event-handling

问题 I have a "cart" Repeater , where every item has a couple of controls in it. The ones we're focusing on are two DropDownLists , a LinkButton and a TextBox . The lists are on one validation group and the button & textbox are on another. Both lists have an OnSelectedIndexChanged event handler which does some calculations based on the selections in both DropDownLists . Both lists also have AutoPostBack="True" . The button has an OnClick handler which also does some calculations according to the

问题 I have a problem with an event handler used to resort a table with the tab key putting an input cel or an select box in it to edit data in MySQL The method is captured by the event handler, the key pressed is validated, if TAB, it will continue with data validation if valid, it reach the database to uptade search for the next valid cell to insert either an nput or a select box. The problem is that the code is not working in Firefox. When the row ends and it have to insert the select box the

问题 I have a ListViewItem which has an Eventhandler attatched and inside the ControlTemplate of the ListViewItem is a Button which does something different. But if I click the Button , the Behaviour is like I clicked on the ListViewItem . AppointmentOverview.xaml: <Window.Resources> <Style TargetType="{x:Type ListViewItem}" BasedOn="{StaticResource NormalListViewItem}"> <EventSetter Event="PreviewMouseLeftButtonDown" Handler="ListViewItem_PreviewMouseLeftButtonDown" /> </Style> </Window.Resources

问题 I have the structure of components (nested) that seems like this: Container ComponentA ComponentB ComponentC(want to handle event here with state that lives on container) Do I need to pass as props all the way from Container, ComponentA, ComponentB and finally ComponentC to have this handler? Or is there another way like using Context API? I'm finding a bit hard to handle events with react.js vs vue.js/angular.js because of this. 回答1: I would recommend using either Context API (as you

问题 I dont get the Event Loop with the RabbitMQ CPP (CopernicaMarketingSoftware/AMQP-CPP) Library from https://github.com/CopernicaMarketingSoftware/AMQP-CPP running properly. I have set up a rabbitmq server, and it works fine. My code looks like this: #include <iostream> #include <sys/select.h> #include <cop_amqpcpp.h> #include <cop_amqpcpp/linux_tcp.h> using namespace std; fd_set rfds; class MyTcpHandler : public AMQP::TcpHandler { private: /** * Method that is called when the connection

问题 EDIT: Looks like ANY event is causing angular to re-render the component(ancestor listeners and siblings)...is this a design intent behind ngZone and component interaction? original: I have a web page with an iframe running an Angular deployment. The page (parent to the iframe running angular) looks like it has a blanket click event. I can't seem to find a way to prevent this listener from causing NgZone from triggering angular's ng directives from being evaluated every time the parent event

问题 I have an strange issue. I have a picture box double click event as well as single click event. The problem is even I double click the control, single click event is raised [If I disable single click event, double click event is working]. This problem has been discussed here , but nobody gave a right answer 回答1: Have a derived Picturebox control class class PictureBoxCtrl:System.Windows.Forms.PictureBox { // Note that the DoubleClickTime property gets // the maximum number of milliseconds

问题 I have previously entered value 1111, 1222, and 1333 into a HTML text input. Now if I enter 1 to the text input, it should popup a list with value 1111, 1222, and 1333 as available options. How do you trigger an event when any one of these options is selected? I have a javascript function that performs a calculation on values entered into the text input via "onkeyup" event. This works very well if the user just enter value via keyboard. However, it does not work if the user is selecting a

问题 In the example below, how can you use the event and ui objects to detect which link opened the dialog? Can't seem to get $(event.target).attr("title"); to work properly, and I'm having trouble finding documentation on the 'ui object that is passed. Thanks! $("#dialog_support_option_form").dialog({ link_title = $(event.target).attr("title"); alert(link_title); }); $("a").live("click", function() { btn_rel = $(this).attr("rel"); $(btn_rel).dialog("open"); }); <a class="btn pencil" rel="#dialog

问题 In the example below, how can you use the event and ui objects to detect which link opened the dialog? Can't seem to get $(event.target).attr("title"); to work properly, and I'm having trouble finding documentation on the 'ui object that is passed. Thanks! $("#dialog_support_option_form").dialog({ link_title = $(event.target).attr("title"); alert(link_title); }); $("a").live("click", function() { btn_rel = $(this).attr("rel"); $(btn_rel).dialog("open"); }); <a class="btn pencil" rel="#dialog