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• Fastest way of creating XML from parent-child table in c#?

  - by rudnev

  Assume we have some DataTable or IEnumerable with ChildID, ParentID and Title. We need to serialize it to XML like <Entity title=""> <Entity title=""></Entity> <Entity title=""></Entity> </Entity> As i found out, standard DataTable.GetXML() returns something different. I thought about initializing class tree like Entity e = new Entity(ID, Title, ParentEntityID) and then serializing it. Table is about 3000 elems. Is there faster way?

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• Why can't I SELECT a parent field that doesn't have a child?

  - by myaccount

  (rest_branches) is the table of restaurants. (phone_numbers) is another table which contains the restaurants phone_numbers, and it has a field called (branch_id) which references the restaurant id. When I try: SELECT * FROM rest_branches NATURAL JOIN phone_numbers I only get the restaurants which have a phone_number. What should I do to get all restaurants even if they don't have a phone number?

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• How to detect defunct processes on Linux?

  - by Hakan

  I have a parent and a child process written in C language. Somewhere in the parent process HUP signal is sent to the child. I want my parent process to detect if the child is dead. But when I send SIGHUP, the child process becomes a zombie. How can I detect if the child is a zombie in the parent process? I try the code below, but it doesn't return me the desired result since the child process is still there but it is defunct. kill(childPID, 0); One more question; can I kill the zombie child without killing the parent? Thanks.

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• What happens to a SIGINT (^C) when sent to a perl script containing children?

  - by CmdrGuard

  I have a Perl script that forks. Each fork runs an external program, parses the output, and converts the output to a Storable file. The Storable files are then read in by the parent and the total data from each of the children are analyzed before proceeding onto a repeat of the previous fork or else the parent stops. What exactly happens when I issue a ^C while some of the children are still running the external program? The parent perl script was called in the foreground and, I presume, remained in the foreground despite the forking. Is the SIGINT passed to all children, that is, the parent, the parent's children, and the external program called by the children??

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• outer join for parent child chain

  - by dotnetcoder

  Considering below tables and relationships: parent --1:Many-- children --1:Many-- shubchildren Parent may or many not have children records. children always have subchildren records. I wan to write a qiery to select parent names where any if matched parent.name,children.name or subchildren.name Here i understand I have to do a left outer join between parent and children. But what kind of join should I put between children and subchildren ?

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• Window parent not working in IE 8

  - by archana roy

  I have a parent page and a child page. By using window.opener.parent property,I am able to read the parent page content and display it in the child page.(There is a PREVIEW button on parent page,on click of which the child page opens up as a popup and displays the content of parent page controls.) This functionality was working fine in IE7/Mozilla/IE6 but I am unable to locate why its not workin with IE8. Can anyone please help?

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• Nature of Lock is child table while deletion(sql server)

  - by Mubashar Ahmad

  Dear Devs From couple of days i am thinking of a following scenario Consider I have 2 tables with parent child relationship of kind one-to-many. On removal of parent row i have to delete the rows in child those are related to parents. simple right? i have to make a transaction scope to do above operation i can do this as following; (its psuedo code but i am doing this in c# code using odbc connection and database is sql server) begin transaction(read committed) Read all child where child.fk = p1 foreach(child) delete child where child.pk = cx delete parent where parent.pk = p1 commit trans OR begin transaction(read committed) delete all child where child.fk = p1 delete parent where parent.pk = p1 commit trans Now there are couple of questions in my mind Which one of above is better to use specially considering a scenario of real time system where thousands of other operations(select/update/delete/insert) are being performed within a span of seconds. does it ensure that no new child with child.fk = p1 will be added until transaction completes? If yes for 2nd question then how it ensures? do it take the table level locks or what. Is there any kind of Index locking supported by sql server if yes what it does and how it can be used. Regards Mubashar

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• Help me re-center a ModalPopup within an iframe when the iframe's parent window scrolls

