parent

问题 I need to be able to display parent / child rows in a WPF datagrid, the parent are displayed with a plus / minus control which when clicked shows the related children records. In order to do this I basically place a second datagrid inside the parent grids RowDetailsTemplate and a style trigger to flip the detailsvisibility property on each row. e.g. <Grid> <DataGrid AutoGenerateColumns="False" IsReadOnly="True" ItemsSource="source" Margin="10,10,14,14" Name="dataGrid1"

问题 Having a little trouble on this one. I need a way using Jquery/JS to find the HREF attribute of the enclosing link tag: <a href="something.html"><img src="img1.jpg" class="active"></a> I want to target the img by class and find the value of the 1st preceding href attribute. $("img.active").somethingAwesome().attr("href"); Please show me somethingAwesome() ...help? 回答1: $("img.active").parent("a").attr("href") will get the direct parent's href attribute, assuming it's an anchor. If there's any

问题 I have a code with lots of submenus that share the same class name. Here's a structure: .menu .sub-menu .sub-menu .sub-menu .sub-menu .sub-menu .sub-menu .elem .elem .sub-menu Note that .sub-menu may be infinite levels deep. So how do I achieve this: when .elem is clicked, I want to travers the DOM upwards until the top-most .sub-menu is reached and apply a style to it. I am aware of .closest() and .parent() and .find() , but I have no idea if jQuery has such feature such as .topMost(selector

问题 When I want to get, for example, the 3rd level parent of the element I must write $('#element').parent().parent().parent() Is there a more optimal method for this? 回答1: Since parents() returns the ancestor elements ordered from the closest to the outer ones, you can chain it into eq(): $('#element').parents().eq(0); // "Father". $('#element').parents().eq(2); // "Great-grandfather". 回答2: Depends on your needs, if you know what parent your looking for you can use the .parents() selector. E.G:

问题 Found this code in the internet, it was posted years ago, so I just decided to ask here for some clarifications for some lines I don't quite understand. In the mousePressed method, what does he mean by: chessPiece = null is he saying that if the JLabel chessPiece has a image in it then it should be changed to null ? Is chessBoard.findComponentAt(e.getX(), e.getY()) returns the JPanel square? and lastly, when Component c gets its parent, who is the parent? The whole code is below: public class

问题 I have this jQuery: $(this).parent().parent().find(".license_tooltip").stop(true, true).fadeIn(200); The $(this) object is nested within two div s like this: <div> <div> <a href="">$(this) object</a> </div> <div> <a href="">object to fade in</a> </div> </div> Can someone point me in the right direction to making my jQuery more streamlined? The structure presented above is replicated multiple times, so using classes and IDs is impossible. 回答1: You can use a class (or any other selectable

问题 To give a simplified example, I've got the following block repeated on the page lots of times (it's dynamically generated): <div class="box"> <div class="something1"></div> <div class="something2"> <a class="mylink">My link</a> </div> </div> When clicked, I can get to the parent of the link with: $(".mylink").click(function() { $(this).parents(".box").fadeOut("fast"); }); However... I need to get to the <div class="something1"> of that particular parent. Basically, can someone tell me how to

问题 I have a <div> that has many other <div> s within it, each at a different nesting level. Rather than give every child <div> an identifier, I rather just give the root <div> the identifier. Here’s an example: <div class="a" id="a5"> <div class="b"> <div class="c"> <a class="d"> </a> </div> </div> </div> If I write a function in jQuery to respond to class d and I want to find the ID for its parent, class a , how would I do this? I cannot simply do $('.a').attr('id'); , because there are

问题 As the title reveals it, we are writing a Unix-style shell utility U that is supposed to be invoked (in most cases) from bash. How exactly could U change the working directory of bash (or parent in general)? P.S. The shell utility chdir succeeds in doing exactly the same, thus there must be a programmatic way of achieving the effect. 回答1: Don't do this. FILE *p; char cmd[32]; p = fopen("/tmp/gdb_cmds", "w"); fprintf(p, "call chdir(\"..\")\ndetach\nquit\n"); fclose(p); sprintf(cmd, "gdb -p %d

问题 I'm having issues on building a tree starting from a table. I'm following the tutorial from D.Fontaine but something is wrong in my query. here is a subset of rows from this table: abs=# select * from myproj_loparentrelation where root_id = '57b2e67b-5862-499a-a471-0f2f6b23440e' order by level ASC; id | root_id | level | display_sequence | lo_id | parent_id --------+--------------------------------------+-------+------------------+--------------------------------------+-----------------------