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  • Pandas Dataframe to JSON File with Separate Records

    - by Chris
    I'm attempting to dump data from a Pandas Dataframe into a JSON file to import into MongoDB. The format I require in a file has JSON records on each line of the form: {<column 1>:<value>,<column 2>:<value>,...,<column N>:<value>} df.to_json(,orient='records') gets close to the result but all the records are dumped within a single JSON array. Any thoughts on an efficient way to get this result from a dataframe? UPDATE: The best solution I've come up with is the following: dlist = df.to_dict('records') dlist = [json.dumps(record)+"\n" for record in dlist] open('data.json','w').writelines(dlist)

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  • XSS attack to bypass htmlspecialchars() function in value attribute

    - by Setzer
    Let's say we have this form, and the possible part for a user to inject malicious code is this below ... <input type=text name=username value=<?php echo htmlspecialchars($_POST['username']); ? ... We can't simply put a tag, or a javascript:alert(); call, because value will be interpreted as a string, and htmlspecialchars filters out the <,,',", so We can't close off the value with quotations. We can use String.fromCode(.....) to get around the quotes, but I still unable to get a simple alert box to pop up. Any ideas?

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  • Could not open Selected VM debug port (8700)

    - by John Gaby
    I am trying to debug the android source using Eclipse by following the instructions found at: http://source.android.com/using-eclipse I have downloaded the source, and gotten it to build. I follow the directions in the link above and everything is fine until I run the ddms command. At this point, if Eclipse is running I get the error 'Could not open Selected VM debug port (8700)'. If I close Eclipse, then ddms runs with no problem, and I can the the processes on the emulator. However, if I now open Eclipse, I get the same error. In any case, no matter what I do, if I attempt to remote debug, it always fails with 'Failed to connect to remote VM'. Any ideas? Thanks

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  • Improving ANTLR DSL parse-error messages

    - by Dan Fabulich
    I'm working on a domain-specific language (DSL) for non-programmers. Non-programmers make a lot of grammar mistakes: they misspell keywords, they don't close parentheses, they don't terminate blocks, etc. I'm using ANTLR to generate my parser; it provides a nifty mechanism for handling RecognitionExceptions to improve error handling. But I'm finding it pretty hard to develop good error-handling code for my DSL. At this point, I'm considering ways to simplify the language to make it easier for me to provide users with high-quality error messages, but I'm not really sure how to go about this. I think I want to reduce the ambiguity of errors somehow, but I'm not sure how to implement that idea in a grammar. In what ways can I simplify my language to improve parse-error messages for my users? EDIT: Updated to clarify that I'm interested in ways to simplify my language, not just ANTLR error-handling tips in general. (Though, thanks for those!)

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  • jQuery Block UI: node is undefined

    - by stef
    I'm close to finishing an app that uses quite a bit of JS. Recently Firebug started throwing an error that says "node is undefined", referring to data.parent = node.parentNode; on line 209 of jQuery blockUI plugin Version 2.31 (06-JAN-2010) @requires jQuery v1.2.3 or later. I'm using jQuery 1.4.2 When I remove the code from my page that triggers the Block UI action, the error is still there. So it does not seem to be an issue in my code but an "error" in the file itself, or perhaps some kind of conflict with another file? For info my code is below. My IDE is highlighting some syntax errors in here but it does that even when there are none. Perhaps I'm missing it? $.blockUI({ css: { border: 'none', padding: '25px', backgroundColor: '#fff', '-webkit-border-radius': '10px', '-moz-border-radius': '10px', opacity: 1, color: '#000' , cursor: 'auto' }, message: $('#block_ui_msg'), }); EDIT: I just replaced the block UI file with the latest version 2.33 (29-MAR-2010), error still occurs but this time on line 210.

