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  • poll(2) doesn't empty the event queue

    - by sasayins
    Hi, Im using linux as my programming platform. I am using poll(2) to know if my device is triggering an event. The first call of poll is ok, it blocks and wait for the event to happen. But in the second poll function call, it will return but it capture the event. Below are my code ret = poll( fds, 1, 2000); //2 secs timeout if( fds[0].revents & POLLIN && ret > 0) { printf("event occur\n"); } It seems the queue/buffer is not empty, im just assuming. What do you think is the problem? Thanks.

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  • Delete from empty table taking forver

    - by Will
    Hello, I have an empty table that previously had a large amount of rows. The table has about 10 columns and indexes on many of them, as well as indexes on multiple columns. DELETE FROM item WHERE 1=1 This takes approximately 40 seconds to complete SELECT * FROM item this takes 4 seconds. The execution plan of SELECT * FROM ITEM shows the following; SQL> select * from midas_item; no rows selected Elapsed: 00:00:04.29 Execution Plan ---------------------------------------------------------- 0 SELECT STATEMENT Optimizer=CHOOSE (Cost=19 Card=123 Bytes=73 80) 1 0 TABLE ACCESS (FULL) OF 'MIDAS_ITEM' (Cost=19 Card=123 Byte s=7380) Statistics ---------------------------------------------------------- 0 recursive calls 0 db block gets 5263 consistent gets 5252 physical reads 0 redo size 1030 bytes sent via SQL*Net to client 372 bytes received via SQL*Net from client 1 SQL*Net roundtrips to/from client 0 sorts (memory) 0 sorts (disk) 0 rows processed any idea why these would be taking so long and how to fix it would be greatly appreciated!!

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  • Non-empty list with null elements returned from Hibernate query

    - by John
    Hi, I'm new to hibernate so not sure if this is an expected behaviour, anyway: Session session = (Session)entityManager.getDelegate(); Criteria criteria = session.createCriteria(myRequest.class); criteria.add(Restrictions.eq("username", username)); criteria.setProjection(Projections.max("accesscount")); List<myRequest> results = criteria.list(); The returned results is a non-empty list with a single null element. I can't think of any reason why it should behave this way, any idea if this is the expected behaviour or have I done something wrong? System is on hibernate/Syabse. Thanks.

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  • Hide or display a button according to row count of a table

    - by kawtousse
    Hi, i have a HTML table and a button send. First of all the send button must have this style: style.display="none". But if the table has at least one row the button should be displayed (block/inline); I still have no idea how to relate between the table and the button. I try to use JavaScript but i should think about a function and I don't found any of it to apply at type table. Thinking about CSS still also hard since I cannot find a relation between the table and the button.

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  • MySQL: Return grouped fields where the group is not empty, efficiently

    - by Ryan Badour
    In one statement I'm trying to group rows of one table by joining to another table. I want to only get grouped rows where their grouped result is not empty. Ex. Items and Categories SELECT Category.id FROM Item, Category WHERE Category.id = Item.categoryId GROUP BY Category.id HAVING COUNT(Item.id) > 0 The above query gives me the results that I want but this is slow, since it has to count all the rows grouped by Category.id. What's a more effecient way? I was trying to do a Group By LIMIT to only retrieve one row per group. But my attempts failed horribly. Any idea how I can do this? Thanks

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  • PHP contact form sends empty data

    - by Alan Lawlessness
    I am trying to create a HTML5 contact form compatible with computer and mobile devices, when I clicked on send message it jumps into a blank white screen. I do get a email but it contains no information. I am quite new with PHP. For www.rare1.ca/test: <!DOCTYPE html> <html> <head> <title>Responsive HTML5/CSS3 template</title> <meta charset="utf-8" /> <meta name = "viewport" content = "width=device-width, maximum-scale = 1, minimum- scale=1" /> <link rel="stylesheet" type="text/css" href="css/default.css" media="all" /> <link rel="stylesheet" href="css/flexslider.css" type="text/css" /> <link href='http://fonts.googleapis.com/css?family=PT+Sans' rel='stylesheet' type='text/css' /> <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js"> </script> <script src="js/jquery.flexslider.js"></script> <script src="js/default.js"></script> <!--[if lt IE 9]> <script src="http://html5shim.googlecode.com/svn/trunk/html5.js"></script> <script src="js/respond.min.js"></script> <![endif]--> </head> <body> <div id="pagewidth"> <header id="header"> <div class="center"> <nav id="mainNav"> <ul> <li class="active"><a href="#pagewidth"><span>gallery</span></a></li> <li></li> <li></li> <li></li> <li></li> <li><a href="#contactUs"><span>contact us</span></a></li> </ul> </nav> </div> </header> <div id="content"> <section class="row"> <div class="center"> <h1><img src="img/logo.gif" width="142" height="78"></h1> <strong class="subHeading">Coming soon</strong> <div class="gallery"> <ul class="slides"> <li><img src="img/img-gallery.jpg" alt="image" /></li> <li><img src="img/img-gallery2.jpg" alt="image" /></li> <li><img src="img/img-gallery3.jpg" alt="image" /></li> </ul> </div> <div class="buttons"></div> </div> </section> <section id="contactUs" class="row grey"> <div class="center"> <h1>Contact Us</h1> <strong class="subHeading">lorem ipsum dolor sit amet, consectetur adipiscing elit</strong> <div class="columns"> <div class="half"> <form action="sendemail.php" class="form"> <fieldset> <h2>Feedback form</h2> <div class="formRow"> <div class="textField"><input type="text" name="Name" id="name" placeholder="Your name ..." /></div> </div> <div class="formRow"> <div class="textField"><input type="text" name="Email" id="email" placeholder="Your Email ..." /></div> </div> <div class="formRow"> <div class="textField"><textarea name="Message" cols="20" rows="4" placeholder="Your message ..."></textarea> </div> </div> <div class="formRow"> <button class="btnSmall btn submit right"> <span>Send Message</span> </button> </div> </fieldset> </form> </div> <div class="half"> <h2>How to find us</h2> <div id="map"> <div class="imgHolder"><img src="img/map.jpg" alt="google map" /></div> </div> </div> </div> </div> </section> </div> <footer id="footer"> <div class="center"> </div> </footer> </div> </body> </html> <?php // This is the script for sending email. // change the email address below to your own email address. $mailTo = '[email protected]'; $name = htmlspecialchars($_POST['Name']); $mailFrom = htmlspecialchars($_POST['Email']); $message_text = htmlspecialchars($_POST['Message']); $headers = "From: $name <$mailFrom>\n"; $headers .= "Reply-To: $name <$mailFrom>\n"; $message = $message_text; mail($mailTo, $subject, $message, $headers ); ?>

