DataGrid.PageSize Property

Reference

Definition

Namespace:: System.Web.UI.WebControls

Assembly:: System.Web.dll

Important

Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.

Gets or sets the number of items to display on a single page of the DataGrid control.

public:
 virtual property int PageSize { int get(); void set(int value); };

public virtual int PageSize { get; set; }

member this.PageSize : int with get, set

Public Overridable Property PageSize As Integer

Property Value

Int32

The number of items to display on a single page of the DataGrid control. The default value is 10.

Exceptions

ArgumentOutOfRangeException

The specified page size less than 1.

Examples

The following code example demonstrates how to use the PageSize property to specify that five items are displayed on a single page of the DataGrid control.

<%@ Page Language="C#" AutoEventWireup="True" %>
<%@ Import Namespace="System.Data" %>
 
 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
 <script language="C#" runat="server">
 
    ICollection CreateDataSource() 
    {
       DataTable dt = new DataTable();
       DataRow dr;
 
       dt.Columns.Add(new DataColumn("IntegerValue", typeof(Int32)));
       dt.Columns.Add(new DataColumn("StringValue", typeof(string)));
       dt.Columns.Add(new DataColumn("DateTimeValue", typeof(string)));
       dt.Columns.Add(new DataColumn("BoolValue", typeof(bool)));
 
       for (int i = 0; i < 100; i++) 
       {
          dr = dt.NewRow();
 
          dr[0] = i;
          dr[1] = "Item " + i.ToString();
          dr[2] = DateTime.Now.ToShortDateString();
          dr[3] = (i % 2 != 0) ? true : false;
 
          dt.Rows.Add(dr);
       }
 
       DataView dv = new DataView(dt);
       return dv;
    }
 
    void Page_Load(Object sender, EventArgs e) 
    {
       if (chk1.Checked)
          MyDataGrid.PagerStyle.Mode = PagerMode.NumericPages;
       else 
          MyDataGrid.PagerStyle.Mode = PagerMode.NextPrev;
 
       BindGrid();
    }
 
    void MyDataGrid_Page(Object sender, DataGridPageChangedEventArgs e) 
    {
       MyDataGrid.CurrentPageIndex = e.NewPageIndex;
       BindGrid();
    }
 
    void BindGrid() 
    {
       MyDataGrid.DataSource = CreateDataSource();
       MyDataGrid.DataBind();
       ShowStats();
    }
 
    void ShowStats() 
    {
       lblEnabled.Text = "AllowPaging is " + MyDataGrid.AllowPaging;
       lblCurrentIndex.Text = "CurrentPageIndex is " + MyDataGrid.CurrentPageIndex;
       lblPageCount.Text = "PageCount is " + MyDataGrid.PageCount;
       lblPageSize.Text = "PageSize is " + MyDataGrid.PageSize;
    }
 
 
 </script>
 
 <head runat="server">
    <title>DataGrid Paging Example</title>
</head>
<body>
 
    <h3>DataGrid Paging Example</h3>
 
    <form id="form1" runat="server">
 
       <asp:DataGrid id="MyDataGrid" runat="server"
            AllowPaging="True"
            PageSize="10"
            OnPageIndexChanged="MyDataGrid_Page"
            BorderColor="black"
            BorderWidth="1"
            GridLines="Both"
            CellPadding="3"
            CellSpacing="0"
            Font-Names="Verdana"
            Font-Size="8pt">

            <PagerStyle Mode="NumericPages"
                        HorizontalAlign="Right">
            </PagerStyle>


            <HeaderStyle BackColor="#aaaadd">
            </HeaderStyle>

            <AlternatingItemStyle BackColor="#eeeeee">
            </AlternatingItemStyle>

       </asp:DataGrid>
 
       <br />
 
       <asp:Checkbox id="chk1" runat="server"
            Text="Show numeric page navigation buttons"
            Font-Names="Verdana"
            Font-Size="8pt"
            AutoPostBack="true"/>
 
       <br />
 
       <table style="background-color:#eeeeee; padding:6">
          <tr>
             <td style="display:inline">
                
 
                   <asp:Label id="lblEnabled" 
                        runat="server"/><br />
                   <asp:Label id="lblCurrentIndex" 
                        runat="server"/><br />
                   <asp:Label id="lblPageCount" 
                        runat="server"/><br />
                   <asp:Label id="lblPageSize" 
                        runat="server"/><br />
 
