Control.DataBinding 事件
定義
重要
部分資訊涉及發行前產品，在發行之前可能會有大幅修改。 Microsoft 對此處提供的資訊，不做任何明確或隱含的瑕疵擔保。
發生於伺服器控制項繫結至資料來源時。
public:
event EventHandler ^ DataBinding;public event EventHandler DataBinding;member this.DataBinding : EventHandler Public Custom Event DataBinding As EventHandler 事件類型
範例
/* Create a class that implements the ITemplate interface.
This class overrides the InstantiateIn method to always
place templates in a Literal object. It also creates a
custom BindData method that is used as the event handler
associated with the Literal object's DataBinding event.
*/
using System;
using System.Web;
using System.Data;
using System.Web.UI;
using System.Web.UI.WebControls;
namespace UsingItemTemplates
{
public class GenericItem : ITemplate
{
private string column;
public GenericItem(string column)
{
this.column = column;
}
// Override the ITemplate.InstantiateIn method to ensure
// that the templates are created in a Literal control and
// that the Literal object's DataBinding event is associated
// with the BindData method.
public void InstantiateIn(Control container)
{
Literal l = new Literal();
l.DataBinding += new EventHandler(this.BindData);
container.Controls.Add(l);
}
// Create a public method that will handle the
// DataBinding event called in the InstantiateIn method.
public void BindData(object sender, EventArgs e)
{
Literal l = (Literal) sender;
DataGridItem container = (DataGridItem) l.NamingContainer;
l.Text = ((DataRowView) container.DataItem)[column].ToString();
}
}
}
' Create a class that implements the ITemplate interface.
' This class overrides the InstantiateIn method to always
' place templates in a Literal object. It also creates a
' custom BindData method that is used as the event handler
' associated with the Literal object's DataBinding event.
Imports System.Web
Imports System.Data
Imports System.Web.UI
Imports System.Web.UI.WebControls
Namespace UsingItemTemplatesVB
Public Class GenericItem
Implements ITemplate
Private column As String
Public Sub New(column As String)
Me.column = column
End Sub
' Override the ITemplate.InstantiateIn method to ensure
' that the templates are created in a Literal control and
' that the Literal object's DataBinding event is associated
' with the BindData method.
Public Sub InstantiateIn(container As Control) Implements ITemplate.InstantiateIn
Dim l As New Literal()
AddHandler l.DataBinding, AddressOf Me.BindData
container.Controls.Add(l)
End Sub
' Create a public method that will handle the
' DataBinding event called in the InstantiateIn method.
Public Sub BindData(sender As Object, e As EventArgs)
Dim l As Literal = CType(sender, Literal)
Dim container As DataGridItem = CType(l.NamingContainer, DataGridItem)
l.Text = CType(container.DataItem, DataRowView)(column).ToString()
End Sub
End Class
End Namespace 'UsingItemTemplatesVB
備註
此事件會通知伺服器控制項執行已為其寫入的任何數據系結邏輯。
