ListView.ItemDataBound Kejadian

Referensi

Definisi

Ruang nama:: System.Web.UI.WebControls

Rakitan:: System.Web.Extensions.dll

Penting

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Terjadi saat item data terikat ke data dalam ListView kontrol.

public:
 event EventHandler<System::Web::UI::WebControls::ListViewItemEventArgs ^> ^ ItemDataBound;

public event EventHandler<System.Web.UI.WebControls.ListViewItemEventArgs> ItemDataBound;

member this.ItemDataBound : EventHandler<System.Web.UI.WebControls.ListViewItemEventArgs>

Public Custom Event ItemDataBound As EventHandler(Of ListViewItemEventArgs)

Jenis Acara

EventHandler<ListViewItemEventArgs>

Contoh

Contoh berikut menunjukkan cara menggunakan ItemDataBound peristiwa.


<%@ Page Language="C#" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">

    // <Snippet2>
    protected void ContactsListView_ItemDataBound(object sender, ListViewItemEventArgs e)
    {
        Label EmailAddressLabel;
        if (e.Item.ItemType == ListViewItemType.DataItem)
        {
            // Display the email address in italics.
            EmailAddressLabel = (Label)e.Item.FindControl("EmailAddressLabel");
            EmailAddressLabel.Font.Italic = true;

            System.Data.DataRowView rowView = e.Item.DataItem as System.Data.DataRowView;
            string currentEmailAddress = rowView["EmailAddress"].ToString();
            if (currentEmailAddress == "orlando0@adventure-works.com")
            {
                EmailAddressLabel.Font.Bold = true;
            }
        }
    }
    // </Snippet2>
  
</script>
<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
    <title>ListView ItemDataBound Example</title>
</head>
<body style="font: 10pt Trebuchet MS">
    <form id="form1" runat="server">
    <h3>
        ListView ItemDataBound Example</h3>
    <asp:ListView ID="ContactsListView" DataSourceID="ContactsDataSource" ConvertEmptyStringToNull="true"
        OnItemDataBound="ContactsListView_ItemDataBound" runat="server">
        <LayoutTemplate>
            <table cellpadding="2" width="680px" border="0">
                <tr style="background-color: #ADD8E6" runat="server">
                    <th runat="server">
                        First Name
                    </th>
                    <th runat="server">
                        Last Name
                    </th>
                    <th runat="server">
                        Email Address
                    </th>
                </tr>
                <tr runat="server" id="itemPlaceholder" />
            </table>
            <asp:DataPager runat="server" ID="PeopleDataPager" PageSize="12">
                <Fields>
                    <asp:NumericPagerField ButtonCount="10" />
                </Fields>
            </asp:DataPager>
        </LayoutTemplate>
        <ItemTemplate>
            <tr style="background-color: #CAEEFF" runat="server">
                <td>
                    <asp:Label ID="FirstNameLabel" runat="server" Text='<%#Eval("FirstName") %>' />
                </td>
                <td>
                    <asp:Label ID="LastNameLabel" runat="server" Text='<%#Eval("LastName") %>' />
                </td>
                <td>
                    <asp:Label ID="EmailAddressLabel" runat="server" Text='<%#Eval("EmailAddress") %>' />
                </td>
            </tr>
        </ItemTemplate>
    </asp:ListView>
    <!-- This example uses Microsoft SQL Server and connects      -->
    <!-- to the AdventureWorks sample database. Use an ASP.NET    -->
    <!-- expression to retrieve the connection string value       -->
    <!-- from the Web.config file.                                -->
    <asp:SqlDataSource ID="ContactsDataSource" runat="server" ConnectionString="<%$ ConnectionStrings:AdventureWorksConnectionString %>"
        SelectCommand="SELECT FirstName, LastName, EmailAddress FROM SalesLT.Customer">
    </asp:SqlDataSource>
    </form>
</body>
</html>


<%@ Page Language="VB" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<script runat="server">