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  • jqgrid sample using array data, what am I missing

    - by Dennis
    Hello. I'm new in jqgrid, I'm just trying thes example to work. I have a html file only, nothing more. When I ran this file, array data is not showing. What am I missing here? Thanks in advance. <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>jqGrid Demos</title> <link rel="stylesheet" type="text/css" media="screen" href="lib/jquery-ui-1.7.1.custom.css" /> <link rel="stylesheet" type="text/css" media="screen" href="lib/ui.jqgrid.css" /> <link rel="stylesheet" type="text/css" media="screen" href="lib/ui.multiselect.css" /> <style type="text/css"> html, body { margin: 0; /* Remove body margin/padding */ padding: 0; overflow: hidden; /* Remove scroll bars on browser window */ font-size: 75%; } /*Splitter style */ #LeftPane { /* optional, initial splitbar position */ overflow: auto; } /* * Right-side element of the splitter. */ #RightPane { padding: 2px; overflow: auto; } .ui-tabs-nav li {position: relative;} .ui-tabs-selected a span {padding-right: 10px;} .ui-tabs-close {display: none;position: absolute;top: 3px;right: 0px;z-index: 800;width: 16px;height: 14px;font-size: 10px; font-style: normal;cursor: pointer;} .ui-tabs-selected .ui-tabs-close {display: block;} .ui-layout-west .ui-jqgrid tr.jqgrow td { border-bottom: 0px none;} .ui-datepicker {z-index:1200;} </style> <script src="lib/jquery-1.4.2.js" type="text/javascript"></script> <script src="lib/jquery-ui-1.7.2.custom.min.js" type="text/javascript"></script> <script src="lib/jquery.layout.js" type="text/javascript"></script> <script src="lib/grid.locale-en.js" type="text/javascript"></script> <script src="lib/jquery.jqGrid.min.js" type="text/javascript"></script> <script src="lib/jquery.tablednd.js" type="text/javascript"></script> <script src="lib/jquery.contextmenu.js" type="text/javascript"></script> <script src="lib/ui.multiselect.js" type="text/javascript"></script> <script type="text/javascript"> // We use a document ready jquery function. jQuery(document).ready(function(){ jQuery("#list").jqGrid({ datatype: "local", height: 250, colNames:['Inv No','Date', 'Client', 'Amount','Tax','Total', 'Notes'], colModel:[ {name:'id',index:'id', width:60, sorttype:"int"}, {name:'invdate',index:'invdate', width:90, sorttype:"date"}, {name:'name',index:'name', width:100}, {name:'amount',index:'amount', width:80, align:"right",sorttype:"float"}, {name:'tax',index:'tax', width:80, align:"right",sorttype:"float"}, {name:'total',index:'total', width:80,align:"right",sorttype:"float"}, {name:'note',index:'note', width:150, sortable:false} ], pager: '#pager', rowNum:10, rowList:[10,20,30], sortname: 'id', sortorder: 'desc', viewrecords: true, multiselect: true, imgpath: "lib/basic/images", caption: "Manipulating Array Data" }); }); var mydata = [ {id:"1",invdate:"2007-10-01",name:"test",note:"note",amount:"200.00",tax:"10.00",total:"210.00"}, {id:"2",invdate:"2007-10-02",name:"test2",note:"note2",amount:"300.00",tax:"20.00",total:"320.00"}, {id:"3",invdate:"2007-09-01",name:"test3",note:"note3",amount:"400.00",tax:"30.00",total:"430.00"}, {id:"4",invdate:"2007-10-04",name:"test",note:"note",amount:"200.00",tax:"10.00",total:"210.00"}, {id:"5",invdate:"2007-10-05",name:"test2",note:"note2",amount:"300.00",tax:"20.00",total:"320.00"}, {id:"6",invdate:"2007-09-06",name:"test3",note:"note3",amount:"400.00",tax:"30.00",total:"430.00"}, {id:"7",invdate:"2007-10-04",name:"test",note:"note",amount:"200.00",tax:"10.00",total:"210.00"}, {id:"8",invdate:"2007-10-03",name:"test2",note:"note2",amount:"300.00",tax:"20.00",total:"320.00"}, {id:"9",invdate:"2007-09-01",name:"test3",note:"note3",amount:"400.00",tax:"30.00",total:"430.00"} ]; for(var i=0;i<=mydata.length;i++) jQuery("#list").jqGrid('addRowData',i + 1, mydata1[i]); </script> </head> <body> <table id="list" class="scroll"></table> <div id="pager" class="scroll" style="text-align:center;"></div> </body>

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  • How to handle the back button on Windows Phone 7

    - by David_001
    On the windows phone 7 emulator, when the hardware back button is pressed, the default behaviour is for it to close your current application. I want to override this default behaviour so that it navigates to the previous page in my application. After some research, it seems it should be possible to do this by overriding the OnBackKeyPress method, like so: protected override void OnBackKeyPress(System.ComponentModel.CancelEventArgs e) { // do some stuff ... // cancel the navigation e.Cancel = true; } However, clicking the back button still closes my application. Putting a breakpoint on the above method reveals that it is never called. I have another breakpoint on my application exit code, and this breakpoint is hit. Is there something else I need to do to intercept the back button?

