Change the state of a checkbox in the backend - xpages

Question

In ssjs I try to change the state of a checkbox.
I tried :
doc.replaceItemValue( 'picWeb', "true" );
which doesn't seem to change anything (checkbox doesn't change to checked)
I also tried :
doc.replaceItemValue( 'picWeb', true );
which throws an error
( [TypeError] Exception occurred calling method NotesDocument.replaceItemValue(string, boolean) null)
If I understand it well : you can't change a checkbox (boolean) with replaceItemValue, but how do I change it then ?
Is it possible with ssjs or java or ...

Answer 1

Define in checkbox which string relates to checked value and which to unchecked value with the properties checkedValue and uncheckedValue:
<xp:checkBox
...
uncheckedValue="false"
checkedValue="true">
</xp:checkBox>
You can set the value then with
document1.replaceItemValue("picWeb", "true")
This is a complete example to demonstrate how to set a checkbox value in SSJS:
<?xml version="1.0" encoding="UTF-8"?>
<xp:view xmlns:xp="http://www.ibm.com/xsp/core">
<xp:this.data>
<xp:dominoDocument var="document1" formName="Test" />
</xp:this.data>
<xp:checkBox text="picWeb" id="checkBox1"
value="#{document1.picWeb}"
uncheckedValue="false"
checkedValue="true">
</xp:checkBox>
<xp:button value="True" id="button2">
<xp:eventHandler event="onclick" submit="false"
refreshMode="partial" refreshId="checkBox1">
<xp:this.action><![CDATA[#{javascript:
document1.replaceItemValue("picWeb", "true")
}]]></xp:this.action>
</xp:eventHandler>
</xp:button>
<xp:button value="False" id="button3">
<xp:eventHandler event="onclick" submit="false"
refreshMode="partial" refreshId="checkBox1">
<xp:this.action><![CDATA[#{javascript:
document1.replaceItemValue("picWeb", "false")
}]]></xp:this.action>
</xp:eventHandler>
</xp:button>
<xp:button value="Submit" id="button1">
<xp:eventHandler event="onclick" submit="true"
refreshMode="complete" immediate="false" save="true">
</xp:eventHandler>
</xp:button>
</xp:view>
The value is set in document as string