silverlight 3 数据绑定及分页

前台页面

代码

< StackPanel  Orientation ="Vertical" >         
             < data:DataGrid  x:Name ="dataGrid"   HorizontalAlignment ="Stretch"  VerticalAlignment ="Top"  Margin ="4"    AutoGenerateColumns ="False"  HeadersVisibility ="Column"  GridLinesVisibility ="Horizontal"  RowBackground ="Cornsilk"  AlternatingRowBackground ="LemonChiffon"  RowHeight ="30"  IsReadOnly ="True"  CanUserResizeColumns ="False" >
                 < data:DataGrid .Columns >
                     < data:DataGridTextColumn  Header ="标题"   Binding ="{Binding Title}"   Width ="350"   ></ data:DataGridTextColumn >
                     < data:DataGridTextColumn  Header ="作者"  Binding ="{Binding Author}"  Width ="150"   ></ data:DataGridTextColumn >    
                 </ data:DataGrid.Columns >
             </ data:DataGrid >
         < data:DataPager  x:Name ="datapager1"  Height ="24"  Margin ="8,0,8,40"  VerticalAlignment ="Bottom"  Background ="#FFD7E2EE"  FontSize ="13.333"  Width ="304"  PageIndexChanged ="datapager1_PageIndexChanged" />

     </ StackPanel >

后台页面代码:

 

代码

  int  PageSize  =   10 ; // 设定分页大小
        List < int >  itemCount  =   new  List < int > (); // 用于DataPager的数据提供
         public  DataBaseOperate()
        {
            InitializeComponent();
        }

         private   void  UserControl_Loaded( object  sender, RoutedEventArgs e)
        {
            BlogServiceSoapClient webClient  =   new  BlogServiceSoapClient();            
            webClient.GetsimpleListAsync( "" ,PageSize,  1 );
            webClient.GetsimpleListCompleted += new  EventHandler < GetsimpleListCompletedEventArgs > (webClient_GetsimpleListCompleted);
            GeneralDataPagerContent(); // 生成DataPager的数据提供
        }
         void  webClient_GetsimpleListCompleted( object  sender, GetsimpleListCompletedEventArgs e)
        {
             if  (e.Error  ==   null )
            {
                dataGrid.ItemsSource  =  e.Result;
            }
        }
         void  GeneralDataPagerContent()
        {
            BlogServiceSoapClient webClient  =   new  BlogServiceSoapClient();
            webClient.GetTotalPagersAsync( "" ,PageSize);
            webClient.GetTotalPagersCompleted  +=
             new  EventHandler < GetTotalPagersCompletedEventArgs > (webClient_GetTotalPagersCompleted);
        }
         void  webClient_GetTotalPagersCompleted( object  sender, GetTotalPagersCompletedEventArgs e)
        {
             int  totalpagers  =  e.Result;
             for  ( int  i  =   1 ; i  <=  totalpagers; i ++ ) itemCount.Add(i);
            PagedCollectionView pcv  =   new  PagedCollectionView(itemCount);
            pcv.PageSize  =   1 ;
            datapager1.Source  =  pcv;

        }

        


         void  client_GetsimpleListCompleted( object  sender, TerryLee.SilverlightDemo2.DataBaseOperateServiceReference.GetsimpleListCompletedEventArgs e)
        {
             if  (e.Error  ==   null )
            {
                dataGrid.ItemsSource  =  e.Result;
            }
        }

         private   void  datapager1_PageIndexChanged( object  sender, EventArgs e)
        {
            BlogServiceSoapClient webClient  =   new  BlogServiceSoapClient();
            webClient.GetsimpleListAsync( "" ,PageSize, datapager1.PageIndex  +   1 ); // 索引值从0开始，所以要加1
            webClient.GetsimpleListCompleted  +=   new  EventHandler < GetsimpleListCompletedEventArgs > (webClient_GetsimpleListCompleted);

             // Binding(datapager1.PageIndex+2);
        }

         private   void  datapager1_PageIndexChanging( object  sender, System.ComponentModel.CancelEventArgs e)
        {
            BlogServiceSoapClient webClient  =   new  BlogServiceSoapClient();
            webClient.GetsimpleListAsync( "" , PageSize, datapager1.PageIndex  +   1 ); // 索引值从0开始，所以要加1
            webClient.GetsimpleListCompleted  +=   new  EventHandler < GetsimpleListCompletedEventArgs > (webClient_GetsimpleListCompleted);

        }

 

 

WebService里面有两个方法

代码

 [WebMethod]
         public  List < m_article >  GetsimpleList( string  strWhere,  int  PageSize,  int  CurrentPage)
        {
            StringBuilder strSql  =   new  StringBuilder();
            strSql.Append( " select   " );
             if  (PageSize  !=   0 )
                strSql.Append( "  top  "   +  PageSize);
            strSql.Append( "   *  " );
            strSql.Append( "  from  ( " );
            strSql.Append( "  SELECT ROW_NUMBER() OVER (ORDER BY publishdate desc) AS RowNo,  " );

            strSql.Append( "  [BH],[topicbh],[Title],[Author],[PublishDate] " );
            strSql.Append( "   FROM J_Articles    " );
             if  (strWhere.Trim()  !=   "" )
            {
                strSql.Append( "  where  "   +  strWhere);
            }

            strSql.Append( "  ) as T  " );
             if  (PageSize  !=   0 )
            {
                strSql.Append( "  where RowNo> " );
                strSql.Append((CurrentPage  -   1 )  *  PageSize);
            }

            DataTable dt  =  DbHelperSQL.Query(strSql.ToString()).Tables[ 0 ];

            m_article article;
            List < m_article >  articles  =   new  List < m_article > ();
             foreach  (DataRow row  in  dt.Rows)
            {
                article  =   new  m_article();
                article.Title  =  row[ " title " ].ToString();
                article.Author  =  row[ " author " ].ToString();
                articles.Add(article);
            }
             return  articles;
        }
        [WebMethod] // 得到总分页数
         public   int  GetTotalPagers( string   where , int  PageSize)
        {
             decimal  count  =   0 ;
            StringBuilder sql  =   new  StringBuilder();
            sql.Append( " select count(1)   from J_Articles    " );
             if  ( where .Trim()  !=   "" )
            {
                sql.Append( "  where  "   +   where );
            }
             object  obj  =  DbHelperSQL.GetSingle(sql.ToString());
             if  (obj  !=   null )
                count  =   decimal .Parse(obj.ToString());
             decimal  a  =  count  /  PageSize;            
             return    int .Parse( Math.Ceiling(a).ToString());     

        }