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  • Inserting and Deleting Sub Rows in GridView

    - by Vincent Maverick Durano
    A user in the forums (http://forums.asp.net) is asking how to insert  sub rows in GridView and also add delete functionality for the inserted sub rows. In this post I'm going to demonstrate how to this in ASP.NET WebForms.  The basic idea to achieve this is we just need to insert row data in the DataSource that is being used in GridView since the GridView rows will be generated based on the DataSource data. To make it more clear then let's build up a sample application. To start fire up Visual Studio and create a WebSite or Web Application project and then add a new WebForm. In the WebForm ASPX page add this GridView markup below:   1: <asp:gridview ID="GridView1" runat="server" AutoGenerateColumns="false" onrowdatabound="GridView1_RowDataBound"> 2: <Columns> 3: <asp:BoundField DataField="RowNumber" HeaderText="Row Number" /> 4: <asp:TemplateField HeaderText="Header 1"> 5: <ItemTemplate> 6: <asp:TextBox ID="TextBox1" runat="server"></asp:TextBox> 7: </ItemTemplate> 8: </asp:TemplateField> 9: <asp:TemplateField HeaderText="Header 2"> 10: <ItemTemplate> 11: <asp:TextBox ID="TextBox2" runat="server"></asp:TextBox> 12: </ItemTemplate> 13: </asp:TemplateField> 14: <asp:TemplateField HeaderText="Header 3"> 15: <ItemTemplate> 16: <asp:TextBox ID="TextBox3" runat="server"></asp:TextBox> 17: </ItemTemplate> 18: </asp:TemplateField> 19: <asp:TemplateField HeaderText="Action"> 20: <ItemTemplate> 21: <asp:LinkButton ID="LinkButton1" runat="server" onclick="LinkButton1_Click" Text="Insert"></asp:LinkButton> 22: </ItemTemplate> 23: </asp:TemplateField> 24: </Columns> 25: </asp:gridview>   Then at the code behind source of ASPX page you can add this codes below:   1: private DataTable FillData() { 2:   3: DataTable dt = new DataTable(); 4: DataRow dr = null; 5:   6: //Create DataTable columns 7: dt.Columns.Add(new DataColumn("RowNumber", typeof(string))); 8:   9: //Create Row for each columns 10: dr = dt.NewRow(); 11: dr["RowNumber"] = 1; 12: dt.Rows.Add(dr); 13:   14: dr = dt.NewRow(); 15: dr["RowNumber"] = 2; 16: dt.Rows.Add(dr); 17:   18: dr = dt.NewRow(); 19: dr["RowNumber"] = 3; 20: dt.Rows.Add(dr); 21:   22: dr = dt.NewRow(); 23: dr["RowNumber"] = 4; 24: dt.Rows.Add(dr); 25:   26: dr = dt.NewRow(); 27: dr["RowNumber"] = 5; 28: dt.Rows.Add(dr); 29:   30: //Store the DataTable in ViewState for future reference 31: ViewState["CurrentTable"] = dt; 32:   33: return dt; 34:   35: } 36:   37: private void BindGridView(DataTable dtSource) { 38: GridView1.DataSource = dtSource; 39: GridView1.DataBind(); 40: } 41:   42: private DataRow InsertRow(DataTable dtSource, string value) { 43: DataRow dr = dtSource.NewRow(); 44: dr["RowNumber"] = value; 45: return dr; 46: } 47: //private DataRow DeleteRow(DataTable dtSource, 48:   49: protected void Page_Load(object sender, EventArgs e) { 50: if (!IsPostBack) { 51: BindGridView(FillData()); 52: } 53: } 54:   55: protected void LinkButton1_Click(object sender, EventArgs e) { 56: LinkButton lb = (LinkButton)sender; 57: GridViewRow row = (GridViewRow)lb.NamingContainer; 58: DataTable dtCurrentData = (DataTable)ViewState["CurrentTable"]; 59: if (lb.Text == "Insert") { 60: //Insert new row below the selected row 61: dtCurrentData.Rows.InsertAt(InsertRow(dtCurrentData, row.Cells[0].Text + "-sub"), row.RowIndex + 1); 62:   63: } 64: else { 65: //Delete selected sub row 66: dtCurrentData.Rows.RemoveAt(row.RowIndex); 67: } 68:   69: BindGridView(dtCurrentData); 70: ViewState["CurrentTable"] = dtCurrentData; 71: } 72:   73: protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e) { 74: if (e.Row.RowType == DataControlRowType.DataRow) { 75: if (e.Row.Cells[0].Text.Contains("-sub")) { 76: ((LinkButton)e.Row.FindControl("LinkButton1")).Text = "Delete"; 77: } 78: } 79: }   As you can see the code above is pretty straight forward and self explainatory but just to give you a short explaination the code above is composed of three (3) private methods which are the FillData(), BindGridView and InsertRow(). The FillData() method is a method that returns a DataTable and basically creates a dummy data in the DataTable to be used as the GridView DataSource. You can replace the code in that method if you want to use actual data from database but for the purpose of this example I just fill the DataTable with a dummy data on it. The BindGridVew is a method that handles the actual binding of GridVew. The InsertRow() is a method that returns a DataRow. This method handles the insertion of the sub row. Now in the LinkButton OnClick event, we casted the sender to a LinkButton to determine the specific object that fires up the event and get the row values. We then reference the Data from ViewState to get the current data that is being used in the GridView. If the LinkButton text is "Insert" then we will insert new row to the DataSource ( in this case the DataTable) based on the rowIndex if not then Delete the sub row that was added. Here are some screen shots of the output below: On initial load:   After inserting a sub row:   That's it! I hope someone find this post useful!   Technorati Tags: ASP.NET,C#,GridView