  - by Cory Larson

  I have a web page with an iframe in it (I don't like it, but that's the way it has to be). It's not a cross-domain iframe so there's nothing to worry about there. I have written a jQuery extension that does the centering of a ModalPopup (which is called from an overridden AjaxControlToolkit.ModalPopupBehavior._layout method) based on the width and height of the iframe's parent, so that it looks centered even though the iframe is not in the center of the page. It's a lot of tricky stuff, especially since the web page I added the iframe to runs in quirks mode. Now, I've also overridden AjaxControlToolkit.ModalPopupBehavior._attachPopup, so that when the parent window resizes or scrolls, the ModalPopup inside of the iframe recenter's itself relative to the new size of the parent window. However, the same code that attaches the popup to the parent window's resize event does NOT work for the parent window's scroll event. See the code below, and the comments: AjaxControlToolkit.ModalPopupBehavior.prototype._attachPopup = function() { /// <summary> /// Attach the event handlers for the popup to the PARENT window /// </summary> if (this._DropShadow && !this._dropShadowBehavior) { this._dropShadowBehavior = $create(AjaxControlToolkit.DropShadowBehavior, {}, null, null, this._popupElement); } if (this._dragHandleElement && !this._dragBehavior) { this._dragBehavior = $create(AjaxControlToolkit.FloatingBehavior, {"handle" : this._dragHandleElement}, null, null, this._foregroundElement); } $addHandler(parent.window, 'resize', this._resizeHandler); // <== This WORKS $addHandler(parent.window, 'scroll', this._scrollHandler); // <== This DOES NOT work this._windowHandlersAttached = true; } Can anybody explain to me why the resize event works while the scroll event doesn't? Any suggestions or alternatives out there to help me out? I am working with jQuery, so if I can use something besides the $addHandler method from MS that'd be fine. Be aware that I also have to override the _detachPopup function to remove the handler, so I need to take that into account. Thanks!

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• NHibernate tutorial #6 - Parent-Child Relationships

  - by BobPalmer

  I've finally had a chance to continue my NHibernate tutorial series after a series of vacations and events.  In this tutorial, I cover one of the most common relationships, that of the parent-child, in NHibernate.  I also go through some optimization refactoring along the way. You can view the entire Google Docs article here: http://docs.google.com/Doc?docid=0AUP-rKyyUMKhZGczejdxeHZfMzBmdjdzZDlkaA&hl=en   As always, feedback is appreciate! -Bob

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• Parent-child hierarchies and unary operators in PowerPivot

  - by Marco Russo (SQLBI)

  Alberto wrote an excellent post describing how to implement the Unary Operator feature (which is present in Analysis Services) in PowerPivot (there was a previous post about parent-child hierarchies, too). I have to say that the solution is not so easy to implement as in Analysis Services, but it just works and, from a practical point of view, it is not so difficult to implement if you understand how it works and accept its limitations (only sum and subtractions are supported). I think that many...(read more)

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• How to set path of Virtual PC hard disk differencing parent

  - by Barry Kelly

  I have an old Windows XP Mode vhd backed up from my previous system, but I'm having difficulty getting it running on the new system. The vhd is a differencing disk, and its parent is the standard Windows XP Mode base; I still have the old parent, and have verified it is binary identical to the XP Mode base in my new installation of XP Mode. But in the new system, the path to the differencing disk parent is different than the old. When I open up the settings for the .vmcx for my old XP mode, and select "Hard Disk 1", the "Virtual hard disk file" is set correctly, but the "Parent Disk:" field is pointing at the wrong path, and I can't see any way to edit it. Does anyone know how?

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• git rewrite commit parent?

