flex分页代码

<?xml version="1.0" encoding="utf-8"?> 

<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" xmlns="*" layout="absolute" creationComplete="initApp()"> 

<mx:Script> 

<![CDATA[ 

   public var pageRecordes:uint = 8; 

   public var totalPages:uint = 0; 

   public var totalRows:uint = 0; 

   public var currentPage:uint = 1; 

   public var pageStartRow:uint = 1; 

   public var pageEndRow:uint = 0; 

   

   public function initApp():void{ 

     txt.text = "Page " + currentPage; 

     totalRows = initDG.length; 

     if(initDG.length > pageRecordes){ 

      dg.dataProvider = initDG.slice(0,pageRecordes); 

      pPage.enabled = false; 

     } 

     

     if((totalRows % pageRecordes) == 0){ 

       totalPages = Math.floor(totalRows / pageRecordes); 

     }else{ 

      totalPages = Math.floor(totalRows / pageRecordes + 1); 

     } 

     

     if(totalRows <= pageRecordes){ 

      this.pageStartRow = 1; 

      this.pageEndRow = totalRows; 

      } else { 

      this.pageStartRow = 1; 

      this.pageEndRow = pageRecordes; 

     } 

     

     if(totalPages == 1){ 

      pPage.enabled = false; 

      nPage.enabled = false; 

     }    

   } 

   

   public function showPreviousPage():void{ 

     currentPage = currentPage - 1; 

     txt.text = "Page " + currentPage; 

     if(currentPage == 1){ 

      pPage.enabled = false; 

      nPage.enabled = true; 

     }else{ 

      pPage.enabled = true; 

      nPage.enabled = true; 

     } 

     if (currentPage == totalPages) { 

      pageStartRow = (currentPage - 1) * pageRecordes + 1; 

      pageEndRow = totalRows; 

     } else { 

      pageStartRow = (currentPage - 1) * pageRecordes + 1; 

      pageEndRow = currentPage * pageRecordes; 

     } 

     dg.dataProvider = initDG.slice(pageStartRow - 1,pageEndRow); 

   } 

   

   public function showNextPage():void{ 

     currentPage = currentPage + 1; 

     txt.text = "Page " + currentPage; 

     if(currentPage == totalPages){ 

      nPage.enabled = false; 

      pPage.enabled = true; 

     }else{ 

      nPage.enabled = true; 

      pPage.enabled = true; 

     } 

     if (currentPage == totalPages) { 

      pageStartRow = (currentPage - 1) * pageRecordes + 1; 

      pageEndRow = totalRows; 

     } else { 

      pageStartRow = (currentPage - 1) * pageRecordes + 1; 

      pageEndRow = currentPage * pageRecordes; 

     } 

     dg.dataProvider = initDG.slice((currentPage - 1) * pageRecordes,pageEndRow); 

   } 

   

   public function showFirstPage():void{ 

     dg.dataProvider = initDG.slice(0,pageRecordes); 

     pPage.enabled = false; 

     nPage.enabled = true; 

     txt.text = "Page " + 1; 

     currentPage = 1; 

   } 

   

   public function showLastPage():void{ 

     dg.dataProvider = initDG.slice((totalPages - 1) * pageRecordes,totalRows); 

     pPage.enabled = true; 

     nPage.enabled = false; 

     txt.text = "Page " + totalPages; 

     currentPage = totalPages; 

   } 

]]> 

</mx:Script> 

<mx:Panel title="DataGrid Panel" height="287" width="500"> 

<mx:DataGrid id="dg" height="100%" width="100%"> 

    <mx:dataProvider> 

                    <mx:Array id="initDG"> 

                        <mx:Object PLAYER="Rafer Alston" POS="G" FROM="Fresno State"/> 

                        <mx:Object PLAYER="Luther Head" POS="G" FROM="lllinois"/> 

                        <mx:Object PLAYER="Tracy McGrady" POS="F-G" FROM="Mount Zion Christian Acad. HS (NC)"/> 