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  • Configuration data: single-row table vs. name-value-pair table

    - by Heinzi
    Let's say you write an application that can be configured by the user. For storing this "configuration data" into a database, two patterns are commonly used. The single-row table CompanyName | StartFullScreen | RefreshSeconds | ... ---------------+-------------------+------------------+-------- ACME Inc. | true | 20 | ... The name-value-pair table ConfigOption | Value -----------------+------------- CompanyName | ACME Inc. StartFullScreen | true (or 1, or Y, ...) RefreshSeconds | 20 ... | ... I've seen both options in the wild, and both have obvious advantages and disadvantages, for example: The single-row tables limits the number of configuration options you can have (since the number of columns in a row is usually limited). Every additional configuration option requires a DB schema change. In a name-value-pair table everything is "stringly typed" (you have to encode/decode your Boolean/Date/etc. parameters). (many more) Is there some consensus within the development community about which option is preferable?

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  • JqGrid Add custom button to Row

    - by oirfc
    Hi there, I am trying to add a custom button to a JqGrid that implements a 'Check Out' process. Basically, every row has a 'Check Out' button that if clicked should be able to send a post back to the server and update a shopping cart and then change the button text to 'Undo Check Out'. So far I have: colNames: ['Id', ... , 'Action' ], colModel: [ { name: 'Id', sortable: false, width: 1, hidden: true}, ... { name: 'action', index: 'action', width: 75, sortable: false } ], ... gridComplete: function() { var ids = jQuery("#east-grid").jqGrid('getDataIDs'); for (var i = 0; i < ids.length; i++) { var cl = ids[i]; checkout = "<input style='height:22px;width:75px;' type='button' value='Check Out' onclick=\" ??? \" />"; jQuery("#east-grid").jqGrid('setRowData', ids[i], { action: checkout }); } }, ... Where '???' is the part I need to solve. Thank you in advance for your help.

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  • Powershell Transcript is empty when running script from SQL Agent Job in 2005 SQL Server

    - by Greg Bray
    I have a complex Powershell script that gets run as part of a SQL 2005 Server Agent Job. The script works fine, but it uses the "Start-Transcript $strLogfile -Append" command to log all of it's actions to a transcript file. The problem is that the transcript is always empty. It adds the header and footer to indicate that the transcript is starting and stopping, but it doesn't actually log anything. Example: ********************** Windows PowerShell Transcript Start Start time: 20100304173001 Username : xxxxxxxxxxxx\SYSTEM Machine : xxxxx-xxx (Microsoft Windows NT 5.2.3790 Service Pack 2) ********************** ********************** Windows PowerShell Transcript End End time: 20100304173118 ********************** When I execute the script from a command prompt or start - run everything works just fine. Here is the command used to run the script (same command used in the Operating system CmdExec step of the SQL Agent Job) powershell.exe -File "c:\temp\Backup\backup script.ps1" I first thought it must have something to do with the script running under the System account (default SQL Agent account), but even when I tried changing the SQL Agent to run under my own personal account it still created a blank transcript. Is there any way to get PowerShell Transcripts to work when executing them as part of a 2005 SQL Server Agent Job?

