Output the content of a DataSet as XML
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="OutputDataSet" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" runat="server">
<title>Outputting a DataSet</title>
</head>
<body>
<form id="form1" runat="server">
<div id="container">
<asp:GridView id="grdProducts" runat="server" />
<hr />
<asp:GridView id="grdCustomer" runat="server" />
<hr />
Retrieving via indexing: <asp:Label ID="labSingle" runat="server" />
<hr />
<asp:Button ID="btnXml" runat="server" Text="Output as XML" OnClick="btnXml_Click" />
<br />
<asp:TextBox ID="txtXml" runat="server" Rows="20" Columns="60" TextMode="MultiLine"/>
</div>
</form>
</body>
</html>
File: Default.aspx.cs
using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
public partial class OutputDataSet : System.Web.UI.Page
{
DataSet ds = null;
protected void Page_Load(object sender, EventArgs e)
{
ds = new DataSet();
ds.Tables.Add(MakeCustomerData());
ds.Tables.Add(MakeProductData());
ds.Tables[1].TableName = "Products";
grdCustomer.DataSource = ds.Tables[0].DefaultView;
grdCustomer.DataBind();
grdProducts.DataSource = ds.Tables["Products"].DefaultView;
grdProducts.DataBind();
double sum = 0.0;
int count = 0;
foreach (DataRow dr in ds.Tables["Products"].Rows)
{
double price = (double)dr["Price"];
sum += price;
count++;
}
double average = sum / count;
labSingle.Text = "Average: " + average;
}
private DataTable MakeCustomerData()
{
DataTable table = new DataTable();
DataColumn idCol = new DataColumn();
idCol.ColumnName = "Id";
idCol.DataType = typeof(Int32);
idCol.AllowDBNull = false;
idCol.Unique = true;
idCol.AutoIncrement = true;
DataColumn firstNameCol = new DataColumn("FirstName", typeof(string));
DataColumn lastNameCol = new DataColumn("LastName", typeof(string));
DataColumn phoneCol = new DataColumn("Phone", typeof(string));
table.Columns.Add(idCol);
table.Columns.Add(firstNameCol);
table.Columns.Add(lastNameCol);
table.Columns.Add(phoneCol);
DataRow r1 = table.NewRow();
r1[1] = "A";
r1[2] = "a";
r1[3] = "123-4567";
table.Rows.Add(r1);
DataRow r2 = table.NewRow();
r2["FirstName"] = "B";
r2["LastName"] = "b";
r2["Phone"] = "234-1111";
table.Rows.Add(r2);
DataRow r3 = table.NewRow();
r3["FirstName"] = "C";
r3["LastName"] = "c";
r3["Phone"] = "345-444";
table.Rows.Add(r3);
DataRow r4 = table.NewRow();
r4["FirstName"] = "D";
r4["LastName"] = "d";
r4["Phone"] = "456-2222";
table.Rows.Add(r4);
return table;
}
private DataTable MakeProductData()
{
DataTable table = new DataTable();
DataColumn idCol = new DataColumn();
idCol.ColumnName = "Id";
idCol.DataType = typeof(Int32);
idCol.AllowDBNull = false;
idCol.Unique = true;
idCol.AutoIncrement = true;
DataColumn nameCol = new DataColumn("Name", typeof(string));
DataColumn priceCol = new DataColumn("Price", typeof(double));
table.Columns.Add(idCol);
table.Columns.Add(nameCol);
table.Columns.Add(priceCol);
DataRow r1 = table.NewRow();
r1[1] = "Book";
r1[2] = 49.99;
table.Rows.Add(r1);
DataRow r2 = table.NewRow();
r2[1] = "Apple";
r2[2] = 0.99;
table.Rows.Add(r2);
return table;
}
protected void btnXml_Click(object sender, EventArgs e)
{
string s = ds.GetXml();
txtXml.Text = s;
}
}
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