  - by IttayD

  I have two commits based on some parent: P - A - B I'd like for them to be based on another parent: P' - A' - B'

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• MongoDB - how to join parent and child products by reference

  - by Jaro

  my mongo collection stores products. There are two product types: child and parent. Parent product holds array of its child as reference. Use case: use mydb; child1 = { _id: 1, name: "Child 1", is_child: true, is_parent: false, children : [] } child2 = { _id: 2, name: "Child 2", is_child: true, is_parent: false, children : [] } parent = { _id: 3, name: "Parent product", is_child: false, is_parent: true, children : [1, 2] } db.product.insert( [child1, child2, parent] ); And I'm looking for any query returning { _id: 3, name: "Parent product", is_child: false, is_parent: true, children: [ { _id: 1, name: "Child 1", is_child: true, is_parent: false, children : [] }, { _id: 2, name: "Child 2", is_child: true, is_parent: false, children : [] } ] } I'm newbie to mongodb, but I guess an usage of map-reduce could solve the problem. Can anyone advice? Thx

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• Please Help Me Install Firestorm?

  - by Elle Caszatt

  I have been trying for hours just to install one program. In this time, I've tried my best to follow directions and not screw everything up but I have. I'm new to Linux. I tried to install Firestorm and this is what happened: parent@ubuntu:~$ sudo '/home/parent/Downloads/Phoenix_Firestorm-Release_i686_4.2.1.29803/install.sh' [sudo] password for parent: Enter the desired installation directory [/opt/firestorm-install]: /home/parent/downloads - Installing to /home/parent/downloads /home/parent/Downloads/Phoenix_Firestorm-Release_i686_4.2.1.29803/install.sh: line 80: /home/parent/downloads/etc/refresh_desktop_app_entry.sh: Permission denied parent@ubuntu:~$ sudo opt/firestorm-install sudo: opt/firestorm-install: command not found parent@ubuntu:~$ ./etc/refresh_desktop_app_entry.sh bash: ./etc/refresh_desktop_app_entry.sh: No such file or directory parent@ubuntu:~$ sudo '/home/parent/Downloads/Phoenix_Firestorm-Release_i686_4.2.1.29803/install.sh' Enter the desired installation directory [/opt/firestorm-install]: /home/parent - Backing up previous installation to /home/parent.backup-2012-08-27 - Installing to /home/parent cp: cannot stat `/home/parent/Downloads/Phoenix_Firestorm-Release_i686_4.2.1.29803/*': No such file or directory Failed parent@ubuntu:~$ Now whenever I go into my files it says it can't find anything. Like Cannot find home/parent/Downloads. Now, I KNOW there are downloads. I don't know why it's doing this all of a sudden. I'm so frustrated that I'm ready to just go back to Windows. I've already had to uninstall/reinstall Ubuntu once today. It's looking like I"m going to have to do it again. How can I fix my file problem that I'm now having and can someone please, please tell me how to install Firestorm? I mean they don't even have their repository listed. It's ridiculous to have to go through this over a program. Spotify wasn't hard at all to install so why is this? Someone please help, and I'm sorry if I sound like a total idiot. I'm pretty tech savvy but I'm honestly pretty upset after struggling with this for hours. Edit Okay, I see the problem with the directory files (showing the error I mentioned above when I try to click on them). I can only access my downloads, desktop, ect, through the backup that was created when I tried to install Firestorm. It's like that's the real home now. How can I get it back to the way it was? Edit Ubuntu has stopped working for me on reboot now. It doesn't go past the login screen. This is exactly what happened when I had to uninstall it before after trying to install Firestorm. Maybe I'm giving up too easily but I think I'm just going to go back to Windows. If this is what's going to happen every time I innocently try to install a program then it's just not worth it. I installed it specifically to run Firestorm because Windows sucks up a lot of CPU and causes lag. I still appreciate any input but this is just too much hassle for something that shouldn't be hard.