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  • ExtJS: remove a grid from a tabpanel when its underlying store is empty

    - by Antonio
    Hi, I have TabPanel which contains, among other things, a Grid connected to a Store. Several events may remove elements from the store. I would like the Grid to be removed from the TabPanel when the store is empty and, possibly, to have a single place in my code to check for this event. I thought about using store listeners, but unfortunately this causes exceptions in Ext code. My assumption is that this happens because rendering is performed on the grid after this is removed from the tabpanel. Any idea on how to accomplish such a task without messing up Ext is much appreciated. Thanks :) By the way, this is a code excerpt: var myStore = new Ext.data.Store({ reader: new Ext.data.JsonReader({fields: MyRecord}), listeners:{ 'clear': function(store, recs) { myTabPanel.remove(myGrid); }, 'remove': function(store, rec, idx) { if (store.getCount() == 0) { myTabPanel.remove(myGrid); } } } }); var myGrid = new Ext.grid.GridPanel({ id: "myGrid", title: "A Grid", store: myStore, frame:false, border:false, columns: [ { header: 'Remove', align:'center', width: 45, sortable: false, renderer: function(value, metaData, record, rowIndex, colIndex, store) { return '<img src="images/remove.png" width="34" height="18"/>'; } },{ header: 'Some Data', dataIndex: 'data', sortable: true } ], listeners:{ 'cellclick':function(grid, rowIndex, colIndex, e){ var rec = myStore.getAt(rowIndex); if(colIndex == 0){ myStore.remove(rec); } } } }); var myTabPanel= new Ext.TabPanel({ activeTab: 0, items: [ fooPanel, barPanel, myGrid] });

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  • jqGrid with JSON data renders table as empty

    - by jgreep
    I'm trying to create a jqgrid, but the table is empty. The table renders, but the data doesn't show. The data I'm getting back from the php call is: { "page":"1", "total":1, "records":"10", "rows":[ {"id":"2:1","cell":["1","image","Chief Scout","Highest Award test","0"]}, {"id":"2:2","cell":["2","image","Link Badge","When you are invested as a Scout, you may be eligible to receive a Link Badge. (See page 45)","0"]}, {"id":"2:3","cell":["3","image","Pioneer Scout","Upon completion of requirements, the youth is invested as a Pioneer Scout","0"]}, {"id":"2:4","cell":["4","image","Voyageur Scout Award","Voyageur Scout Award is the right after Pioneer Scout.","0"]}, {"id":"2:5","cell":["5","image","Voyageur Citizenship","Learning about and caring for your community.","0"]}, {"id":"2:6","cell":["6","image","Fish and Wildlife","Demonstrate your knowledge and involvement in fish and wildlife management.","0"]}, {"id":"2:7","cell":["7","image","Photography","To recognize photography knowledge and skills","0"]}, {"id":"2:8","cell":["8","image","Recycling","Demonstrate your knowledge and involvement in Recycling","0"]}, {"id":"2:10","cell":["10","image","Voyageur Leadership ","Show leadership ability","0"]}, {"id":"2:11","cell":["11","image","World Conservation","World Conservation Badge","0"]} ]} The javascript configuration looks like so: $("#"+tableId).jqGrid ({ url:'getAwards.php?id='+classId, dataType : 'json', mtype:'POST', colNames:['Id','Badge','Name','Description',''], colModel : [ {name:'awardId', width:30, sortable:true, align:'center'}, {name:'badge', width:40, sortable:false, align:'center'}, {name:'name', width:180, sortable:true, align:'left'}, {name:'description', width:380, sortable:true, align:'left'}, {name:'selected', width:0, sortable:false, align:'center'} ], sortname: "awardId", sortorder: "asc", pager: $('#'+tableId+'_pager'), rowNum:15, rowList:[15,30,50], caption: 'Awards', viewrecords:true, imgpath: 'scripts/jqGrid/themes/green/images', jsonReader : { root: "rows", page: "page", total: "total", records: "records", repeatitems: true, cell: "cell", id: "id", userdata: "userdata", subgrid: {root:"rows", repeatitems: true, cell:"cell" } }, width: 700, height: 200 }); The HTML looks like: <table class="awardsList" id="awardsList2" class="scroll" name="awardsList" /> <div id="awardsList2_pager" class="scroll"></div> I'm not sure that I needed to define jsonReader, since I've tried to keep to the default. If the php code will help, I can post it too.

