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Il presente articolo è stato tradotto automaticamente. Passare il puntatore sulle frasi nell'articolo per visualizzare il testo originale. Ulteriori informazioni.
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Traduzione
Originale
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Proprietà DataGrid.AllowPaging
.NET Framework 4.5
Spazio dei nomi: System.Web.UI.WebControls
Assembly: System.Web (in System.Web.dll)
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<%@ Page Language="VB" AutoEventWireup="True" %> <%@ Import Namespace="System.Data" %> <!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" > <script language="VB" runat="server"> Dim Cart As DataTable Dim CartView As DAtaView Function CreateDataSource() As ICollection Dim dt As New DataTable() Dim dr As DataRow dt.Columns.Add(New DataColumn("IntegerValue", GetType(Int32))) dt.Columns.Add(New DataColumn("StringValue", GetType(String))) dt.Columns.Add(New DataColumn("CurrencyValue", GetType(Double))) Dim i As Integer For i = 0 To 99 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 New DataView(dt) Return dv End Function 'CreateDataSource Sub Page_Load(sender As Object, e As EventArgs) If Not IsPostBack Then ' Need to load this data only once. ItemsGrid.DataSource = CreateDataSource() ItemsGrid.DataBind() End If If CheckBox1.Checked Then ItemsGrid.PagerStyle.Mode = PagerMode.NumericPages Else ItemsGrid.PagerStyle.Mode = PagerMode.NextPrev End If End Sub 'Page_Load Sub Grid_Change(sender As Object, e As DataGridPageChangedEventArgs) ' Set CurrentPageIndex to the page the user clicked. ItemsGrid.CurrentPageIndex = e.NewPageIndex ' Rebind the data. ItemsGrid.DataSource = CreateDataSource() ItemsGrid.DataBind() End Sub 'Grid_Change </script> <head runat="server"> <title>DataGrid Paging Example</title> </head> <body> <form id="form1" runat="server"> <h3>DataGrid Paging Example</h3> <asp:DataGrid id="ItemsGrid" runat="server" BorderColor="black" BorderWidth="1" CellPadding="3" AllowPaging="true" AutoGenerateColumns="false" OnPageIndexChanged="Grid_Change"> <HeaderStyle BackColor="#00aaaa"> </HeaderStyle> <PagerStyle Mode="NextPrev"> </PagerStyle> <Columns> <asp:BoundColumn HeaderText="Number" DataField="IntegerValue"/> <asp:BoundColumn HeaderText="Item" DataField="StringValue"/> <asp:BoundColumn HeaderText="Price" DataField="CurrencyValue" DataFormatString="{0:c}"> <ItemStyle HorizontalAlign="right"> </ItemStyle> </asp:BoundColumn> </Columns> </asp:DataGrid> <br /> <asp:CheckBox id="CheckBox1" Text="Show page navigation" AutoPostBack="true" runat="server"/> </form> </body> </html>
<%@ Page Language="C#" AutoEventWireup="True" %> <%@ Import Namespace="System.Data" %> <!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" > <script language="C#" runat="server"> DataTable Cart; DataView CartView; ICollection CreateDataSource() { DataTable dt = new DataTable(); DataRow dr; dt.Columns.Add(new DataColumn("IntegerValue", typeof(Int32))); dt.Columns.Add(new DataColumn("StringValue", typeof(string))); dt.Columns.Add(new DataColumn("CurrencyValue", typeof(double))); 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) { if (!IsPostBack) { // Need to load this data only once. ItemsGrid.DataSource = CreateDataSource(); ItemsGrid.DataBind(); } if (CheckBox1.Checked) ItemsGrid.PagerStyle.Mode = PagerMode.NumericPages; else ItemsGrid.PagerStyle.Mode = PagerMode.NextPrev; } void Grid_Change(Object sender, DataGridPageChangedEventArgs e) { // Set CurrentPageIndex to the page the user clicked. ItemsGrid.CurrentPageIndex = e.NewPageIndex; // Rebind the data. ItemsGrid.DataSource = CreateDataSource(); ItemsGrid.DataBind(); } </script> <head runat="server"> <title>DataGrid Paging Example</title> </head> <body> <form id="form1" runat="server"> <h3>DataGrid Paging Example</h3> <asp:DataGrid id="ItemsGrid" runat="server" BorderColor="black" BorderWidth="1" CellPadding="3" AllowPaging="true" AutoGenerateColumns="false" OnPageIndexChanged="Grid_Change"> <HeaderStyle BackColor="#00aaaa"> </HeaderStyle> <PagerStyle Mode="NextPrev"> </PagerStyle> <Columns> <asp:BoundColumn HeaderText="Number" DataField="IntegerValue"/> <asp:BoundColumn HeaderText="Item" DataField="StringValue"/> <asp:BoundColumn HeaderText="Price" DataField="CurrencyValue" DataFormatString="{0:c}"> <ItemStyle HorizontalAlign="right"> </ItemStyle> </asp:BoundColumn> </Columns> </asp:DataGrid> <br /> <asp:CheckBox id="CheckBox1" Text="Show page navigation" AutoPostBack="true" runat="server"/> </form> </body> </html>