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• How to pass value from child window to parent window without refreshing the page using MasterPage

  - by Suthish Nair

  Parent Window (1.aspx) <asp:Content ID="Content1" ContentPlaceHolderID="head" Runat="Server"> <script type ="text/javascript"> function popup() { window.open('2.aspx', '', "height=500, width=500,resizable=no, toolbar =no"); } </script> </asp:Content> <asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" Runat="Server"> Text Box1:&nbsp;<asp:TextBox ID...(read more)

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• New Window Via JavaScript Clears Parent

  - by Bunch

  This is not a new item at all but I came across it recently. For an app I had been using some JavaScript like: javascript:window.open(someurl.aspx here) to open a new window via a button. That bit of code had been working great in several other apps. Then in one app that same code decided to open the new window correctly while clearing the parent of everything but [object]. The fix ended up being simple, change the javascript to: javascript:void(window.open(someurl.aspx here); Then it worked like I thought it should. Tags: ASP.Net, JavaScript

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• SOLVED: Breaking parent web.config dependencies in sub applications

  This article explains how to implement a sub application such as a blog in your website without experiencing dependency issues. A common problem that developers experience is when their sub applications accidentally inherit requirements of the parent website. This is actually by design but read on if this is causing problems in your site. Scenario This problem has caught me out a couple of times so far but usually with enough of a gap between occurrences that it had become just a fuzzy memory....Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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• How to access parent window in dialog

  - by Bruce

  I am using Quickly and created the main window and a dialog. In the main window I am setting access to database (u1db) in the finish_initializing method (self.db=...). After an action I open a dialog where I need access to the database. I thought that I can use self.get_parent() in the dialog to get instance of the main window and access the database, but return value of the get_parent() is None. My question is, how can I access the instance of the parent window in the dialog or perhaps where should I place the instance of the database wrapper? Shortened code: class GuitestWindow(Window): def finish_initializing(self, builder): ... self.db = u1db.open( db_path, create=True ) def on_addaccountbutton_clicked(self, widget): dialog = NewAccountDialog.NewAccountDialog() result = dialog.run() dialog.hide()

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• TSQL Cascade delete for child records?

  - by ElHaix

  I have a parent/child table (simple tree) table structure (ID, ParentID), where I want to delete (and get the ID of) all children for a given parent ID - similar to this post http://stackoverflow.com/questions/1433808/sql-server-cascade-delete-and-parent-child-table . During the loop, where I've got the current ID, I will also be performing other actions with this ID. Can someone give me an example of the SPROC to accomplish this? Thanks

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• jQuery: hover (mouseleave event fired when mouse is over child)

  - by CronosS

  Hi, I want to create a zoom effect on some thumbs. Here is my javascript simplified code : parent.hover( function(){ parent.stop().animate({/* css */}, inputZoomDuration, "linear"); wrapper.stop().animate({/* css */}, inputZoomDuration, "linear"); child.stop().animate({/* css */}, inputZoomDuration, "linear"); }, function(){ alert("leave"); child.stop().animate({/* css */}, 140, "linear"); wrapper.stop().animate({/* css */}, 140, "linear"); parent.stop().animate({/* css */}, 140, "linear"); } ); and the html is like : <div parent> <div wrapper> <div child> </div> </div> </div> I increase the size of all my divs when I over the "parent". But a soon as I over (or leave, btw) one of the child, the alert appears. Without the alert, the result is a very bugy animation. Is there any way to prevent the mouseleave event to be fired when a child is overed? Best regards, thanks.

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• Foreign key not stored in child entity (one-to-many)

