单击列本身中的HtmlCommandButton删除HtmlColumn

我在支持bean中生成了一个HtmlCommandButton 。 通过单击该按钮，我想从HtmlDataTable删除一个HtmlColumn ，它也是在烘焙bean中生成的。

MyTest.java

 package com.test; import java.util.ArrayList; import java.util.List; import java.util.Map; import javax.el.MethodExpression; import javax.el.ValueExpression; import javax.faces.bean.ManagedBean; import javax.faces.bean.ViewScoped; import javax.faces.component.UIComponent; import javax.faces.component.UISelectItems; import javax.faces.component.html.HtmlColumn; import javax.faces.component.html.HtmlCommandButton; import javax.faces.component.html.HtmlDataTable; import javax.faces.component.html.HtmlInputText; import javax.faces.component.html.HtmlOutputText; import javax.faces.component.html.HtmlSelectOneMenu; import javax.faces.context.FacesContext; import javax.faces.model.SelectItem; @ManagedBean(name = "MyTest") @ViewScoped public class MyTest { public MyTest() { } private Integer colNos; public Integer getColNos() { return colNos; } public void setColNos(Integer colNos) { this.colNos = colNos; } List objects = new ArrayList(); public List getObjects() { return objects; } public void setObjects(List objects) { this.objects = objects; } Integer countMenu1; Integer countMenu2; public Integer getCountMenu1() { return countMenu1; } public void setCountMenu1(Integer countMenu1) { this.countMenu1 = countMenu1; } public Integer getCountMenu2() { return countMenu2; } public void setCountMenu2(Integer countMenu2) { this.countMenu2 = countMenu2; } HtmlDataTable hdt; public HtmlDataTable getHdt() { return hdt; } public void setHdt(HtmlDataTable hdt) { this.hdt = hdt; } public void createTable() { hdt.getChildren().clear(); hdt.setValueExpression("value", createValueExpression("#{MyTest.tableObjects}", List.class)); hdt.setVar("tobject"); for (int i = 0; i < colNos; i++) { HtmlColumn column = new HtmlColumn(); HtmlCommandButton commandButton = new HtmlCommandButton(); commandButton.setValue("Delete" + i); commandButton.setActionExpression(createMethodExpression("#{MyTest.deleteColumn('" + i + "')}", Void.TYPE, new Class[0])); column.getChildren().add(commandButton); HtmlOutputText htmlOutputText5 = new HtmlOutputText(); htmlOutputText5.setValue("
"); htmlOutputText5.setEscape(false); column.getChildren().add(htmlOutputText5); HtmlInputText htmlInputText = new HtmlInputText(); htmlInputText.setValueExpression("value", createValueExpression("#{tobject.headerName}", String.class)); column.getChildren().add(htmlInputText); HtmlOutputText htmlOutputText1 = new HtmlOutputText(); htmlOutputText1.setValue("
"); htmlOutputText1.setEscape(false); column.getChildren().add(htmlOutputText1); HtmlSelectOneMenu menu1 = new HtmlSelectOneMenu(); menu1.setValue(countMenu1); UISelectItems itemGroup1 = new UISelectItems(); itemGroup1.setValueExpression("value", createValueExpression("#{tobject.dataTypes}", List.class)); menu1.getChildren().add(itemGroup1); column.getChildren().add(menu1); HtmlOutputText htmlOutputText2 = new HtmlOutputText(); htmlOutputText2.setValue("
"); htmlOutputText2.setEscape(false); column.getChildren().add(htmlOutputText2); HtmlSelectOneMenu menu2 = new HtmlSelectOneMenu(); menu2.setValue(countMenu2); UISelectItems itemGroup2 = new UISelectItems(); itemGroup2.setValueExpression("value", createValueExpression("#{tobject.filledBy}", List.class)); menu2.getChildren().add(itemGroup2); column.getChildren().add(menu2); hdt.getChildren().add(column); } } List tableObjects = new ArrayList(); public List getTableObjects() { if (tableObjects.isEmpty()) { TableObject to1 = new TableObject(); to1.setHeaderName(""); List filledBy = new ArrayList(); filledBy.add(new SelectItem(1, "Buyer")); filledBy.add(new SelectItem(2, "Vendor")); to1.setFilledBy(filledBy); List dataTypes = new ArrayList(); dataTypes.add(new SelectItem(1, "String")); dataTypes.add(new SelectItem(2, "Integer")); to1.setDataTypes(dataTypes); tableObjects.add(to1); } return tableObjects; } public void setTableObjects(List tableObjects) { this.tableObjects = tableObjects; } public void deleteColumn(String arg) { hdt.getChildren().remove(Integer.parseInt(arg)); } private ValueExpression createValueExpression(String valueExpression, Class valueType) { FacesContext facesContext = FacesContext.getCurrentInstance(); return facesContext.getApplication().getExpressionFactory().createValueExpression( facesContext.getELContext(), valueExpression, valueType); } private MethodExpression createMethodExpression(String valueExpression, Class valueType, Class[] expectedParamTypes) { FacesContext facesContext = FacesContext.getCurrentInstance(); return facesContext.getApplication().getExpressionFactory().createMethodExpression( facesContext.getELContext(), valueExpression, valueType, expectedParamTypes); } } 

Answer 1

在支持bean中使用HtmlDataTable绑定。

点击动作

 //--- SomeObject selectedObject = (SomeObject) tableComponent.getRowData(); someList.remove(selectedObject); //--