Visualforce Developer’s Guide
jNewer Version Available
Getting and Setting Query String Parameters on a Single Page
Having seen examples of both getting and setting query string parameters, this example shows how the two actions can be combined on a single page to produce a more interesting result. Based on the example from Getting Query String Parameters, the following page makes the name of each contact in the list a hyperlink that controls the context of the detail component below it.
This is possible by:
- Wrapping the data table in an <apex:form> tag
- Turning each contact name into an <apex:commandLink> that sets the cid parameter appropriately with an <apex:param> tag
When used with a standard controller, command links always entirely refresh the current page with the new information added to the page—in this case, an updated cid that updates the contact detail component.
1swfobject.registerObject("clippy.codeblock-0", "9");
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17<apex:page standardController="Account">
18 <apex:pageBlock title="Hello {!$User.FirstName}!">
19 You are displaying contacts from the {!account.name} account.
20 Click a contact's name to view his or her details.
21 </apex:pageBlock>
22 <apex:pageBlock title="Contacts">
23 <apex:form>
24 <apex:dataTable value="{!account.Contacts}" var="contact" cellPadding="4"
25 border="1">
26 <apex:column>
27 <apex:facet name="header">Name</apex:facet>
28 <apex:commandLink>
29 {!contact.Name}
30 <apex:param name="cid" value="{!contact.id}"/>
31 </apex:commandLink>
32 </apex:column>
33 <apex:column>
34 <apex:facet name="header">Phone</apex:facet>
35 {!contact.Phone}
36 </apex:column>
37 </apex:dataTable>
38 </apex:form>
39 </apex:pageBlock>
40 <apex:detail subject="{!$CurrentPage.parameters.cid}" relatedList="false" title="false"/>
41</apex:page>After saving this markup, refresh your browser with the id query string parameter
but without the cid parameter
in the URL For example,
1https://Salesforce_instance/apex/MyFirstPage?id=001D000000IRt53