Solved

How do I create a module to parse a XML file and then populate differnt drop down menues?

Posted on 2009-03-30
4
190 Views
Last Modified: 2013-11-26
Hello everybody,

I am very new to XML specially when it comes to software developing. I've work with it before but in web development. A frind of mine asked me to create a program using VB.NET to control his store and I thought that using XML was the best choice because of performance and it's easy to update.

I've created a XML file which holds the items he sells but trully, I don't know how to create a function inside a module to handle that file and then use it to populate different fields (text boxes, combo boxes, etc.) in a form.

The structure I'm using within XML is this:

<?xml version="1.0" encoding="utf-8"?>
<Items>
  <Item>
    <ID>10001</ID>
    <Name>Item 1</Name>
    <Type>Food</Type>
    <Weight>31</Weight>
    <Price>9.99</Price>
  </Item>
  <Item>
    <ID>10002</ID>
    <Name>Item 2</Name>
    <Type>Tool</Type>
    <Weight>700</Weight>
    <Price>39.99</Price>
  </Item>
</NewData>

I would like for example, to be able to display all food items in a grid or whatever, only when the Food cathegory is selected in a dropdown menu.

How can I do this?

Thanks in advance!
0
Comment
Question by:Caracena
  • 2
4 Comments
 
LVL 2

Expert Comment

by:devlinb
ID: 24022492
You could write the xml file into a dataset then assign the datasource of the grid to this dataset:
Dim ds As New DataSet
ds.WriteXml("C:\filename.xml")
DataGridView1.DataSource = ds

Open in new window

0
 
LVL 27

Accepted Solution

by:
nmarun earned 500 total points
ID: 24022692
Here's what I have:

my xml:
<?xml version="1.0" encoding="utf-8"?>
<Items>
  <Item>
    <ID>10001</ID>
    <Name>Item 1</Name>
    <Type>Food</Type>
    <Weight>31</Weight>
    <Price>9.99</Price>
  </Item>
  <Item>
    <ID>10002</ID>
    <Name>Item 2</Name>
    <Type>Tool</Type>
    <Weight>700</Weight>
    <Price>39.99</Price>
  </Item>
  <Item>
    <ID>10003</ID>
    <Name>Item 3</Name>
    <Type>Food</Type>
    <Weight>15</Weight>
    <Price>9.99</Price>
  </Item>
  <Item>
    <ID>10004</ID>
    <Name>Item 4</Name>
    <Type>Tool</Type>
    <Weight>55</Weight>
    <Price>250</Price>
  </Item>
</Items>
 
my aspx:
<asp:DropDownList ID="ddlTest" runat="server" AutoPostBack="true"
    onselectedindexchanged="ddlTest_SelectedIndexChanged" />
<br />
 
<asp:Repeater ID="rptTest" runat="server" >
    <ItemTemplate>
    ID: <%#((XmlNode)Container.DataItem)["ID"].InnerText%>
    <br />
    Name: <%#((XmlNode)Container.DataItem)["Name"].InnerText%>
    <br />
    Weight: <%#((XmlNode)Container.DataItem)["Weight"].InnerText%>
    <br />
    Price: <%#((XmlNode)Container.DataItem)["Price"].InnerText%>
    <br />
    </ItemTemplate>
</asp:Repeater>
 
my code-behind:
Protected Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs)
    If Not IsPostBack Then
        Dim xmlDocument As New XmlDocument()
        xmlDocument.Load(Server.MapPath("SiteMapNode.xml"))
        Dim types As XmlNodeList = xmlDocument.SelectNodes("//Items/Item/Type")
        For i As Integer = 0 To types.Count - 1
            Dim li As New ListItem(types(i).InnerText, types(i).InnerText)
            If Not ddlTest.Items.Contains(li) Then
                ddlTest.Items.Add(li)
            End If
        Next
    End If
End Sub
 
Protected Sub ddlTest_SelectedIndexChanged(ByVal sender As Object, ByVal e As EventArgs)
    Dim xmlDocument As New XmlDocument()
    xmlDocument.Load(Server.MapPath("SiteMapNode.xml"))
    Dim nodes As XmlNodeList = xmlDocument.SelectNodes("/Items/Item[Type='" & ddlTest.SelectedItem.Value & "']")
    rptTest.DataSource = nodes
    rptTest.DataBind()
    
End Sub

Open in new window

0
 
LVL 27

Expert Comment

by:nmarun
ID: 24022715
Make sure you add this line in your aspx page just below the <%@ Page.. declaration:
<%@ Import Namespace="System.Xml"%>
and
Imports System.Xml
line in the code-behind file.
0

Featured Post

Announcing the Most Valuable Experts of 2016

MVEs are more concerned with the satisfaction of those they help than with the considerable points they can earn. They are the types of people you feel privileged to call colleagues. Join us in honoring this amazing group of Experts.

Question has a verified solution.

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

Suggested Solutions

Summary Displaying images in RichTextBox is a common requirement with limited solutions available. Pasting through clipboard or embedding into RTF content only support static images.  This article describes how to insert Windows control objects int…
This document covers how to connect to SQL Server and browse its contents.  It is meant for those new to Visual Studio and/or working with Microsoft SQL Server.  It is not a guide to building SQL Server database connections in your code.  This is mo…
Microsoft Active Directory, the widely used IT infrastructure, is known for its high risk of credential theft. The best way to test your Active Directory’s vulnerabilities to pass-the-ticket, pass-the-hash, privilege escalation, and malware attacks …
Two types of users will appreciate AOMEI Backupper Pro: 1 - Those with PCIe drives (and haven't found cloning software that works on them). 2 - Those who want a fast clone of their boot drive (no re-boots needed) and it can clone your drive wh…

813 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

Need Help in Real-Time?

Connect with top rated Experts

12 Experts available now in Live!

Get 1:1 Help Now