                
             </td>
          </tr>
       </table>
 
    </form>
 
 </body>
 </html>

<%@ Page Language="VB" AutoEventWireup="True" %>
<%@ Import Namespace="System.Data" %>
 
 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
 <script language="VB" runat="server">
 Function CreateDataSource() As ICollection
    Dim dt As New DataTable()
    Dim dr As DataRow
    
    dt.Columns.Add(New DataColumn("IntegerValue", GetType(Int32)))
    dt.Columns.Add(New DataColumn("StringValue", GetType(String)))
    dt.Columns.Add(New DataColumn("DateTimeValue", GetType(String)))
    dt.Columns.Add(New DataColumn("BoolValue", GetType(Boolean)))
    
    Dim i As Integer
    For i = 0 To 99
        dr = dt.NewRow()
        
        dr(0) = i
        dr(1) = "Item " & i.ToString()
        dr(2) = DateTime.Now.ToShortDateString()
        If i Mod 2 <> 0 Then
            dr(3) = True
        Else
            dr(3) = False
        End If
        
        dt.Rows.Add(dr)
    Next i
    
    Dim dv As New DataView(dt)
    Return dv
End Function 'CreateDataSource


Sub Page_Load(sender As Object, e As EventArgs)
    If chk1.Checked Then
        MyDataGrid.PagerStyle.Mode = PagerMode.NumericPages
    Else
        MyDataGrid.PagerStyle.Mode = PagerMode.NextPrev
    End If 
    BindGrid()
End Sub 'Page_Load


Sub MyDataGrid_Page(sender As Object, e As DataGridPageChangedEventArgs)
    MyDataGrid.CurrentPageIndex = e.NewPageIndex
    BindGrid()
End Sub 'MyDataGrid_Page


Sub BindGrid()
    MyDataGrid.DataSource = CreateDataSource()
    MyDataGrid.DataBind()
    ShowStats()
End Sub 'BindGrid


Sub ShowStats()
    lblEnabled.Text = "AllowPaging is " & MyDataGrid.AllowPaging
    lblCurrentIndex.Text = "CurrentPageIndex is " & MyDataGrid.CurrentPageIndex
    lblPageCount.Text = "PageCount is " & MyDataGrid.PageCount
    lblPageSize.Text = "PageSize is " & MyDataGrid.PageSize
End Sub 'ShowStats

 
 
 </script>
 
 <head runat="server">
    <title>DataGrid Paging Example</title>
</head>
<body>
 
    <h3>DataGrid Paging Example</h3>
 
    <form id="form1" runat="server">
 
       <asp:DataGrid id="MyDataGrid" runat="server"
            AllowPaging="True"
            PageSize="10"
            OnPageIndexChanged="MyDataGrid_Page"
            BorderColor="black"
            BorderWidth="1"
            GridLines="Both"
            CellPadding="3"
            CellSpacing="0"
            Font-Names="Verdana"
            Font-Size="8pt">

            <PagerStyle Mode="NumericPages"
                        HorizontalAlign="Right">
            </PagerStyle>


            <HeaderStyle BackColor="#aaaadd">
            </HeaderStyle>

            <AlternatingItemStyle BackColor="#eeeeee">
            </AlternatingItemStyle>

       </asp:DataGrid>
 
       <br />
 
       <asp:Checkbox id="chk1" runat="server"
            Text="Show numeric page navigation buttons"
            Font-Names="Verdana"
            Font-Size="8pt"
            AutoPostBack="true"/>
 
       <br />
 
       <table style="background-color:#eeeeee; padding:6">
          <tr>
             <td style="display:inline">
                
 
                   <asp:Label id="lblEnabled" 
                        runat="server"/><br />
                   <asp:Label id="lblCurrentIndex" 
                        runat="server"/><br />
                   <asp:Label id="lblPageCount" 
                        runat="server"/><br />
                   <asp:Label id="lblPageSize" 
                        runat="server"/><br />
 
                
             </td>
          </tr>
       </table>
 
    </form>
 
 </body>
 </html>


<%@ Page Language="C#" AutoEventWireup="True" %>
<%@ Import Namespace="System.Data" %>
 
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
   <script runat="server">
 
      ICollection CreateDataSource()
      {

         // Create sample data for the DataGrid control.
         DataTable dt = new DataTable();
         DataRow dr;
 
