parent-child

问题 Question Why is EF first inserting a child object (PersonnelWorkRecord) with a dependency, before the object that it is depended on (TimesheetActivity). Also what are my options on correcting this? ERD (simplified) This is predefined by another system out of my direct control. EF setup and save code I am not sure I understand why/how Entity Framework is inserting the objects I have in the order it does however here is the code I am using to insert a parent and several children. using (var db

问题 Summary I am attempting to add a child view controller to a parent view controller, and have the parent view controller inform the child view controller of rotation events. However, the rotation messages are not being forwarded to the child view controller (which is the default behavior). Why is this default behavior not occurring? Environment: iOS 7, XCode 5, OSX 10.9 Details: I am implementing a custom container view controller following instructions in the Apple Document: "Creating Custom

问题 I am using XML and XQuerie. I usually use an XPath expression relative to a parent node to retrieve its child node. But, I am not sure how to do the opposite meaning if I have a child node, how do I retrieve its parent node. <node id="50> <childnode1 childid="51" /> <childnode2 childid="52" /> </node> If I have the node <childnode1 childid="51" /> , how do I retrieve its parent: <node id="50> 回答1: Short answer : .. This selects the parent of the current (context) node. Longer and more general

问题 I am using XML and XQuerie. I usually use an XPath expression relative to a parent node to retrieve its child node. But, I am not sure how to do the opposite meaning if I have a child node, how do I retrieve its parent node. <node id="50> <childnode1 childid="51" /> <childnode2 childid="52" /> </node> If I have the node <childnode1 childid="51" /> , how do I retrieve its parent: <node id="50> 回答1: Short answer : .. This selects the parent of the current (context) node. Longer and more general

问题 For the last two days, I've been searching for a way to pass mouse events to the widgets behind a widget used as a container/parent for it's children. I know there is a way to make a widget transparent for mouse events like this: QWidget w; w.setAttribute( Qt::WA_TransparentForMouseEvents ); But this also disables the delivery of mouse events to its children! I want the children of the front widget and the widgets behind the front widget to receive the mouse events. Qt::WA

问题 Having finally gotten Dynamic Parallelism up and running, I'm trying to now implement my model with it. It took me a while to figure out that some strange output resulted from needing to use cudaDeviceSynchronize() to make the parent kernel wait for the child kernel to finish. It seems there is something wrong with the device function I defined as arrAdd. Here's a table of outputs before and after each child kernel in the k2 parent kernel. Initially : k1 = { -1 0 0 0 0 } Post arrInit : temp =

问题 Actually i'm building a Website using Wordpress, everything work, but now I need to add some change inside of the functions.php, the original one in the parent folder, so how should I do ? Is it possible to copy everything inside of the functions.php child theme and then add changes ? I don't want to add changes in the parent folder because of future theme updates. But tell me if this is the only one option. EDIT: "Do not copy the full content of functions.php of the parent theme into

问题 I was working on a wepage earlier this week where the 'banner-image' was being cut off the view-port of the screen depending on the browser and size of screen. I thought that by simply converting the Parent Container to 'Height: 100vh' this would make all child elements fit within the parent container that is now set to fit the height of any viewport. This did not work as I intended it to. The banner image was still being cutoff even though the parent container was set to 100vh. Is there a

问题 I'm looking for possible ways to persist the following classes. Subsonic SimpleRepository looks like it might work, and people have said it should, when I asked a more general question. But I've been unable to find a single example of how to do this - or at least one I could understand. Can anyone point me to an example, or tell me how I could use Subsonic to map the following classes to a database? Note that I haven't designed the database - I'm hoping Subsonic will do that for me , lazy sod

问题 This is a Windows Forms / .Net C# question. I have a borderless windows whose transparency key and background color make it completely transparent. Inside the window are a couple of user controls. I want to be able to move the window. I know how to do this on the parent window, but my problem is that the child controls are the only thing visible and thus the only thing click-able. The question is: how can I pass certain messages up to the Parent so the Parent can move when the right mouse