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  • Empty responseText from XMLHttpRequest

    - by PurplePilot
    I have written an XMLHttpRequest which runs fine but returns an empty responseText. The javascript is as follows: var anUrl = "http://api.xxx.com/rates/csv/rates.txt"; var myRequest = new XMLHttpRequest(); callAjax(anUrl); function callAjax(url) { myRequest.open("GET", url, true); myRequest.onreadystatechange = responseAjax; myRequest.setRequestHeader("Cache-Control", "no-cache"); myRequest.send(null); } function responseAjax() { if(myRequest.readyState == 4) { if(myRequest.status == 200) { result = myRequest.responseText; alert(result); alert("we made it"); } else { alert( " An error has occurred: " + myRequest.statusText); } } } The code runs fine. I can walk through and I get the readyState == 4 and a status == 200 but the responseText is always blank. I am getting a log error (in Safari debug) of Error dispatching: getProperties which I cannot seem to find reference to. I have run the code in Safari and Firefox both locally and on a remote server. The URL when put into a browser will return the string and give a status code of 200. I wrote similar code to the same URL in a Mac Widget which runs fine, but the same code in a browser never returns a result.

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  • MySQL Error 1452 - Cannot add or update a child row: a foreign key constraint fails

    - by dscher
    I've looked at other people's questions on this topic but can't seem to find where my error is coming from. Any help would be greatly appreciated. I'm including as much as I can think of that might help find the problem: CREATE TABLE stocks ( id INT AUTO_INCREMENT NOT NULL, user_id INT(11) UNSIGNED NOT NULL, ticker VARCHAR(20) NOT NULL, name VARCHAR(20), rating INT(11), position ENUM("strong buy", "buy", "sell", "strong sell", "neutral"), next_look DATE, privacy ENUM("public", "private"), PRIMARY KEY(id), FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE ) ENGINE=InnoDB DEFAULT CHARSET=utf8; CREATE TABLE IF NOT EXISTS `stocks_tags` ( `stock_id` INT NOT NULL, `tag_id` INT NOT NULL, PRIMARY KEY (`stock_id`,`tag_id`), KEY `fk_stock_tag` (`tag_id`), KEY `fk_tag_stock` (`stock_id`) ) ENGINE=InnoDB DEFAULT CHARSET=utf8; ALTER TABLE `stocks_tags` ADD CONSTRAINT `fk_stock_tag` FOREIGN KEY (`tag_id`) REFERENCES `tags` (`id`) ON DELETE CASCADE ON UPDATE CASCADE, ADD CONSTRAINT `fk_tag_stock` FOREIGN KEY (`stock_id`) REFERENCES `stocks` (`id`) ON DELETE CASCADE ON UPDATE CASCADE; CREATE TABLE tags( id INT AUTO_INCREMENT NOT NULL PRIMARY KEY, tags VARCHAR(30), UNIQUE(tags) ) ENGINE=INNODB DEFAULT CHARSET=utf8; And the error I'm getting: Database_Exception [ 1452 ]: Cannot add or update a child row: a foreign key constraint fails (`ddmachine`.`stocks_tags`, CONSTRAINT `fk_stock_tag` FOREIGN KEY (`tag_id`) REFERENCES `tags` (`id`) ON DELETE CASCADE ON UPDATE CASCADE) [ INSERT INTO `stocks_tags` (`stock_id`, `tag_id`) VALUES (19, 'cash') ] I did see that someone else had a similar problem based on their enum columns but don't think that's it.

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  • Using .NET's HttpWebRequest to download a multitude of files in a row

    - by Cornelius
    I have an application that needs to download several files in a row in succession (sometimes a few thousand). However, what ends up happening when several files need to be downloaded is I get an exception with an inner exception of type SocketException and the error code 10048 (WSAEADDRINUSE). I did some digging and basically it's because the server has run out of sockets (and they are all waiting for 240s or so before they become available again) - not coincidentally it starts happening around the 1024 file range. I would expect that the HttpWebRequest/ServicePointManager would be reusing my connection, but apparently it is not (and the files are https, so that may be part of it). I never saw this problem in the C++ code that this was ported from (but that doesn't mean it didn't ever happen - I'd be surprised if it was, though). I am properly closing the WebRequest object and the HttpWebRequest object has KeepAlive set to true by default. Next my intent is to fiddle around with ServicePointManager.SetTcpKeepAlive(). However, I can't see how more people haven't run into this problem. Has anyone else run into the problem, and if so, what did you do to get around it? Currently I have a retry scheme that detects this error and waits it out, but that doesn't seem like the right thing to do. Here's some basic code to verify what I'm doing (just in case I'm missing closing something): WebRequest webRequest = WebRequest.Create(uri); webRequest.Method = "GET"; webRequest.Credentials = new NetworkCredential(username, password); WebResponse webResponse = webRequest.GetResponse(); try { using(Stream stream = webResponse.GetResponseStream()) { // read the stream } } finally { webResponse.Close() }

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  • mysql query to dynamically convert row data to columns

    - by Anirudh Goel
    I am working on a pivot table query. The schema is as follows Sno, Name, District The same name may appear in many districts eg take the sample data for example 1 Mike CA 2 Mike CA 3 Proctor JB 4 Luke MN 5 Luke MN 6 Mike CA 7 Mike LP 8 Proctor MN 9 Proctor JB 10 Proctor MN 11 Luke MN As you see i have a set of 4 distinct districts (CA, JB, MN, LP). Now i wanted to get the pivot table generated for it by mapping the name against districts Name CA JB MN LP Mike 3 0 0 1 Proctor 0 2 2 0 Luke 0 0 3 0 i wrote the following query for this select name,sum(if(District="CA",1,0)) as "CA",sum(if(District="JB",1,0)) as "JB",sum(if(District="MN",1,0)) as "MN",sum(if(District="LP",1,0)) as "LP" from district_details group by name However there is a possibility that the districts may increase, in that case i will have to manually edit the query again and add the new district to it. I want to know if there is a query which can dynamically take the names of distinct districts and run the above query. I know i can do it with a procedure and generating the script on the fly, is there any other method too? I ask so because the output of the query "select distinct(districts) from district_details" will return me a single column having district name on each row, which i will like to be transposed to the column.

