XML validation : Schema Validation « XML « ASP.NET Tutorial






<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="XmlValidation" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    <title>Xml Validation</title>
</head>
<body>
    <form id="form1" runat="server">
    <div class="Box">
    <asp:RadioButton id="optValid" 
                     runat="server" 
                     Text="Use Data.xml" 
                     Checked="True" 
                     GroupName="Valid">
        </asp:RadioButton>
    <asp:button id="cmdValidate" 
                runat="server" 
                Text="Validate XML" 
                OnClick="cmdValidate_Click">
        </asp:button>
    </div>
  <div>
    <asp:Label id="lblStatus" runat="server" EnableViewState="False"></asp:Label>
    </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;
using System.Xml.Schema;
using System.IO;
using System.Xml;

public partial class XmlValidation : System.Web.UI.Page
{
  protected void cmdValidate_Click(object sender, EventArgs e)
  {
    string filePath = "Data.xml";
      lblStatus.Text = "";

    XmlReaderSettings settings = new XmlReaderSettings();
        settings.Schemas.Add("yourURI",Request.PhysicalApplicationPath + "Data.xsd");
    settings.ValidationType = ValidationType.Schema;
    settings.ValidationEventHandler += new ValidationEventHandler(ValidateHandler);

    FileStream fs = new FileStream(filePath, FileMode.Open);
    
    XmlReader r = XmlReader.Create(fs, settings);

    while (r.Read())
    {
    }
    fs.Close();

    lblStatus.Text += "<br />Complete.";
  }

  public void ValidateHandler(Object sender, ValidationEventArgs e)
  {
    lblStatus.Text += "Error: " + e.Message + "<br />";
  }
}

File: Data.xml


<?xml version="1.0" standalone="yes"?>

<SuperProProductList xmlns="yourURI" >
    <Product ID="1" Name="Chair">
        <Price>49.33</Price>
    </Product>
    <Product ID="2" Name="Car">
        <Price>43398.55</Price>
    </Product>
    <Product ID="3" Name="Fresh Fruit Basket">
        <Price>49.99</Price>
    </Product>
</SuperProProductList>

File: Data.xsd

<?xml version="1.0"?>
<xs:schema
    targetNamespace="yourURI"
    xmlns:xs="http://www.w3.org/2001/XMLSchema"
    elementFormDefault="qualified"  >
  <xs:element name="SuperProProductList">
    <xs:complexType>
      <xs:sequence maxOccurs="unbounded">
        <xs:element name="Product">
          <xs:complexType>
            <xs:sequence>
              <xs:element name="Price" minOccurs="1" type="xs:double" />
            </xs:sequence>
            <xs:attribute name="ID" use="required" type="xs:int" />
            <xs:attribute name="Name" use="required"  type="xs:string" />
          </xs:complexType>
        </xs:element>
        </xs:sequence>
      </xs:complexType>
  </xs:element>
</xs:schema>








25.5.Schema Validation
25.5.1.XML document validation against XML schema
25.5.2.XML validation