  - by Kamil Los

  Hi, I'm quite new to hibernate and have stumbled on this problem, which I can't find solution for. When persisting parent object (with one-to-many relationship with child), the foreign-key to this parent is not stored in child's table. My classes: Parent.java @javax.persistence.Table(name = "PARENT") @Entity public class PARENT { private Integer id; @javax.persistence.Column(name = "ID") @Id @GeneratedValue(strategy=GenerationType.AUTO) public Integer getId() { return id; } public void setId(Integer id) { this.id = id; } private Collection<Child> children; @OneToMany(mappedBy = "parent", fetch = FetchType.EAGER, cascade = {CascadeType.ALL}) @Cascade({org.hibernate.annotations.CascadeType.ALL}) public Collection<Child> getChildren() { return children; } public void setChildren(Collection<Child> children) { this.children = children; } } Child.java @javax.persistence.Table(name = "CHILD") @Entity @IdClass(Child.ChildId.class) public class Child { private String childId1; @Id public String getChildId1() { return childId1; } public void setChildId1(String childId1) { this.childId1 = childId1; } private String childId2; @Id public String getChildId2() { return childId2; } public void setChildId2(String childId2) { this.childId2 = childId2; } private Parent parent; @ManyToOne @javax.persistence.JoinColumn(name = "PARENT_ID", referencedColumnName = "ID") public Parent getParent() { return parent; } public void setParent(Operation parent) { this.parent = parent; } public static class ChildId implements Serializable { private String childId1; @javax.persistence.Column(name = "CHILD_ID1") public String getChildId1() { return childId1; } public void setChildId1(String childId1) { this.childId1 = childId1; } private String childId2; @javax.persistence.Column(name = "CHIILD_ID2") public String getChildId2() { return childId2; } public void setChildId2(String childId2) { this.childId2 = childId2; } public ChildId() { } @Override public boolean equals(Object o) { if (this == o) return true; if (o == null || getClass() != o.getClass()) return false; ChildId that = (ChildId) o; if (childId1 != null ? !childId1.equals(that.childId1) : that.childId1 != null) return false; if (childId2 != null ? !childId2.equals(that.childId2) : that.childId2 != null) return false; return true; } @Override public int hashCode() { int result = childId1 != null ? childId1.hashCode() : 0; result = 31 * result + (childId2 != null ? childId2.hashCode() : 0); return result; } } } Test.java public class Test() { private ParentDao parentDao; public void setParentDao(ParentDao parentDao) { this.parentDao = parentDao; } private ChildDao childDao; public void setChildDao(ChildDao childDao) { this.childDao = parentDao; } test1() { Parent parent = new Parent(); Child child = new Child(); child.setChildId1("a"); child.setChildId2("b"); ArrayList<Child> children = new ArrayList<Child>(); children.add(child); parent.setChildren(children); parent.setValue("value"); parentDao.save(parent); //calls hibernate's currentSession.saveOrUpdate(entity) } test2() { Parent parent = new Parent(); parent.setValue("value"); parentDao.save(parent); //calls hibernate's currentSession.saveOrUpdate(entity) Child child = new Child(); child.setChildId1("a"); child.setChildId2("b"); child.setParent(parent); childDao.save(); //calls hibernate's currentSession.saveOrUpdate(entity) } } When calling test1(), both entities get written to database, but field PARENT_ID in CHILD table stays empty. The only workaround I have so far is test2() - persisting parent first, and then the child. My goal is to persist parent and its children in one call to save() on Parent. Any ideas?

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• iFrame content pageviews not matching parent page pageviews

  - by surfbird0713

  I have a page with content hosted in an iFrame, both using the same GA account ID. When I look at the pages report, the parent page has about 9000 unique views, but the iFrame content only has 3700. Anyone have an idea what could cause that kind of discrepancy? My only guess is that it would be caused by people moving on before the iFrame content has a chance to load, but the average time on page for the host page is 56 seconds, so that doesn't seem possible. This is the page in question: http://cookware.lecreuset.com/cookware/content_le-creuset-lid_10151_-1_20002 The flipbook is hosted in the iFrame on a separate domain. I have each page of the flipbook triggering a virtual pageview to try to evaluate engagement with the book - when the flipbook loads, it fires a pageview for the page it is on, so that is the page I'm using for the 3700 number. I also looked at the source of the iFrame in the pages report, and that number just about matches the virtual pageviews so that piece is consistent. Any ideas on this are much appreciated. Thanks!