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  • EFCreateError with JvCsvDataSet

    - by Kim Jensen
    I have been using JvCSVDataSet with Delphi 5 and it works fine. I just moved over to Delphi 2007 and now with the same program I get EFCreateError, cannot create file "" I got the error description from MAdexcept 3.0. Here are the code,I get the error in the line 'CADDCOUNT', but if I rem out that line then I don't get the error before I close the dataset. jvCsvDataSet1.FileName := 'C:\TEST.CSV'; jvCsvDataSet1.SaveToFile('C:\TEST.CSV'); jvCsvDataSet1.Active := True; jvCsvDataSet1.Append; jvCsvDataSet1.FieldByName('LINETYPE').Asstring := 'VERSION"; jvCsvDataSet1.FieldByName('CADDCOUNT').AsString := 'Company Name and address'; jvCsvDataSet1.Post; jvCsvDataSet1.Active := False; Thanks, for any help. Kim

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  • MDI WinForm application and duplicate child form memory leak

    - by Steve
    This is a WinForm MDI application problem (.net framework 3.0). It will be described in C#. Sorry it is a bit long because I try to make things as clear as possible. I have a MDI application. At some point I find that one MDI child form is never released. There is a menu that creates the MDI child form and show it. When the MDI child form is closed, it is supposed to be destroyed and the memory taken by it should be given back to .net. But to my surprise, this is not true. All the MDI child form instances are kept in memory. This is obviously a "memory leak". Well, it is not a real leak in .net. It is just that I think the closed form should be dead but somehow there is at least one unknown reference from outside world that still connect with the closed form. I read some articles on the Web. Some says that when the MDI child form is closing, I should unwire all the event handlers, otherwise some event handlers may keep my form alive. Some says that DataBindings should be cleaned before the form is closing otherwise the DataBindings will add references to some global Hashtable and thus keep my form alive. My form contains quite a lot things. Many event handlers and many DataBindings and many BindingSources and few suspected controls containing user control and HelpProvider. I create a big method that unwires all the event handlers from all the relevant controls, clear all the DataBindings and DataSources. The HelpProvider and user controls are disposed carefully. At the end, I find that, I don't have to clear DataBindings and DataSources. Event handlers are definitely causing the problem. And MDI form structure also contributes to something. During my experiments, I find that, if you create a MDI child form, even if you close it, there will still be one instance in the memory. The reference is from PropertyStore of the main form. This means, unless the main form is closed (application ends), there will always be one instance of MDI child form in the memory. The good news is that, no matter how many times you open and close the child form, there will be only one instance, not a big "leak". When it comes to event handlers, things become more tricky. I have to address that, all the event handlers on my form are anonymous event handlers. Here is an example code: //On MDI child form's design code... Button btnSave = new Button(); btnSave.Click += new System.EventHandler(btnSave_Click); Where btnSave_Click is also a method in MDI child form. The above is always the case for various controls and various types of event. To me, this is a bi-directional circular reference. btnSave keeps a reference of MDI child form via the event handler. MDI child form keeps a reference of btnSave instance. To me again, such bi-directional circular reference should not cause any problem for .net's garbage collector. This means that I do not have to explicitly unwire the event when the form is being disposed: btnSave.Click -= btnSave_Click; But the truth is not so. For some event handlers, they are safe. Ignoring them do not cause any duplicate instance. For some other event handlers, they will cause one instance remaining in the memory (similar effect as the MDI form structure, but this time caused by the hanging event handlers). For some other event handlers, they will cause every instance opened in the memory. I am totally confused about the differences between these three types of event handlers. The controls are created in the same way and the event is attached in the same way. What is the difference? (Don't tell me it is the event handle methods that make difference.) Anyone has experience of this wired scenario and has an answer for me? Thanks a lot. So now, for safety issue, I will have to unwire all the event handlers when the form is being disposed. That will be a long list of similar code for each control. Is there a general way of removing events from controls in recursive way using reflection? What about performance issue? That's the end of my story and I am still in the middle of my problem. For any help, I thank you.

