Solved

Linq to XML Using Visual Basic

Posted on 2012-04-06
4
493 Views
Last Modified: 2012-04-06
How do I use Linq to get a list of countries that start with the letter 'B'?

Here's the data:

<?xml version="1.0" standalone="yes"?>
<NewDataSet>
  <xs:schema id="NewDataSet" xmlns="" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
    <xs:element name="NewDataSet" msdata:IsDataSet="true" msdata:UseCurrentLocale="true">
      <xs:complexType>
        <xs:choice minOccurs="0" maxOccurs="unbounded">
          <xs:element name="Table1">
            <xs:complexType>
              <xs:sequence>
                <xs:element name="ID" type="xs:int" minOccurs="0" />
                <xs:element name="CountryName" minOccurs="0">
                  <xs:simpleType>
                    <xs:restriction base="xs:string">
                      <xs:maxLength value="255" />
                    </xs:restriction>
                  </xs:simpleType>
                </xs:element>
              </xs:sequence>
            </xs:complexType>
          </xs:element>
        </xs:choice>
      </xs:complexType>
    </xs:element>
  </xs:schema>
  <Table1>
    <ID>1</ID>
    <CountryName>Afghanistan</CountryName>
  </Table1>
  <Table1>
    <ID>2</ID>
    <CountryName>Albania</CountryName>
  </Table1>
  <Table1>
    <ID>3</ID>
    <CountryName>Algeria</CountryName>
  </Table1>
  <Table1>
    <ID>4</ID>
    <CountryName>Andorra</CountryName>
  </Table1>
  <Table1>
    <ID>5</ID>
    <CountryName>Angola</CountryName>
  </Table1>
  <Table1>
    <ID>6</ID>
    <CountryName>Antigua and Barbuda</CountryName>
  </Table1>
  <Table1>
    <ID>7</ID>
    <CountryName>Argentina</CountryName>
  </Table1>
  <Table1>
    <ID>8</ID>
    <CountryName>Armenia</CountryName>
  </Table1>
  <Table1>
    <ID>9</ID>
    <CountryName>Australia</CountryName>
  </Table1>
  <Table1>
    <ID>10</ID>
    <CountryName>Austria</CountryName>
  </Table1>
  <Table1>
    <ID>11</ID>
    <CountryName>Azerbaijan</CountryName>
  </Table1>
  <Table1>
    <ID>12</ID>
    <CountryName>Bahrain</CountryName>
  </Table1>
  <Table1>
    <ID>13</ID>
    <CountryName>Bangladesh</CountryName>
  </Table1>
  <Table1>
    <ID>14</ID>
    <CountryName>Barbados</CountryName>
  </Table1>
  <Table1>
    <ID>15</ID>
    <CountryName>Belarus</CountryName>
  </Table1>
  <Table1>
    <ID>16</ID>
    <CountryName>Belgium</CountryName>
  </Table1>
  <Table1>
    <ID>17</ID>
    <CountryName>Belize</CountryName>
  </Table1>
  <Table1>
    <ID>18</ID>
    <CountryName>Benin</CountryName>
  </Table1>
  <Table1>
    <ID>19</ID>
    <CountryName>Bhutan</CountryName>
  </Table1>
  <Table1>
    <ID>20</ID>
    <CountryName>Bolivia</CountryName>
  </Table1>
  <Table1>
    <ID>21</ID>
    <CountryName>Bosnia and Herzegovina</CountryName>
  </Table1>
  <Table1>
    <ID>22</ID>
    <CountryName>Botswana</CountryName>
  </Table1>
  <Table1>
    <ID>23</ID>
    <CountryName>Brazil</CountryName>
  </Table1>
  <Table1>
    <ID>24</ID>
    <CountryName>Brunei</CountryName>
  </Table1>
  <Table1>
    <ID>25</ID>
    <CountryName>Bulgaria</CountryName>
  </Table1>
  <Table1>
    <ID>26</ID>
    <CountryName>Burkina Faso</CountryName>
  </Table1>
  <Table1>
    <ID>27</ID>
    <CountryName>Burundi</CountryName>
  </Table1>
  <Table1>
    <ID>28</ID>
    <CountryName>Cambodia</CountryName>
  </Table1>
  <Table1>
    <ID>29</ID>
    <CountryName>Cameroon</CountryName>
  </Table1>
  <Table1>
    <ID>30</ID>
    <CountryName>Canada</CountryName>
  </Table1>
 </NewDataSet>
0
Comment
Question by:Ray Turner
[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 75

Accepted Solution

by:
käµfm³d   👽 earned 500 total points
ID: 37817642
Here is one example:

Module Module1

    Sub Main()
        Dim query = From country In System.Xml.Linq.XDocument.Load("input.xml").Descendants("CountryName") _
                    Where country.Value.StartsWith("B") _
                    Select country.Value

        For Each countryName In query
            Console.WriteLine(countryName)
        Next

        Console.ReadKey()
    End Sub

End Module

Open in new window

0
 

Author Comment

by:Ray Turner
ID: 37817764
I got following error.  How do I fix?

Expression of type 'System.Collections.Generic.IEnumerable(Of System.Xml.Linq..XElement)' is not queryable
0
 
LVL 75

Assisted Solution

by:käµfm³d 👽
käµfm³d   👽 earned 500 total points
ID: 37817974
Sorry about that. Add Imports System.Linq to the top of your file.
0
 

Author Closing Comment

by:Ray Turner
ID: 37818145
Thanks!!!
0

Featured Post

How our DevOps Teams Maximize Uptime

Our Dev teams are like yours. They’re continually cranking out code for new features/bugs fixes, testing, deploying, responding to production monitoring events and more. It’s complex. So, we thought you’d like to see what’s working for us. Read the use case whitepaper.

Question has a verified solution.

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

Suggested Solutions

Title # Comments Views Activity
IDE for Python 5 73
Json and ajax 1 23
VB.net/VSTO Excel Add-in 2 19
Display info from DB to Label in asp.net 7 19
Calculating holidays and working days is a function that is often needed yet it is not one found within the Framework. This article presents one approach to building a working-day calculator for use in .NET.
This article shows how to deploy dynamic backgrounds to computers depending on the aspect ratio of display
The Email Laundry PDF encryption service allows companies to send confidential encrypted  emails to anybody. The PDF document can also contain attachments that are embedded in the encrypted PDF. The password is randomly generated by The Email Laundr…
In a recent question (https://www.experts-exchange.com/questions/29004105/Run-AutoHotkey-script-directly-from-Notepad.html) here at Experts Exchange, a member asked how to run an AutoHotkey script (.AHK) directly from Notepad++ (aka NPP). This video…

730 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