复选框数据表素数不起作用

素

数库的复选框数据表对我不起作用，我试图制作与素数展示相同的代码，但是当我检查一些行并单击查看按钮时，选定的Cars[]包含0行：这是我的XHTML页面：

    <?xml version="1.0" encoding="UTF-8"?>
<!--
To change this template, choose Tools | Templates
and open the template in the editor.
-->
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml"
      xmlns:h="http://java.sun.com/jsf/html"
      xmlns:p="http://primefaces.org/ui"
      xmlns:f="http://java.sun.com/jsf/core">
    <h:head>
        <title>TODO supply a title</title>
    </h:head>
    <h:body>
        <h:form id="form"> 
            <p:dataTable id="multiCars" var="car" value="#{fortest.mediumCarsModel}" paginator="true" rows="10"  
                         selection="#{fortest.selectedCars}">  
                <f:facet name="header">  
                    Checkbox Based Selection  
                </f:facet>  
                <p:column selectionMode="multiple" style="width:18px" />  
                <p:column headerText="id">  
                    #{car.id}  
                </p:column>  
                <p:column headerText="date envoi">  
                    #{car.dateEnvoi}  
                </p:column>  
                <p:column headerText="decision" >  
                    #{car.decision}  
                </p:column>  
                <f:facet name="footer">  
                    <p:commandButton id="multiViewButton" value="View" icon="ui-icon-search"  
                                     update=":form:displayMulti" oncomplete="multiCarDialog.show()"/>  
                </f:facet>  
            </p:dataTable>  
            <p:dialog id="multiDialog" header="Car Detail" widgetVar="multiCarDialog"  
                      height="300" showEffect="fade" hideEffect="explode">  
                <p:dataList id="displayMulti"  
                            value="#{fortest.selectedCars}" var="selectedCar">  
                    id : #{selectedCar.id}, dateEnvoi #{selectedCar.dateEnvoi}  
                </p:dataList>  
            </p:dialog>  
        </h:form>
    </h:body>
</html>

这是我管理的豆子：

    @ManagedBean
@SessionScoped
public class fortest implements Serializable {
    private Commande[] selectedCars;
    private dortestDataModel mediumCarsModel; 
    utilisateursHelper uh;
    /**
     * Creates a new instance of fortest
     */
    public fortest() {
        uh = new utilisateursHelper();
        mediumCarsModel = new dortestDataModel(uh.getAllCommandes());
    }
    public void setSelectedCars(Commande[] selectedCars) {
        System.out.println("alors je suis donc la size : "+selectedCars.length);
        this.selectedCars = selectedCars;
    }
    public Commande[] getSelectedCars() {
        return selectedCars;
    }
    public dortestDataModel getMediumCarsModel() {
        return mediumCarsModel;
    }
}

这是我的数据模型：

   public class dortestDataModel extends ListDataModel<Commande> implements SelectableDataModel<Commande> {    
    utilisateursHelper uh;
    public dortestDataModel() {  
    }  
    public dortestDataModel(List<Commande> data) {  
        super(data);  
        uh = new utilisateursHelper();
    }  
    @Override  
    public Commande getRowData(String rowKey) {  
        //In a real app, a more efficient way like a query by rowKey should be implemented to deal with huge data  

        List<Commande> cars = (List<Commande>) uh.getAllCommandes();  
        for(Commande car : cars) {  
            if(car.getId().equals(rowKey))  
                return car;  
        }  
        return null;  
    }  
    @Override  
    public Object getRowKey(Commande car) {  
        return car.getId();  
    }  
}

你

有什么想法吗，提前谢谢你

你忘了像这样将rowCheckListener附加到你的数据表

  <p:ajax event="rowSelectCheckbox" listener="#{forTest.check}"   />

下面的代码对我有用。我能够在对话框中看到ID和决定。

XHTML：我不太实现可选数据模型，我只是使用了数据表的rowKey属性，你也可以使用它

<h:form id="form"> 
    <p:dataTable id="multiCars" var="car" value="#{forTest.carList}" paginator="true" rows="10"  
                  rowKey ="#{car.id}" selection="#{forTest.selectedCars}" >  
      <p:ajax event="rowSelectCheckbox" listener="#{forTest.check}"   />  
        <f:facet name="header">  
            Checkbox Based Selection  
        </f:facet>  
        <p:column selectionMode="multiple" style="width:18px" />  
        <p:column headerText="id">  
            #{car.id}  
        </p:column>  
          <p:column headerText="decision" >  
            #{car.decision}  
        </p:column>  
        <f:facet name="footer">  
            <p:commandButton id="multiViewButton" value="View" icon="ui-icon-search"  
                             update=":form:displayMulti" oncomplete="multiCarDialog.show()"/>  
        </f:facet>  
    </p:dataTable>  
    <p:dialog id="multiDialog" header="Car Detail" widgetVar="multiCarDialog"  
              height="300" showEffect="fade" hideEffect="explode">  
        <p:dataList id="displayMulti"  
                    value="#{forTest.selectedCars}" var="selectedCar">  
            id : #{selectedCar.id}, dateEnvoi #{selectedCar.decision}  
        </p:dataList>  
    </p:dialog>  
</h:form>

托管豆：

package managedbeans;
import java.io.Serializable;
import java.util.ArrayList;
import java.util.List;
import javax.faces.bean.ManagedBean;
import javax.faces.bean.SessionScoped;
import javax.jws.Oneway;
import org.primefaces.event.SelectEvent;
import beans.Car;

    @ManagedBean(name="forTest")
    @SessionScoped
    public class forTest implements Serializable {
         private List<Car> carList = new ArrayList<Car>();
         private Car selectedCars[];
        public Car[] getSelectedCars() {
            return selectedCars;
        }
        public void setSelectedCars(Car selectedCars[]) {
            this.selectedCars = selectedCars;
        }
        public List<Car> getCarList() {
            if(carList.size()==0) {
                setCarList();
            }
            return carList;
        }
        public void setCarList() {
            this.carList.add(new Car(1, "car1"));
            this.carList.add(new Car(2, "car2"));
            this.carList.add(new Car(3, "car3"));
        }
        public void check(SelectEvent event) {
            System.out.println("in check");
        }

    }

删除以下内容：

<p:dialog id="multiDialog" header="Car Detail" widgetVar="multiCarDialog"  
          height="300" showEffect="fade" hideEffect="explode">  
    <p:dataList id="displayMulti"  
                value="#{forTest.selectedCars}" var="selectedCar">  
        id : #{selectedCar.id}, dateEnvoi #{selectedCar.decision}  
    </p:dataList>  
</p:dialog>

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