<%@ Page Language="VB" %> <%@ Import Namespace="System.Data" %> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <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(ByVal sender As Object, ByVal 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(ByVal sender As Object, ByVal e As EventArgs) ' Allow or prevent paging depending on the user's selection. ItemsGrid.AllowPaging = AllowPagingCheckBox.Checked() ' Rebind the data to refresh the DataGrid control. ItemsGrid.DataSource = CreateDataSource() ItemsGrid.DataBind() End Sub Sub Grid_Change(ByVal sender As Object, ByVal 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> <html xmlns="http://www.w3.org/1999/xhtml" > <head id="Head2" runat="server"> <title></title> </head> <body> <form id="form1" runat="server"> <div> <h3>DataGrid AllowPaging Example</h3> <p>Select whether to allow paging in the DataGrid control.<br /> <asp:CheckBox id="AllowPagingCheckBox" Text="Allow paging" AutoPostBack="True" Checked="True" OnCheckedChanged="Check_Change" runat="server" /> </p> <hr /> <asp:Label ID="Label1" runat="server" AssociatedControlID="ItemsGrid" Font-Bold="true">Product List</asp:Label> <asp:DataGrid id="ItemsGrid" runat="server" BorderColor="Gray" BorderWidth="1" CellPadding="3" UseAccessibleHeader="true" AutoGenerateColumns="False" PageSize="10" AllowPaging="True" OnPageIndexChanged="Grid_Change"> <HeaderStyle BackColor="LightBlue" /> <Columns> <asp:BoundColumn DataField="IntegerValue" SortExpression="IntegerValue" ItemStyle-HorizontalAlign="center" HeaderText="Item" /> <asp:BoundColumn DataField="StringValue" HeaderText="Description" ItemStyle-HorizontalAlign="left" SortExpression="StringValue" /> <asp:BoundColumn DataField="CurrencyValue" HeaderText="Price" SortExpression="CurrencyValue" DataFormatString="{0:c}" /> </Columns> <ItemStyle HorizontalAlign="Right" /> </asp:DataGrid> </div> </form> </body> </html>
<%@ Page Language="C#" %> <%@ Import Namespace="System.Data" %> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <script runat="server"> private 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; } private 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(); } } private void Check_Change(Object sender, EventArgs e) { // Allow or prevent paging depending // on the user's selection. ItemsGrid.AllowPaging = AllowPagingCheckBox.Checked; // Rebind the data to refresh the DataGrid control. ItemsGrid.DataSource = CreateDataSource(); ItemsGrid.DataBind(); } private 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> <html xmlns="http://www.w3.org/1999/xhtml" > <head id="Head1" runat="server"> <title>DataGrid AllowPaging Example</title> </head> <body> <form id="form1" runat="server"> <div> <h3>DataGrid AllowPaging Example</h3> <p>Select whether to allow paging in the DataGrid control.<br /> <asp:CheckBox id="AllowPagingCheckBox" Text="Allow paging" AutoPostBack="True" Checked="True" OnCheckedChanged="Check_Change" runat="server" /> </p> <hr /> <asp:Label runat="server" AssociatedControlID="ItemsGrid" Font-Bold="true">Product List</asp:Label> <asp:DataGrid id="ItemsGrid" runat="server" BorderColor="Gray" BorderWidth="1" CellPadding="3" AutoGenerateColumns="False" UseAccessibleHeader="true" PageSize="10" AllowPaging="True" OnPageIndexChanged="Grid_Change"> <HeaderStyle BackColor="LightBlue" /> <Columns> <asp:BoundColumn DataField="IntegerValue" SortExpression="IntegerValue" ItemStyle-HorizontalAlign="center" HeaderText="Item" /> <asp:BoundColumn DataField="StringValue" HeaderText="Description" ItemStyle-HorizontalAlign="left" SortExpression="StringValue" /> <asp:BoundColumn DataField="CurrencyValue" HeaderText="Price" SortExpression="CurrencyValue" DataFormatString="{0:c}" /> </Columns> <ItemStyle HorizontalAlign="Right" /> </asp:DataGrid> </div> </form> </body> </html>
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