XML Help - Visual Basic .NET

Mark Cooney

OK this might be long winded by want to show you everything I am doing.

Down below is the result I get from an API Call to a website called Betfair.

The following is some code I am trying, but I have also tried many different
variations.
Dim response As HttpWebResponse = request.GetResp onse()

'Get the response stream
Dim reader As StreamReader = New StreamReader(re sponse.GetRespo nseStream)

Dim objDoc As New System.Xml.XmlD ocument
objDoc.Load(rea der)

Dim Node As XmlNode = objDoc.SelectSi ngleNode("/channel/status")
MsgBox(Node.Val ue)

I am trying to the word "RUNNING" from within line 3 of the call but instead
I am getting NullReferenceEx ception.
I want to keep my code as simple as possible and I will want to pull other
information such as the id attribute from line 4 of the call.

Can anyone help?
MC
API Call Returns the following:
<channelSnapsho t>
<channel gameType="POKER " id="1444074" name="Exchange Poker Texas
Hold'em">
<status>RUNNING </status>
<game id="1817283">
<round>3</round>
<bettingWindowT ime>45</bettingWindowTi me>
<bettingWindowP ercentageComple te>24</bettingWindowPe rcentageComplet e>
<gameData>
<object name="Hand 1">
<description>On e Pair, Fours, Ace High,
with Q, 8 Kickers</description>
<status>IN_PLAY </status>
<property name="Card 1" value="20"/>
<property name="Card 2" value="29"/>
</object>
<object name="Hand 2">
<description>On e Pair, Sixes, Ace
High</description>
<status>IN_PLAY </status>
<property name="Card 1" value="5"/>
<property name="Card 2" value="44"/>
</object>
<object name="Hand 3">
<description>On e Pair, Fours, Ace High,
with Q, 6 Kickers</description>
<status>IN_PLAY </status>
<property name="Card 1" value="31"/>
<property name="Card 2" value="42"/>
</object>
<object name="Hand 4">
<description>Ac e High</description>
<status>IN_PLAY </status>
<property name="Card 1" value="49"/>
<property name="Card 2" value="45"/>
</object>
<object name="Community Cards">
<description/>
<status>N/A</status>
<property name="Card 1" value="3"/>
<property name="Card 2" value="13"/>
<property name="Card 3" value="11"/>
<property name="Card 4" value="NOT
AVAILABLE"/>
<property name="Card 5" value="NOT
AVAILABLE"/>
</object>
</gameData>
<markets currency="GBP">
<market id="5615051">
<status>ACTIV E</status>
<commissionRate >2.5</commissionRate>
<marketType>WIN _ONLY</marketType>
<selections type="MainBets" >
<selection id="658439">
<name>Hand 1</name>
<resource
href="https://api.games.betfa ir.com/rest/v1/selection/tradeActivity?m arketId=5615051 &selectionId=65 8439"
responseType="s electionTradeAc tivity" title="Trade Activity"/>
<status>IN_PLAY </status>
<amountMatched> 22.74</amountMatched>
<bestAvailableT oBackPrices>
<price
amountUnmatched ="204.42">6. 6</price>
<price
amountUnmatched ="381.64">6. 55</price>
<price
amountUnmatched ="576.92">6. 5</price>
</bestAvailableTo BackPrices>
<bestAvailableT oLayPrices>
<price
amountUnmatched ="74.6">6.7</price>
<price
amountUnmatched ="504.74">6. 75</price>
<price
amountUnmatched ="551.44">6. 8</price>
</bestAvailableTo LayPrices>
</selection>
<selection id="658440">
<name>Hand 2</name>
<resource
href="https://api.games.betfa ir.com/rest/v1/selection/tradeActivity?m arketId=5615051 &selectionId=65 8440"
responseType="s electionTradeAc tivity" title="Trade Activity"/>
<status>IN_PLAY </status>
<amountMatched> 88.68</amountMatched>
<bestAvailableT oBackPrices>
<price
amountUnmatched ="306.66">1. 72</price>
<price
amountUnmatched ="4127.36">1.71 </price>
<price
amountUnmatched ="59.63">1.7 </price>
</bestAvailableTo BackPrices>
<bestAvailableT oLayPrices>
<price
amountUnmatched ="99.98">1.7 3</price>
<price
amountUnmatched ="2188.96">1.74 </price>
<price
amountUnmatched ="2200.77">1.75 </price>
</bestAvailableTo LayPrices>
</selection>
<selection id="658441">
<name>Hand 3</name>
<resource
href="https://api.games.betfa ir.com/rest/v1/selection/tradeActivity?m arketId=5615051 &selectionId=65 8441"
responseType="s electionTradeAc tivity" title="Trade Activity"/>
<status>IN_PLAY </status>
<amountMatched> 102.9</amountMatched>
<bestAvailableT oBackPrices>
<price
amountUnmatched ="17.99">45. 0</price>
<price
amountUnmatched ="140.4">44. 5</price>
<price
amountUnmatched ="2.19">44.0 </price>
</bestAvailableTo BackPrices>
<bestAvailableT oLayPrices>
<price
amountUnmatched ="33.52">46. 0</price>
<price
amountUnmatched ="53.76">46. 5</price>
<price
amountUnmatched ="79.76">47. 0</price>
</bestAvailableTo LayPrices>
</selection>
<selection id="658442">
<name>Hand 4</name>
<resource
href="https://api.games.betfa ir.com/rest/v1/selection/tradeActivity?m arketId=5615051 &selectionId=65 8442"
responseType="s electionTradeAc tivity" title="Trade Activity"/>
<status>IN_PLAY </status>
<amountMatched> 1020.0</amountMatched>
<bestAvailableT oBackPrices>
<price
amountUnmatched ="158.07">4. 0</price>
<price
amountUnmatched ="198.19">3. 98</price>
<price
amountUnmatched ="631.28">3. 96</price>
</bestAvailableTo BackPrices>
<bestAvailableT oLayPrices>
<price
amountUnmatched ="103.84">4. 06</price>
<price
amountUnmatched ="612.72">4. 08</price>
<price
amountUnmatched ="914.6">4.1 </price>
</bestAvailableTo LayPrices>
</selection>
</selections>
</market>
</markets>
</game>
</channel>
</channelSnapshot >

