[SalesForce] How to set page size for standard list controller without using extension class

I have a requirement in which I want to avoid involving extension class. The page shows list of account record present in org. I want to set page size for the list of accounts but I don't want to use extension class for this.
Here goes my code

<apex:page standardController="account" recordSetVar="accs" tabstyle="account" >      
<apex:form >
    <apex:param name="q" value="7" assignTo="{!PageSize}"/>
    <apex:pageBlock id="contacts_list">
        <apex:outputPanel style="float:right">
        Filter: 
        <apex:selectList value="{! filterId }" size="1">
            <apex:selectOptions value="{!listViewOptions}"/>
            <apex:actionSupport event="onchange" reRender="contacts_list"/>
        </apex:selectList><br /><br />
        </apex:outputPanel>

        <apex:pageBlockTable value="{!accs}" var="ac" >   
            <apex:column headerValue="name">
                <apex:inputField value="{!ac.name}" />  
            </apex:column>

            <apex:column headerValue="Account Number">
                <apex:inputField value="{!ac.AccountNumber}" />   
            </apex:column>

            <apex:column headerValue="account source">
                <apex:inputField value="{!ac.AccountSource}" />  
            </apex:column>

            <apex:column headerValue="Site">
                <apex:inputField value="{!ac.site}" />
            </apex:column>
        </apex:pageBlockTable>

        <!-- Pagination --><br />
        <table style="width: 100%"><tr> 
            <td>
                Page: <apex:outputText value=" {!IF(CEILING(ResultSize/PageSize)==0,0,PageNumber)} of {!CEILING(ResultSize/PageSize) }"/>               
            </td>            

            <td align="center">
                <apex:commandButton value="|<" action="{!first}" disabled="{!!hasPrevious}"  />         
                <apex:commandButton value="<<" action="{!previous}" disabled="{!!hasPrevious}" />   
                <apex:commandButton value=">>" action="{!next}" disabled="{!!hasNext}"/>            
                <apex:commandButton value=">|" action="{!last}" disabled="{!!hasNext}" />     
            </td>

            <td align="right">
                <apex:outputText value="Records per page :" rendered="{!CEILING(ResultSize/PageSize)!=0}" />
                <apex:selectList value="{! PageSize }" size="1" rendered="{!CEILING(ResultSize/PageSize)!=0}">
                    <apex:selectOption itemValue="5" itemLabel="5"/>
                    <apex:selectOption itemValue="20" itemLabel="20"/>
                    <apex:actionSupport event="onchange" reRender="contacts_list"/>
                </apex:selectList>
            </td>
            <td align="right">
                <apex:outputText value="No Records" rendered="{!CEILING(ResultSize/PageSize)==0}" /> 
            </td>           
        </tr></table>
        <apex:pageBlockButtons style="align:left;"> 
            <apex:commandButton value="save" action="{!save}" /> 
        </apex:pageBlockButtons>    
    </apex:pageBlock>
</apex:form>

As you can see I have used <apex:param name="q" value="7" assignTo="{!PageSize}"/> but this is not serving my purpose. Please Help.Thanks in advance 🙂

Best Answer

You might want to make a note of this from the docs.

The <apex:param> component can only be a child of the following components: <apex:actionFunction> <apex:actionSupport> <apex:commandLink> <apex:outputLink> <apex:outputText>

I guess you are trying to default the pageSize to 7 without any button click.

Here is one approach wherein the contacts list is not visible on the page (style.display=hidden), on page load we set the page size to 7 via actionFunction and when that is complete (onComplete attribute of actionFunction is executed) we display the contacts_list pageBlock.

Wrap the <apex:param> with an actionFunction tag

  <apex:actionFunction  name="setPageSizeAsSeven" rerender="contacts_list" onComplete="onCompleteHandler()">
        <apex:param name="q" value="7" assignTo="{! PageSize }"/>
    </apex:actionFunction>

Wrap the contacts_list pageBlock tag with the following div

<div id="contactsListDiv" style="display:none;">

Invoke the actionFunction on pageLoad using javascript:

 <script> var previousOnload = window.onload; 
      window.onload = function() { if (previousOnload) { previousOnload(); }
     setPageSizeAsSeven(); } 
 function onCompleteHandler() { var contactsListDivElem = document.getElementById('contactsListDiv'); contactsListDivElem.style.display ='block'; }

This works but not sure if this is the best approach.

Related Solutions

[SalesForce] Show Related list without using standard controller

Ok lets try to solve this :)

First of all: as I understand there should be 3 SObjects in 1 table? As so we need to know what fields you want to use(from each object)? In that case you have to create wrapper class to unified those objects. Also in that case you will have to use more queries.

Please provide me with info about my questions :)

Advice :

Change this :

<apex:selectList id="operator" value="{!operator}" size="1"><br/>
        <apex:selectOption itemValue="=" itemLabel="Equal"/>
        <apex:selectOption itemValue="!=" itemLabel="Not equal to"/>
        <apex:selectOption itemValue="<=" itemLabel="Less than"/>
    </apex:selectList>

It is better to use list of option in your controller.

Page:

<apex:selectList value="{!SomeObejet.somePicklist}" label="somePicklist" size="1">
    <apex:selectOptions value="{!someOptions}"/>
</apex:selectList>

Controller:

public SelectOption[] getSomeOptions() {
    SelectOption[] options = new SelectOption[] {};

    options.add(new SelectOption('', '--None--'));
    options.add(new SelectOption(String Value, String displied text);
    /** Other options **/
    return options;
}

http://wiki.developerforce.com/page/Wrapper_Class

Wrapper class is just way to convert one type object in other type that contains some orginal values. I think you should create something like that

class Wrapper{
    /** here declare some fields you want show in wrapper **/
    public Wrapper(/**  as input values get this object you wanted use**/){
        /** here assign input object fields to wrapper class values **/
    }      
}

You will need 3 constructors - one for each object.

[SalesForce] get object name from standard controller vf without using controller or extension

A Visualforce page using a standard controller (i.e. not having a custom controller or a controller extension defined) exposes an instance of the object type defined in the standardController attribute using a property of the same name. So to display the name:

<apex:page standardController="Contact">
{!Contact.Name}
</apex:page>

The standard controller works out which fields to query based on its parsing of the {! } expressions in the page.

Not too clear what you are aiming for. This compiles:

<apex:page standardController="Contact">
    <c:Generic sob="{!Contact}"/>
</apex:page>

<apex:component>
    <apex:attribute type="SObject" name="sob" description=""/>
    Hello {!sob['Name']}
</apex:component>

but fails at runtime because the standard controller can't detect that the name field should be queried.

Best Answer

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[SalesForce] Show Related list without using standard controller

[SalesForce] get object name from standard controller vf without using controller or extension

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