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

コマンドのソース。

CommandSource プロパティを使用して、イベントを発生させたコマンドのソースを確認します。このイベントは DataGrid コントロールのページ選択要素のボタンをクリックした場合にだけ発生するため、返されるソースはページ選択要素を表す DataGridItem オブジェクトです。

CommandSource プロパティを使用して、イベントを発生させるコマンドのソースをプログラムによって制御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" %> <html> <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 100 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 Check_Change(sender As Object, e As EventArgs) ' Allow or prevent paging depending on the user's selection. If AllowPagingCheckBox.Checked Then ItemsGrid.AllowPaging = True Else ItemsGrid.AllowPaging = False End If ' Rebind the data to refresh the DataGrid control. ItemsGrid.DataSource = CreateDataSource() ItemsGrid.DataBind() End Sub Sub Grid_Change(sender As Object, e As DataGridPageChangedEventArgs) ' For the DataGrid control to navigate to the correct page when ' paging is allowed, the CurrentPageIndex property must be updated ' programmatically. This process is usually accomplished in the ' event-handling method for the PageIndexChanged event. ' Set CurrentPageIndex to the page the user clicked. ItemsGrid.CurrentPageIndex = e.NewPageIndex ' Rebind the data to refresh the DataGrid control. ItemsGrid.DataSource = CreateDataSource() ItemsGrid.DataBind() End Sub </script> <body> <form runat=server> <h3>DataGrid AllowPaging Example</h3> Select whether to allow paging in the DataGrid control. <br><br> <b>Product List</b> <asp:DataGrid id="ItemsGrid" BorderColor="black" BorderWidth="1" CellPadding="3" AutoGenerateColumns="False" PageSize="10" AllowPaging="True" OnPageIndexChanged="Grid_Change" runat="server"> <HeaderStyle BackColor="#00aaaa"> </HeaderStyle> <Columns> <asp:BoundColumn DataField="IntegerValue" SortExpression="IntegerValue" HeaderText="Item"/> <asp:BoundColumn DataField="StringValue" SortExpression="StringValue" HeaderText="Description"/> <asp:BoundColumn DataField="CurrencyValue" HeaderText="Price" SortExpression="CurrencyValue" DataFormatString="{0:c}"> <ItemStyle HorizontalAlign="Right"> </ItemStyle> </asp:BoundColumn> </Columns> </asp:DataGrid> <hr> <table cellpadding="5"> <tr> <td> <asp:CheckBox id="AllowPagingCheckBox" Text="Allow paging" AutoPostBack="True" Checked="True" OnCheckedChanged="Check_Change" runat="server"/> </td> </tr> </table> </form> </body> </html>
<%@ Page Language="C#" AutoEventWireup="True" %> <%@ Import Namespace="System.Data" %> <html> <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<=100; i++) { dr = dt.NewRow(); dr[0] = i; dr[1] = "Item " + i.ToString(); dr[2] = 1.23 * (i + 1); dt.Rows.Add(dr); } 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 Check_Change(Object sender, EventArgs e) { // Allow or prevent paging depending on the user's selection. if (AllowPagingCheckBox.Checked) { ItemsGrid.AllowPaging = true; } else { ItemsGrid.AllowPaging = false; } // Rebind the data to refresh the DataGrid control. ItemsGrid.DataSource = CreateDataSource(); ItemsGrid.DataBind(); } void Grid_Change(Object sender, DataGridPageChangedEventArgs e) { // For the DataGrid control to navigate to the correct page when // paging is allowed, the CurrentPageIndex property must be updated // programmatically. This process is usually accomplished in the // event-handling method for the PageIndexChanged event. // Set CurrentPageIndex to the page the user clicked. ItemsGrid.CurrentPageIndex = e.NewPageIndex; // Rebind the data to refresh the DataGrid control. ItemsGrid.DataSource = CreateDataSource(); ItemsGrid.DataBind(); } </script> <body> <form runat=server> <h3>DataGrid AllowPaging Example</h3> Select whether to allow paging in the DataGrid control. <br><br> <b>Product List</b> <asp:DataGrid id="ItemsGrid" BorderColor="black" BorderWidth="1" CellPadding="3" AutoGenerateColumns="False" PageSize="10" AllowPaging="True" OnPageIndexChanged="Grid_Change" runat="server"> <HeaderStyle BackColor="#00aaaa"> </HeaderStyle> <Columns> <asp:BoundColumn DataField="IntegerValue" SortExpression="IntegerValue" HeaderText="Item"/> <asp:BoundColumn DataField="StringValue" SortExpression="StringValue" HeaderText="Description"/> <asp:BoundColumn DataField="CurrencyValue" HeaderText="Price" SortExpression="CurrencyValue" DataFormatString="{0:c}"> <ItemStyle HorizontalAlign="Right"> </ItemStyle> </asp:BoundColumn> </Columns> </asp:DataGrid> <hr> <table cellpadding="5"> <tr> <td> <asp:CheckBox id="AllowPagingCheckBox" Text="Allow paging" AutoPostBack="True" Checked="True" OnCheckedChanged="Check_Change" runat="server"/> </td> </tr> </table> </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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