Figures

PagingTable.html

  
    
  
  
    

      

        
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ServerPaging.aspx

<%@ Import Namespace="System.Data" %>
<%@ Import Namespace="System.Data.SqlClient" %>


  
    

      
        
          
          
          
        
        
        
      
    
  

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ClientPaging.aspx

<%@ Import Namespace="System.Data" %>
<%@ Import Namespace="System.Data.SqlClient" %>
<%@ Register TagPrefix="msdn" Namespace="MSDN"
  Assembly="ClientPageDataGrid" %>


  
    

      <msdn:ClientPageDataGrid RunAt="server" ID="MyDataGrid"
        AutoGenerateColumns="false" CellPadding="2" Width="100%"
        Font-Name="Verdana" Font-Size="8pt"
        ClientPageSize="16" AllowClientPaging="true">
        
          
          
          
        
        
        
      
    
  

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ClientPageDataGrid Public Properties

Property Name	Description	Type	Read	Write	Default
AllowClientPaging	启用或禁用客户端分页	bool			True
ClientPageSize	获取或设置每页显示的记录数	int			10
ClientPageCount	获取当前页数	int			N/A
ClientCurrentPageIndex	获取或设置当前页号	int			0

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ClientPageDataGrid's Render Method

protected override void Render (HtmlTextWriter writer)
{
    if (AllowClientPaging && Items.Count > 0) {
        for (int i=0; i tag
            writer.AddAttribute (HtmlTextWriterAttribute.Id,
                ClientID + "_page" + i.ToString ());
            writer.AddAttribute (HtmlTextWriterAttribute.Style,
                i == ClientCurrentPageIndex ?
                    "display: block" : "display: none");
            writer.RenderBeginTag (HtmlTextWriterTag.Div);

            // Render a page inside the 

            ShowItems (i * ClientPageSize,
                Math.Min ((i * ClientPageSize) +
                ClientPageSize - 1,
                Items.Count - 1));
            UpdatePager (i);
            base.Render (writer);

            // Output a 
 tag
            writer.RenderEndTag ();
        }

        // Restore all DataGrid items to the visible state
        ShowItems (0, Items.Count - 1);
    }
    else {
        base.Render (writer);
    }
}

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HTML Generated by ClientPageDataGrid

  
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UpdatePager Method

void UpdatePager (int page)
{
    // Get a reference to the pager
    TableCell pager = null;
    for (int i = Controls[0].Controls.Count - 1; i >=0; i—) {
        if (((DataGridItem) Controls[0].Controls[i]).ItemType ==
            ListItemType.Pager) {
            pager = (TableCell) Controls[0].Controls[i].Controls[0];
            break;
        }
    }

    if (PagerStyle.Mode == PagerMode.NextPrev) {
        // Implement a client-side Next-Prev pager
        pager.Controls.Clear ();
        pager.Controls.Add (CreatePrevPageControl (page));
        pager.Controls.Add (new LiteralControl (" "));
        pager.Controls.Add (CreateNextPageControl (page));
    }
    else if (PagerStyle.Mode == PagerMode.NumericPages) {
        pager.Controls.Clear ();

        if (ClientPageCount <= PagerStyle.PageButtonCount) {
            // Implement a "1 2 3"-style numeric pager
            for (int i=0; i 0) {
                pager.Controls.Add (CreatePrevSectionControl (page,
                    section));
                pager.Controls.Add (new LiteralControl (" "));
            }

            // Add page numbers
            int start = section * PagerStyle.PageButtonCount;
            int end = Math.Min (start + PagerStyle.PageButtonCount -1,
                ClientPageCount - 1);

            for (int i=start; i
 DataBind Method
public override void DataBind ()
{
    if (AllowClientPaging && DataSource != null) {
        object OriginalDataSource = null;
                
        // If the data source is a DataReader, convert
        // it into a DataSet
        if (DataSource is IDataReader) {
            OriginalDataSource = DataSource;
            DataSource = DataSetFromDataReader
                ((IDataReader) DataSource);
        }
                
        // Bind once with paging disabled (and ItemCreated
        // and ItemDataBound events suppressed) to get an
        // item count
       _SuppressEvents = true;
        AllowPaging = false;
        base.DataBind ();
       _SuppressEvents = false;
                
        // Bind again with paging enabled to create a DataGrid
        // containing all items with a pager at the bottom
        PageSize = Items.Count;
        AllowPaging = true;
        base.DataBind ();
                
        // Restore the original data source
        if (OriginalDataSource != null)
            DataSource = OriginalDataSource;
                
        // Restore the current page index from postback data
        // if it hasn't been restored already
        if (Page.IsPostBack && AllowClientPaging &&
            !_RestoreCurrentPageIndexCalled)
            RestoreCurrentPageIndex ();
    }
    else {
        base.DataBind ();
    }
}



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