Feb 21 '07 #1

Subscribe Reply

1369

Stephany Young

Your:

Dim Node As XmlNode = objDoc.SelectSi ngleNode("/channel/status")

is the issue. The SelectSingleNod e method is relative to your current scope
(or position in the XmlDocument).

Your XPath expression is saying, get me the first status child element of
the first channel child element from where I am current at.

You are executing it from the objDoc object which does not have any channel
child elements. It has a single child element called channelSnapshot .

You can use this syntax:

Dim Node As XmlNode =
objDoc.Document Element.SelectS ingleNode("/channel/status")

which uses the same XPath expession but 'moves' the starting point to the
channelSnapshot element, or you can use this syntax:

Dim Node As XmlNode = objDoc.SelectSi ngleNode("//channel/status")

where the // indicates 'any descendant' element.

To get the value you then need to use:

Dim status As String = Node.InnerText

Like wise the next bit would be:
Node = objDoc.SelectSi ngleNode("//channel/game")

Dim id As String = Node.Attibbutes ("id").Value
"Mark Cooney" <ma**@mcooney.c o.ukwrote in message
news:eD******** ******@TK2MSFTN GP06.phx.gbl...

OK this might be long winded by want to show you everything I am doing.

Down below is the result I get from an API Call to a website called
Betfair.

The following is some code I am trying, but I have also tried many
different
variations.
Dim response As HttpWebResponse = request.GetResp onse()

'Get the response stream
Dim reader As StreamReader = New StreamReader(re sponse.GetRespo nseStream)

Dim objDoc As New System.Xml.XmlD ocument
objDoc.Load(rea der)

Dim Node As XmlNode = objDoc.SelectSi ngleNode("/channel/status")
MsgBox(Node.Val ue)

I am trying to the word "RUNNING" from within line 3 of the call but
instead
I am getting NullReferenceEx ception.
I want to keep my code as simple as possible and I will want to pull other
information such as the id attribute from line 4 of the call.

Can anyone help?
MC
API Call Returns the following:
<channelSnapsho t>
<channel gameType="POKER " id="1444074" name="Exchange Poker Texas
Hold'em">
<status>RUNNING </status>
<game id="1817283">
<round>3</round>
<bettingWindowT ime>45</bettingWindowTi me>

<bettingWindowP ercentageComple te>24</bettingWindowPe rcentageComplet e>
<gameData>
<object name="Hand 1">
<description>On e Pair, Fours, Ace High,
with Q, 8 Kickers</description>
<status>IN_PLAY </status>
<property name="Card 1" value="20"/>
<property name="Card 2" value="29"/>
</object>
<object name="Hand 2">
<description>On e Pair, Sixes, Ace
High</description>
<status>IN_PLAY </status>
<property name="Card 1" value="5"/>
<property name="Card 2" value="44"/>
</object>
<object name="Hand 3">
<description>On e Pair, Fours, Ace High,
with Q, 6 Kickers</description>
<status>IN_PLAY </status>
<property name="Card 1" value="31"/>
<property name="Card 2" value="42"/>
</object>
<object name="Hand 4">
<description>Ac e High</description>
<status>IN_PLAY </status>
<property name="Card 1" value="49"/>
<property name="Card 2" value="45"/>
</object>
<object name="Community Cards">
<description/>
<status>N/A</status>
<property name="Card 1" value="3"/>
<property name="Card 2" value="13"/>
<property name="Card 3" value="11"/>
<property name="Card 4" value="NOT
AVAILABLE"/>
<property name="Card 5" value="NOT
AVAILABLE"/>
</object>
</gameData>
<markets currency="GBP">
<market id="5615051">
<status>ACTIV E</status>
<commissionRate >2.5</commissionRate>
<marketType>WIN _ONLY</marketType>
<selections type="MainBets" >
<selection id="658439">
<name>Hand 1</name>
<resource
href="https://api.games.betfa ir.com/rest/v1/selection/tradeActivity?m arketId=5615051 &selectionId=65 8439"
responseType="s electionTradeAc tivity" title="Trade Activity"/>
<status>IN_PLAY </status>

