IsPostBack) { $data=array('item 1','item 2','item 3','item 4'); $this->DBCheckBoxList1->DataSource=$data; $this->DBCheckBoxList1->dataBind(); $data=array('key 1'=>'item 1','key 2'=>'item 2', 'key 3'=>'item 3','key 4'=>'item 4'); $this->DBCheckBoxList2->DataSource=$data; $this->DBCheckBoxList2->dataBind(); $data=array( array('id'=>'001','name'=>'John','age'=>31), array('id'=>'002','name'=>'Mary','age'=>30), array('id'=>'003','name'=>'Cary','age'=>20)); $this->DBCheckBoxList3->DataSource=$data; $this->DBCheckBoxList3->dataBind(); } } protected function collectSelectionResult($input,$output) { $indices=$input->SelectedIndices; $result=''; foreach($indices as $index) { $item=$input->Items[$index]; $result.="(Index: $index, Value: $item->Value, Text: $item->Text)"; } if($result==='') $output->Text='Your selection is empty.'; else $output->Text='Your selection is: '.$result; } public function buttonClicked($sender,$param) { $this->collectSelectionResult($this->CheckBoxList,$this->SelectionResult); } public function selectionChanged($sender,$param) { $this->collectSelectionResult($sender,$this->SelectionResult2); } public function DBCheckBoxList1Changed($sender,$param) { $this->collectSelectionResult($sender,$this->DBCheckBoxList1Result); } public function DBCheckBoxList2Changed($sender,$param) { $this->collectSelectionResult($sender,$this->DBCheckBoxList2Result); } public function DBCheckBoxList3Changed($sender,$param) { $this->collectSelectionResult($sender,$this->DBCheckBoxList3Result); } } ?>