbox, it wont update. Can anyone help me? My code looks like this <%@ Page Title="" Language="C#" MasterPageFile="~/Main.Master" AutoEventWireup="true" CodeBehind="default.aspx.cs" Inherits="Test_TinyMCE._default" ValidateRequest="false" %> <asp:Content ID="Content1" ContentPlaceHolderID="head" runat="server"> <script src="JavaScript/tiny_mce/tiny_mce.js" type="text/javascript"></script> <script type="text/javascript"> tinyMCE.init({ // General options mode: "textareas", theme: "advanced", plugins: "pagebreak,style,layer,table,save,advhr,advimage,advlink,emotions,iespell,insertdatetime,pre view,media,searchreplace,print,contextmenu,paste,directionality,fullscreen,noneditable,visualchars,no nbreaking,xhtmlxtras,template,wordcount,advlist,autosave", // Theme options theme_advanced_buttons1: "save,newdocument,|,bold,italic,underline,strikethrough,|,justifyleft,justifycenter,justifyright,justifyfull,styleselect,formatselect,fontselect,fontsizeselect", theme_advanced_buttons2: "cut,copy,paste,pastetext,pasteword,|,search,replace,|,bullist,numlist,|,outdent,indent,blockquote,|,undo,redo,|,link,unlink,anchor,image,cleanup,help,code,|,insertdate,inserttime,preview,|,forecolor,backcolor", theme_advanced_buttons3: "tablecontrols,|,hr,removeformat,visualaid,|,sub,sup,|,charmap,emotions,iespell,media,advhr,|,print,|,ltr,rtl,|,fullscreen", theme_advanced_buttons4: "insertlayer,moveforward,movebackward,absolute,|,styleprops,|,cite,abbr,acronym,del,ins,attribs,|,visualchars,nonbreaking,template,pagebreak,restoredraft", theme_advanced_toolbar_location: "top", theme_advanced_toolbar_align: "left", theme_advanced_statusbar_location: "bottom", theme_advanced_resizing: true, // Example content CSS (should be your site CSS) // using false to ensure that the default browser settings are used for best Accessibility // ACCESSIBILITY SETTINGS content_css: false, // Use browser preferred colors for dialogs. browser_preferred_colors: true, detect_highcontrast: true, // Drop lists for link/image/media/template dialogs template_external_list_url: "lists/template_list.js", external_link_list_url: "lists/link_list.js", external_image_list_url: "lists/image_list.js", media_external_list_url: "lists/media_list.js", // Style formats style_formats: [ { title: 'Bold text', inline: 'b' }, { title: 'Red text', inline: 'span', styles: { color: '#ff0000'} }, { title: 'Red header', block: 'h1', styles: { color: '#ff0000'} }, { title: 'Example 1', inline: 'span', classes: 'example1' }, { title: 'Example 2', inline: 'span', classes: 'example2' }, { title: 'Table styles' }, { title: 'Table row 1', selector: 'tr', classes: 'tablerow1' } ], // Replace values for the template plugin template_replace_values: { username: "Some User", staffid: "991234" } }); </script> </asp:Content> <asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" runat="server"> <div> <asp:TextBox ID="TextBox1" runat="server" TextMode="MultiLine"></asp:TextBox> <br /> <asp:LinkButton ID="LinkButton1" runat="server" onclick="LinkButton1_Click">Update</asp:LinkButton> </div> </asp:Content> My codebhind looks like this using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Web.UI; using System.Web.UI.WebControls; namespace Test_TinyMCE { public partial class _default : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { TextBox1.Text = Database.GetFirst().Text; } protected void LinkButton1_Click(object sender, EventArgs e) { Database.Update(Database.GetFirst().ID, TextBox1.Text); TextBox1.Text = Database.GetFirst().Text; } } } And finally the "Database" class im using looks like this using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Configuration; using System.Data.SqlClient; namespace Test_TinyMCE { public class Database { public int ID { get; set; } public string Text { get; set; } public static void Update(int ID, string Text) { SqlConnection connection = new SqlConnection(ConfigurationManager.AppSettings["DatabaseConnection"]); connection.Open(); try { SqlCommand command = new SqlCommand("Update Text set Text=@text where ID=@id"); command.Connection = connection; command.Parameters.Add(new SqlParameter("id", ID)); command.Parameters.Add(new SqlParameter("text", Text)); command.ExecuteNonQuery(); } finally { connection.Close(); } } public static Database GetFirst() { SqlConnection connection = new SqlConnection(ConfigurationManager.AppSettings["DatabaseConnection"]); connection.Open(); try { SqlCommand command = new SqlCommand("Select Top 1 ID, Text from Text order by ID asc"); command.Connection = connection; SqlDataReader reader = command.ExecuteReader(); if (reader.Read()) { Database item = new Database(); item.ID = reader.GetInt32(0); item.Text = reader.GetString(1); return item; } else { return null; } } finally { connection.Close(); } } } } I really hope that someone out there can help me