<amountMatched> 22.74</amountMatched>
<bestAvailableT oBackPrices>
<price
amountUnmatched ="204.42">6. 6</price>
<price
amountUnmatched ="381.64">6. 55</price>
<price
amountUnmatched ="576.92">6. 5</price>
</bestAvailableTo BackPrices>
<bestAvailableT oLayPrices>
<price
amountUnmatched ="74.6">6.7</price>
<price
amountUnmatched ="504.74">6. 75</price>
<price
amountUnmatched ="551.44">6. 8</price>
</bestAvailableTo LayPrices>
</selection>
<selection id="658440">
<name>Hand 2</name>
<resource
href="https://api.games.betfa ir.com/rest/v1/selection/tradeActivity?m arketId=5615051 &selectionId=65 8440"
responseType="s electionTradeAc tivity" title="Trade Activity"/>
<status>IN_PLAY </status>

<amountMatched> 88.68</amountMatched>
<bestAvailableT oBackPrices>
<price
amountUnmatched ="306.66">1. 72</price>
<price
amountUnmatched ="4127.36">1.71 </price>
<price
amountUnmatched ="59.63">1.7 </price>
</bestAvailableTo BackPrices>
<bestAvailableT oLayPrices>
<price
amountUnmatched ="99.98">1.7 3</price>
<price
amountUnmatched ="2188.96">1.74 </price>
<price
amountUnmatched ="2200.77">1.75 </price>
</bestAvailableTo LayPrices>
</selection>
<selection id="658441">
<name>Hand 3</name>
<resource
href="https://api.games.betfa ir.com/rest/v1/selection/tradeActivity?m arketId=5615051 &selectionId=65 8441"
responseType="s electionTradeAc tivity" title="Trade Activity"/>
<status>IN_PLAY </status>

<amountMatched> 102.9</amountMatched>
<bestAvailableT oBackPrices>
<price
amountUnmatched ="17.99">45. 0</price>
<price
amountUnmatched ="140.4">44. 5</price>
<price
amountUnmatched ="2.19">44.0 </price>
</bestAvailableTo BackPrices>
<bestAvailableT oLayPrices>
<price
amountUnmatched ="33.52">46. 0</price>
<price
amountUnmatched ="53.76">46. 5</price>
<price
amountUnmatched ="79.76">47. 0</price>
</bestAvailableTo LayPrices>
</selection>
<selection id="658442">
<name>Hand 4</name>
<resource
href="https://api.games.betfa ir.com/rest/v1/selection/tradeActivity?m arketId=5615051 &selectionId=65 8442"
responseType="s electionTradeAc tivity" title="Trade Activity"/>
<status>IN_PLAY </status>

<amountMatched> 1020.0</amountMatched>
<bestAvailableT oBackPrices>
<price
amountUnmatched ="158.07">4. 0</price>
<price
amountUnmatched ="198.19">3. 98</price>
<price
amountUnmatched ="631.28">3. 96</price>
</bestAvailableTo BackPrices>
<bestAvailableT oLayPrices>
<price
amountUnmatched ="103.84">4. 06</price>
<price
amountUnmatched ="612.72">4. 08</price>
<price
amountUnmatched ="914.6">4.1 </price>
</bestAvailableTo LayPrices>
</selection>
</selections>
</market>
</markets>
</game>
</channel>
</channelSnapshot >

Feb 21 '07 #2

Mark Cooney

Stephany

Thanks for your help, I have made the changes and tried variations but
unfortunately I am still getting same.

This is the code I have now:

Dim response As HttpWebResponse = request.GetResp onse()

'Get the response stream

Dim reader As StreamReader = New StreamReader(re sponse.GetRespo nseStream)

Dim objDoc As New System.Xml.XmlD ocument

objDoc.Load(rea der)

Dim Node As XmlNode =
objDoc.Document Element.SelectS ingleNode("//channelSnapshot/channel/status")

MsgBox(Node.Inn erText)

Do you have a sample piece of code I could look at?

Regards

"Stephany Young" <noone@localhos twrote in message
news:uu******** ******@TK2MSFTN GP05.phx.gbl...

Your:

Dim Node As XmlNode = objDoc.SelectSi ngleNode("/channel/status")

is the issue. The SelectSingleNod e method is relative to your current
scope (or position in the XmlDocument).

Your XPath expression is saying, get me the first status child element of
the first channel child element from where I am current at.

You are executing it from the objDoc object which does not have any
channel child elements. It has a single child element called
channelSnapshot .

