BaseDataList.SelectedIndexChanged イベント
サーバーへのポスト間でデータ リスト コントロールの別の項目が選択されると発生します。
名前空間: System.Web.UI.WebControls
アセンブリ: System.Web (system.web.dll 内)
構文
'宣言
Public Event SelectedIndexChanged As EventHandler
'使用
Dim instance As BaseDataList
Dim handler As EventHandler
AddHandler instance.SelectedIndexChanged, handler
public event EventHandler SelectedIndexChanged
public:
event EventHandler^ SelectedIndexChanged {
void add (EventHandler^ value);
void remove (EventHandler^ value);
}
/** @event */
public void add_SelectedIndexChanged (EventHandler value)
/** @event */
public void remove_SelectedIndexChanged (EventHandler value)
JScript では、このクラスで定義されているイベントを処理できます。ただし、独自のイベントは定義できません。
適用できません。
解説
サーバーへのポスト間でデータ リスト コントロールの別の項目が選択されると、SelectedIndexChanged イベントが発生します。
イベント処理の詳細については、「イベントの利用」を参照してください。
使用例
SelectedIndexChanged イベントのイベント ハンドラを宣言により提供する方法を次のコード例に示します。
<%@ Page Language="VB" AutoEventWireup="True"%>
<%@ Import Namespace="System.Data" %>
<%@ Import Namespace="System.Data.SqlClient" %>
<!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" >
<head runat="server">
<title>Declarative BaseDataList SelectedIndexChanged Example</title>
<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(Integer)))
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 8
dr = dt.NewRow()
dr(0) = i
dr(1) = "Item " & i.ToString()
dr(2) = 1.23 * (i + 1)
dt.Rows.Add(dr)
Next i
' Create a DataView from the DataTable.
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 IndexChange_Command(sender As Object, e As EventArgs)
' Display the details of the selected item.
DetailsLabel.Text = _
"Item Number: " & ItemsGrid.SelectedItem.Cells(1).Text & "<br />" & _
"Description: " & ItemsGrid.SelectedItem.Cells(2).Text & "<br />" & _
"Price: $" & ItemsGrid.SelectedItem.Cells(3).Text & "<br />"
End Sub
</script>
</head>
<body>
<form id="form1" runat="server">
<h3>Declarative BaseDataList SelectedIndexChanged Example</h3>
Select an item:
<br /><br />
<asp:DataGrid id="ItemsGrid"
BorderColor="Black"
ShowFooter="False"
CellPadding="3"
CellSpacing="0"
HeaderStyle-BackColor="#aaaadd"
OnSelectedIndexChanged="IndexChange_Command"
runat="server">
<Columns>
<asp:ButtonColumn Text="Select"
CommandName="Select"/>
</Columns>
</asp:DataGrid>
<hr />
<table border="1" style="border-color:Black; margin:0">
<tr style="background-color:#aaaadd">
<td>
Details
</td>
</tr>
<tr>
<td>
<asp:Label id="DetailsLabel"
runat="server"
Text="No item selected."/>
</td>
</tr>
</table>
</form>
</body>
</html>
<%@ Page Language="C#" AutoEventWireup="True"%>
<%@ Import Namespace="System.Data" %>
<%@ Import Namespace="System.Data.SqlClient" %>
<!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" >
<head runat="server">
<title>Declarative BaseDataList SelectedIndexChanged Example</title>
<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 < 9; i++)
{
dr = dt.NewRow();
dr[0] = i;
dr[1] = "Item " + i.ToString();
dr[2] = 1.23 * (i + 1);
dt.Rows.Add(dr);
}
// Create a DataView from the DataTable.
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 IndexChange_Command(Object sender, EventArgs e)
{
// Display the details of the selected item.
DetailsLabel.Text =
"Item Number: " + ItemsGrid.SelectedItem.Cells[1].Text + "<br />" +
"Description: " + ItemsGrid.SelectedItem.Cells[2].Text + "<br />" +
"Price: $" + ItemsGrid.SelectedItem.Cells[3].Text + "<br />";
}
</script>
</head>
<body>
<form id="form1" runat="server">
<h3>Declarative BaseDataList SelectedIndexChanged Example</h3>
Select an item:
<br /><br />
<asp:DataGrid id="ItemsGrid"
BorderColor="Black"
ShowFooter="False"
CellPadding="3"
CellSpacing="0"
HeaderStyle-BackColor="#aaaadd"
OnSelectedIndexChanged="IndexChange_Command"
runat="server">
<Columns>
<asp:ButtonColumn Text="Select"
CommandName="Select"/>
</Columns>
</asp:DataGrid>
<hr />
<table style="border-width:1; border-color:Black; margin:0">
<tr style="background-color:#aaaadd">
<td>
Details
</td>
</tr>
<tr>
<td>
<asp:Label id="DetailsLabel"
runat="server"
Text="No item selected."/>
</td>
</tr>
</table>
</form>
</body>
</html>
SelectedIndexChanged イベントのイベント ハンドラをプログラムにより提供する方法を次のコード例に示します。
<%@ Page Language="VB" AutoEventWireup="True"%>
<%@ Import Namespace="System.Data" %>
<%@ Import Namespace="System.Data.SqlClient" %>
<!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" >
<head runat="server">
<title>Programmatic BaseDataList SelectedIndexChanged Example</title>
<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(Integer)))
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 8
dr = dt.NewRow()
dr(0) = i
dr(1) = "Item " & i.ToString()
dr(2) = 1.23 * (i + 1)
dt.Rows.Add(dr)
Next i
' Create a DataView from the DataTable.
