<%@ 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">
public void Page_Load()
{
if (!IsPostBack)
{
GridView1.DataSource = _sampleData;
GridView1.DataBind();
}
}
protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.Footer)
{
(e.Row.FindControl("txtDiscountOnTotal") as WebControl).Enabled = (comboDiscountType.SelectedValue == "2");
}
else if (e.Row.RowType == DataControlRowType.DataRow)
{
(e.Row.FindControl("txtDiscountOnItem") as WebControl).Enabled = (comboDiscountType.SelectedValue == "1");
}
}
protected void comboDiscountType_SelectedIndexChanged(object sender, EventArgs e)
{
(GridView1.FooterRow.FindControl("txtDiscountOnTotal") as WebControl).Enabled = (comboDiscountType.SelectedValue == "2");
foreach (GridViewRow row in GridView1.Rows)
{
(row.FindControl("txtDiscountOnItem") as WebControl).Enabled = (comboDiscountType.SelectedValue == "1");
}
}
public DataTable _sampleData
{
get
{
DataTable dt = (DataTable)Session["DataTable"];
if (dt == null)
{
dt = new DataTable();
dt.Columns.Add(new DataColumn("ID", typeof(string)));
dt.Columns.Add(new DataColumn("Item", typeof(string)));
dt.Columns.Add(new DataColumn("Price", typeof(string)));
dt.Rows.Add(new object[] { "1", "XX", "12.43", });
dt.Rows.Add(new object[] { "2", "XX1", "11.43", });
dt.Rows.Add(new object[] { "3", "XX2", "13.43", });
Session["DataTable"] = dt;
}
return dt;
}
set
{
Session["DataTable"] = value;
}
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
<title>Untitled Page</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:GridView ID="GridView1" runat="server" OnRowDataBound="GridView1_RowDataBound"
ShowFooter="true" AutoGenerateColumns="false">
<Columns>
<asp:BoundField DataField="Item" HeaderText="Item " />
<asp:BoundField DataField="Price" HeaderText="Price" />
<asp:TemplateField HeaderText="Discount">
<ItemTemplate>
<asp:TextBox ID="txtDiscountOnItem" Width="50px" runat="Server" />
</ItemTemplate>
<FooterTemplate>
<asp:TextBox ID="txtDiscountOnTotal" Width="50px" runat="Server"></asp:TextBox>
</FooterTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
<asp:DropDownList ID="comboDiscountType" runat="server" AutoPostBack="True" OnSelectedIndexChanged="comboDiscountType_SelectedIndexChanged">
<asp:ListItem Value="1">Discount on Items</asp:ListItem>
<asp:ListItem Value="2">Discount on Total</asp:ListItem>
</asp:DropDownList>
</div>
</form>
</body>
</html>