You can use this syntax:

Dim Node As XmlNode =
objDoc.Document Element.SelectS ingleNode("/channel/status")

which uses the same XPath expession but 'moves' the starting point to the
channelSnapshot element, or you can use this syntax:

Dim Node As XmlNode = objDoc.SelectSi ngleNode("//channel/status")

where the // indicates 'any descendant' element.

To get the value you then need to use:

Dim status As String = Node.InnerText

Like wise the next bit would be:
Node = objDoc.SelectSi ngleNode("//channel/game")

Dim id As String = Node.Attibbutes ("id").Value
"Mark Cooney" <ma**@mcooney.c o.ukwrote in message
news:eD******** ******@TK2MSFTN GP06.phx.gbl...
>OK this might be long winded by want to show you everything I am doing.

Down below is the result I get from an API Call to a website called
Betfair.

The following is some code I am trying, but I have also tried many
different
variations.
Dim response As HttpWebResponse = request.GetResp onse()

'Get the response stream
Dim reader As StreamReader = New StreamReader(re sponse.GetRespo nseStream)

Dim objDoc As New System.Xml.XmlD ocument
objDoc.Load(re ader)

Dim Node As XmlNode = objDoc.SelectSi ngleNode("/channel/status")
MsgBox(Node.Va lue)

I am trying to the word "RUNNING" from within line 3 of the call but
instead
I am getting NullReferenceEx ception.
I want to keep my code as simple as possible and I will want to pull
other
information such as the id attribute from line 4 of the call.

Can anyone help?
MC
API Call Returns the following:
<channelSnapsh ot>
<channel gameType="POKER " id="1444074" name="Exchange Poker Texas
Hold'em">
<status>RUNNING </status>
<game id="1817283">
<round>3</round>
<bettingWindowT ime>45</bettingWindowTi me>

<bettingWindow PercentageCompl ete>24</bettingWindowPe rcentageComplet e>
<gameData>
<object name="Hand 1">
<description>On e Pair, Fours, Ace High,
with Q, 8 Kickers</description>
<status>IN_PLAY </status>
<property name="Card 1" value="20"/>
<property name="Card 2" value="29"/>
</object>
<object name="Hand 2">
<description>On e Pair, Sixes, Ace
High</description>
<status>IN_PLAY </status>
<property name="Card 1" value="5"/>
<property name="Card 2" value="44"/>
</object>
<object name="Hand 3">
<description>On e Pair, Fours, Ace High,
with Q, 6 Kickers</description>
<status>IN_PLAY </status>
<property name="Card 1" value="31"/>
<property name="Card 2" value="42"/>
</object>
<object name="Hand 4">
<description>Ac e High</description>
<status>IN_PLAY </status>
<property name="Card 1" value="49"/>
<property name="Card 2" value="45"/>
</object>
<object name="Community Cards">
<description/>
<status>N/A</status>
<property name="Card 1" value="3"/>
<property name="Card 2" value="13"/>
<property name="Card 3" value="11"/>
<property name="Card 4" value="NOT
AVAILABLE"/>
<property name="Card 5" value="NOT
AVAILABLE"/>
</object>
</gameData>
<markets currency="GBP">
<market id="5615051">
<status>ACTIV E</status>
<commissionRate >2.5</commissionRate>
<marketType>WIN _ONLY</marketType>
<selections type="MainBets" >
<selection id="658439">
<name>Hand 1</name>
<resource
href="https://api.games.betfa ir.com/rest/v1/selection/tradeActivity?m arketId=5615051 &selectionId=65 8439"
responseType=" selectionTradeA ctivity" title="Trade Activity"/>
<status>IN_PLAY </status>

<amountMatched >22.74</amountMatched>
<bestAvailableT oBackPrices>
<price
amountUnmatche d="204.42">6. 6</price>
<price
amountUnmatche d="381.64">6.55 </price>
<price
amountUnmatche d="576.92">6. 5</price>
</bestAvailableTo BackPrices>
<bestAvailableT oLayPrices>
<price
amountUnmatche d="74.6">6.7</price>
<price
amountUnmatche d="504.74">6.75 </price>
<price
amountUnmatche d="551.44">6. 8</price>
</bestAvailableTo LayPrices>
</selection>
<selection id="658440">
<name>Hand 2</name>
<resource
href="https://api.games.betfa ir.com/rest/v1/selection/tradeActivity?m arketId=5615051 &selectionId=65 8440"
responseType=" selectionTradeA ctivity" title="Trade Activity"/>
<status>IN_PLAY </status>

