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DataGrid.ItemDataBound Event

Occurs after an item is data bound to the DataGrid control.

Namespace:  System.Web.UI.WebControls
Assembly:  System.Web (in System.Web.dll)

'Declaration
Public Event ItemDataBound As DataGridItemEventHandler
'Usage
Dim instance As DataGrid 
Dim handler As DataGridItemEventHandler 

AddHandler instance.ItemDataBound, handler
<asp:DataGrid OnItemDataBound="DataGridItemEventHandler" />

The ItemDataBound event is raised after an item is data bound to the DataGrid control. This event provides you with the last opportunity to access the data item before it is displayed on the client. After this event is raised, the data item is nulled out and no longer available.

For more information about handling events, see Consuming Events.

The following code example demonstrates how to specify and code a handler for the ItemDataBound event to display the order that items in the DataGrid are data bounded.

<%@ 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">

    Dim Cart As DataTable
    Dim CartView As DataView
    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("CurrencyValue", GetType(Double)))

        Dim i As Integer 
        For i = 0 To 9
            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 New DataView(dt)
        Return dv
    End Function 'CreateDataSource


    Sub Page_Load(sender As Object, e As EventArgs)

        If Not IsPostBack Then 
            ' Need to load this data only once.
            ItemsGrid.DataSource = CreateDataSource()
            ItemsGrid.DataBind()
        End If 
    End Sub 'Page_Load


    Sub Item_Bound(sender As Object, e As DataGridItemEventArgs)

        Label1.Text = Label1.Text & " " & e.Item.ItemIndex
    End Sub 'Item_Bound 

</script>

<head runat="server">
    <title>DataGrid ItemDataBound Example</title>
</head>
<body>

   <form id="form1" runat="server">

      <h3>DataGrid ItemDataBound Example</h3>

      <asp:DataGrid id="ItemsGrid" runat="server"
           BorderColor="black"
           BorderWidth="1"
           CellPadding="3"
           ShowFooter="true"
           OnItemDataBound="Item_Bound"
           AutoGenerateColumns="true">

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

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

      </asp:DataGrid>

      <br />

      <asp:Label id="Label1" 
           Text="Order of items data bound: " 
           runat="server"/>

      <br />

      <asp:Label id="Label2" 
           Text="Note: The -1's refer to the header and footer." 
           runat="server"/>

   </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 10 

            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 Item_Bound(sender As Object, e As DataGridItemEventArgs) 

         ' Use the ItemDataBound event to customize the DataGrid control.  
         ' The ItemDataBound event allows you to access the data before  
         ' the item is displayed in the control. In this example, the  
         ' ItemDataBound event is used to format the items in the  
         ' CurrencyColumn in currency format. 
         If e.Item.ItemType = ListItemType.Item Or _
             e.Item.ItemType = ListItemType.AlternatingItem Then 

            ' Retrieve the text of the CurrencyColumn from the DataGridItem 
            ' and convert the value to a Double. 
            Dim Price As Double = Convert.ToDouble(e.Item.Cells(2).Text)

            ' Format the value as currency and redisplay it in the DataGrid.
            e.Item.Cells(2).Text = Price.ToString("c")

         End If          

      End Sub

</script>

<head runat="server">
    <title>DataGrid ItemDataBound Example</title>
</head>
<body>

   <form id="form1" runat="server">

      <h3>DataGrid ItemDataBound Example</h3>

      <asp:DataGrid id="ItemsGrid" runat="server"
           BorderColor="black"
           BorderWidth="1"
           CellPadding="3"
           ShowFooter="true"
           OnItemDataBound="Item_Bound">

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

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

      </asp:DataGrid>

   </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 10 

            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)

         ' Manually register the event-handling method for the   
         ' ItemDataBound event of the DataGrid control. 
         AddHandler ItemsGrid.ItemDataBound, AddressOf Item_Bound

         ' 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 Item_Bound(sender As Object, e As DataGridItemEventArgs) 

         ' Use the ItemDataBound event to customize the DataGrid control.  
         ' The ItemDataBound event allows you to access the data before  
         ' the item is displayed in the control. In this example, the  
         ' ItemDataBound event is used to format the items in the  
         ' CurrencyColumn in currency format. 
         If e.Item.ItemType = ListItemType.Item Or _
             e.Item.ItemType = ListItemType.AlternatingItem Then 

            ' Retrieve the text of the CurrencyColumn from the DataGridItem 
            ' and convert the value to a Double. 
            Dim Price As Double = Convert.ToDouble(e.Item.Cells(2).Text)

            ' Format the value as currency and redisplay it in the DataGrid.
            e.Item.Cells(2).Text = Price.ToString("c")

         End If          

      End Sub

</script>

<head runat="server">
    <title>DataGrid ItemDataBound Example</title>
</head>
<body>

   <form id="form1" runat="server">

      <h3>DataGrid ItemDataBound Example</h3>

      <asp:DataGrid id="ItemsGrid" runat="server"
           BorderColor="black"
           BorderWidth="1"
           CellPadding="3"
           ShowFooter="true">

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

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

      </asp:DataGrid>

   </form>

</body>
</html>

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Supported in: 3.5, 3.0, 2.0, 1.1, 1.0

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