TemplateColumn Class
.NET Framework 2.0
Represents a column type for the DataGrid control that allows you to customize the layout of controls in the column.
Namespace: System.Web.UI.WebControls
Assembly: System.Web (in system.web.dll)
Assembly: System.Web (in system.web.dll)
Use the TemplateColumn column type in a DataGrid control to create a column with a customized control layout. You can provide a custom appearance for the heading section, the footer section, and the items section of the column by using the HeaderTemplate, FooterTemplate, and ItemTemplate properties, respectively. You can also control how an item being edited is displayed in the TemplateColumn object by setting the EditItemTemplate property.
The following code example demonstrates how to use the TemplateColumn class to create a column in the DataGrid control with a custom layout.
<%@ Page Language="C#" AutoEventWireup="True" %> <%@ Import Namespace="System.Data" %> <html> <script runat="server"> DataTable Store = new DataTable(); DataView StoreView; void Page_Load(Object sender, EventArgs e) { if(Session["StoreData"] == null) { DataRow dr; Store = new DataTable(); Store.Columns.Add(new DataColumn("Tax", typeof(String))); Store.Columns.Add(new DataColumn("Item", typeof(String))); Store.Columns.Add(new DataColumn("Price", typeof(String))); Session["StoreData"] = Store; // Create sample data. for (int i = 1; i <= 4; i++) { dr = Store.NewRow(); dr[0] = "0.0%"; dr[1] = "Item " + i.ToString(); dr[2] = (1.23 * (i + 1)).ToString(); Store.Rows.Add(dr); } } else Store = (DataTable)Session["StoreData"]; StoreView = new DataView(Store); StoreView.Sort="Item"; if(!IsPostBack) BindGrid(); } void MyDataGrid_Edit(Object sender, DataGridCommandEventArgs e) { MyDataGrid.EditItemIndex = e.Item.ItemIndex; BindGrid(); } void MyDataGrid_Cancel(Object sender, DataGridCommandEventArgs e) { MyDataGrid.EditItemIndex = -1; BindGrid(); } void MyDataGrid_Update(Object sender, DataGridCommandEventArgs e) { // Get the text box that contains the price to edit. // For bound columns the edited value is stored in a text box. // The text box is the first control in the Controls collection. TextBox priceText = (TextBox)e.Item.Cells[3].Controls[0]; // Get the check box that indicates whether to include tax from the // TemplateColumn. Notice that in this case, the check box control is // second control in the Controls collection. CheckBox taxCheck = (CheckBox)e.Item.Cells[2].Controls[1]; String item = e.Item.Cells[1].Text; String price = priceText.Text; DataRow dr; // With a database, use an update command. Since the data source is // an in-memory DataTable, delete the old row and replace it with a new one. // Remove old entry. StoreView.RowFilter = "Item='" + item + "'"; if (StoreView.Count > 0) StoreView.Delete(0); StoreView.RowFilter = ""; // Add new entry. dr = Store.NewRow(); if (taxCheck.Checked) dr[0] = "8.6%"; else dr[0] = "0.0%"; dr[1] = item; dr[2] = price; Store.Rows.Add(dr); MyDataGrid.EditItemIndex = -1; BindGrid(); } void BindGrid() { MyDataGrid.DataSource = StoreView; MyDataGrid.DataBind(); } </script> <body> <form runat="server"> <h3>TemplateColumn Example</h3> <asp:DataGrid id="MyDataGrid" runat="server" BorderColor="black" CellPadding="2" OnEditCommand="MyDataGrid_Edit" OnCancelCommand="MyDataGrid_Cancel" OnUpdateCommand="MyDataGrid_Update" ShowFooter="True" AutoGenerateColumns="false"> <Columns> <asp:EditCommandColumn EditText="Edit" CancelText="Cancel" UpdateText="Update" ItemStyle-Wrap="false" HeaderText="Edit Controls"/> <asp:BoundColumn HeaderText="Description" ReadOnly="true" DataField="Item"/> <asp:TemplateColumn> <HeaderTemplate> <b> Tax </b> </HeaderTemplate> <ItemTemplate> <asp:Label Text='<%# DataBinder.Eval(Container.DataItem, "Tax") %>' runat="server"/> </ItemTemplate> <EditItemTemplate> <asp:CheckBox Text="Taxable" runat="server"/> </EditItemTemplate> <FooterTemplate> <asp:HyperLink id="HyperLink1" Text="Microsoft" NavigateUrl="http://www.microsoft.com" runat="server"/> </FooterTemplate> </asp:TemplateColumn> <asp:BoundColumn HeaderText="Price" DataField="Price"/> </Columns> </asp:DataGrid> </form> </body> </html>
- AspNetHostingPermission for operating in a hosted environment. Demand value: LinkDemand; Permission value: Minimal.
- AspNetHostingPermission for operating in a hosted environment. Demand value: InheritanceDemand; Permission value: Minimal.
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
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see System Requirements.