<amountMatched >88.68</amountMatched>
<bestAvailableT oBackPrices>
<price
amountUnmatche d="306.66">1.72 </price>
<price
amountUnmatche d="4127.36">1.7 1</price>
<price
amountUnmatche d="59.63">1.7 </price>
</bestAvailableTo BackPrices>
<bestAvailableT oLayPrices>
<price
amountUnmatche d="99.98">1.7 3</price>
<price
amountUnmatche d="2188.96">1.7 4</price>
<price
amountUnmatche d="2200.77">1.7 5</price>
</bestAvailableTo LayPrices>
</selection>
<selection id="658441">
<name>Hand 3</name>
<resource
href="https://api.games.betfa ir.com/rest/v1/selection/tradeActivity?m arketId=5615051 &selectionId=65 8441"
responseType=" selectionTradeA ctivity" title="Trade Activity"/>
<status>IN_PLAY </status>

<amountMatched >102.9</amountMatched>
<bestAvailableT oBackPrices>
<price
amountUnmatche d="17.99">45. 0</price>
<price
amountUnmatche d="140.4">44. 5</price>
<price
amountUnmatche d="2.19">44.0 </price>
</bestAvailableTo BackPrices>
<bestAvailableT oLayPrices>
<price
amountUnmatche d="33.52">46. 0</price>
<price
amountUnmatche d="53.76">46. 5</price>
<price
amountUnmatche d="79.76">47. 0</price>
</bestAvailableTo LayPrices>
</selection>
<selection id="658442">
<name>Hand 4</name>
<resource
href="https://api.games.betfa ir.com/rest/v1/selection/tradeActivity?m arketId=5615051 &selectionId=65 8442"
responseType=" selectionTradeA ctivity" title="Trade Activity"/>
<status>IN_PLAY </status>

<amountMatched >1020.0</amountMatched>
<bestAvailableT oBackPrices>
<price
amountUnmatche d="158.07">4. 0</price>
<price
amountUnmatche d="198.19">3.98 </price>
<price
amountUnmatche d="631.28">3.96 </price>
</bestAvailableTo BackPrices>
<bestAvailableT oLayPrices>
<price
amountUnmatche d="103.84">4.06 </price>
<price
amountUnmatche d="612.72">4.08 </price>
<price
amountUnmatche d="914.6">4.1 </price>
</bestAvailableTo LayPrices>
</selection>
</selections>
</market>
</markets>
</game>
</channel>
</channelSnapshot >

Feb 21 '07 #3

Stephany Young

I gave you the code!!!!

Why did you change:

Dim Node As XmlNode = objDoc.SelectSi ngleNode("//channel/status")

to

Dim Node As XmlNode =
objDoc.Document Element.SelectS ingleNode("//channelSnapshot/channel/status")

Notice the difference!!!!! !
"Mark Cooney" <ma**@mcooney.c o.ukwrote in message
news:%2******** ********@TK2MSF TNGP03.phx.gbl. ..

Stephany

Thanks for your help, I have made the changes and tried variations but
unfortunately I am still getting same.

This is the code I have now:

Dim response As HttpWebResponse = request.GetResp onse()

'Get the response stream

Dim reader As StreamReader = New StreamReader(re sponse.GetRespo nseStream)

Dim objDoc As New System.Xml.XmlD ocument

objDoc.Load(rea der)

Dim Node As XmlNode =
objDoc.Document Element.SelectS ingleNode("//channelSnapshot/channel/status")

MsgBox(Node.Inn erText)

Do you have a sample piece of code I could look at?

Regards

"Stephany Young" <noone@localhos twrote in message
news:uu******** ******@TK2MSFTN GP05.phx.gbl...
>Your:

Dim Node As XmlNode = objDoc.SelectSi ngleNode("/channel/status")

is the issue. The SelectSingleNod e method is relative to your current
scope (or position in the XmlDocument).

Your XPath expression is saying, get me the first status child element of
the first channel child element from where I am current at.

You are executing it from the objDoc object which does not have any
channel child elements. It has a single child element called
channelSnapsho t.

You can use this syntax:

Dim Node As XmlNode =
objDoc.Documen tElement.Select SingleNode("/channel/status")

which uses the same XPath expession but 'moves' the starting point to the
channelSnapsho t element, or you can use this syntax:

Dim Node As XmlNode = objDoc.SelectSi ngleNode("//channel/status")

where the // indicates 'any descendant' element.

To get the value you then need to use:

Dim status As String = Node.InnerText

Like wise the next bit would be:
Node = objDoc.SelectSi ngleNode("//channel/game")

Dim id As String = Node.Attibbutes ("id").Value
"Mark Cooney" <ma**@mcooney.c o.ukwrote in message
news:eD******* *******@TK2MSFT NGP06.phx.gbl.. .
>>OK this might be long winded by want to show you everything I am doing.

Down below is the result I get from an API Call to a website called
Betfair.

The following is some code I am trying, but I have also tried many
different
variations.
Dim response As HttpWebResponse = request.GetResp onse()

'Get the response stream
Dim reader As StreamReader = New
StreamReader( response.GetRes ponseStream)

Dim objDoc As New System.Xml.XmlD ocument
objDoc.Load(r eader)

Dim Node As XmlNode = objDoc.SelectSi ngleNode("/channel/status")
MsgBox(Node.V alue)

I am trying to the word "RUNNING" from within line 3 of the call but
instead
I am getting NullReferenceEx ception.
I want to keep my code as simple as possible and I will want to pull
other
information such as the id attribute from line 4 of the call.