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  • Android WebView - cannot understand - Null or empty value for header "if-none-match"

    - by ganesh
    Hi When i tried to load a url i get an exception as below Uncaught handler: thread WebViewCoreThread exiting due to uncaught exception 06-16 10:22:31.471: ERROR/AndroidRuntime(635): java.lang.RuntimeException: Null or empty value for header "if-none-match" 06-16 10:22:31.471: ERROR/AndroidRuntime(635): at android.net.http.Request.addHeader(Request.java:161) 06-16 10:22:31.471: ERROR/AndroidRuntime(635): at android.net.http.Request.addHeaders(Request.java:179) 06-16 10:22:31.471: ERROR/AndroidRuntime(635): at android.net.http.Request.<init>(Request.java:132) 06-16 10:22:31.471: ERROR/AndroidRuntime(635): at android.net.http.RequestQueue.queueRequest(RequestQueue.java:480) 06-16 10:22:31.471: ERROR/AndroidRuntime(635): at android.net.http.RequestHandle.createAndQueueNewRequest(RequestHandle.java:419) 06-16 10:22:31.471: ERROR/AndroidRuntime(635): at android.net.http.RequestHandle.setupRedirect(RequestHandle.java:195) 06-16 10:22:31.471: ERROR/AndroidRuntime(635): at android.webkit.LoadListener.doRedirect(LoadListener.java:1216) 06-16 10:22:31.471: ERROR/AndroidRuntime(635): at android.webkit.LoadListener.handleMessage(LoadListener.java:220) 06-16 10:22:31.471: ERROR/AndroidRuntime(635): at android.os.Handler.dispatchMessage(Handler.java:99) 06-16 10:22:31.471: ERROR/AndroidRuntime(635): at android.os.Looper.loop(Looper.java:123) 06-16 10:22:31.471: ERROR/AndroidRuntime(635): at android.webkit.WebViewCore$WebCoreThread.run(WebViewCore.java:471) 06-16 10:22:31.471: ERROR/AndroidRuntime(635): at java.lang.Thread.run(Thread.java:1060) the code i am using is webview = (WebView)findViewById(R.id.generalwebview); webview.getSettings().setJavaScriptEnabled(true); webview.setWebViewClient(new WebViewClient() { public boolean shouldOverrideUrlLoading(WebView view, String url) { Log.i("ReserveBooking", "Processing webview url click..."); view.loadUrl(url); return true; } public void onPageFinished(WebView view, String url) { Log.i("ReserveBooking", "Finished loading URL: " +url); } public void onReceivedError(WebView view, int errorCode, String description, String failingUrl) { Log.e("ReserveBooking", "Error: " + description); Toast.makeText(ReserveBooking.this, description, Toast.LENGTH_SHORT).show(); } }); webview.loadUrl(utls); and when i changed the emulator, this programs works without any error .Please help me to know the reason why i get this error ,is this error somehow related to cache? ,I shall be glad if someone explains ganesh

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  • Client WCF DataContract has empty/null values from service

    - by Matt
    I have a simple WCF service that returns the time from the server. I've confirmed that data is being sent by checking with Fiddler. Here's the result object xml that my service sends. <s:Envelope xmlns:s="http://schemas.xmlsoap.org/soap/envelope/"> <s:Body> <GetTimeResponse xmlns="http://tempuri.org/"> <GetTimeResult xmlns:a="http://schemas.datacontract.org/2004/07/TestService.DataObjects" xmlns:i="http://www.w3.org/2001/XMLSchema-instance"> <a:theTime>2010-03-26T09:14:38.066372-06:00</a:theTime> </GetTimeResult> </GetTimeResponse> </s:Body> </s:Envelope> So, as far as I can tell, there's nothing wrong on the server end. It's receiving requests and returning results. But on my silverlight client, all the members of the returned object are either null, blank or a default vaule. As you can see the server returns the current date and time. But in silverlight, theTime property on my object is set to 1/1/0001 12:00 AM (default value). Sooo methinks that the DataContracts do not match up between the server and the silverlight client. Here's the DataContract for the server [DataContract] public class Time { [DataMember] public DateTime theTime { get; set; } } Incredibly simple. And here's the datacontract on my silverlight client. [DataContract] public class Time { [DataMember] public DateTime theTime { get; set; } } Literally the only difference is the namespaces within the application. But still the values being returned are null, empty or a .NET default. Thanks for you help!