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• Centring an HTML element relative to its parent when its width is greater than its parent. [closed]

  - by casr

  I mocked up my intended outcome. So the blue element is the main content of the website and the yellow element represents something like a diagram or an image that has a greater width than the blue element. Ideally, I would like a purely CSS solution that is able to deal with various sizes of images. I have tried various things but have failed so far. I hope you can help! Here’s some example markup to set you on your way. <!DOCTYPE HTML> <html> <head> <title>Example</title> <style> #el1 { display: block; margin: 0 auto; width: 30em; background-color: #8cabde } #el2 { /* works when the width is less than the parent */ display: block; margin: 0 auto; } </style> </head> <body> <article id=el1> <p>Some content above.</p> <img id=el2 src=http://i.imgur.com/JFfGG.gif title=spaceball width=600 height=400> <p>Some content below.</p> </article> </body> </html>

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• Obtain reference to Parent object during instantiation

  - by GoldBishop

  I have a situation where a custom class is a property of another class. What i need to be able to do, if it is possible at all, is obtain a reverse to the "parent" class (ie the the class that holds the current class as a property). For Instance: Public Class Class1 ... public readonly property Prop11 as Class2 public property Prop12 as String ... End Class Public Class Class2 ... private _par as Class1 private _var21 as string ... Public Sub New(...) me._par = ???? ... End Sub public readonly property Prop21 as string Get return me._par.Prop12 & me._var21 End Get End Property ... End Class Ultimately, i am trying to access other properties within Class1 from Class2 as they do have substance for information from within Class2. There are several other classes within Class1 that provide descriptive information to other classes contained within it as properties but the information is not extensible to all of the classes through Inheritance, as Class1 is being used as a resource bin for the property classes and the application itself. Diagram, lazy design ;): Application <- Class1.Prop12 Application <- Class1.Prop11.Prop21 Question: Is it possible to get a recursion through this design setup?

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• Multithreading: Communication from Parent thread to child thread

  - by Dennis Nowland

  I have a List of threads normally 3 threads each of the threads reference a webbrowser control that communicates with the parent control to populate a datagridview. What I need to do is when the user clicks the button in a datagridviewButtonCell corresponding data will be sent back to the webbrowser control within the child thread that originally communicated with the main thread. but when I try to do this I receive the following error message 'COM object that has been separated from its underlying RCW cannot be used.' my problem is that I can not figure out how to reference the relevant webbrowser control. I would appreciate any help that anyone can give me. The language used is c# winforms .Net 4.0 targeted Code sample: The following code is executed when user click on the Start button in the main thread private void StartSubmit(object idx) { /* method used by the new thread to initialise a 'myBrowser' inherited from the webbrowser control each submitters object is an a custom Control called 'myBrowser' which holds detail about the function of the object eg: */ //index: is an integer value which represents the threads id int index = (int)idx; //submitters[index] is an instance of the 'myBrowser' control submitters[index] = new myBrowser(); //threads integer id submitters[index]._ThreadNum = index; // naming convention used 'browser' +the thread index submitters[index].Name = "browser" + index; //set list in 'myBrowser' class to hold a copy of the list found in the main thread submitters[index]._dirs = dirLists[index]; // suppress and javascript errors the may occur in the 'myBrowser' control submitters[index].ScriptErrorsSuppressed = true; //execute eventHandler submitters[index].DocumentCompleted += new WebBrowserDocumentCompletedEventHandler(DocumentCompleted); //advance to the next un-opened address in datagridview the navigate the that address //in the 'myBrowser' control. SetNextDir(submitters[index]); } private void btnStart_Click(object sender, EventArgs e) { // used to fill list<string> for use in each thread. fillDirs(); //connections is the list<Thread> holding the thread that have been opened //1 to 10 maximum for (int n = 0; n < (connections.Length); n++) { //initialise new thread to the StartSubmit method passing parameters connections[n] = new Thread(new ParameterizedThreadStart(StartSubmit)); // naming convention used conn + the threadIndex ie: 'conn1' to 'conn10' connections[n].Name = "conn" + n.ToString(); // due to the webbrowser control needing to be ran in the single //apartment state connections[n].SetApartmentState(ApartmentState.STA); //start thread passing the threadIndex connections[n].Start(n); } } Once the 'myBrowser' control is fully loaded I am inserting form data into webforms found in webpages loaded via data enter into rows found in the datagridview. Once a user has entered the relevant details into the different areas in the row the can then clicking a DataGridViewButtonCell that has tha collects the data entered and then has to be send back to the corresponding 'myBrowser' object that is found on a child thread. Thank you

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