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
' Register event-handling methods.
AddHandler ItemsGrid.SelectedIndexChanged, AddressOf IndexChange_Command
End Sub
Sub IndexChange_Command(sender As Object, e As EventArgs)
' Display the details of the selected item.
DetailsLabel.Text = "Item Number: " & ItemsGrid.SelectedItem.Cells(1).Text & "<br />" & _
"Description: " & ItemsGrid.SelectedItem.Cells(2).Text & "<br />" & _
"Price: $" & ItemsGrid.SelectedItem.Cells(3).Text & "<br />"
End Sub
</script>
</head>
<body>
<form id="form1" runat="server">
<h3>Programmatic BaseDataList SelectedIndexChanged Example</h3>
Select an item:
<br /><br />
<asp:DataGrid id="ItemsGrid"
BorderColor="Black"
ShowFooter="False"
CellPadding="3"
CellSpacing="0"
HeaderStyle-BackColor="#aaaadd"
DataKeyField="IntegerValue"
OnSelectedIndexChanged="IndexChange_Command"
runat="server">
<Columns>
<asp:ButtonColumn Text="Select"
CommandName="Select"/>
</Columns>
</asp:DataGrid>
<hr />
<table border="1" style="border-color:Black; margin:0">
<tr style="background-color:#aaaadd">
<td>
Details
</td>
</tr>
<tr>
<td>
<asp:Label id="DetailsLabel"
runat="server"
Text="No item selected."/>
</td>
</tr>
</table>
</form>
</body>
</html>
<%@ Page Language="C#" AutoEventWireup="True"%>
<%@ Import Namespace="System.Data" %>
<%@ Import Namespace="System.Data.SqlClient" %>
<!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" >
<head runat="server">
<title>Programmatic BaseDataList SelectedIndexChanged Example</title>
<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 < 9; i++)
{
dr = dt.NewRow();
dr[0] = i;
dr[1] = "Item " + i.ToString();
dr[2] = 1.23 * (i + 1);
dt.Rows.Add(dr);
}
// Create a DataView from the DataTable.
DataView dv = new DataView(dt);
return dv;
}
void IndexChange_Command(Object sender, EventArgs e)
{
// Display the details of the selected item.
DetailsLabel.Text = "Item Number: " + ItemsGrid.SelectedItem.Cells[1].Text + "<br />" +
"Description: " + ItemsGrid.SelectedItem.Cells[2].Text + "<br />" +
"Price: $" + ItemsGrid.SelectedItem.Cells[3].Text + "<br />";
}
void Page_Load(Object sender, EventArgs e)
{
// Load sample data only once, when the page is first loaded.
if (!IsPostBack)
{
// Load sample data.
ItemsGrid.DataSource = CreateDataSource();
ItemsGrid.DataBind();
}
// Register event-handling methods.
ItemsGrid.SelectedIndexChanged += new EventHandler(this.IndexChange_Command);
}
</script>
</head>
<body>
<form id="form1" runat="server">
<h3>Programmatic BaseDataList SelectedIndexChanged Example</h3>
Select an item:
<br /><br />
<asp:DataGrid id="ItemsGrid"
BorderColor="Black"
ShowFooter="False"
CellPadding="3"
CellSpacing="0"
HeaderStyle-BackColor="#aaaadd"
runat="server">
<Columns>
<asp:ButtonColumn Text="Select"
CommandName="Select"/>
</Columns>
</asp:DataGrid>
<hr />
<table border="1" style="border-color:Black; margin:0">
<tr style="background-color:#aaaadd">
<td>
Details
</td>
</tr>
<tr>
<td>
<asp:Label id="DetailsLabel"
runat="server"
Text="No item selected."/>
</td>
</tr>
</table>
</form>
</body>
</html>
プラットフォーム
Windows 98,Windows Server 2000 SP4,Windows CE,Windows Millennium Edition,Windows Mobile for Pocket PC,Windows Mobile for Smartphone,Windows Server 2003,Windows XP Media Center Edition,Windows XP Professional x64 Edition,Windows XP SP2,Windows XP Starter Edition
Microsoft .NET Framework 3.0 は Windows Vista,Microsoft Windows XP SP2,および Windows Server 2003 SP1 でサポートされています。
バージョン情報
.NET Framework
サポート対象 : 3.0,2.0,1.1,1.0
参照
関連項目
BaseDataList クラス
BaseDataList メンバ
System.Web.UI.WebControls 名前空間
OnSelectedIndexChanged
System.EventHandler