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nitin sharma
VF page with SelectList options
Hi I am trying to understand below given code from teh visual force book.I am stuck at one place and i do not find information on that.
I am struggling to understand the lines underlined in the code:-
1) What does filterid signify here.I assume it should either be a method of the case class or some variable.I am not sure what it s.if it is one of these then where can I get information about them.
<apex:selectList value="{!filterId}" size="1">
2) I do not understand {!listviewoptions} options .Can somebody please help?
<apex:selectOptions value="{!listviewoptions}"/>
<apex:page standardController="Case" recordSetvar="cases">
<apex:pageBlock>
<apex:form id="theForm">
<apex:panelGrid columns="2">
<apex:outputLabel value="View:"/>
<apex:selectList value="{!filterId}" size="1">
<apex:actionSupport event="onchange" rerender="list"/>
<apex:selectOptions value="{!listviewoptions}"/>
</apex:selectList>
</apex:panelGrid>
<apex:pageBlockSection>
<apex:dataList var="c" value="{!cases}" id="list">
{!c.subject}
</apex:dataList>
</apex:pageBlockSection>
</apex:form>
</apex:pageBlock>
</apex:page>
I am struggling to understand the lines underlined in the code:-
1) What does filterid signify here.I assume it should either be a method of the case class or some variable.I am not sure what it s.if it is one of these then where can I get information about them.
<apex:selectList value="{!filterId}" size="1">
2) I do not understand {!listviewoptions} options .Can somebody please help?
<apex:selectOptions value="{!listviewoptions}"/>
<apex:page standardController="Case" recordSetvar="cases">
<apex:pageBlock>
<apex:form id="theForm">
<apex:panelGrid columns="2">
<apex:outputLabel value="View:"/>
<apex:selectList value="{!filterId}" size="1">
<apex:actionSupport event="onchange" rerender="list"/>
<apex:selectOptions value="{!listviewoptions}"/>
</apex:selectList>
</apex:panelGrid>
<apex:pageBlockSection>
<apex:dataList var="c" value="{!cases}" id="list">
{!c.subject}
</apex:dataList>
</apex:pageBlockSection>
</apex:form>
</apex:pageBlock>
</apex:page>
value="foo" may be (depending on visualforce element):
- class property (public List<Opportunity> { get; set; }),
- class member (public final static String foo = 'foo';),
- class method (private Boolean getFoo() {...}).
In this case selectLists value is an list of SelectOption objects. And listviewoption is a String class property with setter.
(And more! Each time a select list value changes on page, property takes this new value. So you can assign values to a class properties throug page.)
select list and selection options together are used for creating picklist field.
<apex:selectList value="{!filterId}" size="1">
<apex:actionSupport event="onchange" rerender="list"/>
<apex:selectOptions value="{!listviewoptions}"/>
</apex:selectList>
The varibale 'listviewoptions' will all the picklist values in controller. and variable 'filterId' will hold the picklist value which you select in VF page.
thanks,
http://www.forcexplore.com/2014/07/wrapper-class-in-salesforce.html