GridViewSelectEventArgs.NewSelectedIndex プロパティ
アセンブリ: System.Web (system.web.dll 内)

Dim instance As GridViewSelectEventArgs Dim value As Integer value = instance.NewSelectedIndex instance.NewSelectedIndex = value
/** @property */ public int get_NewSelectedIndex () /** @property */ public void set_NewSelectedIndex (int value)
GridView コントロールで選択する新しい行のインデックス。

SelectedIndexChanging イベントは GridView コントロールが選択操作を実行する前に発生するため、このコントロールの SelectedIndex プロパティは、ユーザーが選択した新しい行のインデックスの確認には使用できません。SelectedIndex プロパティには、まだ前回選択された行のインデックスが格納されています。ユーザーが選択した新しい行のインデックスを確認するには、NewSelectedIndex プロパティを使用します。また、このプロパティを使用すると、プログラムによって別の値を設定することで、ユーザーが選択した行のインデックスをオーバーライドすることもできます。

NewSelectedIndex プロパティを使用して、ユーザーが選択した行のインデックスを確認する方法を次の例に示します。
<%@ Page language="VB" %> <script runat="server"> Sub CustomersGridView_SelectedIndexChanged(ByVal sender As Object, ByVal e As EventArgs) ' Get the currently selected row using the SelectedRow property. Dim row As GridViewRow = CustomersGridView.SelectedRow ' Display the company name from the selected row. ' In this example, the third column (index 2) contains ' the company name. Message.Text = "You selected " & row.Cells(2).Text & "." End Sub Sub CustomersGridView_SelectedIndexChanging(ByVal sender As Object, ByVal e As GridViewSelectEventArgs) ' Get the currently selected row. Because the SelectedIndexChanging event ' occurs before the select operation in the GridView control, the ' SelectedRow property cannot be used. Instead, use the Rows collection ' and the NewSelectedIndex property of the e argument passed to this ' event handler. Dim row As GridViewRow = CustomersGridView.Rows(e.NewSelectedIndex) ' You can cancel the select operation by using the Cancel ' property. For this example, if the user selects a customer with ' the ID "ANATR", the select operation is canceled and an error message ' is displayed. If row.Cells(1).Text = "ANATR" Then e.Cancel = True Message.Text = "You cannot select " + row.Cells(2).Text & "." End If End Sub </script> <html> <body> <form runat="server"> <h3>GridView Select Example</h3> <asp:gridview id="CustomersGridView" datasourceid="CustomersSource" autogeneratecolumns="true" autogenerateselectbutton="true" allowpaging="true" selectedindex="0" onselectedindexchanged="CustomersGridView_SelectedIndexChanged" onselectedindexchanging="CustomersGridView_SelectedIndexChanging" runat="server"> <selectedrowstyle backcolor="LightCyan" forecolor="DarkBlue" font-bold="true"/> </asp:gridview> <br/> <asp:label id="Message" forecolor="Red" runat="server"/> <!-- This example uses Microsoft SQL Server and connects --> <!-- to the Northwind sample database. Use an ASP.NET --> <!-- expression to retrieve the connection string value --> <!-- from the Web.config file. --> <asp:sqldatasource id="CustomersSource" selectcommand="Select [CustomerID], [CompanyName], [Address], [City], [PostalCode], [Country] From [Customers]" connectionstring="<%$ ConnectionStrings:NorthWindConnectionString%>" runat="server"/> </form> </body> </html>
<%@ Page language="C#" %> <script runat="server"> void CustomersGridView_SelectedIndexChanged(Object sender, EventArgs e) { // Get the currently selected row using the SelectedRow property. GridViewRow row = CustomersGridView.SelectedRow; // Display the company name from the selected row. // In this example, the third column (index 2) contains // the company name. Message.Text = "You selected " + row.Cells[2].Text + "."; } void CustomersGridView_SelectedIndexChanging(Object sender, GridViewSelectEventArgs e) { // Get the currently selected row. Because the SelectedIndexChanging event // occurs before the select operation in the GridView control, the // SelectedRow property cannot be used. Instead, use the Rows collection // and the NewSelectedIndex property of the e argument passed to this // event handler. GridViewRow row = CustomersGridView.Rows[e.NewSelectedIndex]; // You can cancel the select operation by using the Cancel // property. For this example, if the user selects a customer with // the ID "ANATR", the select operation is canceled and an error message // is displayed. if (row.Cells[1].Text == "ANATR") { e.Cancel = true; Message.Text = "You cannot select " + row.Cells[2].Text + "."; } } </script> <html> <body> <form runat="server"> <h3>GridView Select Example</h3> <asp:gridview id="CustomersGridView" datasourceid="CustomersSource" autogeneratecolumns="true" autogenerateselectbutton="true" allowpaging="true" selectedindex="0" onselectedindexchanged="CustomersGridView_SelectedIndexChanged" onselectedindexchanging="CustomersGridView_SelectedIndexChanging" runat="server"> <selectedrowstyle backcolor="LightCyan" forecolor="DarkBlue" font-bold="true"/> </asp:gridview> <br/> <asp:label id="Message" forecolor="Red" runat="server"/> <!-- This example uses Microsoft SQL Server and connects --> <!-- to the Northwind sample database. Use an ASP.NET --> <!-- expression to retrieve the connection string value --> <!-- from the Web.config file. --> <asp:sqldatasource id="CustomersSource" selectcommand="Select [CustomerID], [CompanyName], [Address], [City], [PostalCode], [Country] From [Customers]" connectionstring="<%$ ConnectionStrings:NorthWindConnectionString%>" runat="server"/> </form> </body> </html>

Windows 98, Windows 2000 SP4, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition
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