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  • Installing PHPUnit via PEAR

    - by Ondrej Slinták
    I have problems installing PHPUnit 3.4.6 via PEAR 1.9.0. After I discover channel pear.phpunit.de and try to use one of following commands: pear install phpunit/PHPUnit pear install --alldeps phpunit/PHPUnit pear install --onlyreqdeps phpunit/PHPUnit it fails, giving me following error: No releases available for package "pear.phpunit.de/PHPUnit" install failed I found several threads from people with the same problem, but upgrading PEAR to the newest version usually worked for them. Also there seems to be close to no tutorials for installing PHPUnit for Windows. EDIT: I've also tried to change prefered_state to beta; didn't help. I've also tried to get list of all available packages: pear remote-list -c phpunit It gives me another error: Cannot download non-http URL "/c/categories.xml"

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  • Sharing WPF RichTextBox content with Silverlight RichTextBox

    - by Stewart Armbrecht
    Has anyone figured out the best way to persist a WPF and Silverlight RichTextBox content so that it can be shared between the two? I haven't had the time to test through this so I wanted to see if anyone else has. I currently have a WPF applicaiton that saves the content of a RichTextBox as a blob in the database using the following code: byte[] result = null; TextRange range = new TextRange(flowDocument.ContentStart, flowDocument.ContentEnd); if (range.IsEmpty == false) { using (MemoryStream strm = new MemoryStream()) { range.Save(strm, DataFormats.XamlPackage, true); result = strm.ToArray(); strm.Close(); } } return result; I am building a silverlight version of the application and want to know how I can load (and save) this content using the Silverlight RichTextBox so that it can still be using in the WPF application.

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  • Unable to open word file (MSWord 2007) when word automation program is running

    - by sankaran
    In my application i am using word automation to get the text content from the file. It is working fine no issues. But at the instant when word automation is processing, if i open the word file, it is throwing a dialog with message (any file) "This file is in use by another application or user. (C:\User\xyz\AppData...\Normal.dotm)". When close the dialog, it asking for save the file "normal.dotm"...template file. This happens only in MSWord 2007 not in MSWord 2003. can any one tell the solution please.

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  • Monitor files similar to System Internal's/Microsoft's FileMon/Process Monitor

    - by Tom1952
    I need to generate an event when a file is closed by another app. Unfortunately, ReadDirectoryChangesW doesn't report the close event. It would be possible for me to poll (with a TTimer) any file that reported by ReadDirectoryChangesW as modified, waiting for it to be closed (using CreateFile to detect this). However, what I'd prefer is a completely event driven solution. Is there a way to hook system calls and detect all file closing events? I simply want to know the path & name of any file that has just been closed.

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  • Translation of clustering problem to graph theory language

    - by honk
    I have a rectangular planar grid, with each cell assigned some integer weight. I am looking for an algorithm to identify clusters of 3 to 6 adjacent cells with higher-than-average weight. These blobs should have approximately circular shape. For my case the average weight of the cells not containing a cluster is around 6, and that for cells containing a cluster is around 6+4, i.e. there is a "background weight" somewhere around 6. The weights fluctuate with a Poisson statistic. For small background greedy or seeded algorithms perform pretty well, but this breaks down if my cluster cells have weights close to fluctuations in the background. Also, I cannot do a brute-force search looping through all possible setups because my grid is large (something like 1000x1000). I have the impression there might exist ways to tackle this in graph theory. I heard of vertex-covers and cliques, but am not sure how to best translate my problem into their language.

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  • Rsync on Windows - Socket operation on non-socket

    - by TLS
    I get the following error when trying to run the latest Cygwin version of rsync in Windows XP SP2. The error occurs for attempts at both local syncs (that is: source and destination on the local harddisk only) and remote syncs (using "-e ssh" from the openssh package). Any advice on how to fix/workaround it? bash-3.2$ rsync -a dir1 dir2 rsync: Failed to dup/close: Socket operation on non-socket (108) rsync error: error in IPC code (code 14) at /home/lapo/packaging/tmp/rsync-2.6.9/pipe.c(143) [receiver=2.6.9] rsync: read error: Connection reset by peer (104) rsync error: error in IPC code (code 14) at /home/lapo/packaging/tmp/rsync-2.6.9/io.c(604) [sender=2.6.9]

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  • How to prevent ajax toolkit DropDownExtender from closing on click?