         // Define the columns of the table.
         dt.Columns.Add(new DataColumn("IntegerValue", typeof(Int32)));
         dt.Columns.Add(new DataColumn("StringValue", typeof(String)));
         dt.Columns.Add(new DataColumn("CurrencyValue", typeof(Double)));
 
         // Populate the table with sample values.
         for (int i=0; i<=100; i++) 
         {

            dr = dt.NewRow();
 
            dr[0] = i;
            dr[1] = "Item " + i.ToString();
            dr[2] = 1.23 * (i + 1);
 
            dt.Rows.Add(dr);
         
         }
 
         DataView dv = new DataView(dt);

         return dv;
      
      }
 
      void Page_Load(Object sender, EventArgs e)
      { 
 
         // Load sample data only once, when the page is first loaded.
         if (!IsPostBack)
         { 
         
            ItemsGrid.DataSource = CreateDataSource();
            ItemsGrid.DataBind();
         
         }

      }

      void Selection_Change(Object sender, EventArgs e)
      {

         // Set the page size for the DataGrid control based on the
         // user's selection.
         ItemsGrid.PageSize = 
             Convert.ToInt32(PageSizeList.SelectedItem.Text);

         // Rebind the data to refresh the DataGrid control. 
         ItemsGrid.DataSource = CreateDataSource();
         ItemsGrid.DataBind();

      }

      void Grid_Change(Object sender, DataGridPageChangedEventArgs e) 
      {
 
         // For the DataGrid control to navigate to the correct page when
         // paging is allowed, the CurrentPageIndex property must be
         // updated programmatically. This process is usually accomplished
         // in the event-handling method for the PageIndexChanged event.

         // Set CurrentPageIndex to the page the user clicked.
         ItemsGrid.CurrentPageIndex = e.NewPageIndex;

         // Rebind the data to refresh the DataGrid control. 
         ItemsGrid.DataSource = CreateDataSource();
         ItemsGrid.DataBind();
      
      }

   </script>
 
<head runat="server">
    <title>DataGrid PageSize Example</title>
</head>
<body>
 
   <form id="form1" runat="server">
 
      <h3>DataGrid PageSize Example</h3>

      Select the number of items to display on a page.

      <br /><br />
 
      <b>Product List</b>
 
      <asp:DataGrid id="ItemsGrid"
           BorderColor="black"
           BorderWidth="1"
           CellPadding="3"
           AutoGenerateColumns="False"
           PageSize="10"
           AllowPaging="True"
           OnPageIndexChanged="Grid_Change"
           runat="server">

         <HeaderStyle BackColor="#00aaaa">
         </HeaderStyle>

         <Columns>

            <asp:BoundColumn DataField="IntegerValue" 
                 SortExpression="IntegerValue"
                 HeaderText="Item"/>

            <asp:BoundColumn DataField="StringValue"
                 SortExpression="StringValue" 
                 HeaderText="Description"/>

            <asp:BoundColumn DataField="CurrencyValue" 
                 HeaderText="Price"
                 SortExpression="CurrencyValue"
                 DataFormatString="{0:c}">

               <ItemStyle HorizontalAlign="Right">
               </ItemStyle>

            </asp:BoundColumn>

         </Columns> 
 
      </asp:DataGrid>

      <hr />

      <table cellpadding="5">

         <tr>

            <td>

               <asp:Label id="Message" 
                    Text="Page size:"
                    runat="server"
                    AssociatedControlID="PageSizeList"/>

            </td>

         </tr>

         <tr>

            <td>

               <asp:DropDownList id="PageSizeList"
                    AutoPostBack="True"
                    OnSelectedIndexChanged="Selection_Change"
                    runat="server">

                  <asp:ListItem> 5 </asp:ListItem>
                  <asp:ListItem Selected="True"> 10 </asp:ListItem>
                  <asp:ListItem> 15 </asp:ListItem>
                  <asp:ListItem> 20 </asp:ListItem>

               </asp:DropDownList>

            </td>

         </tr>

      </table>
 
   </form>
 
</body>
</html>


<%@ Page Language="VB" AutoEventWireup="True" %>
<%@ Import Namespace="System.Data" %>
 
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
   <script runat="server">
 
      Function CreateDataSource() As ICollection 

         ' Create sample data for the DataGrid control.
         Dim dt As DataTable = New DataTable()
         Dim dr As DataRow
 
