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DataGridColumn.HeaderText (Propiedad)
Espacio de nombres: System.Web.UI.WebControls
Ensamblado: System.Web (en System.Web.dll)
Valor de propiedad
Tipo: System.String Precaución |
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<%@ 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 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))); dt.Columns.Add(new DataColumn("BooleanValue", typeof(bool))); // Populate the table with sample values. for (int i = 0; i < 5; i++) { dr = dt.NewRow(); dr[0] = i; dr[1] = "Item " + i.ToString(); dr[2] = 1.23 * (i + 1); dr[3] = false; dt.Rows.Add(dr); } // To persist the data source between posts to the server, store // it in session state. Session["Source"] = dt; 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) { // Make sure to set the header text before binding the data to // the DataGrid control; otherwise, the change will not appear // until the next time the page is refreshed. ItemsGrid.Columns[0].HeaderText = "Item"; ItemsGrid.DataSource = CreateDataSource(); ItemsGrid.DataBind(); } } void Button_Click(Object sender, EventArgs e) { double subtotal = 0.0; // Update the data source with the user's selection and // calculate the subtotal. DataTable dt = UpdateSource(ref subtotal); // Display the subtotal in the footer section of the third column. ItemsGrid.Columns[2].FooterText = "Subtotal: " + subtotal.ToString("c"); // Create a DataView and bind it to the DataGrid control. DataView dv = new DataView(dt); ItemsGrid.DataSource = dv; ItemsGrid.DataBind(); } DataTable UpdateSource(ref double subtotal) { // Retrieve the data table from session state. DataTable dt = (DataTable)Session["Source"]; // Iterate through the Items collection and update the data source // with the user's selections. If an item is selected, add the // amount of the item to the subtotal. foreach (DataGridItem item in ItemsGrid.Items) { // Retrieve the SelectCheckBox CheckBox control from the // specified item (row) in the DataGrid control. CheckBox selection = (CheckBox)item.FindControl("SelectCheckBox"); if (selection != null) { // Update the BooleanValue field with the value of the check box. dt.Rows[item.ItemIndex][3] = selection.Checked; // Add the value of the item to the subtotal if the item is // selected. if (selection.Checked) { subtotal += Convert.ToDouble(item.Cells[2].Text.Substring(1)); } } } // Save the data source. Session["Source"] = dt; return dt; } </script> <head runat="server"> <title>DataGridColumn HeaderText and FooterText Example</title> </head> <body> <form id="form1" runat="server"> <h3>DataGridColumn HeaderText and FooterText Example</h3> <b>Product List</b> <asp:DataGrid id="ItemsGrid" BorderColor="black" BorderWidth="1" CellPadding="3" ShowFooter="True" AutoGenerateColumns="False" runat="server"> <HeaderStyle BackColor="#00aaaa"> </HeaderStyle> <FooterStyle BackColor="#00aaaa"> </FooterStyle> <Columns> <asp:BoundColumn DataField="IntegerValue"/> <asp:BoundColumn DataField="StringValue" HeaderText="Description"/> <asp:BoundColumn DataField="CurrencyValue" HeaderText="Price" DataFormatString="{0:c}"> <ItemStyle HorizontalAlign="Right"> </ItemStyle> </asp:BoundColumn> <asp:TemplateColumn HeaderText="Select Item"> <ItemTemplate> <asp:CheckBox id="SelectCheckBox" Text="Add to Cart" Checked='<%# DataBinder.Eval(Container.DataItem, "BooleanValue") %>' runat="server"/> </ItemTemplate> </asp:TemplateColumn> </Columns> </asp:DataGrid> <br /><br /> <asp:Button id="SubmitButton" Text="Submit" OnClick = "Button_Click" runat="server"/> </form> </body> </html>
Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (no se admite el rol Server Core), Windows Server 2008 R2 (se admite el rol Server Core con SP1 o versiones posteriores; no se admite Itanium)
.NET Framework no admite todas las versiones de todas las plataformas. Para obtener una lista de las versiones compatibles, vea Requisitos de sistema de .NET Framework.