    - by Abe Miessler
    I have the code below to implement a dropdownlist with checkboxes. My problem is that every time i click a checkbox the dropdownlist closes and i need to reopen it to select more checkboxes. How do i make it so the dropdownlist dosn't close until i click off of it? <asp:Panel ID="pnl_Items" runat="server" BorderColor="Aqua" BorderWidth="1"> <asp:CheckBoxList ID="cbl_Items" runat="server"> <asp:ListItem Text="Item 1" /> <asp:ListItem Text="Item 2" /> <asp:ListItem Text="Item 3" /> </asp:CheckBoxList> </asp:Panel> <br /> <asp:TextBox ID="tb_Items" runat="server"></asp:TextBox> <ajax:DropDownExtender ID="TextBox1_DropDownExtender" runat="server" DynamicServicePath="" Enabled="True" DropDownControlID="pnl_Items" on TargetControlID="tb_Items"> </ajax:DropDownExtender>

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  • Dataset -> XML Document - Load DataSet into an XML Document - C#.Net

    - by NLV
    Hello I'm trying to read a dataset as xml and load it into an XML Document. XmlDocument contractHistoryXMLSchemaDoc = new XmlDocument(); using (MemoryStream ms = new MemoryStream()) { //XmlWriterSettings xmlWSettings = new XmlWriterSettings(); //xmlWSettings.ConformanceLevel = ConformanceLevel.Auto; using (XmlWriter xmlW = XmlWriter.Create(ms)) { xmlW.WriteStartDocument(); dsContract.WriteXmlSchema(xmlW); xmlW.WriteEndDocument(); xmlW.Close(); using (XmlReader xmlR = XmlReader.Create(ms)) { contractHistoryXMLSchemaDoc.Load(xmlR); } } } But I'm getting the error - "Root Element Missing". Any ideas? Update When i do xmlR.ReadInnerXML() it is empty. Does anyone know why? NLV

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  • DockPanel ActivateMDIChild in C#

    - by James
    Hi I have used WeifenLuo.WinFormsUI.Docking Dockpanel in my project. I have three Document Style DockContent (i.e. A, B, C)in my application which has been arranged in tabbed style. On Focus() method of any of this dockContent (i.e. A, B, C) its getting activated and getting focus well. As per requirement i need to hide all three dockcontent(i.e. A, B, C) n need to show other two (i.e. D,E). And then once particular process get over, i close D,E and show A, B, C. Then after On Focus() of C, its focus is not getting set. May i know what could be the reason for the same. Please guide me for the same. Thanks.

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  • Show CMFCRibbonStatusBar

    - by praetorian20
    Hi, I'm creating a simple SDI app using the new VS2008 service pack. I added ribbon support but all I want on the ribbon are the Open & Close buttons. I commented out all the code that creates the other default buttons and categories but doing this also gets rid of the status bar (CMFCRibbonStatusBar). I can't find what member function is called when I click the checkbox that displays the statusbar in the default generated code. I've tried the following but it doesn't work: m_wndStatusBar.ShowWindow( SW_SHOWNORMAL ); How do I have the status bar showing without having to have the 'Home' category and 'View' panel (with the 'Show status bar' checkbox) being generated? Thanks, Ashish.

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  • Using James Server in Eclipse With JavaMail