         ' Define the columns of the table.
         dt.Columns.Add(new DataColumn("IntegerValue", GetType(Int32)))
         dt.Columns.Add(new DataColumn("StringValue", GetType(String)))
         dt.Columns.Add(new DataColumn("CurrencyValue", GetType(Double)))
 
         ' Populate the table with sample values.
         Dim i As Integer

         For i=0 To 100

            dr = dt.NewRow()
 
            dr(0) = i
            dr(1) = "Item " & i.ToString()
            dr(2) = 1.23 * (i + 1)
 
            dt.Rows.Add(dr)
         
         Next i
 
         Dim dv As DataView = New DataView(dt)

         Return dv
      
      End Function
 
      Sub Page_Load(sender As Object, e As EventArgs)
 
         ' Load sample data only once, when the page is first loaded.
         If Not IsPostBack Then 
         
            ItemsGrid.DataSource = CreateDataSource()
            ItemsGrid.DataBind()
         
         End If

      End Sub

      Sub Selection_Change(sender As Object, e As EventArgs)

         ' Set the page size for the DataGrid control based on the
         ' user's selection.
         ItemsGrid.PageSize = Convert.ToInt32(PageSizeList.SelectedItem.Text)

         ' Rebind the data to refresh the DataGrid control. 
         ItemsGrid.DataSource = CreateDataSource()
         ItemsGrid.DataBind()

      End Sub

      Sub Grid_Change(sender As Object, e As DataGridPageChangedEventArgs) 
 
         ' For the DataGrid control to navigate to the correct page when
         ' paging is allowed, the CurrentPageIndex property must be
         ' updated programmatically. This process is usually accomplished
         ' in the event-handling method for the PageIndexChanged event.

         ' Set CurrentPageIndex to the page the user clicked.
         ItemsGrid.CurrentPageIndex = e.NewPageIndex

         ' Rebind the data to refresh the DataGrid control. 
         ItemsGrid.DataSource = CreateDataSource()
         ItemsGrid.DataBind()
      
      End Sub

   </script>
 
<head runat="server">
    <title>DataGrid PageSize Example</title>
</head>
<body>
 
   <form id="form1" runat="server">
 
      <h3>DataGrid PageSize Example</h3>

      Select the number of items to display on a page.

      <br /><br />
 
      <b>Product List</b>
 
      <asp:DataGrid id="ItemsGrid"
           BorderColor="black"
           BorderWidth="1"
           CellPadding="3"
           AutoGenerateColumns="False"
           PageSize="10"
           AllowPaging="True"
           OnPageIndexChanged="Grid_Change"
           runat="server">

         <HeaderStyle BackColor="#00aaaa">
         </HeaderStyle>

         <Columns>

            <asp:BoundColumn DataField="IntegerValue" 
                 SortExpression="IntegerValue"
                 HeaderText="Item"/>

            <asp:BoundColumn DataField="StringValue"
                 SortExpression="StringValue" 
                 HeaderText="Description"/>

            <asp:BoundColumn DataField="CurrencyValue" 
                 HeaderText="Price"
                 SortExpression="CurrencyValue"
                 DataFormatString="{0:c}">

               <ItemStyle HorizontalAlign="Right">
               </ItemStyle>

            </asp:BoundColumn>

         </Columns> 
 
      </asp:DataGrid>

      <hr />

      <table cellpadding="5">

         <tr>

            <td>

               <asp:Label id="Message" 
                    Text="Page size:"
                    runat="server"
                    AssociatedControlID="PageSizeList"/>

            </td>

         </tr>

         <tr>

            <td>

               <asp:DropDownList id="PageSizeList"
                    AutoPostBack="True"
                    OnSelectedIndexChanged="Selection_Change"
                    runat="server">

                  <asp:ListItem> 5 </asp:ListItem>
                  <asp:ListItem Selected="True"> 10 </asp:ListItem>
                  <asp:ListItem> 15 </asp:ListItem>
                  <asp:ListItem> 20 </asp:ListItem>

               </asp:DropDownList>

            </td>

         </tr>

      </table>
 
   </form>
 
</body>
</html>

Remarks

Use this property to specify the number of items to display on a single page of the DataGrid control. The AllowPaging property must be set to true for this property have any effect.

Applies to

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