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  • Finisar SQLite Problem with ParameterDirection

    - by Emanuel
    private int GetNextId() { SQLiteConnector conn = new SQLiteConnector(false); conn.OpenConnection(); cmd = new SQLiteCommand("SELECT @id_account = MAX(id_account) FROM account"); SQLiteParameter param = new SQLiteParameter("@id_account", DbType.Int32); param.Direction = ParameterDirection.Output; cmd.Parameters.Add(param); cmd = conn.ExecuteReadeOutput(cmd); conn.Close(); return int.Parse(cmd.Parameters["id_account"].Value.ToString()) + 1; } ... public SQLiteCommand ExecuteReadeOutput(SQLiteCommand cmd) { conn.Open(); cmd.Connection = conn; reader = cmd.ExecuteReader(); reader.Close(); return cmd; } When I call the method GetNextId() occur the following error: Specified argument was out of the range of valid values. at line: param.Direction = ParameterDirection.Output; Any idea? Thanks.

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  • CruiseControl Console error message when parsing XML

    - by jarad
    I have CruiseControl(1.5) running in Win2k8R2 and svn(1.6.9) The error happens on a successful build after nant(0.86) Timeout(600 seconds). When I check the build dir everything is built correctly but CruiseControl Dashboard report Exception Here is the error shown in console: [:DEBUG] Exception: System.Xml.XmlException: The ',' character, hexadecimal value 0x2C, cannot be included in a name. Line 5544, position 274. at System.Xml.XmlTextReaderImpl.Throw(Exception e) at System.Xml.XmlTextReaderImpl.ParseElement() at System.Xml.XmlTextReaderImpl.ParseDocumentContent() at System.Xml.XmlWriter.WriteNode(XmlReader reader, Boolean defattr) at ThoughtWorks.CruiseControl.Core.Util.XmlFragmentWriter.WriteNode(XmlReader reader, Boolean defattr) at ThoughtWorks.CruiseControl.Core.Util.XmlFragmentWriter.WriteNode(String xml)

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  • SharePoint web part not displaying for site readers

    - by gregenslow
    Hello - I've built a custom SharePoint 2010 web part and deployed it to the home page of a publishing site. It's a very simple web part that just displays items from a SP list in a drop down list. The web part works fine if I'm logged in as a site owner or a member but not if I'm just a reader. The web part doesn't render at all to readers. I don't get any of the web part chrome or title, just nothing. I have other web parts (out-of-box ones) in the same zone that are displaying fine so it's not an issue of the whole zone not displaying. As a reader, I can still view the list directly so it doesn't appear to be a problem with list permissions. My web parts are being deployed as a farm solution, not sand-boxed and the assembly is being deployed to the GAC. I feel like I must be missing something simple here but I'm stumped. Help.

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  • C# File.ReadAllLines not breaking on line feeds

    - by David Dickerson
    Hello, I have an application that I am building that needs to modify a configuration file. My problem is that I am not able to read the file in line by line. I keep geeting the the entire file as a single string. string ConfigTemplate = AEBuildsSPFolderName + "\Template_BuildReleaseScript.Config"; string[] fileSourceLines = File.ReadAllLines(ConfigTemplate, Encoding.Default); --Returns the entire file contents into the first array element. using (StreamReader reader = new StreamReader(ConfigTemplate)) { string line; while ((line = reader.ReadLine()) != null) --Returns the entire file contents into the first line read. Any idea of what I am doing wrong? Thanks, david

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  • Java: Print and access List <String[]>

    - by battousai622
    Im reading in a file and storing it in t1. How do i access the elements in t1? When i try to print it i get addresses instead of values. Also whats the dif between string and string[]? CSVReader reader = new CSVReader(new FileReader("src/new_acquisitions.csv")); List <String[]> t1 = reader.readAll(); int i = 0 while(i < t1.size()) { System.out.println(t1.get(i)); i++; } output: [Ljava.lang.String;@9304b1 [Ljava.lang.String;@190d11 [Ljava.lang.String;@a90653 [Ljava.lang.String;@de6ced

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  • Why did my flash drive become "read only" and (how) can I fix it?