Can anyone help?
MC
API Call Returns the following:
<channelSnaps hot>
<channel gameType="POKER " id="1444074" name="Exchange Poker
Texas
Hold'em">
<status>RUNNING </status>
<game id="1817283">
<round>3</round>
<bettingWindowT ime>45</bettingWindowTi me>

<bettingWindo wPercentageComp lete>24</bettingWindowPe rcentageComplet e>
<gameData>
<object name="Hand 1">
<description>On e Pair, Fours, Ace High,
with Q, 8 Kickers</description>
<status>IN_PLAY </status>
<property name="Card 1" value="20"/>
<property name="Card 2" value="29"/>
</object>
<object name="Hand 2">
<description>On e Pair, Sixes, Ace
High</description>
<status>IN_PLAY </status>
<property name="Card 1" value="5"/>
<property name="Card 2" value="44"/>
</object>
<object name="Hand 3">
<description>On e Pair, Fours, Ace High,
with Q, 6 Kickers</description>
<status>IN_PLAY </status>
<property name="Card 1" value="31"/>
<property name="Card 2" value="42"/>
</object>
<object name="Hand 4">
<description>Ac e High</description>
<status>IN_PLAY </status>
<property name="Card 1" value="49"/>
<property name="Card 2" value="45"/>
</object>
<object name="Community Cards">
<description/>
<status>N/A</status>
<property name="Card 1" value="3"/>
<property name="Card 2" value="13"/>
<property name="Card 3" value="11"/>
<property name="Card 4" value="NOT
AVAILABLE"/>
<property name="Card 5" value="NOT
AVAILABLE"/>
</object>
</gameData>
<markets currency="GBP">
<market id="5615051">
<status>ACTIV E</status>
<commissionRate >2.5</commissionRate>
<marketType>WIN _ONLY</marketType>
<selections type="MainBets" >
<selection id="658439">
<name>Hand 1</name>
<resource
href="https ://api.games.betfa ir.com/rest/v1/selection/tradeActivity?m arketId=5615051 &selectionId=65 8439"
responseType= "selectionTrade Activity" title="Trade Activity"/>
<status>IN_PLAY </status>

<amountMatche d>22.74</amountMatched>
<bestAvailableT oBackPrices>
<price
amountUnmatch ed="204.42">6.6 </price>
<price
amountUnmatch ed="381.64">6.5 5</price>
<price
amountUnmatch ed="576.92">6.5 </price>
</bestAvailableTo BackPrices>
<bestAvailableT oLayPrices>
<price
amountUnmatch ed="74.6">6.7</price>
<price
amountUnmatch ed="504.74">6.7 5</price>
<price
amountUnmatch ed="551.44">6.8 </price>
</bestAvailableTo LayPrices>
</selection>
<selection id="658440">
<name>Hand 2</name>
<resource
href="https ://api.games.betfa ir.com/rest/v1/selection/tradeActivity?m arketId=5615051 &selectionId=65 8440"
responseType= "selectionTrade Activity" title="Trade Activity"/>
<status>IN_PLAY </status>

<amountMatche d>88.68</amountMatched>
<bestAvailableT oBackPrices>
<price
amountUnmatch ed="306.66">1.7 2</price>
<price
amountUnmatch ed="4127.36">1. 71</price>
<price
amountUnmatch ed="59.63">1.7 </price>
</bestAvailableTo BackPrices>
<bestAvailableT oLayPrices>
<price
amountUnmatch ed="99.98">1.73 </price>
<price
amountUnmatch ed="2188.96">1. 74</price>
<price
amountUnmatch ed="2200.77">1. 75</price>
</bestAvailableTo LayPrices>
</selection>
<selection id="658441">
<name>Hand 3</name>
<resource
href="https ://api.games.betfa ir.com/rest/v1/selection/tradeActivity?m arketId=5615051 &selectionId=65 8441"
responseType= "selectionTrade Activity" title="Trade Activity"/>
<status>IN_PLAY </status>

<amountMatche d>102.9</amountMatched>
<bestAvailableT oBackPrices>
<price
amountUnmatch ed="17.99">45.0 </price>
<price
amountUnmatch ed="140.4">44.5 </price>
<price
amountUnmatch ed="2.19">44.0 </price>
</bestAvailableTo BackPrices>
<bestAvailableT oLayPrices>
<price
amountUnmatch ed="33.52">46.0 </price>
<price
amountUnmatch ed="53.76">46.5 </price>
<price
amountUnmatch ed="79.76">47.0 </price>
</bestAvailableTo LayPrices>
</selection>
<selection id="658442">
<name>Hand 4</name>
<resource
href="https ://api.games.betfa ir.com/rest/v1/selection/tradeActivity?m arketId=5615051 &selectionId=65 8442"
responseType= "selectionTrade Activity" title="Trade Activity"/>
<status>IN_PLAY </status>

