Solved

XML File

Posted on 2011-03-24
4
352 Views
Last Modified: 2012-05-11
I’m new to vb.NET and I’m creating a project with 5 tables, with the largest table having about 25 records, I would like to use XML.

I need some sample code showing how to
1.  Create the XML database
2.  Create the file structure
3.  Do Inserts
4.  Do Updates
5.  Do Deletes
6.  Do Searches

If anyone has any sample code I would appreciate it.
0
Comment
Question by:PhilChapmanJr
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 2
  • 2
4 Comments
 
LVL 36

Expert Comment

by:Miguel Oz
ID: 35211093
0
 
LVL 2

Author Comment

by:PhilChapmanJr
ID: 35212511
The http://vb.net-informations.com/xml/vb.net-xml-tutorial.htm
has good examples of Createing and searching as XML File

Private Sub cmdCreateXML_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles cmdCreateXML.Click
        Dim writer As New XmlTextWriter("c:\product.xml", System.Text.Encoding.UTF8)

        writer.WriteStartDocument(True)
        writer.Formatting = Formatting.Indented
        writer.Indentation = 2
        writer.WriteStartElement("Table")
        createNode(1, "Product 1", "1000", writer)
        createNode(2, "Product 2", "2000", writer)
        createNode(3, "Product 3", "3000", writer)
        createNode(4, "Product 4", "4000", writer)
        writer.WriteEndElement()
        writer.WriteEndDocument()
        writer.Close()
    End Sub

Private Sub createNode(ByVal pID As String, ByVal pName As String, ByVal pPrice As String, ByVal writer As XmlTextWriter)

        writer.WriteStartElement("Product")
        writer.WriteStartElement("Product_id")
        writer.WriteString(pID)
        writer.WriteEndElement()
        writer.WriteStartElement("Product_name")
        writer.WriteString(pName)
        writer.WriteEndElement()
        writer.WriteStartElement("Product_price")
        writer.WriteString(pPrice)
        writer.WriteEndElement()
        writer.WriteEndElement()

    End Sub

Private Sub cmdSearch_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles cmdSearch.Click

        Dim xmlFile As XmlReader

        xmlFile = XmlReader.Create("c:\product.xml", New XmlReaderSettings())
        Dim ds As New DataSet
        Dim dv As DataView
        ds.ReadXml(xmlFile)

        dv = New DataView(ds.Tables(0))
        dv.Sort = "Product_Name"
        Dim index As Integer = dv.Find("Product 2")

        If index = -1 Then
            MsgBox("Item Not Found")
        Else
            MsgBox(dv(index)("Product_Name").ToString() & "  " & dv(index)("Product_Price").ToString())
        End If

    End Sub

But how would you
Insert a new record, Delete a Record and Update a Record


Example:
How would you insert 5, "Product 5", "5000"
and delete Item 3
and Update Item  2 from 2000 to 2050
0
 
LVL 36

Accepted Solution

by:
Miguel Oz earned 500 total points
ID: 35212542
Creation code looks good, for searching use XPath. something like:
' Load the XmlDocument.
Dim xd As New XmlDocument()
xd.Load("C:\XmlTest.xml")
' Find the node where the Person's attribute ID is 1 using its XPath.
Dim nod As XmlNode = xd.SelectSingleNode("/Table/Product[@Product_Name='Product 2']")

the lilnk below contains a sample on how to search as well.

Note: Sorry forgot to add this link: (sample of add, delete, update under "Add to an XML File", "Delete an XML Node", "Edit an XML File")
http://www.vbforums.com/archive/index.php/t-478692.html
0
 
LVL 2

Author Closing Comment

by:PhilChapmanJr
ID: 35212640
Thanks again for the assistance
0

Featured Post

SharePoint Admin?

Enable Your Employees To Focus On The Core With Intuitive Onscreen Guidance That is With You At The Moment of Need.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

A while ago, I was working on a Windows Forms application and I needed a special label control with reflection (glass) effect to show some titles in a stylish way. I've always enjoyed working with graphics, but it's never too clever to re-invent …
Microsoft Reports are based on a report definition, which is an XML file that describes data and layout for the report, with a different extension. You can create a client-side report definition language (*.rdlc) file with Visual Studio, and build g…
Nobody understands Phishing better than an anti-spam company. That’s why we are providing Phishing Awareness Training to our customers. According to a report by Verizon, only 3% of targeted users report malicious emails to management. With compan…
How to Install VMware Tools in Red Hat Enterprise Linux 6.4 (RHEL 6.4) Step-by-Step Tutorial

751 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question