<html>
<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("DateTimeValue", typeof(DateTime)));
dt.Columns.Add(new DataColumn("BoolValue", typeof(bool)));
dt.Columns.Add(new DataColumn("CurrencyValue", typeof(double)));
for (int i = 0; i < 9; i++) {
dr = dt.NewRow();
dr[0] = i;
dr[1] = "Item " + i.ToString();
dr[2] = DateTime.Now;
dr[3] = (i % 2 != 0) ? true : false;
dr[4] = 1.23 * (i+1);
dt.Rows.Add(dr);
}
DataView dv = new DataView(dt);
return dv;
}
void Page_Load(Object sender, EventArgs e)
{
if (Session["DG5_ShoppingCart"] == null) {
Cart = new DataTable();
Cart.Columns.Add(new DataColumn("Item", typeof(string)));
Cart.Columns.Add(new DataColumn("Price", typeof(string)));
Session["DG5_ShoppingCart"] = Cart;
}
else {
Cart = (DataTable)Session["DG5_ShoppingCart"];
}
CartView = new DataView(Cart);
ShoppingCart.DataSource = CartView;
CartView.Sort="Item";
ShoppingCart.DataBind();
MyDataGrid.DataSource = CreateDataSource();
MyDataGrid.DataBind();
}
void Grid_CartCommand(object sender, DataGridCommandEventArgs e) {
DataRow dr = Cart.NewRow();
// e.Item is the row of the table where the command fired
// For bound columns the value is stored in the Text property of TableCell
TableCell itemCell = e.Item.Cells[1];
TableCell priceCell = e.Item.Cells[2];
string item = itemCell.Text;
string price = priceCell.Text;
if (((LinkButton)e.CommandSource).CommandName == "AddToCart") {
dr[0] = item;
dr[1] = price;
Cart.Rows.Add(dr);
}
else { //Remove from Cart
CartView.RowFilter = "Item='"+item+"'";
if (CartView.Count > 0) {
CartView.Delete(0);
}
CartView.RowFilter = "";
}
ShoppingCart.DataBind();
}
</script>
<body>
<h3><font face="Verdana">Using a Template Column in DataGrid</font></h3>
<form runat=server>
<table cellpadding="5">
<tr valign="top">
<td>
<b>Product List</b>
<asp:DataGrid id="MyDataGrid" runat="server"
BorderColor="black"
BorderWidth="1"
GridLines="Both"
CellPadding="3"
CellSpacing="0"
Font-Name="Verdana"
Font-Size="8pt"
HeaderStyle-BackColor="#aaaadd"
AutoGenerateColumns="false"
OnItemCommand="Grid_CartCommand"
>
<Columns>
<asp:TemplateColumn HeaderText="Add/Remove">
<ItemTemplate>
<asp:LinkButton ID=AddButton Text="Add" CommandName="AddToCart" ForeColor="blue" runat="server" />
<asp:LinkButton ID=RemoveButton Text="Remove" CommandName="RemoveFromCart" ForeColor="blue" runat="server" />
</ItemTemplate>
</asp:TemplateColumn>
<asp:BoundColumn HeaderText="Item" DataField="StringValue"/>
<asp:BoundColumn HeaderText="Price" DataField="CurrencyValue" DataFormatString="{0:c}" ItemStyle-HorizontalAlign="right" />
<asp:TemplateColumn HeaderText="Assembly required?">
<ItemTemplate>
<asp:CheckBox ID=Chk1 Checked='<%# DataBinder.Eval(Container.DataItem, "BoolValue") %>' Enabled="false" runat="server" />
</ItemTemplate>
</asp:TemplateColumn>
</Columns>
</asp:DataGrid>
</td><td>
<b>Shopping Cart</b>
<asp:DataGrid id="ShoppingCart" runat="server"
BorderColor="black"
BorderWidth="1"
CellPadding="3"
Font-Name="Verdana"
Font-Size="8pt"
HeaderStyle-BackColor="#aaaadd"
/>
</td>
</tr>
</table>
</form>
</body>
</html>