    - by Bob
    I have a brand new flash drive (one week old) that has become marked as read only, by Windows, Kubuntu and a bootable partitioner. Why did this happen? Is it fixable? If it is, how can I fix this? The problem Firstly, this drive is new. It's certainly not been used enough to die from normal wear and tear, though I would not discount defective components. The drive itself has somehow become locked in a read only state. Windows' Disk management: Diskpart: Generic Flash Disk USB Device Disk ID: 33FA33FA Type : USB Status : Online Path : 0 Target : 0 LUN ID : 0 Location Path : UNAVAILABLE Current Read-only State : Yes Read-only : No Boot Disk : No Pagefile Disk : No Hibernation File Disk : No Crashdump Disk : No Clustered Disk : No What really confuses me is Current Read-only State : Yes and Read-only : No. Attempted solutions So far, I've tried: Formatting it in Windows (in Disk management, the format options are greyed out when right clicking). DiskPart Clean (CLEAN - Clear the configuration information, or all information, off the disk.): DISKPART> clean DiskPart has encountered an error: The media is write protected. See the System Event Log for more information. There was nothing in the event log. Windows command line format >format G: Insert new disk for drive G: and press ENTER when ready... The type of the file system is FAT32. Verifying 7740M Cannot format. This volume is write protected. Windows chkdsk: see below for details Kubuntu fsck (through VirtualBox USB passthrough): see below for details Acronis True Image to format, to convert to GPT, to destroy and rebuild MBR, basically anything: failed (could not write to MBR) Details (and a nice story) Background This was a brand new, generic, 8GB flash drive I wanted to create a multiboot flash drive with. It came formatted as FAT32, though oddly a little larger than most 8 GIGAbyte flash drives I've come across. Approximately 127MB was listed as "used" by Windows. I never discovered why. The end usable space was about what I normally expect from a 8GB drive (approx 7.4 GIBIbytes). I had thrown quite a few Linux distros on, along with a copy of Hiren's. They would all boot perfectly. They were put on with YUMI. When I tried to put the Knoppix DVD on, YUMI added an odd video option to its boot comman which caused Knoppix to boot with a black screen on X. ttys 1 through 6 still worked as text only interfaces. A few days later, I took some time to take that odd video option off, making the boot command match the one that comes with Knoppix. On the attempt to boot, Knoppix reported some form of LZMA corruption. Leading up to the current issue I was thinking the Knoppix files may have been corrupted somehow, so I tried reloading it. The drive was nearly full (45MB free), so I deleted a generic ISO that also was not booting. That went fine. I then went through YUMI to 'uninstall' Knoppix, i.e. delete files and remove from the menus. The files went first, then the menus were cleared successfully. However, the free space was stuck at about 700MB, same as it was before removing Knoppix. In the old Knoppix folder, there was a 0 byte file named KNOPPIX that could not be deleted. I tried reinserting the drive to delete this file - without safely removing, if that made a difference (hey, first time for everything). Running the standard Windows chkdsk scan without /r or /f reported errors found. Running with /r just got it stuck. I decided to give fsck a shot, so I loaded up my Kubuntu VM and attached the drive to it with VirtualBox's USB 2.0 passthrough. I umounted it (/dev/sda1) and ran a fsck. There are differences between boot sector and its backup. I chose No action. It told me FATs differ and asked me to select either the first or second FAT. Whichever I selected, I got a notice of Free cluster summary wrong. If I chose Correct, it gave a list of incorrect file names. To try to fix something, at least, I ran it with the -p option. Halfway through fixing the files, the VM froze - I ended its process about ten minutes later. Cause? My next attempt was to use YUMI, again, to rebuild the whole drive. I used YUMI's built in reformat (to FAT32) option and installed a Kubuntu ISO (700MB). The format was successful, however, the extract and copy of Kubuntu (which YUMI uses a 7zip binary for) froze at about 60% done. After waiting for about fifteen minutes (longer than the 3.5GB Knoppix ISO took last time), I pulled the drive out. The drive at this point was already formatted, SYSLINUX already installed, just waiting on the unpacking of an ISO and the modifying of the boot menus. Plugging it back in, it came up as normal - however, any write action would fail. Disk management reported it as read only. On reconnect, it would come up as normal but a write operation would cause it to go read only again. After a few attempts, it started coming up as read only on insertion. Attempts to fix This is when I ran through the attempts listed above, to try and reformat it in case of a faulty format. However the inability to do so even on a bootable disk indicated something more serious is wrong. chkdsk now reports nothing is wrong, and fsck still reports MBR inconsistencies, but now always chooses first FAT automatically after telling me FATs differ. It still does the same Free cluster summary wrong afterwards. I cannot run with -p anymore because it is now marked as read only. It also managed to corrupt my VM's disk somehow on the first attempt (yes, I'm sure I chose sda, which is mapped to a 7.4GB drive - I triple checked). Thank god for snapshots? I'm just about out of ideas. To my inexperienced mind it looks like something in the drive's firmware set it to read only "permanently" somehow - is there any way to reset this? I don't particularly care about keeping data, considering I've reformatted it twice. Also, fixes that keep me in Windows are better; it reduces the risk of me accidentally nuking my main hard drive. Update 1: I pulled apart the drive out of curiosity. As you can see, there are no obvious write protect switches. There is an IC on the other side, ALCOR branded labelled AU6989HL, if that matters. If there appears to be no way to fix this, I'll probably pull out the (glued down) card and put it in a card reader to check if it's the card or the controller that died. Update 2: I've pulled the card off, Windows detects the drive as a card reader now. The contacts on the card don't appear to be used, and there are several rows of holes on the card itself. Putting it into the card reader only detects about 30MB total, RAW. It's probably either the reader incorrectly reporting the card as faulty (as if a real SD card's write protect was switched on) or a bad contact somewhere. If nothing else, I have a spare 8GB Micro SD card now... as soon as I figure out how to format it as 8GB.