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  • empty response body in ajax (or 206 Partial Content)

    - by Nikita Rybak
    Hi guys, I'm feeling completely stupid because I've spent two hours solving task which should be very simple and which I solved many times before. But now I'm not even sure in which direction to dig. I fail to fetch static content using ajax from local servers (Apache and Mongrel). I get responses 200 and 206 (depending on the server), empty response text (although Content-Length header is always correct), firebug shows request in red. Javascript is very generic, I'm getting same results even here: http://www.w3schools.com/ajax/tryit.asp?filename=tryajax_first (just change document location to 'http://localhost:3000/whatever') So, it's probably not the cause. Well, now I'm out of ideas. I can also post http headers, if it'll help. Thanks! Response Headers Connection close Date Sat, 01 May 2010 21:05:23 GMT Last-Modified Sun, 18 Apr 2010 19:33:26 GMT Content-Type text/html Content-Length 7466 Request Headers Host localhost:3000 User-Agent Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.6; en-US; rv:1.9.2.3) Gecko/20100401 Firefox/3.6.3 Accept text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8 Accept-Language en-us,en;q=0.5 Accept-Encoding gzip,deflate Accept-Charset ISO-8859-1,utf-8;q=0.7,*;q=0.7 Keep-Alive 115 Connection keep-alive Referer http://www.w3schools.com/ajax/tryit_view.asp Origin http://www.w3schools.com Response Headers Date Sat, 01 May 2010 21:54:59 GMT Server Apache/2.2.14 (Unix) mod_ssl/2.2.14 OpenSSL/0.9.8l DAV/2 mod_jk/1.2.28 Etag "3d5cbdb-fb4-4819c460d4a40" Accept-Ranges bytes Content-Length 4020 Cache-Control max-age=7200, public, proxy-revalidate Expires Sat, 01 May 2010 23:54:59 GMT Content-Range bytes 0-4019/4020 Keep-Alive timeout=5, max=100 Connection Keep-Alive Content-Type application/javascript Request Headers Host localhost User-Agent Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.6; en-US; rv:1.9.2.3) Gecko/20100401 Firefox/3.6.3 Accept text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8 Accept-Language en-us,en;q=0.5 Accept-Encoding gzip,deflate Accept-Charset ISO-8859-1,utf-8;q=0.7,*;q=0.7 Keep-Alive 115 Connection keep-alive Origin null

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  • Concatenate row values T-SQL

    - by Robert
    I am trying to pull together some data for a report and need to concatenate the row values of one of the tables. Here is the basic table structure: Reviews ReviewID ReviewDate Reviewers ReviewerID ReviewID UserID Users UserID FName LName This is a M:M relationship. Each Review can have many Reviewers; each User can be associated with many Reviews. Basically, all I want to see is Reviews.ReviewID, Reviews.ReviewDate, and a concatenated string of the FName's of all the associated Users for that Review (comma delimited). Instead of: ReviewID---ReviewDate---User 1----------12/1/2009----Bob 1----------12/1/2009----Joe 1----------12/1/2009----Frank 2----------12/9/2009----Sue 2----------12/9/2009----Alice Display this: ReviewID---ReviewDate----Users 1----------12/1/2009-----Bob, Joe, Frank 2----------12/9/2009-----Sue, Alice I have found this article describing some ways to do this, but most of these seem to only deal with one table, not multiple; unfortunately, my SQL-fu is not strong enough to adapt these to my circumstances. I am particularly interested in the example on that site which utilizes FOR XML PATH() as that looks the cleanest and most straight forward. SELECT p1.CategoryId, ( SELECT ProductName + ', ' FROM Northwind.dbo.Products p2 WHERE p2.CategoryId = p1.CategoryId ORDER BY ProductName FOR XML PATH('') ) AS Products FROM Northwind.dbo.Products p1 GROUP BY CategoryId; Can anyone give me a hand with this? Any help would be greatly appreciated!

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  • PHP session_write_close() causes empty response

    - by Xeoncross
    When using session_write_close() in a shutdown function at the end of my script - PHP just dies. There is no error logged, response headers (firebug), or data (even whitespace!) returned. I have full PHP error reporting on with STRICT enabled and PHP 5.2.1. My guess is that since session_write_close() is being called after shutdown - some fatal error is being encountered that crashes PHP before it has a chance to send the output or log anything. This only happens on the logout page where I first: ... //If there is no session to delete (not started) if ( ! session_id()) { return; } // Get the session name $name = session_name(); // Delete the session cookie (if exists) if ( ! empty($_COOKIE[$name])) { //Get the current cookie config $params = session_get_cookie_params(); // Delete the cookie from globals unset($_COOKIE[$name], $_SESSION); //Delete the cookie on the user_agent setcookie($name, '', time()-43200, $params['path'], $params['domain'], $params['secure']); } // Destroy the session session_destroy(); ... then 2) do some more stuff 3) issue a redirect and 4) finally, after the whole page is done the register_shutdown_function(); I placed earlier runs and calls session_write_close() which saves the session to the database. The end. Since this blank response only occurs on logout I'm guessing that I'm not restarting the session properly which is causing session_write_close() to die fatally at the end of the script.