<amountMatche d>1020.0</amountMatched>
<bestAvailableT oBackPrices>
<price
amountUnmatch ed="158.07">4.0 </price>
<price
amountUnmatch ed="198.19">3.9 8</price>
<price
amountUnmatch ed="631.28">3.9 6</price>
</bestAvailableTo BackPrices>
<bestAvailableT oLayPrices>
<price
amountUnmatch ed="103.84">4.0 6</price>
<price
amountUnmatch ed="612.72">4.0 8</price>
<price
amountUnmatch ed="914.6">4.1 </price>
</bestAvailableTo LayPrices>
</selection>
</selections>
</market>
</markets>
</game>
</channel>
</channelSnapshot >

Feb 21 '07 #4

Mark Cooney

While i've tried many variations of what you said but I am still getting the
error.

I am now trying XMLReader.

I have got it reading but going through the XML and looking up "status" and
it is returning the contents of the each of the status elements within the
documents.

Next step, just give it what i need!!
"Stephany Young" <noone@localhos twrote in message
news:OM******** ******@TK2MSFTN GP06.phx.gbl...

>I gave you the code!!!!

Why did you change:

Dim Node As XmlNode = objDoc.SelectSi ngleNode("//channel/status")

to

Dim Node As XmlNode =
objDoc.Document Element.SelectS ingleNode("//channelSnapshot/channel/status")

Notice the difference!!!!! !
"Mark Cooney" <ma**@mcooney.c o.ukwrote in message
news:%2******** ********@TK2MSF TNGP03.phx.gbl. ..
>Stephany

Thanks for your help, I have made the changes and tried variations but
unfortunatel y I am still getting same.

This is the code I have now:

Dim response As HttpWebResponse = request.GetResp onse()

'Get the response stream

Dim reader As StreamReader = New StreamReader(re sponse.GetRespo nseStream)

Dim objDoc As New System.Xml.XmlD ocument

objDoc.Load(re ader)

Dim Node As XmlNode =
objDoc.Documen tElement.Select SingleNode("//channelSnapshot/channel/status")

MsgBox(Node.In nerText)

Do you have a sample piece of code I could look at?

Regards

"Stephany Young" <noone@localhos twrote in message
news:uu******* *******@TK2MSFT NGP05.phx.gbl.. .
>>Your:

Dim Node As XmlNode = objDoc.SelectSi ngleNode("/channel/status")

is the issue. The SelectSingleNod e method is relative to your current
scope (or position in the XmlDocument).

Your XPath expression is saying, get me the first status child element
of the first channel child element from where I am current at.

You are executing it from the objDoc object which does not have any
channel child elements. It has a single child element called
channelSnapsh ot.

You can use this syntax:

Dim Node As XmlNode =
objDoc.Docume ntElement.Selec tSingleNode("/channel/status")

which uses the same XPath expession but 'moves' the starting point to
the channelSnapshot element, or you can use this syntax:

Dim Node As XmlNode = objDoc.SelectSi ngleNode("//channel/status")

where the // indicates 'any descendant' element.

To get the value you then need to use:

Dim status As String = Node.InnerText

Like wise the next bit would be:
Node = objDoc.SelectSi ngleNode("//channel/game")

Dim id As String = Node.Attibbutes ("id").Value
"Mark Cooney" <ma**@mcooney.c o.ukwrote in message
news:eD****** ********@TK2MSF TNGP06.phx.gbl. ..
OK this might be long winded by want to show you everything I am doing.

Down below is the result I get from an API Call to a website called
Betfair.

The following is some code I am trying, but I have also tried many
different
variations .
Dim response As HttpWebResponse = request.GetResp onse()

'Get the response stream
Dim reader As StreamReader = New
StreamReader (response.GetRe sponseStream)

Dim objDoc As New System.Xml.XmlD ocument
objDoc.Load( reader)

Dim Node As XmlNode = objDoc.SelectSi ngleNode("/channel/status")
MsgBox(Node. Value)

I am trying to the word "RUNNING" from within line 3 of the call but
instead
I am getting NullReferenceEx ception.
I want to keep my code as simple as possible and I will want to pull
other
informatio n such as the id attribute from line 4 of the call.