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  • Continuation monad "interface"

    - by sdcvvc
    The state monad "interface" class MonadState s m where get :: m s put :: s -> m () (+ return and bind) allows to construct any possible computation with State monad without using State constructor. For example, State $ \s -> (s+1, s-1) can be written as do s <- get put (s-1) return (s+1) Similarily, I never have to use Reader constructor, because I can create that computation using ask, return and (>>=). Precisely: Reader f == ask >>= return . f. Is it the same true for continuations - is it possible to write all instances of Cont r a using callCC (the only function in MonadCont), return and bind, and never type something like Cont (\c -> ...)?

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  • How to create a Java String from the contents of a file

    - by Oscar Reyes
    I've been using this idiom for some time now. And it seems to be the most wide spread at least in the sites I've visited. Does anyone have a better/different way to read a file into a string in Java. Thanks private String readFile( String file ) throws IOException { BufferedReader reader = new BufferedReader( new FileReader (file)); String line = null; StringBuilder stringBuilder = new StringBuilder(); String ls = System.getProperty("line.separator"); while( ( line = reader.readLine() ) != null ) { stringBuilder.append( line ); stringBuilder.append( ls ); } return stringBuilder.toString(); }

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  • Do condition variables still need a mutex if you're changing the checked value atomically?

    - by Joseph Garvin
    Here is the typical way to use a condition variable: // The reader(s) lock(some_mutex); if(protected_by_mutex_var != desired_value) some_condition.wait(some_mutex); unlock(some_mutex); // The writer lock(some_mutex); protected_by_mutex_var = desired_value; unlock(some_mutex); some_condition.notify_all(); But if protected_by_mutex_var is set atomically by say, a compare-and-swap instruction, does the mutex serve any purpose (other than that pthreads and other APIs require you to pass in a mutex)? Is it protecting state used to implement the condition? If not, is it safe then to do this?: // The writer protected_by_mutex_var = desired_value; some_condition.notify_all(); With the writer never directly interacting with the reader's mutex? If so, is it even necessary that different readers use the same mutex?

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  • extract digg data by digg api

    - by vamsivanka
    I am trying to extract digg data for a user using this url "http://services.digg.com/user/vamsivanka/diggs?count=25&appkey=34asd56asdf789as87df65s4fas6" and the web response is throwing an error "The remote server returned an error: (403) Forbidden." Please let me know. public static XmlTextReader CreateWebRequest(string url) { HttpWebRequest webRequest = (HttpWebRequest)WebRequest.Create(url); webRequest.UserAgent = ".NET Framework digg Test Client"; webRequest.Credentials = System.Net.CredentialCache.DefaultCredentials; webRequest.Accept = "text/xml"; HttpWebResponse webResponse = (HttpWebResponse)webRequest.GetResponse(); System.IO.Stream responseStream = webResponse.GetResponseStream(); XmlTextReader reader = new XmlTextReader(responseStream); return reader; }

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