    ' <Snippet2>
    Protected Sub ContactsListView_ItemDataBound(ByVal sender As Object, _
                                                 ByVal e As ListViewItemEventArgs)
  
        If e.Item.ItemType = ListViewItemType.DataItem Then
            ' Display the email address in italics.
            Dim EmailAddressLabel As Label = _
              CType(e.Item.FindControl("EmailAddressLabel"), Label)
            EmailAddressLabel.Font.Italic = True

            Dim rowView As System.Data.DataRowView
            rowView = CType(e.Item.DataItem, System.Data.DataRowView)
            Dim currentEmailAddress As String = rowView("EmailAddress").ToString()
            If currentEmailAddress = "orlando0@adventure-works.com" Then
                EmailAddressLabel.Font.Bold = True
            End If
        End If
        
    End Sub
    ' </Snippet2>

</script>

<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
    <title>ListView ItemDataBound Example</title>
</head>
<body style="font: 10pt Trebuchet MS">
    <form id="form1" runat="server">
    <h3>
        ListView ItemDataBound Example</h3>
    <asp:ListView ID="ContactsListView" DataSourceID="ContactsDataSource" ConvertEmptyStringToNull="true"
        OnItemDataBound="ContactsListView_ItemDataBound" runat="server">
        <layouttemplate>
          <table cellpadding="2" width="680px" border="0">
            <tr style="background-color: #ADD8E6" runat="server">
                <th runat="server">First Name</th>
                <th runat="server">Last Name</th>
                <th runat="server">Email Address</th>
            </tr>
            <tr runat="server" id="itemPlaceholder" />
          </table>
          <asp:DataPager runat="server" ID="PeopleDataPager" PageSize="12">
            <Fields>
              <asp:NumericPagerField ButtonCount="10" /> 
            </Fields>
          </asp:DataPager>
        </layouttemplate>
        <itemtemplate>
          <tr style="background-color: #CAEEFF" runat="server">
            <td>
              <asp:Label ID="FirstNameLabel" runat="server" Text='<%#Eval("FirstName") %>' />
            </td>
            <td>
              <asp:Label ID="LastNameLabel" runat="server" Text='<%#Eval("LastName") %>' />
            </td>
            <td>
              <asp:Label ID="EmailAddressLabel" runat="server" Text='<%#Eval("EmailAddress") %>' />
            </td>
          </tr>
        </itemtemplate>
    </asp:ListView>
    <!-- This example uses Microsoft SQL Server and connects      -->
    <!-- to the AdventureWorks sample database. Use an ASP.NET    -->
    <!-- expression to retrieve the connection string value       -->
    <!-- from the Web.config file.                                -->
    <asp:SqlDataSource ID="ContactsDataSource" runat="server" ConnectionString="<%$ ConnectionStrings:AdventureWorksConnectionString %>"
        SelectCommand="SELECT FirstName, LastName, EmailAddress FROM SalesLT.Customer">
    </asp:SqlDataSource>
    </form>
</body>
</html>

Keterangan

ListView Sebelum kontrol dapat dirender, setiap item dalam kontrol harus terikat ke rekaman di sumber data. Peristiwa ItemDataBound dimunculkan saat item data terikat ke data dalam ListView kontrol. (Item data diwakili oleh ListViewDataItem objek.) Ini memungkinkan Anda untuk melakukan rutinitas kustom setiap kali peristiwa ini terjadi, seperti memodifikasi nilai data yang terikat ke item.

Objek ListViewItemEventArgs diteruskan ke penanganan aktivitas, yang memungkinkan Anda mengakses properti item yang terikat. Untuk mengakses kontrol tertentu dalam item, gunakan FindControl metode ListViewItem objek yang terkandung dalam Item properti ListViewItemEventArgs objek . Anda dapat menentukan tipe item mana (item data, item sisipkan, item kosong) yang terikat dengan menggunakan ItemType properti .

Untuk informasi selengkapnya tentang cara menangani peristiwa, lihat Menangani dan Menaikkan Peristiwa.

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