ASP.NETDataGrid应用收集

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<%@ Page Language="C#" AutoEventWireup="True" %>
<%@ Import Namespace="System.Data" %> <html>   <script language="C#" runat="server">       DataTable Cart = new DataTable();      DataView CartView;          void Page_Load(Object sender, EventArgs e)       {         DataRow dr;          if (Session["ShoppingCart"] == null)          {                   Cart.Columns.Add(new DataColumn("Qty", typeof(String)));            Cart.Columns.Add(new DataColumn("Item", typeof(String)));            Cart.Columns.Add(new DataColumn("Price", typeof(String)));            Session["ShoppingCart"] = Cart;                         // Create rows and add sample data.            for (int i = 1; i <= 9; i++)             {               dr = Cart.NewRow();               if (i % 2 != 0)                  dr[0] = "2";               else                  dr[0] = "1";               dr[1] = "Item " + i.ToString();               dr[2] = (1.23 * (i + 1)).ToString();               Cart.Rows.Add(dr);            }         }         else            Cart = (DataTable)Session["ShoppingCart"];                    CartView = new DataView(Cart);         CartView.Sort="Item";          if (!IsPostBack)            BindGrid();                          }       void MyDataGrid_Select(Object sender, EventArgs e)       {          Label1.Text = "You selected " +                       MyDataGrid.SelectedItem.Cells[1].Text +                       ".<br>" +                        MyDataGrid.SelectedItem.Cells[1].Text +                       " has an index number of " +                       MyDataGrid.SelectedIndex.ToString() + ".";                                      }      void Select_Button_Click(Object sender, EventArgs e)       {          MyDataGrid.SelectedIndex = 4;                                      }      void UnSelect_Button_Click(Object sender, EventArgs e)       {          MyDataGrid.SelectedIndex = -1;         Label1.Text = "";                                      }       void BindGrid()       {         MyDataGrid.DataSource = CartView;         MyDataGrid.DataBind();      }     </script> <body>    <form runat="server">      <h3>DataGrid Selection Example</h3>       <asp:DataGrid id="MyDataGrid" runat="server"           BorderColor="black"           BorderWidth="1"           CellPadding="3"           Font-Name="Verdana"           Font-Size="8pt"           OnSelectedIndexChanged="MyDataGrid_Select"           AutoGenerateColumns="false">         <HeaderStyle BackColor="#aaaadd">         </HeaderStyle>         <SelectedItemStyle BackColor="Yellow">         </SelectedItemStyle>          <Columns>            <asp:ButtonColumn                 HeaderText="Select Item"                 ButtonType="LinkButton"                 Text="Select"                 CommandName="Select">            </asp:ButtonColumn>             <asp:BoundColumn                  HeaderText="Item"                  ReadOnly="true"                  DataField="Item"/>            <asp:BoundColumn                  HeaderText="Quantity"                  DataField="Qty"/>            <asp:BoundColumn                  HeaderText="Price"                  DataField="Price"/>         </Columns>      </asp:DataGrid>      <br><br>      <asp:Button id="Button1"           Text="Select Item 5"           OnClick="Select_Button_Click"           runat="server"/>      <asp:Button id="Button2"           Text="Unselect Item"           OnClick="UnSelect_Button_Click"           runat="server"/>      <br><br>      <asp:Label id="Label1" runat="server"/>     </form> </body></html>