Can anyone help?
MC
API Call Returns the following:
<channelSnap shot>
<channel gameType="POKER " id="1444074" name="Exchange Poker
Texas
Hold'em">
<status>RUNNING </status>
<game id="1817283">
<round>3</round>
<bettingWindowT ime>45</bettingWindowTi me>

<bettingWind owPercentageCom plete>24</bettingWindowPe rcentageComplet e>
<gameData>
<object name="Hand 1">
<description>On e Pair, Fours, Ace High,
with Q, 8 Kickers</description>
<status>IN_PLAY </status>
<property name="Card 1" value="20"/>
<property name="Card 2" value="29"/>
</object>
<object name="Hand 2">
<description>On e Pair, Sixes, Ace
High</description>
<status>IN_PLAY </status>
<property name="Card 1" value="5"/>
<property name="Card 2" value="44"/>
</object>
<object name="Hand 3">
<description>On e Pair, Fours, Ace High,
with Q, 6 Kickers</description>
<status>IN_PLAY </status>
<property name="Card 1" value="31"/>
<property name="Card 2" value="42"/>
</object>
<object name="Hand 4">
<description>Ac e High</description>
<status>IN_PLAY </status>
<property name="Card 1" value="49"/>
<property name="Card 2" value="45"/>
</object>
<object name="Community Cards">
<description/>
<status>N/A</status>
<property name="Card 1" value="3"/>
<property name="Card 2" value="13"/>
<property name="Card 3" value="11"/>
<property name="Card 4" value="NOT
AVAILABLE"/>
<property name="Card 5" value="NOT
AVAILABLE"/>
</object>
</gameData>
<markets currency="GBP">
<market id="5615051">
<status>ACTIV E</status>
<commissionRate >2.5</commissionRate>
<marketType>WIN _ONLY</marketType>
<selections type="MainBets" >
<selection id="658439">
<name>Hand 1</name>
<resource
href="http s://api.games.betfa ir.com/rest/v1/selection/tradeActivity?m arketId=5615051 &selectionId=65 8439"
responseType ="selectionTrad eActivity" title="Trade Activity"/>
<status>IN_PLAY </status>

<amountMatch ed>22.74</amountMatched>
<bestAvailableT oBackPrices>
<price
amountUnmatc hed="204.42">6. 6</price>
<price
amountUnmatc hed="381.64">6. 55</price>
<price
amountUnmatc hed="576.92">6. 5</price>

</bestAvailableTo BackPrices>
<bestAvailableT oLayPrices>
<price
amountUnmatc hed="74.6">6.7</price>
<price
amountUnmatc hed="504.74">6. 75</price>
<price
amountUnmatc hed="551.44">6. 8</price>
</bestAvailableTo LayPrices>
</selection>
<selection id="658440">
<name>Hand 2</name>
<resource
href="http s://api.games.betfa ir.com/rest/v1/selection/tradeActivity?m arketId=5615051 &selectionId=65 8440"
responseType ="selectionTrad eActivity" title="Trade Activity"/>
<status>IN_PLAY </status>

<amountMatch ed>88.68</amountMatched>
<bestAvailableT oBackPrices>
<price
amountUnmatc hed="306.66">1. 72</price>
<price
amountUnmatc hed="4127.36">1 .71</price>
<price
amountUnmatc hed="59.63">1.7 </price>

</bestAvailableTo BackPrices>
<bestAvailableT oLayPrices>
<price
amountUnmatc hed="99.98">1.7 3</price>
<price
amountUnmatc hed="2188.96">1 .74</price>
<price
amountUnmatc hed="2200.77">1 .75</price>
</bestAvailableTo LayPrices>
</selection>
<selection id="658441">
<name>Hand 3</name>
<resource
href="http s://api.games.betfa ir.com/rest/v1/selection/tradeActivity?m arketId=5615051 &selectionId=65 8441"
responseType ="selectionTrad eActivity" title="Trade Activity"/>
<status>IN_PLAY </status>

<amountMatch ed>102.9</amountMatched>
<bestAvailableT oBackPrices>
<price
amountUnmatc hed="17.99">45. 0</price>
<price
amountUnmatc hed="140.4">44. 5</price>
<price
amountUnmatc hed="2.19">44.0 </price>

</bestAvailableTo BackPrices>
<bestAvailableT oLayPrices>
<price
amountUnmatc hed="33.52">46. 0</price>
<price
amountUnmatc hed="53.76">46. 5</price>
<price
amountUnmatc hed="79.76">47. 0</price>
</bestAvailableTo LayPrices>
</selection>
<selection id="658442">
<name>Hand 4</name>
<resource
href="http s://api.games.betfa ir.com/rest/v1/selection/tradeActivity?m arketId=5615051 &selectionId=65 8442"
responseType ="selectionTrad eActivity" title="Trade Activity"/>
<status>IN_PLAY </status>

<amountMatch ed>1020.0</amountMatched>
<bestAvailableT oBackPrices>
<price
amountUnmatc hed="158.07">4. 0</price>
<price
amountUnmatc hed="198.19">3. 98</price>
<price
amountUnmatc hed="631.28">3. 96</price>

</bestAvailableTo BackPrices>
<bestAvailableT oLayPrices>
<price
amountUnmatc hed="103.84">4. 06</price>
<price
amountUnmatc hed="612.72">4. 08</price>
<price
amountUnmatc hed="914.6">4.1 </price>
</bestAvailableTo LayPrices>
</selection>
</selections>
</market>
</markets>
</game>
</channel>
</channelSnapshot >

Feb 21 '07 #5

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