    - by Jack Sparrow
    Would anyone be able to tell me how I can go about using James server as my server with Java in Eclipse? I'm trying to test the two classes posted below but i get the following error: Exception in thread "main" javax.mail.AuthenticationFailedException: Authentication failed. public class JamesConfigTest { public static void main(String[] args) throws Exception { // CREATE CLIENT INSTANCES MailClient redClient = new MailClient("red", "localhost"); MailClient greenClient = new MailClient("green", "localhost"); MailClient blueClient = new MailClient("blue", "localhost"); // CLEAR EVERYBODY'S INBOX redClient.checkInbox(MailClient.CLEAR_MESSAGES); greenClient.checkInbox(MailClient.CLEAR_MESSAGES); blueClient.checkInbox(MailClient.CLEAR_MESSAGES); Thread.sleep(500); // Let the server catch up // SEND A COUPLE OF MESSAGES TO BLUE (FROM RED AND GREEN) redClient.sendMessage( "blue@localhost", "Testing blue from red", "This is a test message"); greenClient.sendMessage( "blue@localhost", "Testing blue from green", "This is a test message"); Thread.sleep(500); // Let the server catch up // LIST MESSAGES FOR BLUE (EXPECT MESSAGES FROM RED AND GREEN) blueClient.checkInbox(MailClient.SHOW_AND_CLEAR); } } import java.io.*; import java.util.*; import javax.mail.*; import javax.mail.internet.*; public class MailClient extends Authenticator { public static final int SHOW_MESSAGES = 1; public static final int CLEAR_MESSAGES = 2; public static final int SHOW_AND_CLEAR = SHOW_MESSAGES + CLEAR_MESSAGES; protected String from; protected Session session; protected PasswordAuthentication authentication; public MailClient(String user, String host) { this(user, host, false); } public MailClient(String user, String host, boolean debug) { from = user + '@' + host; authentication = new PasswordAuthentication(user, user); Properties props = new Properties(); props.put("mail.user", user); props.put("mail.host", host); props.put("mail.debug", debug ? "true" : "false"); props.put("mail.store.protocol", "pop3"); props.put("mail.transport.protocol", "smtp"); session = Session.getInstance(props, this); } public PasswordAuthentication getPasswordAuthentication() { return authentication; } public void sendMessage( String to, String subject, String content) throws MessagingException { System.out.println("SENDING message from " + from + " to " + to); System.out.println(); MimeMessage msg = new MimeMessage(session); msg.addRecipients(Message.RecipientType.TO, to); msg.setSubject(subject); msg.setText(content); Transport.send(msg); } public void checkInbox(int mode) throws MessagingException, IOException { if (mode == 0) return; boolean show = (mode & SHOW_MESSAGES) > 0; boolean clear = (mode & CLEAR_MESSAGES) > 0; String action = (show ? "Show" : "") + (show && clear ? " and " : "") + (clear ? "Clear" : ""); System.out.println(action + " INBOX for " + from); Store store = session.getStore(); store.connect(); Folder root = store.getDefaultFolder(); Folder inbox = root.getFolder("inbox"); inbox.open(Folder.READ_WRITE); Message[] msgs = inbox.getMessages(); if (msgs.length == 0 && show) { System.out.println("No messages in inbox"); } for (int i = 0; i < msgs.length; i++) { MimeMessage msg = (MimeMessage)msgs[i]; if (show) { System.out.println(" From: " + msg.getFrom()[0]); System.out.println(" Subject: " + msg.getSubject()); System.out.println(" Content: " + msg.getContent()); } if (clear) { msg.setFlag(Flags.Flag.DELETED, true); } } inbox.close(true); store.close(); System.out.println(); } }

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  • Overlays with MkMapView do not scroll smoothly

    - by Chase
    By overriding the drawrect of my MkAnnotationViews, I am displaying paths using CoreGraphics. The problem I have is when I zoom in pretty close and scroll the map view, the paths drawn by CoreGraphics seem to be really jumpy, as if they are updated only after a shift of three or more pixels. When zoomed out, the scrolling is perfectly smooth and is reflected for each pixel shift. The drawrect function is not called during this scrolling as I assume mkmapkit is just applying translations on the existing views. Any ideas how to smooth this out or why this is happening?

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  • java.sql.SQLException: SQL logic error or missing database

    - by Sunil Kumar Sahoo
    Hi All, I ahve created database connection with SQLite using JDBC in java. My sql statements execute properly. But sometimes I get the following error while i use conn.commit() java.sql.SQLException: SQL logic error or missing database Can anyone please help me how to avoid this type of problem. Can anyone give me better approach of calling JDBC programs Class.forName("org.sqlite.JDBC"); conn = DriverManager.getConnection("jdbc:sqlite:/home/Data/database.db3"); conn.setAutoCommit(false); String query = "Update Chits set BlockedForChit = 0 where ServerChitID = '" + serverChitId + "' AND ChitGatewayID = '" + chitGatewayId + "'"; Statement stmt = null; try { stmt.execute(query); conn.commit(); stmt.close(); stmt = null; } Thanks Sunil Kumar Sahoo

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  • threaded serial port IOException when writing

