DataGrid或DataView进行求合

Admin | 2007-11-12 19:34:20 | 被阅次数 | 6068

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aspx文件
<%@ Page Inherits="myApp.calcTotals" Src="" %>

<html>
<body bgcolor="white">
<asp:DataGrid id="MyGrid" runat="server"
AutoGenerateColumns="False"
CellPadding="4" CellSpacing="0"
BorderStyle="Solid" BorderWidth="1"
Gridlines="None" BorderColor="Black"
ItemStyle-Font-Name="Verdana"
ItemStyle-Font-Size="9pt"
HeaderStyle-Font-Name="Verdana"
HeaderStyle-Font-Size="10pt"
HeaderStyle-Font-Bold="True"
HeaderStyle-ForeColor="White"
HeaderStyle-BackColor="Blue"
FooterStyle-Font-Name="Verdana"
FooterStyle-Font-Size="10pt"
FooterStyle-Font-Bold="True"
FooterStyle-ForeColor="White"
FooterStyle-BackColor="Blue"
OnItemDataBound="MyDataGrid_ItemDataBound"
ShowFooter="True">

<Columns>
<asp:BoundColumn HeaderText="Title" DataField="title" />
<asp:BoundColumn HeaderText="Price" DataField="price"
ItemStyle-HorizontalAlign="Right"
HeaderStyle-HorizontalAlign="Center" />
</Columns>
</asp:DataGrid>
</body>
</html>

using System;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
using System.Data;
using System.Data.SqlClient;

namespace myApp
{
public class calcTotals : Page
{
protected DataGrid MyGrid;
private double runningTotal = 0;

private void CalcTotal(string _price)
{
try
{
runningTotal += Double.Parse(_price);
}
catch
{
}
}

public void MyDataGrid_ItemDataBound(object sender, DataGridItemEventArgs e)
{
if (e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem)
{
CalcTotal( e.Item.Cells[1].Text );
e.Item.Cells[1].Text = string.Format("{0:c}", Convert.ToDouble(e.Item.Cells[1].Text));
}
else if(e.Item.ItemType == ListItemType.Footer )
{
e.Item.Cells[0].Text="Total";
e.Item.Cells[1].Text = string.Format("{0:c}", runningTotal);
}
}

protected void Page_Load(object sender, EventArgs e)
{
SqlConnection myConnection = new SqlConnection("server=Localhost;database=pubs;uid=sa;pwd=;");
SqlCommand myCommand = new SqlCommand("SELECT title, price FROM Titles WHERE price > 0", myConnection);

try
{
myConnection.Open();
MyGrid.DataSource = myCommand.ExecuteReader();
MyGrid.DataBind();
myConnection.Close();
}
catch(Exception ex)
{
HttpContext.Current.Response.Write(ex.ToString());
}
}
}

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