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  • WPF Datagrid set the column values only when the row is left

    - by Noam
    Hello I have a simple class. When I use it in winforms binding, whenever I change a value of a cell and leave the cell, the property immediately get changed. Using WPF Datagrid, whenever i change a value of a cell, the property gets set only after I leave the row. That is problematic for me. What am I doing wrong? Here is my code: public class MyClass : IEditableObject, INotifyPropertyChanged { string _name, _lastName; public string Name { get { return _name; } set { _name = value; _lastName = value + " xxx"; OnPropertyChanged("LastName"); MessageBox.Show("Test"); } } private void OnPropertyChanged(string p) { var x = new PropertyChangedEventArgs(p); if (PropertyChanged != null) PropertyChanged(this, x); } public string LastName { get { return _lastName; } set { _lastName = value; } } public void BeginEdit() { } public void CancelEdit() { } public void EndEdit() { } public event PropertyChangedEventHandler PropertyChanged; } public class myBindingList : BindingList<MyClass> { public myBindingList() { AllowNew = true; Add(new MyClass { Name = "noam" }); Add(new MyClass { Name = "yael" }); } }

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  • force delete row on django app after migration

    - by unsorted
    After a migration with south, I ended up deleting a column. Now the current data in one of my tables is screwed up and I want to delete it, but attempts to delete just result in an error: >>> d = Degree.objects.all() >>> d.delete() Traceback (most recent call last): File "<console>", line 1, in <module> File "C:\Python26\lib\site-packages\django\db\models\query.py", line 440, in d elete for i, obj in izip(xrange(CHUNK_SIZE), del_itr): File "C:\Python26\lib\site-packages\django\db\models\query.py", line 106, in _ result_iter self._fill_cache() File "C:\Python26\lib\site-packages\django\db\models\query.py", line 760, in _ fill_cache self._result_cache.append(self._iter.next()) File "C:\Python26\lib\site-packages\django\db\models\query.py", line 269, in i terator for row in compiler.results_iter(): File "C:\Python26\lib\site-packages\django\db\models\sql\compiler.py", line 67 2, in results_iter for rows in self.execute_sql(MULTI): File "C:\Python26\lib\site-packages\django\db\models\sql\compiler.py", line 72 7, in execute_sql cursor.execute(sql, params) File "C:\Python26\lib\site-packages\django\db\backends\util.py", line 15, in e xecute return self.cursor.execute(sql, params) File "C:\Python26\lib\site-packages\django\db\backends\sqlite3\base.py", line 200, in execute return Database.Cursor.execute(self, query, params) DatabaseError: no such column: students_degree.abbrev >>> Is there a simple way to just force a delete? Do I drop the table and then rerun manage.py schemamigration to recreate the table in south?

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  • jQuery getJSON request returning empty on a valid request

    - by mikemike
    I'm trying to grab some JSON from Apple's iTunes JSON service. The request is simple: http://ax.phobos.apple.com.edgesuite.net/WebObjects/MZStoreServices.woa/wa/wsSearch?term=jac&limit=25 If you visit the URL in your browser you will see some well-formed (backed up by jsonlint.com) JSON. When I use the following jQuery to make the request, however, the request finds nothing: $("#soundtrack").keypress(function(){ $.getJSON("http://ax.phobos.apple.com.edgesuite.net/WebObjects/MZStoreServices.woa/wa/wsSearch",{'term':$(this).val(), 'limit':'25'}, function(j){ var options = ''; for (var i = 0; i < j.results.length; i++) { options += '<option value="' + j.results[i].trackId + '">' + j.results[i].artistName + ' - ' + j.results[i].trackName + '</option>'; } $("#track_id").html(options); }); }); Firebug sees the request, but only receives an empty response. Any help would be appreciated here, as I'm at my whits end trying to solve it. You can view the script here: http://rnmtest.co.uk/gd/drives_admin/add_drive (soundtrack input box is at the bottom of the page). Thanks

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  • Jasper report exports empty data in PDF format when there is more data

    - by stanley
    I have a report to be exported in excel, pdf and word using jasper reports. I use xml file as the DataSource for the report, but when the data increases jasper report exports empty file in only for PDF format, when i reduce the data content it export the data available correctly. is there any limitation to pdf size? , how can we manage the size in jasper reports from java? My jrxml is really big, so i cannot add it here, i have added my java code which i use to export the content:- JRAbstractExporter exporter = null; if (format.equals("pdf")) { exporter = new JRPdfExporter(); jasperPrint.setPageWidth(Integer.parseInt( pWidth )); } else if (format.equals("xls")) { exporter = new JRXlsExporter(); } else if (format.equals("doc")) { jasperPrint.setPageWidth(Integer.parseInt( pWidth )); } exporter.setParameter(JRExporterParameter.JASPER_PRINT, jasperPrint); exporter.setParameter(JRExporterParameter.OUTPUT_STREAM, outputStream_); exporter.exportReport(); contents = outputStream_.toByteArray(); response.setContentType("application/"+format); response.addHeader("Content-disposition", "attachment;filename=" + name.toString() + "."+format);

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