    - by John McDonald
    Hi, I'm trying to write a small application that simply reads data from a socket, extracts some information (two integers) from the data and sends the extracted information off on a serial port. The idea is that it should start and just keep going. In short, it works, but not for long. After a consistently short period I start to receive IOExceptions and socket receive buffer is swamped. The thread framework has been taken from the MSDN serial port example. The delay in send(), readThread.Join(), is an effort to delay read() in order to allow serial port interrupt processing a chance to occur, but I think I've misinterpreted the join function. I either need to sync the processes more effectively or throw some data away as it comes in off the socket, which would be fine. The integer data is controlling a pan tilt unit and I'm sure four times a second would be acceptable, but not sure on how to best acheive either, any ideas would be greatly appreciated, cheers. using System; using System.Collections.Generic; using System.Text; using System.IO.Ports; using System.Threading; using System.Net; using System.Net.Sockets; using System.IO; namespace ConsoleApplication1 { class Program { static bool _continue; static SerialPort _serialPort; static Thread readThread; static Thread sendThread; static String sendString; static Socket s; static int byteCount; static Byte[] bytesReceived; // synchronise send and receive threads static bool dataReceived; const int FIONREAD = 0x4004667F; static void Main(string[] args) { dataReceived = false; readThread = new Thread(Read); sendThread = new Thread(Send); bytesReceived = new Byte[16384]; // Create a new SerialPort object with default settings. _serialPort = new SerialPort("COM4", 38400, Parity.None, 8, StopBits.One); // Set the read/write timeouts _serialPort.WriteTimeout = 500; _serialPort.Open(); string moveMode = "CV "; _serialPort.WriteLine(moveMode); s = null; IPHostEntry hostEntry = Dns.GetHostEntry("localhost"); foreach (IPAddress address in hostEntry.AddressList) { IPEndPoint ipe = new IPEndPoint(address, 10001); Socket tempSocket = new Socket(ipe.AddressFamily, SocketType.Stream, ProtocolType.Tcp); tempSocket.Connect(ipe); if (tempSocket.Connected) { s = tempSocket; s.ReceiveBufferSize = 16384; break; } else { continue; } } readThread.Start(); sendThread.Start(); while (_continue) { Thread.Sleep(10); ;// Console.WriteLine("main..."); } readThread.Join(); _serialPort.Close(); s.Close(); } public static void Read() { while (_continue) { try { //Console.WriteLine("Read"); if (!dataReceived) { byte[] outValue = BitConverter.GetBytes(0); // Check how many bytes have been received. s.IOControl(FIONREAD, null, outValue); uint bytesAvailable = BitConverter.ToUInt32(outValue, 0); if (bytesAvailable > 0) { Console.WriteLine("Read thread..." + bytesAvailable); byteCount = s.Receive(bytesReceived); string str = Encoding.ASCII.GetString(bytesReceived); //str = Encoding::UTF8->GetString( bytesReceived ); string[] split = str.Split(new Char[] { '\t', '\r', '\n' }); string filteredX = (split.GetValue(7)).ToString(); string filteredY = (split.GetValue(8)).ToString(); string[] AzSplit = filteredX.Split(new Char[] { '.' }); filteredX = (AzSplit.GetValue(0)).ToString(); string[] ElSplit = filteredY.Split(new Char[] { '.' }); filteredY = (ElSplit.GetValue(0)).ToString(); // scale values int x = (int)(Convert.ToInt32(filteredX) * 1.9); string scaledAz = x.ToString(); int y = (int)(Convert.ToInt32(filteredY) * 1.9); string scaledEl = y.ToString(); String moveAz = "PS" + scaledAz + " "; String moveEl = "TS" + scaledEl + " "; sendString = moveAz + moveEl; dataReceived = true; } } } catch (TimeoutException) {Console.WriteLine("timeout exception");} catch (NullReferenceException) {Console.WriteLine("Read NULL reference exception");} } } public static void Send() { while (_continue) { try { if (dataReceived) { // sleep Read() thread to allow serial port interrupt processing readThread.Join(100); // send command to PTU dataReceived = false; Console.WriteLine(sendString); _serialPort.WriteLine(sendString); } } catch (TimeoutException) { Console.WriteLine("Timeout exception"); } catch (IOException) { Console.WriteLine("IOException exception"); } catch (NullReferenceException) { Console.WriteLine("Send NULL reference exception"); } } } } }

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  • execcommand("SaveAs",null,"file.csv") is not working in IE8

    - by anbu
    var doc = w.docment; doc.open('application/CSV','replace'); doc.charset = "utf-8"; doc.write("all,hello"); doc.close(); if(doc.execcommand("SaveAs",null,"file.csv")) { window.alert("saved "); }else { window.alert("cannot be saved"); } not working in IE 8 but woks in IE 6 what is the problem ? it is alerting "cannot be saved" help me !!! advance thanks

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

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

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