PanelCollection set width 100 percent

Select Panel collection in properties set Style Class property to "AFStretchWidth"

JNDI Connection in jdeveloper

In applicationmodule properties set the database connection to jdbc datasource and the value "jdbc/your_datasource_name"

Application Context

In viewcontroller project properties -> Java EE Application. give application name and context name here.

ADF 11g: Deleting all rows from Viewobject programmatically.

On button event write below code:

DCBindingContainer dc = (DCBindingContainer)BindingContext.getCurrent().getCurrentBindingsEntry();

ViewObject myVo= dc.findIteratorBinding("myVoIterator").getViewObject();
RowSetIterator rsI = myVo.createRowSetIterator(null);
while(rsI.hasNext()){
rsI.next().remove();
}
rsI.closeRowSetIterator();