                        <mx:Object PLAYER="Dikembe Mutombo" POS="C" FROM="Georgetown"/> 

                        <mx:Object PLAYER="Stromile Swift" POS="F" FROM="Louisiana State"/> 

                        <mx:Object PLAYER="David Wesley" POS="G" FROM="Baylor"/> 

                        <mx:Object PLAYER="Yao Ming" POS="C" FROM="China"/> 

                        <mx:Object PLAYER="Kobe Bryant" POS="G" FROM="Lower Merion HS (PA)"/> 

                        <mx:Object PLAYER="Kwame Brown" POS="F-C" FROM="Glynn Academy HS (GA)"/> 

                        <mx:Object PLAYER="Lamar Odom" POS="F" FROM="Rhode Island"/> 

                        <mx:Object PLAYER="Andrew Bynum" POS="C" FROM="St. Joseph HS (NJ)"/> 

                        <mx:Object PLAYER="Brian Cook" POS="F" FROM="Illinois"/> 

                        <mx:Object PLAYER="Devean George" POS="F" FROM="Augsburg"/> 

                        <mx:Object PLAYER="Devin Green" POS="G" FROM="Hampton"/> 

                        <mx:Object PLAYER="Aaron McKie" POS="F" FROM="Temple"/> 

                        <mx:Object PLAYER="Chris Mihm" POS="C" FROM="Texas"/> 

                        <mx:Object PLAYER="Smush Parker" POS="G" FROM="Fordham"/> 

                        <mx:Object PLAYER="Ronny Turiaf" POS="F" FROM="Gonzaga"/> 

                        <mx:Object PLAYER="Sasha Vujacic" POS="F" FROM="Slovenia"/> 

                        <mx:Object PLAYER="Von Wafer" POS="F" FROM="Florida State"/> 

                        <mx:Object PLAYER="Luke Walton" POS="F" FROM="Arizona"/> 

                        <mx:Object PLAYER="Lamar Odom" POS="F" FROM="Rhode Island"/> 

                        <mx:Object PLAYER="Jim Jackson" POS="F-G" FROM="Ohio State"/> 

                    </mx:Array> 

             </mx:dataProvider> 

</mx:DataGrid> 

<mx:Spacer /> 

<mx:HBox width="391"> 

   <mx:Spacer /> 

   <mx:LinkBar borderStyle="solid" color="#000000" backgroundColor="#CCFFFF" id="fPage" label="firstPage" itemClick="showFirstPage()"> 

    <mx:dataProvider> 

              <mx:Array> 

                  <mx:String>firstPage</mx:String> 

              </mx:Array> 

          </mx:dataProvider> 

   </mx:LinkBar> 

   <mx:LinkBar borderStyle="solid" color="#000000" backgroundColor="#CCFFFF" id="pPage" label="prevPage" itemClick="showPreviousPage()"> 

    <mx:dataProvider> 

              <mx:Array> 

                  <mx:String>prePage</mx:String> 

              </mx:Array> 

          </mx:dataProvider> 

   </mx:LinkBar> 

   <mx:Text id="txt" width="52"/> 

   <mx:LinkBar borderStyle="solid" color="#000000" backgroundColor="#CCFFFF" id="nPage" label="nextPage" itemClick="showNextPage()"> 

    <mx:dataProvider> 

              <mx:Array> 

                  <mx:String>nextPage</mx:String> 

              </mx:Array> 

          </mx:dataProvider> 

   </mx:LinkBar> 

   <mx:LinkBar borderStyle="solid" color="#000000" backgroundColor="#CCFFFF" id="lPage" label="lastPage" itemClick="showLastPage()"> 

    <mx:dataProvider> 

              <mx:Array> 

                  <mx:String>lastPage</mx:String> 

              </mx:Array> 

          </mx:dataProvider> 

   </mx:LinkBar> 

</mx:HBox> 

<mx:Spacer /> 

</mx:Panel> 

</mx:Application>