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Module 12: Reading and Writing XML Data

Overview ,[object Object],[object Object],[object Object],[object Object]

Lesson: Overview of XML Architecture in ASP.NET ,[object Object],[object Object]

What is XML? <?xml version="1.0"?> <authors> <author ID="1"> <name>Jay</name> </author>  </authors> ,[object Object],[object Object],[object Object],[object Object],Processing Instruction Elements Attributes Comments

XML Core Technologies ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Lesson: XML and the DataSet Object ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Why Use XML with Datasets? ,[object Object],[object Object],[object Object],[object Object],Human Readable Mainframe Readable XML File Or Stream Browser Readable Web Server DataSet Firewall

Overview of XML and Datasets XML File DataSet Object XmlDataDocument Object XslTransform Object XML or HTML File Database DataAdapter ReadXML Doc.Save WriteXML XSLT File XML File XML File

[object Object],[object Object],[object Object],The XML-Based Methods of the DataSet Object DataSet ds = new DataSet(); ds.ReadXml(Server.MapPath("filename.xml")); DataSet ds = new DataSet(); SqlDataAdapter da = new SqlDataAdapter("select * from Authors", conn); da.Fill(ds); ds.WriteXml(Server.MapPath("filename.xml")); string strXmlDS = ds.GetXml(); Visual Basic .NET Code Example

Demonstration: Reading and Writing XML to and from a DataSet ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Practice: Using the ReadXml Method ,[object Object],[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],Creating Nested XML Data Dim dr As New DataRelation _ ("name", parentCol, childCol) dr.Nested = True ds.Relations.Add(dr) <Title name="title1" /> <Title name="title2" /> <Title name="title3" /> <Publisher name="pub1" /> <Publisher name="pub2" /> <Publisher name="pub1" > <Title name="title1" /> <Title name="title3" /> </Publisher> <Publisher name="pub2" > <Title name="title2" /> </Publisher> DataRelation dr = new DataRelation("name", parentCol, childCol); dr.Nested = true; ds.Relations.Add(dr);

Demonstration: Creating Nested XML ,[object Object],[object Object],[object Object],[object Object]

Lesson: Working with XML Data ,[object Object],[object Object],[object Object],[object Object],[object Object]

Overview of Synchronizing a DataSet with an XmlDataDocument Database DataAdapter DataSet Tables XmlDataDocument XML Transformations Other XML Document Types XML Document Navigation Synchronized System.Data System.Xml

[object Object],[object Object],How to Synchronize a DataSet with an XmlDataDocument Dim ds As New DataSet() 'fill in ds Dim objXmlDataDoc As New XmlDataDocument(ds) XmlDataDocument objXmlDataDoc = new XmlDataDocument(); objXmlDataDoc.Load(Server.MapPath ("file.xml")); -or- objXmlDataDoc.DataSet.ReadXml(Server.MapPath ("file.xml")); DataSet ds = new DataSet(); //fill in ds objXmlDataDoc = new XmlDataDocument(ds); Dim objXmlDataDoc As New XmlDataDocument() objXmlDataDoc.Load(Server.MapPath ("file.xml")) -or- objXmlDataDoc.DataSet.ReadXml(Server.MapPath ("file.xml"))

Working with an XmlDataDocument ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],dg.DataSource = objXmlDataDoc.DataSet Dim elem As XmlElement elem = objXmlDataDoc.GetElementFromRow _ (ds.Tables(0).Rows(1)) XmlElement elem; elem = objXmlDataDoc.GetElementFromRow(ds.Tables[0].Rows[1]); dg.DataSource = objXmlDataDoc.DataSet;

Transforming XML Data with XSLT ,[object Object],[object Object],Dim ds As New DataSet() 'fill in DataSet ... Dim xmlDoc As New XmlDataDocument(ds) Dim xslTran As New XslTransform() xslTran.Load(Server.MapPath("PubTitles.xsl")) Dim writer As New XmlTextWriter _ (Server.MapPath("PubTitles_output.html"), _ System.Text.Encoding.UTF8) xslTran.Transform(xmlDoc, Nothing, writer) writer.Close() C# Code Example

Demonstration: Transforming Data with XSLT ,[object Object],[object Object],[object Object]

Lesson: Using the XML Web Server Control ,[object Object],[object Object],[object Object]

What is the XML Web Server Control? ,[object Object],[object Object],<asp:Xml id=" Xml1 " Document=" XmlDocument object to display " DocumentContent=" String of XML " DocumentSource=" Path to XML Document " Transform=" XslTransform object " TransformSource=" Path to XSL Document " runat="server"/>

Loading and Saving XML Data ,[object Object],[object Object],[object Object],xmlCtl.Document.Save(Server.MapPath("text.xml")) xmlCtl.Document.Load(Server.MapPath("text.xml")) <asp:Xml id="xmlCtl" runat="server" /> xmlCtl.Document.Save(Server.MapPath("text.xml")) ; xmlCtl.Document.Load(Server.MapPath("text.xml"));

Demonstration: Using the XML Web Server Control ,[object Object],[object Object],[object Object],[object Object],[object Object]

Review ,[object Object],[object Object],[object Object],[object Object]

Lab 12: Reading XML Data Medical Medical.aspx Benefits Home Page Default.aspx Life Insurance Life.aspx Retirement Retirement.aspx Dental Dental.aspx Dentists Doctors Doctors.aspx Doctors Logon Page Login.aspx Registration Register.aspx Coho Winery Prospectus Prospectus.aspx XML Web Service dentalService1.asmx Page Header Header.ascx ASPState tempdb Lab Web Application User Control namedate.ascx Menu Component Class1.vb or Class1.cs XML Files Web. config

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